Atmospheric Chemistry and Physics
www.atmos-chem-phys.net
1680-7316
1680-7324
5
1
2005
10.5194/acp-5-131-2005
http://www.atmos-chem-phys.net/5/131/2005/
http://www.atmos-chem-phys.net/5/131/2005/acp-5-131-2005.html
http://www.atmos-chem-phys.net/5/131/2005/acp-5-131-2005.pdf
131
138
2005-01-21
Vortex-averaged Arctic ozone depletion in the winter 2002/2003
T. Christensen
B. M. Knudsen
M. Streibel
S. B. Andersen
A. Benesova
G. Braathen
H. Claude
J. Davies
H. De Backer
H. Dier
V. Dorokhov
M. Gerding
M. Gil
B. Henchoz
H. Kelder
R. Kivi
E. Kyrö
Z. Litynska
D. Moore
G. Peters
P. Skrivankova
R. Stübi
T. Turunen
G. Vaughan
P. Viatte
A. F. Vik
P. von der Gathen
I. Zaitcev
Danish Meteorological Institute, Copenhagen, Denmark
Alfred Wegener Institute for Polar and Marine Research,Potsdam, Germany
Czech Hydrometeorological Institute, Prague, Czech Republic
Norwegian Institute for Air Research, Kjeller, Norway
Deutscher Wetterdienst, Hohenpeißenberg, Germany
Environment Canada, Downsview, Ontario, Canadany
Royal Meteorological Institute, Brussels, Belgium
Deutscher Wetterdienst, Lindenberg, Germany
Central Aerological Observatory, Dolgoprudny, Moscow Region, Russia
Leibniz-Institue of Atmospheric Physics, Kühlungsborn, Germany
Instituto Nacional de Téchnica Aerospacial, Madrid, Spain
MeteoSwiss, Payerne, Switzerland
Royal Netherlands Meteorological Institute, De Bilt, Netherlands
Finnish Meteorological Institute, Sodankylä, Finland
IMWM, Centre of Aerology, Legionowo, Poland
UK Met Office, Exeter, UK
University of Wales, Aberystwyth, UK
A total ozone depletion of 68±7 Dobson units
between 380 and 525K from 10 December 2002 to 10 March 2003 is derived
from ozone sonde data by the vortex-average method, taking into account
both diabatic descent of the air masses and transport of air into the vortex.
When the vortex is divided into three equal-area regions, the results are
85±9DU for the collar region (closest to the edge), 52±5DU
for the vortex centre and 68±7DU for the middle region in between
centre and collar.
<P style="line-height: 20px;">
Our results compare well with other studies: We find good agreement with
ozone loss deduced from SAOZ data, with results inferred from POAM III
observations and with results from tracer-tracer correlations using
HF as the long-lived tracer. We find a higher ozone loss than
that deduced by tracer-tracer correlations using CH<sub>4</sub>.
<P style="line-height: 20px;">
We have made a careful comparison with Match results: The results were
recalculated using a common time period, vortex edge definition and
height interval. The two methods generally compare very well, except
at the 475K level which exhibits an unexplained discrepancy.