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Ozone destruction and production rates between spring and autumn in the Arctic stratosphere
Author(s) -
Fahey D. W.,
Gao R. S.,
Del Negro L. A.,
Keim E. R.,
Kawa S. R.,
Salawitch R. J.,
Wennberg P. O.,
Hanisco T. F.,
Lanzendorf E. J.,
Perkins K. K.,
Lloyd S. A.,
Swartz W. H.,
Proffitt M. H.,
Margitan J. J.,
Wilson J. C.,
Stimpfle R. M.,
Cohen R. C.,
McElroy C. T.,
Webster C. R.,
Loewenstein M.,
Elkins J. W.,
Bui T. P.
Publication year - 2000
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 - 10.1029/2000gl011404
Subject(s) - stratosphere , ozone , atmospheric sciences , arctic , ozone depletion , environmental science , spring (device) , the arctic , climatology , meteorology , geography , oceanography , geology , physics , thermodynamics
In situ measurements of radical and long‐lived species were made in the lower Arctic stratosphere (18 to 20 km) between spring and early autumn in 1997. The measurements include O 3 , ClO, OH, HO 2 , NO, NO 2 , N 2 O, CO, and overhead O 3 . A photochemical box model constrained by these and other observations is used to compute the diurnally averaged destruction and production rates of O 3 in this region. The rates show a strong dependence on solar exposure and ambient O 3 . Total destruction rates, which reach 19%/month in summer, reveal the predominant role of NO x and HO x catalytic cycles throughout the period. Production of O 3 is significant only in midsummer air parcels. A comparison of observed O 3 changes with destruction rates and transport effects indicates the predominant role of destruction in spring and an increased role of transport by early autumn.