Radiative‐dynamical climatology of the first‐generation Canadian middle atmosphere model
Radiative‐dynamical climatology of the first‐generation Canadian middle atmosphere model
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DOI：
10.1080/07055900.1997.9649595
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发表时间：
1997-09
期刊：
影响因子：
1.2
通讯作者：
S. Beagley;J. Grandpré;J. Koshyk;N. McFarlane;T. Shepherd
中科院分区：
文献类型：
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作者：
S. Beagley;J. Grandpré;J. Koshyk;N. McFarlane;T. Shepherd
摘要加拿大中部大气模式(MAM)项目是加拿大环境局大气环境服务(AES)和加拿大几所大学的合作项目。其目标是在AES/CCCma第三代大气大气环流模式的基础上，发展一个全面的对流层-平流层-中间层系统的大气环流模式。本文介绍了加拿大第一代MAM的基本特征及其辐射动力气候学的一些方面。对于月平均和纬向平均风和温度的年周期，给出了标准的一阶平均诊断。考察了平均经向环流，比较了定常非绝热流函数、向下控制流函数和剩余流函数。研究发现，即使在赤道期间，向下控制在中层大气层的大部分时间内也能很好地维持在月平均水平。不同阻力过程的相对作用决定了不同的阻力过程。
Abstract The Canadian Middle Atmosphere Modelling (MAM) project is a collaboration between the Atmospheric Environment Service (AES) of Environment Canada and several Canadian universities. Its goal is the development of a comprehensive General Circulation Model of the troposphere‐stratosphere‐mesosphere system, starting from the AES/CCCma third‐generation atmospheric General Circulation Model. This paper describes the basic features of the first‐generation Canadian MAM and some aspects of its radiative‐dynamical climatology. Standard first‐order mean diagnostics are presented for monthly means and for the annual cycle of zonal‐mean winds and temperatures. The mean meridional circulation is examined, and comparison is made between the steady diabatic, downward controlled, and residual streamfunctions. It is found that downward control holds quite well in the monthly mean through most of the middle atmosphere, even during equinoctal periods. The relative roles of different drag processes in determining the...