Climate Studies at the South Pole

本项目是对南极雪面光学和物理特性的综合研究。它有四个组成部分，涉及将全球气候变率印入南极冰记录的代理数据的过程。测量表面粗糙度对反射太阳光的角分布和热红外辐射的光谱分布的影响，为地球辐射收支实验（ERBE）卫星数据的解译提供必要的知识。大气气溶胶在雪表面干沉积的机制将通过观察可渗透的上层积雪的气流来测量，并将检查霜样和其同位素组成。前者可以评估冰雪中气溶胶浓度在多大程度上代表同期大气中的浓度，而后者则可以对同位素与环境空气温度的比值进行比较研究。

This project is an integrated study of the optical and physical properties of the antarctic snow surface. It has four components which concern the processes by which global climatic variability is imprinted into the proxy data recorded in the antarctic ice. The effect of surface roughness (sastrugi orientation) on the angular distribution of reflected sunlight, and the spectral distribution of thermal infrared radiation will be measured to provide the knowledge necessary for the interpretation of Earth Radiation Budget Experiment (ERBE) satellite data. The mechanism of dry deposition of atmospheric aerosols in the snow surface will be measured by observing the air flow in the permeable upper firn, and samples of hoarfrost and will be examined for their isotopic composition. The former will allow the evaluation of the extent to which the concentration of aerosols in the firn and ice represent contemporaneous concentrations in the atmosphere, while the latter will yield a comparative study of isotopic ratios to the ambient air temperatures.