The diurnal cycle of the West African monsoon circulation
The diurnal cycle of the West African monsoon circulation
复制标题
西非季风环流的日循环
DOI：
10.1256/qj.04.52
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发表时间：
2005
影响因子：
8.9
通讯作者：
A. Tompkins
中科院分区：
文献类型：
--
作者：
D. Parker;R. Burton;A. Diongue‐Niang;R. Ellis;M. Felton;C. Taylor;C. Thorncroft;P. Bessemoulin;A. Tompkins
使用数值模型分析表明，西非季风存在连贯的昼夜循环。正如之前对干旱和半干旱地区的研究所观察到的那样，当对流边界层（CBL）较深时，下午风最弱，而当边界层湍流较弱时，风在夜间增强。这种昼夜循环在季风层北部达到最大，那里的经向气压梯度和CBL的昼夜循环都很强。
Using numerical model analyses, it is shown that there is a coherent diurnal cycle of the West African monsoon winds. As has been observed in previous studies of arid and semi‐arid areas, the winds are at their weakest in the afternoon when the convective boundary layer (CBL) is deep, and intensify overnight when the boundary‐layer turbulence is much weaker. This diurnal cycle is maximized in the northern part of the monsoon layer, where the meridional pressure gradient and the diurnal cycle of the CBL are both strong.