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Cryosphere-Atmosphere Interaction Related to Variability and Change of Northern Hemisphere Annular Mode

Domenii publicaţii > Ştiinţele pământului şi planetare + Tipuri publicaţii > Capitol de carte

Autori: Bojariu, R., R. Garcia-Herrera, L. Gimeno, T. Zhang, and O. W. Frauenfeld

Editorial: L. Gimeno, R. García-Herrera, R. M. Trigo , Wiley-Blackwell, Trends and Directions in Climate Research: Ann. N.Y. Acad. Sci., 1146, p.50-59, 2008.


The Northern Hemisphere annular mode, also known as the Arctic Oscillation/North Atlantic Oscillation (AO/NAO) is a dominant atmospheric mode in the Northern Hemisphere winter that influences climate fluctuations from the eastern seaboard of the United States to Siberia and from the Arctic to the subtropical Atlantic. After almost a century of scientific investigation, the fundamental mechanisms determining the evolution of the AO/NAOare not yet completely understood. The ocean is favored as the most likely forcing of atmospheric variability, given the time scales of oceanic circulation and its large heat capacity. Our analyses of snow cover, soil temperatures, zonal winds, and geopotential heights identify the effect of land-atmosphere interaction over Eurasia on Northern Hemisphere atmospheric circulation, explaining the predictive signal that links fluctuations of April-October snow cover with the following winter AO/NAO phases.

Cuvinte cheie: North Atlantic Oscillation; Arctic Oscillation; snow cover