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Solar cycle modulation of the Arctic Oscillation in a chemistry‐climate model
Author(s) -
Tourpali K.,
Schuurmans C. J. E.,
van Dorland R.,
Steil B.,
Brühl C.,
Manzini E.
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 - 10.1029/2005gl023509
Subject(s) - oscillation (cell signaling) , stratosphere , climatology , climate model , atmospheric sciences , arctic oscillation , modulation (music) , north atlantic oscillation , general circulation model , environmental science , solar cycle , arctic , troposphere , climate change , physics , chemistry , geology , oceanography , plasma , biochemistry , quantum mechanics , northern hemisphere , acoustics , solar wind
The structural modulation of the Arctic Oscillation (AO) induced by a realistic enhancement of the ultraviolet (UV) radiation associated with the 11‐year solar cycle is investigated with a coupled Chemistry‐Climate Model. It has been found that the main features of the modulation are an eastward shift of the surface Atlantic center of action into Europe and a vertical extension into the stratosphere in solar maximum conditions. These model results are in good agreement with observational results in the North Atlantic Oscillation (NAO) centers of action. Confirmation of the modulation effect of solar activity on the NAO spatial structure by a Chemistry‐Climate Model simulation gives support to the occurrence of a real solar effect on the tropospheric circulation.