NERC upper troposphere, lower stratosphere ozone programme The University of Reading




Intercontinental Transport of Ozone and its Precursors -

Forecast Trajectories
 
ITOP Plots of the Day
Selected plots are posted here daily by the ITOP-UK group. They are intended as discussion points for flight planning purposes.
Posted 3/6/04.

Plots showing forward trajectories from the DC8 planned track for 3/6/04.
Trajectory release between 19:34 UT and 21:00 UT when the DC8 flies at low levels along 50N.
Trajectory release between 21:20 UT and 00:45 UT when the DC8 flies south to 35N and then in BL to New York.
The proposed flight track of the DC8 today.
Figure 1
Fig.1: Showing isoprene emissions tracer at 925 hPa 12 UT 3/6/04 (using DF back trajs from the US domain). The feature to the SE is relatively weaker in NOx, indicating biogenic influence.

Figure 2
Fig.2: Section along the dashed line in Fig.1 showing isoprene emissions tracer.

Figure 3
Fig.3: Section along the dashed line in Fig.1 showing closest approach to Horta. Note how polluted air trajectories pass close to Azores.

Figure 4
Fig.4: Section along the dashed line in Fig.1 showing closest approach to Creil. Note the mutual exclusivity between air passing near the Azores and that heading for W. Europe (i.e., lack of 3-point opportunities).

Figure 5
Fig.5: Forward trajectories (7 days) from the crosses in the sections.
Plots showing forward trajectories from the P3 planned track for 2/6/04.
Trajectory release between 14:00 UT and 17:15 UT when the P3 flies between Pease over Quebec to Lagrangian opportunity (blue trajs).
Trajectory release between 17:15 UT and 20:00 UT when the P3 flies from Lagrangian opportunity to low level European pollution.
The proposed flight track of the P3 2/6/04.

Plots showing forward trajectories from the DC8 track on 29/5/04.
Trajectory release between 13:00 UT and 15:00 UT when the DC8 flew at 1000ft through US pollution. Trajectory endpoints at 06UT 1/6/04.
Trajectory release between 13:00 UT and 15:00 UT when the DC8 flew at 1000ft through US pollution. Trajectory endpoints at 18UT 2/6/04.
The proposed flight track of the DC8 on Saturday 29/5/04.


Previous plots of the day
Posted 26/5/04
Posted 27/5/04
Posted 28/5/04
Posted 2/6/04
Posted 3/6/04


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Dr. John Methven,
Department of Meteorology,
University of Reading,
Earley Gate, PO Box 243,
Reading, RG6 6BB, UK.
Tel: +44 (0) 118 931 6721
Fax: +44 (0) 118 931 8905 		Questions to
J.Methven@reading.ac.uk