Ozone loss derived from balloon-borne tracer measurements and the SLIMCAT CTM

A. D. Robinson (1) , G. A. Millard (1) , F. Danis (1) , M. Guirlet (1) , N. R. P. Harris (1) , A. M. Lee (1) , J. D. Mcintyre (1) , J. A. Pyle (1, 2) , J. Arvelius (3) , S. Dagnesjo (3) , S. Kirkwood (3) , Hans Nilsson (3) , D. W. Toohey (4) , T. Deshler (5) , Florence Goutail (6) , Jean-Pierre Pommereau (6) , J. W. Elkins (7) , F. Moore (7) , E. Ray (7) , U. Schmidt (8) , A. Engel (8) , M. Mueller (8)

1 Centre for Atmospheric Science [Cambridge, UK]
2 ACMSU - Atmospheric Chemistry Modelling Support Unit [Cambridge]
3 IRF - Swedish Institute of Space Physics [Kiruna]
4 AOS Program - Atmospheric and Oceanic Sciences Program [Princeton]
5 Department of Atmospheric Science [Laramie]
6 SA - Service d'aéronomie
7 CMDL - NOAA Climate Monitoring and Diagnostics Laboratory
8 Goethe-Universität Frankfurt am Main

Balloon-borne measurements of CFC-11 (on flights of the DIRAC in situ gas chromatograph and the DESCARTES grab sampler), ClO and O₃ were made during the 1999/2000 winter as part of the SOLVE-THESEO 2000 campaign. Here we present the CFC-11 data from nine flights and compare them first with data from other instruments which flew during the campaign and then with the vertical distributions calculated by the SLIMCAT 3-D CTM. We calculate ozone loss inside the Arctic vortex between late January and early March using the relation between CFC-11 and O₃ measured on the flights, the peak ozone loss (1200 ppbv) occurs in the 440–470 K region in early March in reasonable agreement with other published empirical estimates. There is also a good agreement between ozone losses derived from three independent balloon tracer data sets used here. The magnitude and vertical distribution of the loss derived from the measurements is in good agreement with the loss calculated from SLIMCAT over Kiruna for the same days.

Domaines: Océan, Atmosphère

A. D. Robinson, G. A. Millard, F. Danis, M. Guirlet, N. R. P. Harris, et al.. Ozone loss derived from balloon-borne tracer measurements and the SLIMCAT CTM. Atmospheric Chemistry and Physics Discussions, 2004, 4 (6), pp.7089-7120. ⟨hal-00327920⟩