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Ozone loss episodes in the free Antarctic troposphere, suggesting a possible climate feedback
Author(s) -
Roscoe H. K.,
Kreher K.,
Friess U.
Publication year - 2001
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 - 10.1029/2000gl012583
Subject(s) - troposphere , environmental science , climatology , ozone , atmospheric sciences , sea ice , ozone depletion , boundary layer , submarine pipeline , ozone layer , spring (device) , oceanography , geology , meteorology , stratosphere , geography , mechanical engineering , physics , engineering , thermodynamics
Sudden loss of tropospheric ozone well above the boundary layer was observed on three occasions at two coastal sites in Antarctica in spring 1995. Back trajectories show that the air sampled the boundary layer near the northern edge of the sea ice (1000 km from the coast) between 3 and 5 days previously. Enhanced BrO observed over sea ice in spring suggests that such ozone loss is common offshore, hence it may cause a small climate effect whose sign would create positive feedback, if sea ice reduced during warming.