Understanding the Effects of Convective Momentum Transport on Climate Simulations: The Role of Convective Heating | Zendy

Xiaoliang Song | Zendy; Xiaoqing Wu | Zendy; Guang J. Zhang | Zendy; Raymond W. Arritt | Zendy

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Understanding the Effects of Convective Momentum Transport on Climate Simulations: The Role of Convective Heating

Author(s) -

Xiaoliang Song,

Xiaoqing Wu,

Guang J. Zhang,

Raymond W. Arritt

Publication year - 2008

Publication title -

journal of climate

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.315

H-Index - 287

eISSN - 1520-0442

pISSN - 0894-8755

DOI - 10.1175/2008jcli2187.1

Subject(s) - convection , forcing (mathematics) , climatology , gcm transcription factors , walker circulation , circulation (fluid dynamics) , zonal and meridional , atmospheric sciences , general circulation model , environmental science , free convective layer , mechanics , geology , physics , climate change , sea surface temperature , oceanography

A simplified general circulation model (GCM), consisting of a complete dynamical core, simple specified physics, and convective momentum transport (CMT) forcing, is used to understand the effects of CMT on climate simulations with a focus on the role of convective heating in the response of circulation to the CMT forcing. It is found that the convective heating dominates the meridional circulation response and dynamical processes dominate the zonal wind response to the CMT forcing in the tropics; the simplified model reproduces some of the key features of CMT-induced circulation changes observed in the full GCM in the tropics. These results suggest that the CMT-induced zonal and meridional circulation changes in the tropics in the full GCM are dominated by dynamical processes and the convective heating, respectively. Inclusion of the CMT in the model induces a marked change in convective heating, which negatively correlates with the change in vertical velocity, indicating the existence of CMT-ind...

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