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首页> 外文期刊>Journal of the Atmospheric Sciences >The Use of Partial Cloudiness in a Bulk Cloud Microphysics Scheme: Concept and 2D Results
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The Use of Partial Cloudiness in a Bulk Cloud Microphysics Scheme: Concept and 2D Results

机译：在散装云微型药物方案中使用部分浑浊：概念和2D结果

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摘要

The source and sink terms of microphysical processes vary nonlinearly with cloud condensate amount. Therefore, partial cloudiness is one of the important factors to be considered in a cloud microphysics scheme given that in-cloud condensate amount depends on the cloud fraction of the grid box. An alternative concept to represent the partial cloudiness effect on the microphysical processes of a bulk microphysics scheme is proposed. Based on the statistical relationship between cloud condensate and cloudiness, all hydrometeors in the microphysical processes are treated after converting them to in-cloud values by dividing the amount by estimated cloudiness and multiplying it after the computation of all microphysics terms. The underlying assumption is that all the microphysical processes occur in a cloudy part of the grid box. In a 2D idealized storm case, the Weather Research and Forecasting (WRF) single-moment 5-class (WSM5) microphysics scheme with the proposed approach increases the amount of snow and rain through enhanced autoconversion/accretion and increases precipitation reaching the surface.
机译：微微物理过程的源和水槽术语与云缩合量的非线性变化。因此，局部浑浊是在云微微物理方案中考虑的重要因素之一，因为云凝结物量取决于网格箱的云分数。提出了代表对散装微妙方案的微细胞效应的偏见效应的替代概念。基于云凝结物和云核心之间的统计关系，通过将量通过估计的云层分开并将其乘以计算后，在所有微观物理术语的计算之后将它们转换为内云值后，对微微物理过程中的所有水流仪进行处理。潜在的假设是所有微微物理过程都发生在网格箱的阴影中。在2D理想化的风暴案例中，天气研究和预测（WRF）单机5级（WSM5）微药物方案具有所提出的方法，通过增强的高电平转换/增强，增加了雪和雨量，并增加了沉淀到达表面。

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