A Quasi-One-Dimensional Cumulus Cloud Model and Parameterization of Cumulus Heating and Mixing Effects.
A Quasi-One-Dimensional Cumulus Cloud Model and Parameterization of Cumulus Heating and Mixing Effects.
复制标题
准一维积云模型以及积云加热和混合效应的参数化。
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
W. Raymond
中科院分区：
文献类型：
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作者：
H. Kuo;W. Raymond
摘要采用半一维轴对称准拉格朗日稳态模式，考虑了气压扰动、密度分层和附近湿润下沉气流的影响，研究了两种不同环境下积云对流的特征性质：1)可能较不稳定的热带环境和2)较不稳定的中纬度环境，对流层中层稳定层突出。发现干燥环境的压缩加热使云气变暖，略微降低了上升气流速度，湿润的下气流使云气变冷，降低了上升气流和云深，而压力扰动的影响也降低了上升气流，但只对半径为> 1000m的云有效。密度分层的影响是在低层略微减少用水量，在高层略微增加用水量，并略微增加云深。计算出的降水…
Abstract The characteristic properties of cumulus convection are investigated using a semi-one-dimensional, axisymmetric, quasi-Lagrangian steady-state model which takes into consideration the influence of the pressure perturbation, density stratification and nearby moist downdraft under two different environmental situations: 1) a potentially more unstable tropical environment and 2) a less unstable middle-latitude environment with prominent stable layers in the middle troposphere. It is found that the compressional heating of the dry environment makes the cloud air warmer and reduces the updraft velocity slightly, and moist downdraft cools the cloud air and reduces both the updraft and the cloud depth, while the influence of pressure perturbation also reduces the updraft but it is effective only for clouds of radii >1000 m. The influence of density stratification is to reduce wc, slightly at low levels and augment wc, at high levels and to slightly increase the cloud depth. The calculated precipitation ...