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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >PRECIPITATION AND RADIATION MODELING IN A GENERAL CIRCULATION MODEL - INTRODUCTION OF CLOUD MICROPHYSICAL PROCESSES
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PRECIPITATION AND RADIATION MODELING IN A GENERAL CIRCULATION MODEL - INTRODUCTION OF CLOUD MICROPHYSICAL PROCESSES

机译：一般循环模型中的降水和辐射建模-云微物理过程的介绍

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Cloud microphysical processes are introduced in the precipitation parameterization of a general circulation model (GCM). Three microphysical processes are included in this representation of warm cloud precipitation: autoconversion of droplets, collection of droplets by falling raindrops, and evaporation of raindrops falling in clear sky. The mean droplet radius, tau, is calculated from the cloud water mixing ratio, which is computed in the model, and the cloud droplet number concentration, N, which is prescribed. The autoconversion rate is set to zero for tau < tau(0), a prescribed threshold mean droplet radius. We investigate the model sensitivity to tau(0) and to N, the cloud droplet concentration, which is linked to the concentration of cloud condensation nuclei and is likely to vary. We find that an increase in N leads to an increase in the amount of cloud water stored in the atmosphere. In further experiments the mean droplet radius used in the parameterization of cloud optical properties is calculated in the same way as in the precipitation parameterization in order to bring more consistency between the different schemes. We again investigate the model. sensitivity to tau(0) and to N and we find that an increase in N significantly enhances cloud albedo. [References: 56]
机译：在一般循环模型（GCM）的降水参数化中引入了云的微物理过程。暖云降水的这种表示形式包括三个微物理过程：水滴的自动转换，雨滴下落收集的水滴以及晴空下雨滴的蒸发。根据在模型中计算出的云水混合比和规定的云滴数浓度N，计算平均液滴半径tau。对于tau

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