Spectral Bi-Directional Reflectance of Antarctic Snow and Ice

这项研究是关于南极雪粒的性质如何影响可见光和近红外波段太阳辐射反射模式的光谱和角度变化的研究。该项目将增加我们对南极冰盖光学性质的了解，并将为极地陆地和行星遥感应用提供一个量化的数据库。这项研究的目标是开发可用于将基于卫星的测量和其他遥感测量与雪面微物理联系起来的经验和定量方法。该项目的影响延伸到南极洲的气候学，因为南极内部的表面温度在很大程度上是由雪的光学性质决定的。此外，南极的雪面比中纬度的高山雪面要稳定得多，因为太阳高度的日变化很小，甚至没有。与非极地的雪面相比，南极的冰雪被煤烟和其他沉积的气溶胶污染得更少。该项目设计良好，建立在现有数据库的基础上，是开发飞机和卫星观测解释算法的必要组成部分。

This study is an investigation of how the properties of antarctic snow grains affect spectral and angular variations in the reflectance pattern of solar radiation in the visible and near-infrared bands. The project will increase our understanding of the optical properties of the antarctic ice sheet, and will provide a quantitative data base for polar terrestrial and planetary remote sensing applications. The goal of this research is to develop empirical and quantitative methods which can be used to relate satellite-based and other remotely sensed measurements to the microphysical of the snow surface. The project has implications that extend to the climatology of Antarctica since surface temperatures in the interior are determined to a great extent by the optical properties of the snow. The antarctic snow surface is moreover much more stable than mid-latitude alpine snow surfaces since there is little or no diurnal variation in the elevation of the sun. The antarctic snow and ice sheet is also less contaminated with soot and other deposited aerosols then non-polar snow surfaces. The project is well-designed, builds upon the existing data base, and is a necessary component in the development of interpretation algorithms for aircraft and satellite observations.