Simulating convective clouds with sustained supercooled liquid water down to −37.5°C using a spectral microphysics model
Simulating convective clouds with sustained supercooled liquid water down to −37.5°C using a spectral microphysics model
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DOI：
10.1029/2000gl012662
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发表时间：
2001-10
影响因子：
5.2
通讯作者：
A. Khain;D. Rosenfeld;A. Pokrovsky
中科院分区：
文献类型：
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作者：
A. Khain;D. Rosenfeld;A. Pokrovsky
飞机对对流云中高度过冷水（-37.5°C 时为 1.8 gm−3）的观测通过具有明确微物理过程和湍流效应的数值云模型再现。该模型表明，高浓度 CCN 和强烈上升气流引起的大量小云滴对于再现观测结果至关重要。同一模型仅通过改变 CCN 光谱就可以再现云水快速消耗的微观物理海洋云。这些极端条件所施加的限制揭示了现有云参数化的弱点，以及在云模型中包含非常详细的显式微物理和湍流云过程的必要性。
Aircraft observations of highly supercooled water in convective clouds (1.8 gm−3 at −37.5°C) were reproduced by a numerical cloud model with explicit microphysical processes and turbulent effects. The model showed that large concentrations of small cloud droplets induced by high concentrations of CCN and a strong updraft were essential in reproducing the observations. The same model reproduced microphysically maritime clouds with fast depletion of cloud water by just changing the CCN spectrum. The constrains imposed by these extreme conditions revealed the weakness of existing cloud parameterizations, and the necessity of inclusion of very detailed explicit microphysical and turbulent cloud processes in cloud models.