Conference Abstracts

2025

• "Jet streams in a changing climate: evidence for large increases in shear and turbulence since 1979"
  Williams, P. D., Prosser, M. C., and Smith, I. H., European Geosciences Union General Assembly, Vienna, 2025.

• "How representative are turbulence diagnostic statistics on seasonal time scales?"
  Kaluza, T., Williams, P. D., Schultz, D. M., Vaughan, G., and Banyard, T. P., European Geosciences Union General Assembly, Vienna, 2025.

• "Climate change will increase aircraft take-off distances and reduce payloads, but by how much?"
  Williams, J., Williams, P. D., Guerrini, F., and Venturini, M., European Geosciences Union General Assembly, Vienna, 2025.

• "A Source of Clear-Air Turbulence? Tracking Gravity Wave Formation in Inertially Unstable Regions"
  Banyard, T. P., Schultz, D. M., Vaughan, G., Burgess, B. H., Kaluza, T., and Williams, P. D. European Geosciences Union General Assembly, Vienna, 2025.

• "Trends in vertical wind shear and clear-air turbulence since 1979"
  Williams, P. D., Smith, I. H., and Prosser, M. C., American Meteorological Society 105th Annual Meeting: 25th Conference on Aviation, Range, and Aerospace Meteorology, New Orleans, Louisiana, 2025.

2024

• "Clear-air turbulence in a changing climate"
  Williams, P. D., Prosser, M. C., and Smith, I. H., World Meteorological Organization (WMO) Aeronautical Meteorology Scientific Conference, WMO Headquarters, Geneva, 2024.

• "Enhancing confidence in the climatological distribution of aviation turbulence through a careful reevaluation of AMDAR turbulence report statistics"
  Kaluza, T., Williams, P. D., Schultz, D. M., Vaughan, G., and Banyard, T. P., World Meteorological Organization (WMO) Aeronautical Meteorology Scientific Conference, WMO Headquarters, Geneva, 2024.

• "Quantifying increased aircraft take-off distances under climate change at European airports"
  Williams, J., Williams, P. D., Guerrini, F., Venturini, M., and Trentini, L., World Meteorological Organization (WMO) Aeronautical Meteorology Scientific Conference, WMO Headquarters, Geneva, 2024.

• "Jet Streams in a Changing Climate: Evidence for Large Increases in Shear and Turbulence since 1979"
  Williams, P. D., Smith, I. H., and Prosser, M. C., American Geophysical Union (AGU) Annual Meeting, Washington, D.C., USA, 2024.

• "Climatology of Upper-Tropospheric / Lower-Stratospheric Turbulence From Aircraft Measurements of Eddy Dissipation Rate"
  Kaluza, T., Williams, P. D., Schultz, D. M., Vaughan, G., and Banyard, T. P., Royal Meteorological Society Annual Weather and Climate Conference, University of Reading, UK, 2024.

• "A CATalyst for Clear-Air Turbulence? Tracking Gravity Wave Formation in Inertially Unstable Regions"
  Banyard, T. P., Schultz, D. M., Vaughan, G., Burgess, B. H., Kaluza, T., and Williams, P. D. Royal Meteorological Society Annual Weather and Climate Conference, University of Reading, UK, 2024.

• "Impacts of Climate Change on Jet Streams and Clear-Air Turbulence"
  Williams, P. D., Prosser, M. C., and Smith, I. H., American Meteorological Society 24th Conference on Atmospheric and Oceanic Fluid Dynamics, Burlington, Vermont, USA, 2024.

• "Future changes in weather and climate hazards to aviation"
  Williams, P. D., Prosser, M. C., and Smith, I. H., European Geosciences Union General Assembly, Vienna, 2024.

• "Low-Potential Vorticity Air Near the Jet Stream Associated with Clear-Air Turbulence: Two Case Studies"
  Burgess, B. H., Vaughan, G., Schultz, D. M., and Williams, P. D., American Meteorological Society 104th Annual Meeting: Daniel Keyser Symposium, Baltimore, Maryland, 2024.

2023

• "Climate change impacts on turbulence"
  Williams, P. D., Prosser, M. C., and Smith, I. H., World Meteorological Organization (WMO) Aeronautical Meteorology Scientific Webinars, online, 2023.

• "Using High Resolution Global Climate Models to Project Trends in Clear Air Turbulence Over the North Atlantic"
  Smith, I. H., Williams, P. D., and Schiemann, R. K., Asia Oceania Geosciences Society (AOGS) 20th Annual Meeting, Singapore, 2023.

• "Evidence for Large Increases in Clear-Air Turbulence over the Past Four Decades"
  Williams, P. D., Prosser, M. C., Marlton, G. J. and Harrison, R. G., European Geosciences Union General Assembly, Vienna, 2023.

• "Winter jet stream wind speed changes in the eastern North Atlantic"
  Tenenbaum, J. and Williams, P. D., European Geosciences Union General Assembly, Vienna, 2023.

• "Power System Resiliency: Weather Patterns Linked to Transmission and Distribution Outages"
  Ariail, I., Brayshaw, D., Williams, P. D. and Burke, C., European Geosciences Union General Assembly, Vienna, 2023.

• "Does El Niño Affect Global Clear-Air Turbulence?"
  Williams, P. D. and Cheyne, R. H. F., American Meteorological Society 103rd Annual Meeting: 23rd Conference on Aviation, Range, and Aerospace Meteorology, Denver, Colorado, 2023.

2022

• "The Performance of Filtered Leapfrog Schemes in Benchmark Simulations"
  Williams, P. D., Straka, J. M. and Kanak, K. M., American Geophysical Union Fall Meeting, Chicago, 2022.

• "The Impacts of Climate Change on Aircraft Noise Near Airports"
  Padhra, A., Rapsomanikis, S., Gratton, G. B. and Williams, P. D., 4th International Aviation Management Conference (IAMC), Emirates Aviation University, Dubai, UAE, 2022.

• "Multi-Hazard Approach to Weather Impacts on the Power Grid"
  Ariail, I., Brayshaw, D., Williams, P. D. and Burke, C., Supergen Energy Networks Hub Conference, Cardiff, 2022.

• "Does ENSO Affect Global Clear-Air Turbulence? (Invited)"
  Williams, P. D. and Cheyne, R. H. F., Asia Oceania Geosciences Society (AOGS) 19th Annual Meeting, 2022 [held virtually due to COVID-19].

• "Reducing CO2 Emissions for Aircraft Flights Through Complex Wind Fields Using Dynamic Programming"
  Wells, C., Williams, P. D., Nichols, N. K., Kalise, D. and Poll, I., SIAM Conference on Mathematics of Planet Earth, Pittsburgh, Pennsylvania, 2022.

• "Does ENSO Affect Global Clear-Air Turbulence?"
  Williams, P. D. and Cheyne, R. H. F., European Geosciences Union General Assembly, Vienna, 2022.

• "Reducing aviation emissions: investigating time minimal and fixed time trajectories for transatlantic flights"
  Wells, C., Williams, P. D., Nichols, N. K., Kalise, D. and Poll, I., European Geosciences Union General Assembly, Vienna, 2022.

• "Using high-resolution climate models to predict increases in atmospheric turbulence"
  Smith, I. H., Williams, P. D., and Schiemann, R. K., European Geosciences Union General Assembly, Vienna, 2022.

• "Examining Clear-Air Turbulence (CAT) climatologies and trends in ERA5 reanalysis (1979-2020)"
  Prosser, M., Williams, P. D., and Marlton, G. J., European Geosciences Union General Assembly, Vienna, 2022.

• "Weather, climate change, and aviation (keynote)"
  Williams, P. D., International Society of Biometeorology (ISB) 7th International Conference on Climate, Tourism and Recreation (CCTR), University of South-Eastern Norway, Bø, 2022 [held virtually due to COVID-19].

• "Does ENSO Affect Global Atmospheric Turbulence?"
  Williams, P. D. and Cheyne, R. H. F., Ocean Sciences Meeting, Honolulu, Hawaii, 2022 [held virtually due to COVID-19].

• "Can Climate Models Successfully Diagnose Clear-Air Turbulence and Its Response to Climate Change?"
  Williams, P. D. and Storer, L. N., American Meteorological Society 102nd Annual Meeting: 22nd Conference on Aviation, Range, and Aerospace Meteorology, Houston, Texas, 2022 [held virtually due to COVID-19].

• "Does ENSO Affect Global Clear-Air Turbulence?"
  Williams, P. D. and Cheyne, R. H. F., American Meteorological Society 102nd Annual Meeting: 35th Conference on Climate Variability and Change, Houston, Texas, 2022 [held virtually due to COVID-19].

2021

• "Can Climate Models Successfully Diagnose Clear-Air Turbulence and its Response to Climate Change?"
  Williams, P. D. and Storer, L. N., American Geophysical Union Fall Meeting, New Orleans, Louisiana, 2021 [held virtually due to COVID-19].

• "Does ENSO Affect Global Clear-Air Turbulence?"
  Williams, P. D. and Cheyne, R. H. F., American Geophysical Union Fall Meeting, New Orleans, Louisiana, 2021 [held virtually due to COVID-19].

• "Impacts of Climate Variability and Climate Change on Clear-Air Turbulence"
  Williams, P. D., 4th NCAR/FAA/MITRE Turbulence Mitigation Workshop, 2021 [held virtually due to COVID-19].

• "Aviation Meteorology in a Changing Climate (Invited)"
  Williams, P. D., Asia Oceania Geosciences Society (AOGS) 18th Annual Meeting, Singapore, 2021 [held virtually due to COVID-19].

• "Using High Resolution Climate Models to Investigate Atmospheric Turbulence"
  Smith, I. H., Williams, P. D., and Schiemann, R. K., Royal Meteorological Society (RMetS) Student and Early Career Scientists Conference, 2021 [held virtually due to COVID-19].

• "Optimal control for trajectory planning, minimizing fuel burn and CO2 emissions for fixed duration aircraft flights through complex wind fields"
  Wells, C., Williams, P. D., Nichols, N. K., Kalise, D. and Poll, I., SIAM-IMA Student Chapter National Conference, Oxford University, 2021 [held virtually due to COVID-19].

• "Optimal Control for Trajectory Planning, Minimizing Fuel Burn and CO2 Emissions for Fixed Duration Aircraft Flights Through Complex Wind Fields"
  Wells, C., Williams, P. D., Nichols, N. K., Kalise, D. and Poll, I., SIAM Conference on Applications of Dynamical Systems (DS21), Portland, Oregon, 2021 [held virtually due to COVID-19].

2020

• "How will climate change affect flight routes and turbulence?"
  Williams, P. D., 3rd Environmentally Compatible Air Transport System (ECATS) Conference: Making aviation environmentally sustainable, Gothenburg, 2020 [held virtually due to COVID-19].

• "Reducing aviation emissions and fuel burn by re-routing transatlantic flights"
  Wells, C., Williams, P. D., Nichols, N. K., Kalise, D. and Poll, I., 3rd Environmentally Compatible Air Transport System (ECATS) Conference: Making aviation environmentally sustainable, Gothenburg, 2020 [held virtually due to COVID-19].

• "Aviation Meteorology in a Changing Climate (Invited)"
  Williams, P. D., Asia Oceania Geosciences Society (AOGS) 17th Annual Meeting, Sono Belle Vivaldi Park, Hongcheon, South Korea, 2020 [cancelled due to COVID-19].

• "Increased Shear in the UTLS Jet Stream over the Past Four Decades"
  Williams, P. D., Lee, S. H. and Frame, T. H. A., Asia Oceania Geosciences Society (AOGS) 17th Annual Meeting, Sono Belle Vivaldi Park, Hongcheon, South Korea, 2020 [cancelled due to COVID-19].

• "Changes in Aircraft Wind Speed Observations and Their Effect on Secular Changes in Eastern North Atlantic Jet Stream Reanalyses"
  Tenenbaum, J. and Williams, P. D., Asia Oceania Geosciences Society (AOGS) 17th Annual Meeting, Sono Belle Vivaldi Park, Hongcheon, South Korea, 2020 [cancelled due to COVID-19].

• "Aviation meteorology in a changing climate"
  Williams, P. D., European Geosciences Union General Assembly, Vienna, 2020 [held virtually due to COVID-19].

• "When Science Communication Becomes Difficult: Advice From The Battlefields"
  Williams, P. D., European Geosciences Union General Assembly, Vienna, 2020 [held virtually due to COVID-19].

• "Increased Shear in the North Atlantic Upper-Level Jet Stream over the Past Four Decades"
  Williams, P. D., Lee, S. H. and Frame, T. H. A., American Meteorological Society 100th Annual Meeting: 33rd Conference on Climate Variability and Change, Boston, Massachusetts, 2020.

• "Increased Light, Moderate, and Severe Clear-Air Turbulence in Response to Climate Change (Invited)"
  Williams, P. D., American Meteorological Society 100th Annual Meeting: 20th Conference on Aviation, Range, and Aerospace Meteorology, Boston, Massachusetts, 2020.

2019

• "Increased Shear in the North Atlantic Upper-Level Jet Stream over the Past Four Decades"
  Williams, P. D., Lee, S. H. and Frame, T. H. A., American Geophysical Union Fall Meeting, San Francisco, California, 2019.

• "When Science Communication Becomes Difficult: Advice From The Battlefields"
  Williams, P. D., American Geophysical Union Fall Meeting, San Francisco, California, 2019.

• "Pro-L* - A Probabilistic L* Mapping Tool for Ground Observations to the Magnetic Equator"
  Thompson, R. L., Morley, S., Watt, C., Bentley, S. and Williams, P. D., American Geophysical Union Fall Meeting, San Francisco, California, 2019.

• "Stochastic parameterizations in space weather models: Application to Earth's radiation belts"
  Watt, C., Thompson, R., Bentley, S., Williams, P. D., Rae, I. J., Allison, H., Murphy, K. R., Meredith, N., Glauert, S., Horne, R., Anekallu, C. and Forsyth, C., Sixteenth European Space Weather Week, Liège, Belgium, 2019.

• "How will climate change affect aviation?"
  Williams, P. D., European Meteorological Society Annual Meeting, Technical University of Denmark (DTU), Copenhagen, Denmark, 2019.

• "The route to more sustainable flight"
  Wells, C., Williams, P. D., Nichols, N. K. and Poll, I., NCEO and CEOI Earth Observation Conference, Nottingham Trent University, 2019.

• "Is climate change increasing atmospheric turbulence?"
  Williams, P. D., UK Fluids Conference, University of Cambridge, 2019.

• "Time and Space Variations in Upper Level Turbulence Events from the Global Aircraft Data Set (GADS) Archive"
  Tenenbaum, J. and Williams, P. D., Asia Oceania Geosciences Society (AOGS) 16th Annual Meeting, Singapore, 2019.

• "Increased shear in the North Atlantic upper-level jet stream over the past four decades"
  Frame, T. H. A., Lee, S. H. and Williams, P. D., International Union of Geodesy and Geophysics (IUGG) 27th General Assembly, Montréal, 2019.

• "Increased Shear in the North Atlantic Upper-Level Jet Stream over the Past Four Decades"
  Williams, P. D., Lee, S. H. and Frame, T. H. A., National Centre for Atmospheric Science (NCAS) and Royal Meteorological Society (RMetS) Atmospheric Science Conference, University of Birmingham, 2019.

• "Time filters in weather and climate models"
  Williams, P. D., Workshop on Time Filters and Predictive Accuracy, University of Pittsburgh, USA, 2019.

• "Increased shear in the North Atlantic upper-level jet stream over the past four decades"
  Williams, P. D., Lee, S. H. and Frame, T. H. A., Geophysical Research Abstracts, 21(16794), 2019, presented at European Geosciences Union General Assembly, Vienna.

2018

• "Increased atmospheric turbulence from climate change"
  Williams, P. D., SPARC/FISAPS Workshop on Atmospheric Turbulence, Leibniz Institute of Atmospheric Physics, Kühlungsborn, Germany, 2018.

• "Increased shear in the North Atlantic upper-level jet stream over the past four decades"
  Williams, P. D., Lee, S. H. and Frame, T. H. A., CliMathNet Sixth Annual Meeting, University of Reading, 2018.

• "Climate Change in Aviation Impacts"
  Williams, P. D., 3rd Turbulence Impact Mitigation Workshop, The MITRE Corporation, McLean, Virginia, USA, 2018.

• "Increased shear in the North Atlantic upper-level jet stream over the past four decades"
  Williams, P. D., Lee, S. H. and Frame, T. H. A., 4th National Climate Dynamics Workshop, University of Oxford, 2018.

• "Global response of clear-air turbulence to climate change"
  Williams, P. D., Storer, L. N. and Joshi, M. M., Asia Oceania Geosciences Society (AOGS) 15th Annual Meeting, Honolulu, Hawaii, USA, 2018.

• "Improved climate simulations through a stochastic parameterization of ocean eddies"
  Williams, P. D., Howe, N. J., Gregory, J. M., Smith, R. S. and Joshi, M. M., Asia Oceania Geosciences Society (AOGS) 15th Annual Meeting, Honolulu, Hawaii, USA, 2018.

• "Aircraft observations and reanalysis depictions of trends in the North Atlantic polar jet stream wind speeds and turbulence"
  Tenenbaum, J. and Williams, P. D., Asia Oceania Geosciences Society (AOGS) 15th Annual Meeting, Honolulu, Hawaii, USA, 2018.

• "Impact of large-scale variability on trans-oceanic flight routes"
  Kim, J.-H., Kim, D., Sharman, R. and Williams, P. D., Asia Oceania Geosciences Society (AOGS) 15th Annual Meeting, Honolulu, Hawaii, USA, 2018.

• "Global response of clear-air turbulence to climate change"
  Williams, P. D., China–UK Symposium on Meteorology and Environment, Nanjing University of Information Science and Technology, China, 2018.

• "Volcanic plume charging at Stromboli volcano"
  Nicoll, K., Airey, M., Koh, K., Cimarelli, C., Gaudin, D., Knuever, M., Bennett, A., Harrison, R. G., Marlton, G., Williams, P. D. and Fullekrug, M., Geophysical Research Abstracts, 20(8146), 2018, presented at European Geosciences Union General Assembly, Vienna.

• "The impacts of climate change on aircraft operations"
  Gratton, G. B., Williams, P. D., Rapsomanikis, S., Smith, V. A., Warnock-Smith, D., Padhra, A., Vermeulen, N., Jude, S. and Forster, P. M., NCAS Staff Conference, Manchester, 2018.

• "Global response of clear-air turbulence to climate change"
  Storer, L. N., Williams, P. D. and Joshi, M. M., American Meteorological Society 98th Annual Meeting: 6th Symposium on Aviation, Range, and Aerospace Meteorology, Austin, Texas, 2018.

• "Multi-model ensemble forecasts of aviation turbulence"
  Storer, L. N., Gill, P. and Williams, P. D., American Meteorological Society 98th Annual Meeting: 6th Symposium on Aviation, Range, and Aerospace Meteorology, Austin, Texas, 2018.

2017

• "How will the changing atmospheric circulation influence clear-air turbulence?"
  Williams, P. D., American Geophysical Union Fall Meeting, New Orleans, Louisiana, 2017.

• "Using music to communicate weather and climate"
  Williams, P. D., Aplin, K. and Brown, S., American Geophysical Union Fall Meeting, New Orleans, Louisiana, 2017.

• "How will climate change affect air travel?"
  Williams, P. D., ICAO Seminar on Green Airports, Montréal, Canada, 2017.

• "Global response of clear-air turbulence to climate change"
  Williams, P. D., Storer, L. N. and Joshi, M. M., Proceedings of the 2017 World Meteorological Organization (WMO) Aeronautical Meteorology Scientific Conference, pp 3.8-3.16, Toulouse, France, 2017.

• "Aircraft observations and reanalysis depictions of trends in the North Atlantic polar front jet stream wind speeds and turbulence"
  Tenenbaum, J. and Williams, P. D., Proceedings of the 2017 World Meteorological Organization (WMO) Aeronautical Meteorology Scientific Conference, pp 3.17-3.24, Toulouse, France, 2017.

• "Interannual variations and secular trends in winter North Atlantic jet stream wind speeds and turbulence from the GADS data set"
  Tenenbaum, J. and Williams, P. D., 5th International Conference on Reanalysis, Rome, Italy, 2017.

• "Atmospheric flow regimes: stochasticity and noise-induced transitions"
  Williams, P. D., CNRS Workshop on Interdisciplinary Geo-Astro Fluid Dynamics, Paris, France, 2017.

• "Diapycnal mixing from time-stepping schemes"
  Williams, P. D., Challenger Society Ocean Modelling Group Meeting, Met Office, Exeter, UK, 2017.

• "The response of severe aircraft turbulence to climate change"
  Williams, P. D., Third international conference on Advances in Extreme Value Analysis and Application to Natural Hazards (EVAN), National Oceanography Centre Southampton, 2017.

• "VolcLab: A balloon-borne instrument package to measure ash, gas, electrical, and turbulence properties of volcanic plumes"
  Airey, M. W., Harrison, R. G., Nicoll, K. A., Williams, P. D. and Marlton, G. J., Third international conference on Advances in Extreme Value Analysis and Application to Natural Hazards (EVAN), National Oceanography Centre Southampton, 2017.

• "Optimising flight routes through an atmospheric wind field: the effects of climate change"
  Williams, P. D., CliMathNet Fifth Annual Meeting, University of Reading, 2017.

• "Global response of clear-air turbulence to climate change"
  Storer, L. N., Williams, P. D. and Joshi, M. M., CliMathNet Fifth Annual Meeting, University of Reading, 2017.

• "VolcLab: A balloon-borne instrument package to measure ash, gas, electrical, and turbulence properties of volcanic plumes"
  Airey, M. W., Harrison, R. G., Nicoll, K. A., Williams, P. D. and Marlton, G. J., International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI) Scientific Assembly, Portland, Oregon, USA, 2017.

• "Atmospheric flow regimes: stochasticity and noise-induced transitions"
  Williams, P. D., Workshop on Climate Fluctuations and Non-equilibrium Statistical Mechanics: An Interdisciplinary Dialogue, Max Planck Institute for the Physics of Complex Systems, Dresden, 2017.

• "A comparison of turbulence measurements made by balloon-borne accelerometers and MST radar"
  Marlton, G., Hooper, D., Harrison, G., Nicoll, K., Williams, P. D. and Lee, C., 15th International Workshop on Technical and Scientific Aspects of MST Radar, Tokyo, 2017.

• "Increased light, moderate, and severe clear-air turbulence in response to climate change"
  Williams, P. D., Geophysical Research Abstracts, 19(3537), 2017, presented at European Geosciences Union General Assembly, Vienna.

• "Modelling climate impacts on the aviation sector"
  Williams, P. D., Geophysical Research Abstracts, 19(3561), 2017, presented at European Geosciences Union General Assembly, Vienna.

• "Improved climate simulations through a stochastic parameterization of ocean eddies"
  Williams, P. D., Howe, N. J., Gregory, J. M., Smith, R. S. and Joshi, M. M., Geophysical Research Abstracts, 19(3663), 2017, presented at European Geosciences Union General Assembly, Vienna.

• "Using a balloon-borne accelerometer to improve understanding of the turbulent structure of the atmosphere for aviation"
  Marlton, G. J., Harrison, R. G., Nicoll, K. A. and Williams, P. D., Geophysical Research Abstracts, 19(6869), 2017, presented at European Geosciences Union General Assembly, Vienna.

• "VolcLab: A balloon-borne instrument package to measure ash, gas, electrical, and turbulence properties of volcanic plumes"
  Airey, M. W., Harrison, R. G., Nicoll, K. A., Williams, P. D. and Marlton, G. J., Geophysical Research Abstracts, 19(7134), 2017, presented at European Geosciences Union General Assembly, Vienna.

• "An oscillating microbalance for meteorological measurements of ice and volcanic ash accumulation from a weather balloon platform"
  Airey, M. W., Harrison, R. G., Nicoll, K. A., Williams, P. D. and Marlton, G. J., Geophysical Research Abstracts, 19(7187), 2017, presented at European Geosciences Union General Assembly, Vienna.

• "Gravity wave impacts on planetary circulation: lessons from laboratory experiments"
  Williams, P. D., Winter School on Diversity of Planetary Circulation Regimes in our Solar System and Beyond, École de Physique des Houches, Chamonix, France, 2017.

• "How will climate change affect aviation?"
  Williams, P. D., American Meteorological Society 97th Annual Meeting: 18th Conference on Aviation, Range, and Aerospace Meteorology, Seattle, Washington, 2017.

• "Improved climate simulations through a stochastic parameterization of ocean eddies"
  Williams, P. D., Howe, N. J., Gregory, J. M., Smith, R. S. and Joshi, M. M., American Meteorological Society 97th Annual Meeting: 29th Conference on Climate Variability and Change, Seattle, Washington, 2017.

• "VolcLab: A balloon-borne instrument package to measure ash, gas, electrical, and turbulence properties of volcanic plumes"
  Airey, M. W., Harrison, R. G., Nicoll, K. A., Williams, P. D. and Marlton, G. J., Joint assembly of the Geological Society of London's Tectonic Studies Group (TSG), Volcanic and Magmatic Studies Group (VMSG) and British Geophysical Association (BGA), University of Liverpool, 2017.

2016

• "Turbulence ahead! How climate change will affect air travel (Invited)"
  Williams, P. D., American Geophysical Union Fall Meeting, San Francisco, California, 2016.

• "Using music to communicate weather and climate (Invited)"
  Williams, P. D., Aplin, K., Brown, S., Jenkins, K., Mander, S. and Walsh, C., American Geophysical Union Fall Meeting, San Francisco, California, 2016.

• "Improved climate simulations through a stochastic parameterization of ocean eddies"
  Williams, P. D., Howe, N. J., Gregory, J. M., Smith, R. S. and Joshi, M. M., American Geophysical Union Fall Meeting, San Francisco, California, 2016.

• "VolcLab: A balloon-borne instrument package to measure ash, gas, electrical, and turbulence properties of volcanic plumes"
  Airey, M. W., Harrison, R. G., Nicoll, K. A., Williams, P. D. and Marlton, G. J., Royal Meteorological Society Atmospheric Electricity Group Annual Wilson Meeting, University of Bath, 2016.

• "How will climate change affect aviation?"
  Williams, P. D., Fifth Workshop on Aviation Meteorology, Jeju Island, South Korea, 2016.

• "The impact of extreme events on air travel under climate change"
  Williams, P. D., Second General Assembly of the Maths Foresees EPSRC Network, University of Edinburgh, 2016.

• "The dynamics of baroclinic zonal jets"
  Williams, P. D., Workshop on Turbulence and Waves in Flows Dominated by Rotation: Lessons from Geophysics and Perspectives in Space Physics and Astrophysics, National Center for Atmospheric Research, Colorado, USA, 2016.

• "Transatlantic flight times and climate change"
  Williams, P. D., RMetS NCAS High Impact Weather and Climate Conference, Manchester, 2016.

• "Achieving seventh-order amplitude accuracy in leapfrog integrations"
  Williams, P. D., Workshop on Numerical Analysis and Predictability of Fluid Motion, University of Pittsburgh, USA, 2016.

• "Transatlantic flight times and climate change"
  Williams, P. D., Geophysical Research Abstracts, 18(2187), 2016, presented at European Geosciences Union General Assembly, Vienna.

• "Improved Climate Simulations through a Stochastic Parameterization of Ocean Eddies"
  Williams, P. D., Howe, N. J., Gregory, J. M., Smith, R. S. and Joshi, M. M., Geophysical Research Abstracts, 18(2290), 2016, presented at European Geosciences Union General Assembly, Vienna.

• "Solar radiation measurements from coordinated radiosonde flights during the 20th March 2015 solar eclipse"
  Harrison, R. G., Marlton, G., Williams, P. D. and Nicoll, K., Geophysical Research Abstracts, 18(13916), 2016, presented at European Geosciences Union General Assembly, Vienna.

• "Transatlantic flight times and climate change"
  Williams, P. D., Workshop on the role of atmospheric circulation in regional climate change, University of Reading, 2016.

• "Improved climate simulations through a stochastic representation of ocean eddies"
  Williams, P. D., Howe, N. J., Gregory, J. M., Smith, R. S. and Joshi, M. M., Ocean Sciences Meeting, New Orleans, Louisiana, 2016.

2015

• "The dynamics of baroclinic zonal jets"
  Williams, P. D., American Geophysical Union Fall Meeting, San Francisco, California, 2015.

• "Noise-induced regime transitions in atmospheric flow"
  Williams, P. D., Conference on Complex Systems: Complex Systems Digital Campus World e-Conference, Arizona, USA, 2015.

• "Improved climate simulations through a stochastic representation of ocean eddies"
  Williams, P. D., Challenger Society Ocean Modelling Group Meeting, Corpus Christi College, Cambridge, UK, 2015.

• "Noise-induced regime transitions in atmospheric flow"
  Williams, P. D., XXXV Dynamics Days Europe, Exeter, 2015.

• "Balloon-borne accelerometer observations of atmospheric turbulence"
  Marlton, G. J., Harrison, R. G., Nicoll, K. A. and Williams, P. D., 15th European Meteorological Society Annual Meeting & 12th European Conference on Applications of Meteorology, Sofia, Bulgaria, 2015.

• "Improved climate simulations through a stochastic representation of ocean eddies"
  Williams, P. D., Howe, N. J., Gregory, J. M., Smith, R. S., and Joshi, M. M., National Centre for Atmospheric Science Annual Conference, York, UK, 2015.

• "A comparison of turbulence measurements made by modified radiosondes and MST radar in the free atmosphere"
  Marlton, G. J., Hooper, D., Harrison, R. G., Lee, C., Nicoll, K. A. and Williams, P. D., National Centre for Atmospheric Science Annual Conference, York, UK, 2015.

• "Achieving seventh-order amplitude accuracy in leapfrog integrations"
  Williams, P. D., CliMathNet Third Annual Meeting, University of Bath, 2015.

• "The dynamics of baroclinic zonal jets"
  Williams, P. D., American Meteorological Society 20th Conference on Atmospheric and Oceanic Fluid Dynamics, Minneapolis, USA, 2015.

• "Will climate change increase transatlantic aviation turbulence?"
  Williams, P. D. and Joshi, M. M., American Meteorological Society 20th Conference on Atmospheric and Oceanic Fluid Dynamics, Minneapolis, USA, 2015.

• "Extremes in atmospheric turbulence: response to climate change"
  Williams, P. D., First General Assembly of the Maths Foresees EPSRC Network, University of Leeds, 2015.

• "The dynamics of baroclinic zonal jets"
  Williams, P. D., Geophysical Research Abstracts, 17(2678), 2015, presented at European Geosciences Union General Assembly, Vienna.

• "Achieving seventh-order amplitude accuracy in leapfrog integrations"
  Williams, P. D., Geophysical Research Abstracts, 17(2680), 2015, presented at European Geosciences Union General Assembly, Vienna.

• "Communicating meteorology through popular music"
  Brown, S., Aplin, K., Jenkins, K., Mander, S., Walsh, C. and Williams, P. D., Geophysical Research Abstracts, 17(9938), 2015, presented at European Geosciences Union General Assembly, Vienna.

• "Regime transitions in the atmosphere: insights from laboratory experiments"
  Williams, P. D., Conference on Complex Networks and Climate Variability, Vienna, Austria, 2015.

• "Variability of Turbulence Potentials along the Trans-Atlantic Wind-Optimal Flight Route"
  Kim, J.-H., Chan, W. N., Sridhar, B., Sharman, R. D. and Williams, P. D., American Meteorological Society 95th Annual Meeting: 17th Conference on Aviation, Range, and Aerospace Meteorology, Phoenix, Arizona, 2015.

2014

• "Climatic Impacts of a Stochastic Parameterization of Air–Sea Fluxes"
  Williams, P. D., American Geophysical Union Fall Meeting, San Francisco, California, 2014.

• "Achieving Seventh-Order Amplitude Accuracy in Leapfrog Integrations"
  Williams, P. D., American Geophysical Union Fall Meeting, San Francisco, California, 2014.

• "Stochastic Ocean Eddy Perturbations in a Coupled General Circulation Model"
  Howe, N. J., Williams, P. D., Gregory, J. M. and Smith, R. S., American Geophysical Union Fall Meeting, San Francisco, California, 2014.

• "Clear-air turbulence in a changing climate"
  Williams, P. D., Fourth Workshop on Aviation Meteorology, Yonsei University, Seoul, South Korea, 2014.

• "Will flights get bumpier because of climate change?"
  Williams, P. D. and Joshi, M. M., 14th European Meteorological Society Annual Meeting & 10th European Conference on Applied Climatology, Prague, Czech Republic, 2014.

• "Achieving seventh-order amplitude accuracy in leapfrog integrations"
  Williams, P. D., 14th European Meteorological Society Annual Meeting & 10th European Conference on Applied Climatology, Prague, Czech Republic, 2014.

• "Zonal jet formation in numerical simulations of a large rotating annulus experiment"
  Williams, P. D. and Kelsall, C., 14th European Meteorological Society Annual Meeting & 10th European Conference on Applied Climatology, Prague, Czech Republic, 2014.

• "Stochastic ocean eddy perturbations in a coupled general circulation model"
  Howe, N. J., Williams, P. D., Gregory, J. M. and Smith, R. S., Challenger Society for Marine Science Conference, Plymouth University, 2014.

• "Will climate change increase transatlantic aviation turbulence?"
  Williams, P. D. and Joshi, M. M., World Weather Open Science Conference, Montréal, Canada, 2014.

• "Achieving seventh-order amplitude accuracy in leapfrog integrations"
  Williams, P. D., World Weather Open Science Conference, Montréal, Canada, 2014.

• "Climatic impacts of a stochastic parameterization of air–sea fluxes"
  Williams, P. D., World Weather Open Science Conference, Montréal, Canada, 2014.

• "Achieving seventh-order amplitude accuracy in leapfrog integrations"
  Williams, P. D., NCAS Science Conference, Bristol, 2014.

• "The composite-tendency RAW filter in semi-implicit integrations"
  Amezcua, J. and Williams, P. D., Geophysical Research Abstracts, 16(2677), 2014, presented at European Geosciences Union General Assembly, Vienna.

• "Turbulence detection using radiosondes: plugging the gaps in the observation of turbulence"
  Marlton, G. J., Harrison, R. G., Williams, P. D. and Nicoll, K. A., Geophysical Research Abstracts, 16(12392), 2014, presented at European Geosciences Union General Assembly, Vienna.

• "Confronting reanalysis datasets with independent radiosonde observations"
  Marlton, G. J., Harrison, R. G., Williams, P. D. and Nicoll, K. A., Geophysical Research Abstracts, 16(12575), 2014, presented at European Geosciences Union General Assembly, Vienna.

• "Zonal jet formation in numerical simulations of a large rotating annulus experiment"
  Williams, P. D. and Kelsall, C. W., presented at Eddy–Mean-Flow Interactions in Fluids, Kavli Institute for Theoretical Physics, University of California, Santa Barbara, 2014.

• "Will flights get bumpier because of climate change?"
  Williams, P. D., presented at Royal Society Research Fellows Conference, The Royal Society, London, 2014.

• "The effect of climate change on transatlantic aviation turbulence in the UTLS region"
  Williams, P. D. and Joshi, M. M., presented at SPARC General Assembly, Queenstown, New Zealand, 2014.

2013

• "Will Climate Change Increase Transatlantic Aviation Turbulence?"
  Williams, P. D. and Joshi, M. M., Abstract A44C-07, presented at American Geophysical Union Fall Meeting, San Francisco, California, 2013.

• "Testing the limits of quasi-geostrophic theory"
  Williams, P. D., Read, P. L. and Haine, T. W. N., Partial Differential Equations and Geophysical Fluid Dynamics workshop, Isaac Newton Institute for Mathematical Sciences, University of Cambridge, UK, 2013.

• "Numerical simulations of banded jets in the laboratory"
  Williams, P. D., RIMS International Conference on Zonal Flows in Geophysical and Astrophysical Fluids, Kyoto, Japan, 2013.

• "Achieving seventh-order amplitude accuracy in leapfrog integrations"
  Williams, P. D., EuroMech Colloquium 552: Modelling Atmospheric and Oceanic Flows: insights from laboratory experiments and numerical simulations, Berlin, 2013.

• "Inertia–gravity waves in the rotating annulus"
  Williams, P. D., EuroMech Colloquium 552: Modelling Atmospheric and Oceanic Flows: insights from laboratory experiments and numerical simulations, Berlin, 2013.

• "Climatic impacts of a stochastic parameterization of air–sea fluxes"
  Williams, P. D., Symposium on Stochastic Parameterisation in Weather and Climate Models, Meteorological Institute, University of Bonn, 2013.

• "Will climate change increase transatlantic aviation turbulence?"
  Williams, P. D. and Joshi, M. M., 13th European Meteorological Society Annual Meeting & 11th European Conference on Applications of Meteorology, University of Reading, 2013.

• "Achieving seventh-order amplitude accuracy in leapfrog integrations"
  Williams, P. D., 13th European Meteorological Society Annual Meeting & 11th European Conference on Applications of Meteorology, University of Reading, 2013.

• "Climatic impacts of a stochastic parameterization of air–sea fluxes"
  Williams, P. D., 13th European Meteorological Society Annual Meeting & 11th European Conference on Applications of Meteorology, University of Reading, 2013.

• "Turbulence detection using radiosondes: plugging the gaps in the observation of turbulence"
  Marlton, G. J., Harrison, R. G., Williams, P. D. and Nicoll, K. A., 13th European Meteorological Society Annual Meeting & 11th European Conference on Applications of Meteorology, University of Reading, 2013.

• "Clear-Air Turbulence in a Changing World: New Results from Research and Operations"
  Knox, J. A., Williams, P. D. and Wilson, E. N., NCAR Aviation Turbulence Workshop, Boulder, 2013.

• "Will climate change increase transatlantic aviation turbulence?"
  Williams, P. D. and Joshi, M. M., NCAS Staff Meeting, Birmingham, 2013.

• "Comparison of weather-balloon observations of in-cloud and clear-air turbulence with model predictions"
  Marlton, G. J., Harrison, R. G., Williams, P. D. and Nicoll, K. A., presented at Workshop on Research Applications of High Resolution Radiosonde Data, Stony Brook University, New York, 2013.

• "Will climate change increase transatlantic aviation turbulence?"
  Williams, P. D. and Joshi, M. M., Geophysical Research Abstracts, 15(1724), 2013, presented at European Geosciences Union General Assembly, Vienna.

• "Achieving seventh-order amplitude accuracy in leapfrog integrations"
  Williams, P. D., Geophysical Research Abstracts, 15(1725), 2013, presented at European Geosciences Union General Assembly, Vienna.

• "Climatic impacts of a stochastic parameterization of air–sea fluxes"
  Williams, P. D., Geophysical Research Abstracts, 15(1727), 2013, presented at European Geosciences Union General Assembly, Vienna.

• "Climatic impacts of a stochastic parameterization of air–sea fluxes"
  Williams, P. D., presented at Workshop on Stochastic Modelling and Computing for Weather and Climate Prediction, Oriel College, Oxford, 2013.

• "Intensification of Transatlantic Aviation Turbulence in Response to Anthropogenic Climate Change"
  Williams, P. D. and Joshi, M. M., presented at American Meteorological Society 93rd Annual Meeting: 16th Conference on Aviation, Range, and Aerospace Meteorology, Austin, Texas, 2013.

• "A Simple Method for Improving the Time-Stepping Accuracy of Weather and Climate Models"
  Williams, P. D., presented at American Meteorological Society 93rd Annual Meeting: Special Symposium on Advancing Weather and Climate Forecasts: Innovative Techniques and Applications, Austin, Texas, 2013.

• "Climatic impacts of a stochastic parameterization of air–sea fluxes"
  Williams, P. D., presented at American Meteorological Society 93rd Annual Meeting: 25th Conference on Climate Variability and Change, Austin, Texas, 2013.

• "Three Centuries of Meteorological Phenomena Represented in Western Classical Orchestral Music"
  Aplin, K. A. and Williams, P. D., presented at American Meteorological Society 93rd Annual Meeting: 11th History Symposium, Austin, Texas, 2013.

2012

• "Climatic impacts of a stochastic parameterization of air–sea fluxes (Invited)"
  Williams, P. D., Abstract NG44A-02, presented at American Geophysical Union Fall Meeting, San Francisco, California, 2012.

• "A simple method for improving the time-stepping accuracy in atmosphere and ocean models"
  Williams, P. D., Abstract A53C-0161, presented at American Geophysical Union Fall Meeting, San Francisco, California, 2012.

• "Meteorological phenomena in Western classical orchestral music"
  Williams, P. D. and Aplin, K. L., Abstract PA31A-1970, presented at American Geophysical Union Fall Meeting, San Francisco, California, 2012.

• "A method for improving time-stepping numerics in NWP models"
  Williams, P. D., 12th European Meteorological Society Annual Meeting & 9th European Conference on Applied Climatology, Łódź, Poland, 2012.

• "Climatic impacts of stochastic fluctuations in air–sea fluxes"
  Williams, P. D., 12th European Meteorological Society Annual Meeting & 9th European Conference on Applied Climatology, Łódź, Poland, 2012.

• "A method for improving time-stepping numerics"
  Williams, P. D., Canadian Meteorological and Oceanographic Society 46th Congress, joint with American Meteorological Society 21st Conference on Numerical Weather Prediction and 25th Conference on Weather Analysis and Forecasting, Montréal, Canada, 2012.

• "Climatic impacts of stochastic fluctuations in air–sea fluxes"
  Williams, P. D., Canadian Meteorological and Oceanographic Society 46th Congress, joint with American Meteorological Society 21st Conference on Numerical Weather Prediction and 25th Conference on Weather Analysis and Forecasting, Montréal, Canada, 2012.

• "The role of mean ocean salinity in climate"
  Williams, P. D., Guilyardi, E., Madec, G., Gualdi, S. and Scoccimarro, E., Canadian Meteorological and Oceanographic Society 46th Congress, joint with American Meteorological Society 21st Conference on Numerical Weather Prediction and 25th Conference on Weather Analysis and Forecasting, Montréal, Canada, 2012.

• "A method for improving time-stepping numerics"
  Williams, P. D., Geophysical Research Abstracts, 14(6090), 2012, presented at European Geosciences Union General Assembly, Vienna.

2011

• "Stochastic effects in comprehensive climate models (Invited)"
  Williams, P. D., Abstract NG52A-01, presented at American Geophysical Union Fall Meeting, San Francisco, California, 2011.

• "The importance of time-stepping errors in ocean models"
  Williams, P. D., Abstract OS21A-1615, presented at American Geophysical Union Fall Meeting, San Francisco, California, 2011.

• "Internal Inertio–Gravity Waves in the Laboratory: Mechanisms, Properties, and Impacts"
  Williams, P. D., Seventh International Symposium on Stratified Flows, Rome, Italy, 2011.

• "The importance of numerical time-stepping errors"
  Williams, P. D., Workshop on Hierarchical Modeling of Climate, International Centre for Theoretical Physics, Trieste, Italy, 2011.

• "Time-stepping errors in weather and climate models"
  Williams, P. D., Royal Meteorological Society Conference, University of Exeter, UK, 2011.

• "A simple yet effective time-stepping improvement"
  Williams, P. D., American Meteorological Society 18th Conference on Atmospheric and Oceanic Fluid Dynamics, Spokane, Washington, USA, 2011.

• "Testing the limits of quasi-geostrophic theory"
  Williams, P. D., Read, P. L. and Haine, T. W. N., American Meteorological Society 18th Conference on Atmospheric and Oceanic Fluid Dynamics, Spokane, Washington, USA, 2011.

• "The RAW Filter: An Improvement to the Robert–Asselin Filter"
  Williams, P. D., 9th International Short-Range Numerical Weather Prediction (SRNWP) Workshop on Nonhydrostatic Modelling, Bad Orb, Germany, 2011.

• "How to improve the leapfrog scheme in fluid models"
  Williams, P. D., Fourth meeting of the Wave–Flow Interactions Network, Cambridge, UK, 2011.

• "Stochastic parameterizations in comprehensive climate models (solicited)"
  Williams, P. D., Geophysical Research Abstracts, 13(12459), 2011, presented at European Geosciences Union General Assembly, Vienna.

• "Testing the limits of quasi-geostrophic theory"
  Williams, P. D., Read, P. L. and Haine, T. W. N., Geophysical Research Abstracts, 13(7931), 2011, presented at European Geosciences Union General Assembly, Vienna.

• "The effects of the RAW filter on the climatology and forecast skill of the SPEEDY model"
  Amezcua, J., Kalnay, E. and Williams, P. D., Geophysical Research Abstracts, 13(7593), 2011, presented at European Geosciences Union General Assembly, Vienna.

• "Gravity Waves in the Laboratory: Mechanisms, Properties, and Impacts"
  Williams, P. D., AGU Chapman Conference on Atmospheric Gravity Waves and Their Effects on General Circulation and Climate, Honolulu, Hawaii, 2011.

• "Internal Waves Emitted from Balanced Flow: Observations, Properties, and Consequences"
  Williams, P. D., Conference on Geophysical and Astrophysical Internal Waves, École de Physique des Houches, Chamonix, France, 2011.

2010

• "A new time-stepping method for regional climate models"
  Williams, P. D., Abstract A21G-0186, Fall Meeting Supplement, Eos, 91(52), 28 December 2010, presented at American Geophysical Union Fall Meeting, San Francisco, California.

• "The importance of numerical time-stepping errors"
  Williams, P. D., Uncertainty in Climate Prediction: Models, Methods and Decision Support workshop, Isaac Newton Institute for Mathematical Sciences, University of Cambridge, UK, 2010.

• "A simple time-stepping modification that could significantly improve ocean models"
  Williams, P. D., Challenger Society Ocean Modelling Group Meeting, National Oceanography Centre, Southampton, UK, 2010.

• "The impacts of stochastic noise on climate models"
  Williams, P. D., Stochastic Methods in Climate Modelling workshop, Isaac Newton Institute for Mathematical Sciences, University of Cambridge, UK, 2010.

• "A simple method to improve the time-stepping in atmosphere and ocean models"
  Williams, P. D., Oberwolfach Report 34/2010, pp 2091-2093, presented at Mathematisches Forschungsinstitut Oberwolfach workshop on Mathematical Theory and Modelling in Atmosphere–Ocean Science, Germany, 2010. doi:10.4171/OWR/2010/34

• "Is the thermohaline circulation sensitive to mean ocean salinity?"
  Williams, P. D., Guilyardi, E., Madec, G., Gualdi, S. and Scoccimarro, E., RAPID Climate Change Annual Science Meeting, Met Office, Exeter, UK, 2010.

• "A simple modification that could significantly improve GCM simulations"
  Williams, P. D., National Centre for Atmospheric Science Annual Conference, Manchester, UK, 2010.

• "Testing the limits of quasi-geostrophic theory"
  Williams, P. D., Third meeting of the Wave–Flow Interactions Network, University of St Andrews, UK, 2010.

• "Multiscale modelling of the climate system: Lessons from the laboratory (solicited)"
  Williams, P. D., Geophysical Research Abstracts, 12(439), 2010, presented at European Geosciences Union General Assembly, Vienna.

• "A simple modification that could significantly improve ocean models"
  Williams, P. D., Geophysical Research Abstracts, 12(425), 2010, presented at European Geosciences Union General Assembly, Vienna.

• "Testing the limits of quasi-geostrophic theory: application to observed laboratory flows outside the quasi-geostrophic regime"
  Williams, P. D., Read, P. L. and Haine, T. W. N., Geophysical Research Abstracts, 12(427), 2010, presented at European Geosciences Union General Assembly, Vienna.

• "Is the climate sensitive to mean ocean salinity?"
  Williams, P. D., Guilyardi, E., Madec, G., Gualdi, S. and Scoccimarro, E., Geophysical Research Abstracts, 12(431), 2010, presented at European Geosciences Union General Assembly, Vienna.

• "Quasi-geostrophic (QG) and non-QG equilibration of fully developed baroclinic instability"
  Simpson, J., Read, P., Moroz, I. and Williams, P. D., Geophysical Research Abstracts, 12(11883), 2010, presented at European Geosciences Union General Assembly, Vienna.

• "Boundary-layer instability in the rotating thermal annulus"
  Jacoby, T. N. L., Read, P. L., Williams, P. D. and Young, R. M. B., Geophysical Research Abstracts, 12(10517), 2010, presented at European Geosciences Union General Assembly, Vienna.

• "Severe high altitude aircraft turbulence on thunderstorm peripheries"
  McCann, D. W., Knox, J. A. and Williams, P. D., 14th American Meteorological Society Conference on Aviation, Range, and Aerospace Meteorology, Atlanta, Georgia, 2010.

2009

• "Can loss of balance from mesoscale eddies adequately power deep ocean mixing?"
  Williams, P. D., Haine, T. W. N. and Read, P. L., Abstract OS22A-08, Fall Meeting Supplement, Eos, 90(52), 29 December 2009, presented at American Geophysical Union Fall Meeting, San Francisco, California.

• "A new, simple, highly-accurate time-stepping method for weather and climate models"
  Williams, P. D., National Centre for Atmospheric Science Annual Conference, Oxford, 2009.

• "A new method for forecasting clear-air turbulence"
  Williams, P. D., Knox, J. A. and McCann, D. W., National Centre for Atmospheric Science Annual Conference, Oxford, 2009.

• "A proposed modification to the Robert–Asselin time filter"
  Williams, P. D., 8th International Short-Range Numerical Weather Prediction (SRNWP) Workshop on Nonhydrostatic Modelling, Bad Orb, Germany, 2009.

• "Application of the Lighthill–Ford Theory of Spontaneous Imbalance to Clear-Air Turbulence Forecasting"
  Williams, P. D., Knox, J. A. and McCann, D. W., European Meteorological Society 9th Annual Meeting and 9th European Conference on Applications of Meteorology (ECAM), Toulouse, France, 2009.

• "Inertia–Gravity Waves Emitted from Balanced Flow: Observations, Properties, and Consequences"
  Williams, P. D., Haine, T. W. N. and Read, P. L., European Meteorological Society 9th Annual Meeting and 9th European Conference on Applications of Meteorology (ECAM), Toulouse, France, 2009.

• "The role of mean ocean salinity in climate"
  Williams, P. D., Guilyardi, E., Madec, G., Gualdi, S. and Scoccimarro, E., European Meteorological Society 9th Annual Meeting and 9th European Conference on Applications of Meteorology (ECAM), Toulouse, France, 2009.

• "A proposed modification to the Robert–Asselin time filter"
  Williams, P. D., European Meteorological Society 9th Annual Meeting and 9th European Conference on Applications of Meteorology (ECAM), Toulouse, France, 2009.

• "Unresolved Processes in Weather and Climate Models: Lessons from the Laboratory"
  Williams, P. D., Focus Workshop on Dynamics and Statistics in Weather and Climate, Dresden, Germany, 2009.

• "The role of mean ocean salinity in climate"
  Williams, P. D., Guilyardi, E., Madec, G., Gualdi, S. and Scoccimarro, E., RAPID Climate Change Annual Science Meeting, University of Edinburgh, UK, 2009.

• "Inertia–Gravity Waves Emitted from Balanced Flow: Observations, Properties, and Consequences"
  Williams, P. D., Second meeting of the Wave–Flow Interactions Network, Edinburgh, UK, 2009.

• "Application of spontaneous imbalance theory to the problem of clear-air turbulence forecasting"
  Knox, J. A., McCann, D. W. and Williams, P. D., 17th American Meteorological Society Conference on Atmospheric and Oceanic Fluid Dynamics, Vermont, USA, 2009.

• "A proposed modification to the Robert–Asselin time filter"
  Williams, P. D., MOCA-09: IAMAS, IAPSO and IACS Joint Assembly, Montréal, Canada, 2009.

• "Can loss of balance from mesoscale eddies adequately power deep ocean mixing?"
  Williams, P. D., Haine, T. W. N. and Read, P. L., MOCA-09: IAMAS, IAPSO and IACS Joint Assembly, Montréal, Canada, 2009.

• "The role of mean ocean salinity in climate"
  Williams, P. D., Guilyardi, E., Madec, G., Gualdi, S. and Scoccimarro, E., MOCA-09: IAMAS, IAPSO and IACS Joint Assembly, Montréal, Canada, 2009.

• "Climatic impacts of stochastic air–sea fluxes in a coupled GCM"
  Williams, P. D., MOCA-09: IAMAS, IAPSO and IACS Joint Assembly, Montréal, Canada, 2009.

• "A new feedback on climate change from the hydrological cycle"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., MOCA-09: IAMAS, IAPSO and IACS Joint Assembly, Montréal, Canada, 2009.

• "A proposed modification to the Robert–Asselin time filter"
  Williams, P. D., Royal Meteorological Society Conference, University of Reading, UK, 2009.

• "The role of mean ocean salinity in climate"
  Williams, P. D., Guilyardi, E., Madec, G., Gualdi, S. and Scoccimarro, E., Royal Meteorological Society Conference, University of Reading, UK, 2009.

• "A new feedback on climate change from the hydrological cycle"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., Royal Meteorological Society Conference, University of Reading, UK, 2009.

• "A proposed modification to the Robert–Asselin time filter"
  Williams, P. D., Geophysical Research Abstracts, 11(352), 2009, presented at European Geosciences Union General Assembly, Vienna.

• "Inertia–Gravity Waves Emitted from Balanced Flow: Observations, Properties, and Consequences"
  Williams, P. D., Haine, T. W. N. and Read, P. L., Geophysical Research Abstracts, 11(286), 2009, presented at European Geosciences Union General Assembly, Vienna.

• "The role of mean ocean salinity in climate"
  Williams, P. D., Guilyardi, E., Madec, G., Gualdi, S. and Scoccimarro, E., Geophysical Research Abstracts, 11(285), 2009, presented at European Geosciences Union General Assembly, Vienna.

• "Climatic impacts of stochastic air–sea fluxes in a coupled GCM"
  Williams, P. D., Geophysical Research Abstracts, 11(316), 2009, presented at European Geosciences Union General Assembly, Vienna.

• "QUAGMIRE v1.3: a quasi-geostrophic model for investigating rotating fluids experiments"
  Williams, P. D., Haine, T. W. N., Read, P. L., Lewis, S. R. and Yamazaki, Y. H., Geophysical Research Abstracts, 11(278), 2009, presented at European Geosciences Union General Assembly, Vienna.

• "Baroclinic waves in the rotating annulus: a laboratory/model comparison"
  Williams, P. D., Read, P. L. and Haine, T. W. N., Geophysical Research Abstracts, 11(277), 2009, presented at European Geosciences Union General Assembly, Vienna.

• "A new feedback on climate change from the hydrological cycle"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., Geophysical Research Abstracts, 11(276), 2009, presented at European Geosciences Union General Assembly, Vienna.

• "On the Loss of Energy from the Ocean Mesoscale Flow via Inertia–Gravity Waves"
  Haine, T. W. N., Williams, P. D., Eyink, G. and Ring, D., Tenth Annual Center for Atmosphere Ocean Science (CAOS) Winter Workshop: Oceanography at the Observational and Modeling Frontier: Submesoscale Dynamics, Courant Institute of Mathematical Sciences, New York University, 2009.

• "A new feedback on climate change from the hydrological cycle"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., Workshop on Reducing the Uncertainty in the Prediction of Global Warming, The Institute for Advanced Studies, Jerusalem, 2009.

2008

• "Climatic impacts of stochastic air–sea fluxes in a coupled GCM"
  Williams, P. D., National Centre for Atmospheric Science Annual Conference, Bristol, UK, 2008.

• "A proposed modification to the Robert–Asselin time filter"
  Williams, P. D., National Centre for Atmospheric Science Annual Conference, Bristol, UK, 2008.

• "Rapid climate change: an overview for economists"
  Williams, P. D., ESF-FMSH-ES Conference on New Methodologies and Interdisciplinary Approaches in Global Change Research, Porquerolles Island, French Riviera, 2008.

• "Permit Holders Parking Only" (perspectives competition entry)
  Williams, P. D., The BA Festival of Science, Liverpool, 2008.

• "Sudden stratospheric warmings as noise-induced transitions"
  Birner, T. and Williams, P. D., SPARC 4th General Assembly, Bologna, Italy, 2008.

• "Stochastic physics across a hierarchy of weather and climate models"
  Williams, P. D., Pacific Institute for the Mathematical Sciences summer school workshop on Stochastic and Probabilistic methods for Atmosphere, Ocean, and Climate Dynamics, University of Victoria, Canada, 2008.

• "A new feedback on climate change from the hydrological cycle"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., RAPID Climate Change Annual Science Meeting, Cambridge University, UK, 2008.

• "Laboratory observations of inertia–gravity waves"
  Williams, P. D., Read, P. L. and Haine, T. W. N., Workshop on Teaching Weather and Climate Using Laboratory Experiments, Chicago, USA, 2008.

• "Can loss of balance from mesoscale eddies adequately power deep ocean mixing?"
  Williams, P. D., Haine, T. W. N. and Read, P. L., Geophysical Research Abstracts, 10(02057), 2008, presented at European Geosciences Union General Assembly, Vienna.

• "A new feedback on climate change from the hydrological cycle"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., Geophysical Research Abstracts, 10(02065), 2008, presented at European Geosciences Union General Assembly, Vienna.

• "A new direction in clear-air turbulence forecasting based on spontaneous imbalance. Part I: Application of theory"
  Knox, J. A., McCann, D. W. and Williams, P. D., Geophysical Research Abstracts, 10(02068), 2008, presented at European Geosciences Union General Assembly, Vienna.

• "A new direction in clear-air turbulence forecasting based on spontaneous imbalance. Part II: Case studies and statistical results"
  McCann, D. W., Knox, J. A. and Williams, P. D., Geophysical Research Abstracts, 10(02070), 2008, presented at European Geosciences Union General Assembly, Vienna.

• "Sudden stratospheric warmings as noise-induced transitions"
  Birner, T. and Williams, P. D., Geophysical Research Abstracts, 10(02079), 2008, presented at European Geosciences Union General Assembly, Vienna.

• "A calibrated, non-invasive method for measuring the internal interface height field at high resolution in the rotating, two-layer annulus"
  Williams, P. D., Read, P. L. and Haine, T. W. N., Geophysical Research Abstracts, 10(02087), 2008, presented at European Geosciences Union General Assembly, Vienna.

• "Generation and propagation of inertia–gravity waves within baroclinic wave flows in thermally-driven, rotating annulus experiments"
  Read, P. L., Jacoby, T., Young, R. M. B., Randriamampianina, A., Maubert, P., Früh, W.-G., Williams, P. D. and Haine, T. W. N., Geophysical Research Abstracts, 10(05237), 2008, presented at European Geosciences Union General Assembly, Vienna.

• "A new feedback on climate change from the hydrological cycle"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., British Council China/UK Workshop on Modelling Climate Variability and Change, Met Office, Exeter, 2008.

• "A new feedback on climate change from the hydrological cycle"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., New Advances in Geophysics: Geophysics of Global Climate Change, London, 2008.

• "A new direction in clear-air turbulence forecasting based on spontaneous imbalance. Part I: Application of theory"
  Knox, J. A., McCann, D. W. and Williams, P. D., 13th American Meteorological Society Conference on Aviation, Range and Aerospace Meteorology, New Orleans, Louisiana, 2008.

• "A new direction in clear-air turbulence forecasting based on spontaneous imbalance. Part II: Case studies and statistical results"
  McCann, D. W., Knox, J. A. and Williams, P. D., 13th American Meteorological Society Conference on Aviation, Range and Aerospace Meteorology, New Orleans, Louisiana, 2008.

2007

• "A new feedback on climate change from the hydrological cycle"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., National Centre for Atmospheric Science Annual Conference, York, UK, 2007.

• "Spontaneous Gravity Wave Generation and its Operational Forecasting Implications"
  McCann, D. W., Knox, J. A. and Williams, P. D., 32nd Annual Meeting of the National Weather Association, Reno, Nevada, 2007.

• "Sudden Stratospheric Warmings as Noise-Induced Transitions"
  Birner, T. and Williams, P. D., AGU Chapman Conference on the Role of the Stratosphere in Climate and Climate Change, Santorini, Greece, 2007.

• "Plötzliche Stratosphärenerwärmungen als rauschinduzierte Übergänge"
  Birner, T. and Williams, P. D., Deutsch-Österreichisch-Schweizerischen Meteorologen-Tagung DACH 2007, Hamburg, Germany, 2007.

• "A new feedback on climate change from the hydrological cycle"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., RAPID Climate Change Annual Science Meeting, Plymouth, UK, 2007.

• "Climate and the hydrological cycle"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., Ocean Controls in Abrupt Climate Change, European Science Foundation research conference, Universitätszentrum Obergurgl, Innsbruck, Austria, 2007.

• "A new feedback on climate change from the hydrological cycle"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., 3rd IPSL/NCAS Workshop on Tropical Variability, Université Paris VI, France, 2007.

• "Noise-induced phenomena in low-order stratospheric dynamics"
  Williams, P. D., Birner, T. and Shepherd, T. G., Stochastic Dynamical Systems and Climate Modeling, Banff International Research Station, Alberta, Canada, 2007.

• "On the loss of energy from the ocean mesoscale flow via slaved inertia–gravity waves"
  Haine, T. W. N., Williams, P. D., Eyink, G. and Ring, D., 16th AMS Conference on Atmospheric and Oceanic Fluid Dynamics, Santa Fe, New Mexico, USA, 2007.

• "On the origin of inertia–gravity waves emitted by quasi-balanced flow"
  Haine, T., Eyink, G., Williams, P., Ring, D. and Read, P., Geophysical Research Abstracts, 9(09261), 2007, presented at European Geosciences Union General Assembly, Vienna.

• "A new feedback on climate change from the hydrological cycle"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., SET for BRITAIN reception at the House of Commons for Britain's top early-stage researchers, London, 2007.

2006

• "The impact of salinity on the thermohaline circulation in a warmer climate"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., Rapid Climate Change International Science Conference, Birmingham, 2006.

• "Inertia–gravity waves emitted spontaneously from quasi-balanced flow: properties and consequences"
  Williams, P. D., Haine, T. W. N. and Read, P. L., Oberwolfach Reports, 3(3), pp 2362-2364, 2006, presented at Mathematisches Forschungsinstitut Oberwolfach workshop on Mathematical Theory and Modelling in Atmosphere–Ocean Science, Germany, 2006. doi:10.4171/OWR/2006/39

• "Observations and consequences of spontaneously-emitted inertia–gravity waves from quasi-balanced flow"
  Williams, P. D., Haine, T. W. N. and Read, P. L., Spontaneous Imbalance Workshop #1: Perspectives from atmospheric and oceanic dynamics, University of Washington, Seattle, USA, 2006.

• "Spontaneous imbalance and new directions in Clear Air Turbulence forecasting"
  Knox, J. A., Ellrod, G. P., Pryor, K., McCann, D. W. and Williams, P. D., Spontaneous Imbalance Workshop #1: Perspectives from atmospheric and oceanic dynamics, University of Washington, Seattle, USA, 2006.

• "The role of salinity in the climate response to an intensified water cycle"
  Williams, P. D., Guilyardi, E., Sutton, R., Gregory, J. and Madec, G., U.S. CLIVAR Salinity Workshop, Woods Hole Oceanographic Institution, USA, 2006.

• "A new feedback from the hydrological cycle on the rate of global warming"
  Williams, P. D., Guilyardi, E., Sutton, R., Gregory, J. and Madec, G., NEMO Users Meeting, Université Paris VI, France, 2006.

• "Experimental observations of spontaneously-emitted gravity waves: a challenge for theorists"
  Williams, P. D., Haine, T. W. N. and Read, P. L., Geophysical Research Abstracts, 8(04254), 2006, presented at European Geosciences Union General Assembly, Vienna.

• "Modelling climate change: the role of unresolved processes"
  Williams, P. D., Geophysical Research Abstracts, 8(04318), 2006, presented at European Geosciences Union General Assembly, Vienna.

• "A new feedback from the hydrological cycle on the rate of climate change"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., Geophysical Research Abstracts, 8(04363), 2006, presented at European Geosciences Union General Assembly, Vienna.

• "Spontaneous emission of inertia–gravity waves from rotating, stratified flow"
  Haine, T. W. N., Williams, P. D., Ring, D. and Read, P. L., AGU Ocean Sciences Meeting, Honolulu, Hawaii, 2006.

• "Rapid climate change and intergenerational inequity"
  Williams, P. D., Green Economics Institute conference, Mansfield College, Oxford University, UK, 2006.

• "Improved clear air turbulence diagnostics based on adjustment dynamics"
  Knox, J. A., Ellrod, G. P. and Williams, P. D., 12th AMS Conference on Aviation Range and Aerospace Meteorology, Atlanta, Georgia, 2006.

2005

• "Tropical Pacific ocean adjustment to changes in the hydrological cycle in a coupled ocean–atmosphere model"
  Williams, P. D., Guilyardi, E., Sutton, R., Gregory, J. and Madec, G., Royal Meteorological Society Conference, University of Exeter, UK, 2005.

• "Tropical Pacific ocean adjustment to changes in the hydrological cycle"
  Williams, P. D., Guilyardi, E., Sutton, R., Gregory, J. and Madec, G., 2nd RAPID Climate Change annual science meeting, University of Swansea, UK, 2005.

• "Spontaneous generation of inertia–gravity waves in a rotating stratified flow"
  Haine, T. W. N., Williams, P. D., Read, P. L., 15th AMS Conference on Atmospheric and Oceanic Fluid Dynamics, Cambridge, MA, USA, 2005.

• "Tropical Pacific ocean adjustment to changes in the hydrological cycle in a coupled ocean–atmosphere model"
  Williams, P. D., Guilyardi, E., Sutton, R. T., Gregory, J. M. and Madec, G., Geophysical Research Abstracts, 7(05410), 2005, presented at European Geosciences Union 2nd General Assembly, Vienna.

2004

• "Nonlinear interactions of inertia–gravity modes and planetary waves in rotating fluid flows"
  Haine, T. W. N., Williams, P. D., Read, P. L., 25th IUGG Conference on Mathematical Geophysics: Frontiers in Theoretical Earth Sciences, Columbia University, New York, USA, 2004.

• "The spatial and temporal characteristics of the adjustment of the thermohaline circulation, in response to the removal of surface freshwater forcing in a coupled general circulation model"
  Williams, P. D., Guilyardi, E., Sutton, R., Gregory, J. and Madec, G., World Climate Research Programme CLIVAR Workshop on North Atlantic Thermohaline Circulation Variability, Kiel University, Germany, 2004.

• "Multiple jet formation in a convectively driven flow on a beta-plane"
  Read, P. L., Yamazaki, Y. H., Lewis, S. R., Williams, P. D., Miki-Yamazaki, K., Sommeria, J., Didelle, H. and Fincham, A., XXIst International Congress of Theoretical and Applied Mechanics, Warsaw, Poland, 2004.

• "A coupled GCM study of the evolution of the ocean circulation, following a suppression of the exchange of freshwater with the atmosphere"
  Williams, P. D., Guilyardi, E., Sutton, R., Gregory, J. and Madec, G., UK Universities Global Atmospheric Modelling Programme annual conference, Oxford University, UK, 2004.

• "The role of salinity in the thermohaline circulation, and in its response to changes in the surface freshwater flux"
  Williams, P. D., Guilyardi, E., Sutton, R., Gregory, J. and Madec, G., 1st RAPID Climate Change annual science meeting, University of Nottingham, UK, 2004.

2003

• "A joint experimental/numerical study of the baroclinic/inertia–gravity wave interaction"
  Williams, P. D., Haine, T. W. N. and Read, P. L., Geophysical Research Abstracts, 5(12352), 2003, presented at European Geophysical Society — American Geophysical Union — European Union of Geosciences Joint Assembly, Nice, France.

• "Large-scale experimental study of the formation of zonal jets in convectively-driven geostrophic turbulence on a beta-plane"
  Read, P. L., Lewis, S. R., Williams, P. D., Yamazaki, Y., Yamazaki, K., Sommeria, J., Fincham, A. and Didelle, H., Geophysical Research Abstracts, 5(02880), 2003, presented at European Geophysical Society — American Geophysical Union — European Union of Geosciences Joint Assembly, Nice, France.

2001

• "The role of non-hydrostatic dynamics in controlling exchange across a surface ocean front"
  Haine, T. W. N., Williams, P. D. and Marshall, J. C., Geophysical Research Abstracts, 3(2885), 2001, presented at European Geophysical Society XXVIth General Assembly, Nice, France.

• "Interactions of fast and slow modes in rotating, stratified flows"
  Williams, P. D., Read, P. L. and Haine, T. W. N., Geophysical Research Abstracts, 3(5629), 2001, presented at European Geophysical Society XXVIth General Assembly, Nice, France.