2000 journal article

Ozone destruction and production rates between spring and autumn in the Arctic stratosphere

Geophysical Research Letters, 27(17), 2605–2608.

By: D. Fahey*, R. Gao*, L. Negro, E. Keim*, S. Kawa*, R. Salawitch*, P. Wennberg*, T. Hanisco* ...

co-author countries: Canada 🇨🇦 United States of America 🇺🇸
Source: ORCID
Added: December 17, 2020

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.