Collaborative Research: Longwave Radiation Processes and Surface Energy Budget on the Antarctic Plateau

这项工作将继续分析雪光谱发射率和云过程的几个方面，并将扩展到分析完整的表面能量收支并与南极中尺度大气模式进行比较。 这项工作的基础是2001年在南极站进行的为期一年的实地实验，即南极大气辐射和云激光雷达实验。 两项主要工作将是：1）确定短波和长波辐射通量、感热、潜热和次表层热通量的月值，以量化不确定性并确定能量收支可以接近的精度; 2）将极地中尺度模型（PMM 5）的预测与观测到的地表能量收支分量和云进行比较。并诊断任何差异的原因。南极高原的大气在全球气候系统中起着独特的作用。它是地球上最冷和最干燥的大气层，辐射过程主导着地表和大气层顶部的能量收支。 长波辐射在光谱分解后，对大气和地表特性的遥感极为有用，特别是在极地冬季。 预计分析产品将刺激和支持其他领域的研究，包括遥感、气候建模和南极洲天气预报，以促进可能的全年后勤业务。这里提议的数据分析项目还将提供来自南极高原的数据，有助于限制和测试大气环流模型。

This work will continue the analyses of several aspects of snow spectral emissivity andcloud processes, and will be extended to analyze the complete surface energy budget and to makecomparisons with an antarctic mesoscale atmospheric model. The work is based on a year-long field experiment, the South Pole Atmospheric Radiation and Cloud Lidar Experiment (SPARCLE), carried out during 2001 at South Pole Station. The two primary efforts will be 1) determining monthly values of shortwave and longwave radiation fluxes, sensible heat, latent heat, and subsurface heat flux, in order to quantify uncertainties and defining the accuracy to which the energy budget can be closed, and 2) comparing predictions of the Polar Mesoscale Model (PMM5) to the observed surface energy budget components and clouds, and diagnosing causes of any discrepancies.The atmosphere over the Antarctic Plateau plays a unique role in the global climate system. It is the coldest and driest atmosphere on earth, with radiation processes dominating both the surface and the top-of-atmosphere energy budgets. When spectrally resolved, longwave radiation is extremely useful for remote sensing of atmospheric and surface properties, particularly in the polar winter. The analysis products are expected to stimulate and support research in other areas, including remote sensing, climate modeling, and weather forecasting in Antarctica for potential year-round logistical operations. The data analysis projects proposed here will also provide data from the Antarctic Plateau useful in constraining and testing general circulation models.