University of Leeds

SLIMCAT 3D Model

SLIMCAT

Modelling for EU THESEO-2000  and NASA SOLVE Campaigns

THESEO-2000 is an EU-funded measurement programme taking place in the northern hemisphere during winter 1999/2000. More details can be found on the THESEO-2000 Home Page .

This page contains preliminary results from simulations with the SLIMCAT 3D model . The model was integrated from November 1, 1999 at a horizontal resolution of 2.5 x 3.75 degrees and was initialised from a lower resolution run started in 1991.

This work at Leeds is funded by the U.K. Natural Environment Research Council , Natural Environment Research Council UTLS programme and the European Union.

Preliminary Model Results

This page contains recent, preliminary SLIMCAT model results for winter 1999/2000. Contact me for more details and requests.

Some more diagnostics from a similar SLIMCAT CTM experiment for this winter are available at the University of Cambridge .

1. Movie of O3 Loss at 475 K

Here is an animation of active chlorine and O3 loss near 18 km during winter 1999/2000. (Use your Reload button to replay the movie). Details of movie. Cold temperatutres caused large chlorine activation in December. O3 loss then occurs in these activated air masses in sunlight, hence the modelled O3 loss is initially greatest at the vortex edge.

2. Maps at 475 K

December 1999
1 2 3a 3b 4 5a 5b 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27a 27b 28 29 30
31
January 2000
1a 1b 2 3 4 5 6a 6b 7 8 9 10
11a 11b 12a 12b 13a 13b 14a 14b 15a 15b 16a 16b 17a 17b 18a 18b 19 20a 20b
21a 21b 22 23a 23b 24 25 26a 26b 27 28 29 30
31a 31b
February 2000
1 2 3 4 5a 5b 6 7 8 9 10a 10b
11 12 13 14 15a 15b 16 17 18 19 20a 20b
21 22 23 24 25 26a 26b 27a 27b 28a 28b 29a 29b
March 2000
1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b
11a 11b 12a 12b 13a 13b 14a 14b 15 16a 16b 17 18 19 20
21a 21b 22 23 24 25 26a 26b 27 28 29 30
31a 31b

3. Profiles at Kiruna

December 1999
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31
January 2000
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31

For more information contact Martyn Chipperfield: martyn@env.leeds.ac.uk