Research

I am a Lecturer in the Department of Meteorology at the University of Reading.  I study atmospheric convection, tropical weather and tropical climate.   I am particularly interested in the interaction between convection and larger-scale fields and the organization of convection, including the vertical structure of temperature and moisture at various spatial scales. A related interest is the non-linear relationship between column water vapour and precipitation and how this relationship relates to distributions of convective clusters and the temporal evolution of convective systems.  I'm also involved in efforts to improve the way current global weather and climate models represent convection.

I was an independent NERC Postdoctoral Research Fellow in NCAS-Climate at the University of Reading Department of Meteorology from May 2012-April 2015.  My fellowship project, titled "The Organization of Tropical Rainfall," sought to identify the processes that lead to convective self-aggregation (spontaneous clustering) in idealized high-resolution model simulations and to explore the extent to which they are important for convective organization in the real world. This has implications for phenomena including the Madden-Julian Oscillation (MJO) and tropical cyclones, which are among my broader research interests.

I was a postdoc at the University of Reading Department of Meteorology from July 2008-May 2012, working with Steve Woolnough on the Cascade project, a part of NCAS-Climate. Cascade aimed to better understand the organization of tropical convection at many scales using the UK Met Office Unified Model (UM) at resolutions as high as 1.5 km and domains spanning several thousand km across. The main focus of my work has been to study the differences between explicit and parameterized convection for simulations of the same case studies. Our work investigating the improved distribution of precipitation in the expicit convection runs can be found in:

Holloway, C. E., S. J. Woolnough, and G. M. S. Lister, 2012: Precipitation distributions for explicit versus parameterized convection in a large-domain high-resolution tropical case study. Q. J. Roy. Meteorol. Soc., 138, 1692-1708.

The two-part study of the effects of explicit convection on simulations of an MJO case (one of the Year of Tropical Convection, or YOTC, cases) can be found in the following two papers:

Holloway, C. E., S. J. Woolnough, and G. M. S. Lister, 2013: The effects of explicit versus parameterized convection on the MJO in a large-domain high-resolution tropical case study. Part I: Characterization of large-scale organization and propagation.  J. Atmos. Sci., 70, 1342-1369.

Holloway, C. E., S. J. Woolnough, and G. M. S. Lister, 2015: The effects of explicit versus parameterized convection on the MJO in a large-domain high-resolution tropical case study. Part II: Processes leading to differences in MJO development.  J. Atmos. Sci., in press.  (AMS early online release)

I did my Ph.D. work with David Neelin at the Department of Atmos. and Oc. Sci. at UCLA. My Ph.D. dissertation sought to determine how many vertical degrees of freedom are necessary to characterize temperature and moisture in the tropical atmosphere, especially on General Circulation Model (GCM) gridbox space and time scales and larger.  Assumptions of simple vertical structure made by the quasi-equilibrium tropical circulation model (QTCM) were tested in various observational sources.  A broader motivation was to better understand climate variability and change, both in observations and in GCM simulations.

Most of my Ph.D. work is summarized in the following three articles:

Holloway, C. E. and J. D. Neelin, 2010: Temporal relations of column water vapor and tropical precipitation. J. Atmos. Sci., 67, 10911105, doi: 10.1175/2009JAS3284.1.  Paper (AMS Page)

Holloway, C. E. and J. D. Neelin, 2009: Moisture vertical structure, column water vapor, and tropical deep convection. J. Atmos. Sci., 66, 1665-1683.  Paper (AMS Page)

Holloway, C. E. and J. D. Neelin, 2007: The convective cold top and quasi equilibrium. J. Atmos. Sci., 64, 1467-1487. Preprint (PDF)

Also check out the page for the UK consortium project I was part of: Cascade

And the page for my Ph.D. advisor's UCLA research group: Climate Systems Interactions Group (CSI).

My other publications and talks can be found at: Publications.

My Ph.D. Dissertation is posted at: Dissertation




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