Effects of Convective Momentum Transport on the Atmospheric Circulation in the Community Atmosphere Model, Version 3
Effects of Convective Momentum Transport on the Atmospheric Circulation in the Community Atmosphere Model, Version 3
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DOI：
10.1175/2007jcli1789.1
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发表时间：
2008-04
影响因子：
4.9
通讯作者：
J. Richter;P. Rasch
中科院分区：
文献类型：
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作者：
J. Richter;P. Rasch
摘要对流动量输送是影响全球环流的一个重要过程。由于缺乏全球观测，很难量化这一过程对对流层气候的影响。这里是由Schneider和Lindzen以及Gregory等人提出的两个对流动量传输参数化的实现，在社区大气模式第三版（CAM 3）中，详细分析了它们对全球气候的影响。对流层纬向动量收支分析表明，对流动量输送主要通过改变科里奥利力矩来影响对流层气候。这些变化使Hadley环流的表现得到改善：12 - 2月，Hadley环流的上升分支在北方半球减弱，在南半球增强，低层北分支减弱。6月至8月，也出现了类似的改善。包括对流动量...
Abstract Transport of momentum by convection is an important process affecting global circulation. Owing to the lack of global observations, the quantification of the impact of this process on the tropospheric climate is difficult. Here an implementation of two convective momentum transport parameterizations, presented by Schneider and Lindzen and Gregory et al., in the Community Atmosphere Model, version 3 (CAM3) is presented, and their effect on global climate is examined in detail. An analysis of the tropospheric zonal momentum budget reveals that convective momentum transport affects tropospheric climate mainly through changes to the Coriolis torque. These changes result in improvement of the representation of the Hadley circulation: in December–February, the upward branch of the circulation is weakened in the Northern Hemisphere and strengthened in the Southern Hemisphere, and the lower northerly branch is weakened. In June–August, similar improvements are noted. The inclusion of convective momentum ...