Development and Testing of a Simple Microphysical-ConvectiveRadiative Model of Marine Boundary-Layer Clouds

海洋边界层云的简单微物理对流辐射模型的开发和测试

• 批准号: 9215951
• 负责人: Sonia Kreidenweis
• 金额: $ 28.48万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-01 至 1999-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9215951&HistoricalAwards=false
• 关键词: Development; Testing; Simple; Microphysical; ConvectiveRadiative

In view of their large potential climate impacts, the role of cloud condensation nuclei (CCN) in determining the global distribution of clouds and their optical properties is of great current interest, but is not yet well understood. Insight into the nature of the steady states attainable in the marine boundary layer will be obtained by simulating the interactions between aerosols, clouds, and radiation using a simple model that describes the key components of the system in a parameterized way. The boundary- layer cloud model to be developed, implemented, and tested includes: (1) A physically based parameterization of CCN sources, sinks, and transports; (2) A parameterization of boundary-layer cloud formation and dissipation, including the effects of drizzle formation as regulated by the predicted CCN; and (3) A parameterization of radiative transfer in the cloudy boundary layer, including both solar and terrestrial radiation, and taking into account the cloud particle number density and size distribution and the cloud liquid water content. A case study from the 1992 Atlantic Stratocumulus Transition Experiment (ASTEX) will be selected and used to test the model. The proposed study will provide a foundation for future work to incorporate CCN physics into general circulation models.

鉴于其巨大的潜在气候影响， 云凝结核（CCN）在确定全球 云的分布及其光学性质是非常重要的 目前的兴趣，但还没有得到很好的理解。 洞察 海洋边界层中可达到的定常状态的性质 将通过模拟气溶胶之间的相互作用来获得， 云和辐射使用一个简单的模型，描述了关键的 以参数化的方式对系统的各个组成部分进行建模。 边界- 待开发、实施和测试的层云模型 包括以下步骤： (1)CCN源、汇和 运输; (2)边界层云形成的参数化和 消散，包括毛毛雨形成的影响， 由预测的CCN调节;以及 (3)多云天气辐射传输的参数化 边界层，包括太阳和地球 辐射，并考虑到云粒子数 密度和大小分布以及云液态水 内容 1992年大西洋层积云转换的个例研究 将选择实验（ASTEX）并用于测试模型。 拟议的研究将为今后的工作奠定基础， 将云凝结核物理学纳入大气环流模式。