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Severe ozone depletion in the cold Arctic winter 2004–05
Author(s) -
von Hobe M.,
Ulanovsky A.,
Volk C. M.,
Grooß J.U.,
Tilmes S.,
Konopka P.,
Günther G.,
Werner A.,
Spelten N.,
Shur G.,
Yushkov V.,
Ravegnani F.,
Schiller C.,
Müller R.,
Stroh F.
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2006gl026945
Subject(s) - stratosphere , ozone , ozone depletion , polar vortex , arctic , atmospheric sciences , environmental science , water vapor , chlorine , climatology , polar , the arctic , ozone layer , halogen , oceanography , chemistry , meteorology , geology , physics , alkyl , organic chemistry , astronomy
During a flight of the M55 Geophysica into the Arctic polar vortex on 7 March 2005, ozone, halogen species, tracers and water vapor were measured. Up to 90% chlorine activation and up to 60% ozone loss were found above 14 km, reflecting the low temperatures and extensive PSC formation prevalent in the Arctic stratosphere over the 2004/05 winter. Observations are generally well reproduced by CLaMS model simulations. The observed levels of active chlorine can only be reproduced by assuming significant denitrification of about 70%. Moderate dehydration up to 0.5 ppm is observed in some locations. We deduce a partial column ozone loss of 62 (+8/−17) DU below 19 km on 7 March.