Investigations of droplet growth and precipitation formation in clouds

云中液滴生长和降水形成的研究

• 批准号: 42635607
• 负责人: Professor Dr. Klaus Dieter Beheng (†)
• 金额: --
• 依托单位: Lehrstuhl für Strömungslehre und Aerodynamisches Institut (AIA)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/42635607?language=en
• 关键词: Investigations; droplet; growth; precipitation; formation

This project is concerned with the influence of cloud turbulence on droplet growth and precipitation. To this end numerical simulations are performed, which include large range of length scales (from micrometers to kilometres) and time scales (from milliseconds to hours). The applied models include DNS for simulation of droplet interaction in turbulent flows, LES for simulation of shallow convection (cumulus clouds), cloud-resolving mesoscale models for simulation of deep convection (shower clouds) as well as box- and one-dimensional models for cloud microphysics. The aim of the project is to quantify the influence of turbulence on cloud droplet formation and include this effect in parameterizations of microphysical processes for simulation of precipitation from shallow and deep cumulus clouds.

本计画系关于云湍流对水滴成长及降水之影响。为此，进行了数值模拟，其中包括大范围的长度尺度（从微米到公里）和时间尺度（从毫秒到小时）。应用的模型包括DNS模拟液滴在湍流中的相互作用，LES模拟浅对流（积云），云解析中尺度模型模拟深对流（阵雨云）以及盒和一维模型云微物理。该项目的目的是量化湍流对云滴形成的影响，并将这一影响纳入微物理过程的参数化，以模拟来自浅积云和深积云的降水。