Atmospheric Circulation Regimes in a Nonlinear Quasi-Geostrophic Modelстатья
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Дата последнего поиска статьи во внешних источниках: 7 сентября 2016 г.
Аннотация:Atmospheric low-frequency variability and circulation regime behavior are investigated in the context of a quasi-geostrophic (QG) three-level T63 model of the wintertime atmospheric circulation over the Northern Hemisphere (NH).Themodel generates strong interannual and decadal variability, with the domination of the annularmode of variability. It successfully reproduces a satisfactory model climatology and themost important atmospheric circulation regimes. The positive phase of the Arctic Oscillation is a robust feature of the quasi-geostrophic T63 model.The model results based on QG dynamics underlie atmospheric regime behavior in the
extratropical NH and suggest that nonlinear internal processes deliver significant contribution to the atmospheric climate variability on interannual and decadal timescales.