Statistical and Physical Analysis of the Vertical Structure of Precipitation in the Mountainous West Region of the United States Using 11+ Years of Spaceborne Observations from TRMM Precipitation Radar
Statistical and Physical Analysis of the Vertical Structure of Precipitation in the Mountainous West Region of the United States Using 11+ Years of Spaceborne Observations from TRMM Precipitation Radar
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DOI：
10.1175/jamc-d-12-095.1
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发表时间：
2013-02
影响因子：
3
通讯作者：
Q. Cao;Y. Hong;J. Gourley;Y. Qi;Jian Zhang;Y. Wen;P. Kirstetter
中科院分区：
文献类型：
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作者：
Q. Cao;Y. Hong;J. Gourley;Y. Qi;Jian Zhang;Y. Wen;P. Kirstetter
摘要本研究对美国宇航局-日本宇宙航空研究开发机构（JAXA）热带降雨测量使命（TRMM）降水雷达（PR）在加州南部、亚利桑那州和新墨西哥州西部地区测量的降水垂直结构进行了统计分析，地面下一代雷达（NEXRAD）由于复杂地形对波束的阻挡，地面观测网难以准确测量地面降水量。本研究从2000年1月1日至2011年10月26日应用了TRMM PR版本7产品2A23和2A25。PR反射率垂直廓线（VPR）以及风暴高度、冻结层和亮带的季节、空间、强度相关和类型相关变化特征。通过对VPR斜率的物理拟合，研究了VPR低层反射率的增强和减弱。结果表明：降水类型是决定降水特征的最重要因素。
AbstractThis study presents a statistical analysis of the vertical structure of precipitation measured by NASA–Japan Aerospace Exploration Agency’s (JAXA) Tropical Rainfall Measuring Mission (TRMM) precipitation radar (PR) in the region of southern California, Arizona, and western New Mexico, where the ground-based Next-Generation Radar (NEXRAD) network finds difficulties in accurately measuring surface precipitation because of beam blockages by complex terrain. This study has applied TRMM PR version-7 products 2A23 and 2A25 from 1 January 2000 to 26 October 2011. The seasonal, spatial, intensity-related, and type-related variabilities are characterized for the PR vertical profile of reflectivity (VPR) as well as the heights of storm, freezing level, and bright band. The intensification and weakening of reflectivity at low levels in the VPR are studied through fitting physically based VPR slopes. Major findings include the following: precipitation type is the most significant factor determining the charac...