Interaction of Clouds, Snow, and Solar Radiation on the East Antarctic Plateau

南极东部高原云、雪和太阳辐射的相互作用

• 批准号: 0636993
• 负责人: Stephen Warren
• 金额: $ 26.76万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-06-01 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0636993&HistoricalAwards=false
• 关键词: Interaction; Clouds; Snow; Solar; Radiation

This project concerns the analysis of data on the angular patterns of sunlight reflected by the snow surface at all wavelengths, obtained from prior fieldwork at Dome C Station on the East Antarctic Plateau. The interactions of solar radiation with the snow surface, with clouds, and with atmospheric gases, will be computed to infer shortwave cloud radiative forcing at both the surface and the top of the atmosphere. Using the surface measurements as the lower boundary condition, the spectral and broadband albedo at the top of the atmosphere will be modeled and compared to those obtained from satellite measurements of the Earth Radiation Budget by the CERES (Clouds and the Earth's Radiant Energy System) instruments, and will be used to support studies of the Earth's radiation budget. These studies will include the enhancement of forward-reflected radiation by clouds over snow, and the relation of angular scattering pattern and the albedo at the surface to those at the top of the atmosphere. An additional important aspect will be the study of the effect of clouds over snow on the absorption of solar radiation in the atmosphere, using spectral radiative transfer modeling, based on the measurements of the snow reflectance.

该项目涉及对雪面反射的所有波长的太阳光角度模式的数据进行分析，这些数据是从东南极高原 Dome C 站先前的实地考察中获得的。 将计算太阳辐射与雪面、云层和大气气体的相互作用，以推断大气表面和大气顶部的短波云辐射强迫。使用表面测量作为下边界条件，对大气顶部的光谱和宽带反照率进行建模，并将其与 CERES（云和地球辐射能系统）仪器对地球辐射收支的卫星测量获得的数据进行比较，并将用于支持地球辐射收支的研究。 这些研究将包括雪上云对前向反射辐射的增强，以及角散射模式和地表反照率与大气顶部反照率的关系。 另外一个重要的方面是，基于雪反射率的测量，使用光谱辐射传输模型，研究雪上的云对大气中太阳辐射吸收的影响。