Sensitivities of zonal mean atmospheric circulation to SST warming in an aqua-planet model

被引：70

作者：

Chen, Gang ^{[1
]}

Plumb, R. Alan ^{[2
]}

Lu, Jian ^{[3
,4
]}

机构：

[1] Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY 14853 USA

[2] MIT, Program Atmospheres Oceans & Climate, Cambridge, MA 02139 USA

[3] Ctr Ocean Land Atmosphere Studies, Calverton, MD 20705 USA

[4] George Mason Univ, Dept Atmospher Ocean & Earth Sci, Fairfax, VA 22030 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2010年 / 37卷

关键词：

BREWER-DOBSON CIRCULATION; SURFACE WESTERLIES; PART II; CLIMATE; LATITUDE;

D O I：

10.1029/2010GL043473

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Sensitivities of tropospheric winds and stratospheric Brewer-Dobson Circulation (BDC) to SST warming are explored in an aqua-planet atmospheric general circulation model. The tropospheric zonal wind change is quite sensitive to the location and sign of the gradient of SST perturbations with respect to the climatological jet. For the experiments with low latitude warming, the Hadley cell is intensified in the deep tropics, yet the Hadley cell boundary contracts for narrow meridional extents of warming and expands for broad extents of warming, associated with changes in extratropical eddy-driven winds. Despite the complex changes of tropospheric wave forcing, the strength of the BDC is increased for all the experiments with low latitude warming. For the experiments with high latitude warming, the strength of the BDC decreases only if the warming extending to the subtropics. Citation: Chen, G., R. A. Plumb, and J. Lu (2010), Sensitivities of zonal mean atmospheric circulation to SST warming in an aqua-planet model, Geophys. Res. Lett., 37, L12701, doi: 10.1029/2010GL043473.

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