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

该项目涉及对所有波长的雪面反射的太阳光角度模式的数据进行分析，这些数据是从南极高原东部圆顶C站先前的实地考察中获得的。将计算太阳辐射与雪面、云和大气气体的相互作用，以推断短波云在表面和大气顶部的辐射强迫。使用地面测量作为下边界条件，将模拟大气顶部的光谱和宽带反照率，并将其与CERES(云和地球辐射能量系统)仪器通过卫星测量地球辐射预算获得的反照率进行比较，并将用于支持对地球辐射预算的研究。这些研究将包括雪上云层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的关系。另一个重要方面将是在测量雪的反射率的基础上，利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。

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.