The role of droplet sedimentation in the evolution of low-level clouds over southern West Africa
The role of droplet sedimentation in the evolution of low-level clouds over southern West Africa
复制标题
液滴沉降在西非南部低层云演化中的作用
DOI：
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复制
发表时间：
2018
影响因子：
6.3
通讯作者：
Tom Choularton
中科院分区：
文献类型：
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作者：
C. Dearden;A. Hill;H. Coe;Tom Choularton
抽象的。进行了大涡模拟，以研究云微物理对季风季期间在西非南部形成的低层云演变的影响。我们发现，即使在没有降水的云中，云滴的大小对液态水的路径也有不可忽视的影响。这是通过液滴沉淀的效应来解释的，它的作用是从靠近云顶的夹带区移走液态水，增加液态水的路径。沉积作用还会产生更不均匀的云结构，并降低云底高度。我们的结果表明，需要对沉积作用的影响进行适当的参数化，以改进在大尺度模式中对西非南部大气边界层日循环的描述。
Abstract. Large-eddy simulations are performed to investigate the influence of cloud microphysics on the evolution of low-level clouds that form over southern West Africa during the monsoon season. We find that, even in clouds that are not precipitating, the size of cloud droplets has a non-negligible effect on liquid water path. This is explained through the effects of droplet sedimentation, which acts to remove liquid water from the entrainment zone close to cloud top, increasing the liquid water path. Sedimentation also produces a more heterogeneous cloud structure and lowers cloud base height. Our results imply that an appropriate parameterization of the effects of sedimentation is required to improve the representation of the diurnal cycle of the atmospheric boundary layer over southern West Africa in large-scale models.
DOI：
10.5194/gmd-2016-194-supplement
发表时间：
2017
期刊：
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影响因子：
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作者：
D. Walters;I. Boutle;M. Brooks;T. Melvin;R. Stratton;S. Vosper;H. Wells;K. Williams;N. Wood
通讯作者：
D. Walters;I. Boutle;M. Brooks;T. Melvin;R. Stratton;S. Vosper;H. Wells;K. Williams;N. Wood
模拟重力波对 VOCALS-UK 期间观察到的层积云的影响
影响因子：
6.3
作者：
Connolly P
通讯作者：
Connolly P