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Atmospheric response to NO y source due to energetic electron precipitation
Author(s) -
Rozanov E.,
Callis L.,
Schlesinger M.,
Yang F.,
Andronova N.,
Zubov V.
Publication year - 2005
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 - 10.1029/2005gl023041
Subject(s) - stratosphere , middle latitudes , atmospheric sciences , latitude , precipitation , mixing ratio , environmental science , polar , ozone , climatology , tropics , ozone depletion , meteorology , geology , physics , geodesy , astronomy , fishery , biology
We have introduced additional NO y sources caused by energetic electron precipitation (EEP) during 1987 into a Chemistry‐Climate model. Comparison of two model runs with and without EEP reveals increase of reactive nitrogen by about 2 ppbv in the middle stratosphere over the tropical and middle latitudes. In the upper stratosphere over the polar winter regions the simulated NO y enhancement reaches 10 ppbv. Decreases of the ozone mixing ratio in the stratosphere by up to 5% over midlatitudes and up to 30% over southern high‐latitudes are calculated. A ∼0.5 K cooling in the middle stratosphere over the tropics and up to 2 K over southern high‐latitudes is calculated with detectable changes in the surface air temperatures. These results confirm that the magnitude of the atmospheric response to EEP events can potentially exceed the effects from solar UV fluxes. These mechanisms work in phase outside polar latitudes, but can compensate each other within polar latitudes.