Superrotation and equatorial waves in a T21 Venus‐like AGCM
Superrotation and equatorial waves in a T21 Venus‐like AGCM
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T21 类金星 AGCM 中的超自转和赤道波
DOI：
10.1029/2003gl016924
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发表时间：
2003
影响因子：
5.2
通讯作者：
M. Takahashi
中科院分区：
文献类型：
--
作者：
Masaru Yamamoto;M. Takahashi
在T21类金星大气环流模式（Venus-like AGCM）中，在纬向平均热力强迫的驱动下，在云顶（65-70 km）形成了超过100 m s−1的超旋转。这是由Gierasch机制维持的，在该机制中，赤道环流有效地泵起角动量，各种波产生向赤道的涡流动量通量。除了上述机制外，具有宽频率范围的快速赤道波（包括著名的4日波）增强了云顶超旋转，因为垂直传播的重力波的向下角动量通量被快速赤道波的向上通量抵消。
Superrotation of more than 100 m s−1 is formed at the cloud top (65–70 km) in a T21 Venus‐like atmospheric general circulation model (Venus‐like AGCM) driven by a zonal‐mean thermal forcing. This is maintained by the Gierasch mechanism, in which meridional circulation efficiently pumps up angular momentum and various waves produce equatorward eddy momentum fluxes. In addition to the above mechanism, fast equatorial waves with a wide frequency range (including a famous 4‐day wave) enhance the cloud‐top superrotation, since the downward angular momentum flux of vertically propagating gravity waves is canceled by the upward flux of the fast equatorial waves.