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

合作研究：南极高原的长波辐射过程和表面能量收支

基本信息

批准号：
0540087
负责人：
Von Walden
金额：
$ 17.5万
依托单位：
Regents of the University of Idaho
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2006
资助国家：
美国
起止时间：
2006-03-01 至 2010-02-28
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0540087&HistoricalAwards=false
关键词：
Collaborative Research Longwave Radiation Processes

项目摘要

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.

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预算并与南极中尺度大气模型进行比较。这项工作基于 2001 年在南极站进行的为期一年的现场实验，即南极大气辐射和云激光雷达实验 (SPARCLE)。两项主要工作是 1) 确定短波和长波辐射通量、显热、潜热和地下热通量的月度值，以量化不确定性并确定能源预算可以关闭的准确性，以及 2)将极地中尺度模型（PMM5）的预测与观测到的地表能量收支成分和云进行比较，并诊断任何差异的原因。南极高原上空的大气在全球范围内发挥着独特的作用气候系统。它是地球上最冷、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预算。当光谱解析时，长波辐射对于大气和地表特性的遥感非常有用，特别是在极地冬季。这些分析产品预计将刺激和支持其他领域的研究，包括遥感、气候建模和南极洲潜在的全年后勤业务的天气预报。这里提出的数据分析项目还将提供来自南极高原的数据，这些数据可用于约束和测试大气环流模型。