| 基于美国AMF寿县观测的云特性研究 |
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| 引用本文： | 邱玉琚,杨会文,倪婷,方凯,汪才军.基于美国AMF寿县观测的云特性研究[J].南京气象学院学报,2012,35(1):80-86. |
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| 作者姓名： | 邱玉琚 杨会文 倪婷 方凯 汪才军 |
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| 作者单位： | 1. 南京信息工程大学大气物理学院,江苏南京,210044
2. 安徽省寿县气象局,安徽寿县,232200 |
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| 基金项目： | 国家高技术研究发展计划项目（2007AA061901）;江苏省青蓝工程资助项目;江苏高校优势学科建设工程资助项目 |
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| 摘 要： | 美国能源部大气辐射观测计划移动观测ARMAMF（atmospheric radiation measurement mobile facility）2008年首次在我国寿县开展综合观测，为研究云特性提供了很好的资料平台。本文在此次云雷达等观测资料基础上，研究了寿县秋末冬初云高、云厚、云量及其辐射特性，结果发现，寿县有76．3％的观测日有云出现，54．0％的观测时间有云覆盖，中云（以下简称M云）和高云（以下简称H云）出现频率占全部云系的76．7％，天气系统对寿县云系形成有较大影响；云底高度大于3km的降水性云（以下简称P云）出现频率占全部P云的67．7％，是云底高度小于3kmP云的5．3倍，发生在下午的降水占全部P云的47．8％，气溶胶可能对P云的这种分布有较大影响；云和气溶胶减少地面短波辐射的日均值达一99．1W／m。，其中气溶胶减少约占25．1％。不同高度和厚度云对地面辐射通量的影响有较大差异，P云产生最大的冷却效应（一201．9W／m。），厚度小于2km的H云对地面辐射通量的减少量最少（一32．9w／m。）。另外，用地面单点云辐射观测与中分辨率成像光谱仪MODIS（moderate resolution imaging spectroradiometer）资料估计结果对比发现，两种资料有较大差异，差异可达-1．9～-36．9W／m。
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| 关 键 词： | 云雷达 云高 云厚 短波辐射 辐射强迫 |
Cloud property analysis by using DOE AMF measurements in Shouxian of China |
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| QIU Yu-jun,YANG Hui-wen,NI Ting,FANG Kai,WANG Cai-jun.Cloud property analysis by using DOE AMF measurements in Shouxian of China[J].Journal of Nanjing Institute of Meteorology,2012,35(1):80-86. |
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| Authors: | QIU Yu-jun YANG Hui-wen NI Ting FANG Kai WANG Cai-jun |
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| Institution: | 2 ( 1. School of Atmospheric Physics, NUIST, Nanjing 210044, China; 2. Shouxian Meteorological Bureau of Anhui, Shouxian 232200, China) |
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| Abstract: | Cloud is critical in understanding the current climate and it plays an important role in simulating potential climate change. The U. S. Department of Energy （DOE） atmospheric radiation measurement （ARM） AMF explored field campaigns that took place in Shouxian in the east of China for the first time in 2008. Based on the observational data, the study presents some preliminary results like cloud height and cloud thickness as well as cloud＇s radiative features in Shouxian during late autumn and early winter. It was found that the occurrence of clouds took 76.3 % of the observational days and 54.0% of the observational time. Middle cloud （M） and high cloud （H） occupied 76.7 % of all the clouds. The weather system is the dominant modulator in cloud formation in Shouxian. In addition, there were more middle clouds （M） transforming into precipitation cloud （P） than low （L） and high cloud （ H）, which is about 67.7 %. Precipitation occurring in the afternoon took 47.8 % of all the precipitation cloud. Aerosol affected the distribution of precipitation cloud obviously. The reduced daily meanshortwave radiation caused by the cloud and aerosol was about- 99. 1 W/m2 with aerosol contributing 25.1% of the value. We quantitatively estimate there are obvious differences in the surface radiation budget caused by the clouds of different heights and thicknesses. P cloud produces the largest cooling effect （ -201.9 W/m2） while the thickness of less than 2 km H cloud has the smallest cooling effect （ - 32. 9 W/m2 ）. There are evident differences between ground site observation and MODIS data estimation, whose value could be - 1.9-- - 36.9 W/m2. |
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| Keywords: | cloud radar cloud height cloud thickness shortwave radiation radiative forcing |
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