Impact of the Doppler spread parameterization on the simulation of the middle atmosphere circulation using the MA/ECHAM4 general circulation model
Impact of the Doppler spread parameterization on the simulation of the middle atmosphere circulation using the MA/ECHAM4 general circulation model
复制标题
多普勒扩展参数化对使用 MA/ECHAM4 大气环流模型模拟中层大气环流的影响
DOI：
10.1029/97jd01096
复制
发表时间：
1997
影响因子：
--
通讯作者：
C. McLandress
中科院分区：
文献类型：
--
作者：
E. Manzini;N. McFarlane;C. McLandress
本文介绍了一个包括重力波动量沉积多普勒扩散参数化的大气环流模式所模拟的中层大气纬向平均环流。为了说明参数化的影响，这个模拟相比，另一个通过使用瑞利摩擦代替。结果表明，多普勒扩散参数化通过降低急流最大值以上的纬向风强度，改善了中层的纬向外平均环流。参数化也改善了模拟赤道半年振荡的纬向平均纬向风在平流层顶的东向相位和它的向下传播。
The zonal mean circulation of the middle atmosphere simulated by a general circulation model that includes the Doppler spread parameterization of gravity-wave momentum deposition is presented. To illustrate the impact of the parameterization, this simulation is compared to another obtained by using Rayleigh friction instead. It is found that the Doppler spread parameterization improves the extratropical zonal mean circulation in the mesosphere by reducing the strength of the zonal winds above the jet maximum. The parameterization also improves the simulation of the equatorial semiannual oscillation in the zonal mean zonal wind at the stratopause by enhancing the eastward phase and its downward propagation.