Application and Evaluation of Radar Partial Blockage Identification

  • GOU Yabin ,
  • WANG Zhangwei ,
  • LIU Liping ,
  • DUAN Yiping ,
  • CHEN Chao
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  • Hangzhou Meteorological Administration, Hangzhou 310051, China;Jiangsu Institute of Meteorological Sciences, Nanjing 210008, China;Zhejiang Meteorological Bureau, Hangzhou 310051, China;State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Science, Beijing 100081, China;Jiangxi Meteorological Public Service Center, Nanchang 330096, China;Guangdong Meteorological Observatory, Guangzhou 510080, China

Received date: 2014-09-29

  Online published: 2017-02-28

Abstract

Radar beam partial blockage (PBB) is an important error source of radar quantitative precipitation estimation (QPE) algorithms.Using four large-scale weather cases captured by eight CINRADs (China New Generation of Weather Radar) at Shangrao, Huangshan, Hangzhou, Jinhua, Ningbo, Quzhou, Wenzhou and Taizhou and 2047 gauge data observations in Zhejiang, a radar PBB correction scheme is verified and analyzed qualitatively and quantitatively based on the radar PBB identification results of Jinhua, Quzhou and Shangrao.The result shows that in the different weather cases, the radar PBB correction scheme (1) enhances the continuity on the multi-radar mosaic and the radar-QPE field obviously; (2) reduces the error not only in the PBB region but also within the no shielding region and improve radar QPE within the target region indirectly; (3) improves the effectiveness of the Z-R fitting scheme and the optimal interpolation.The elimination of weaker radar echoes and the improvement of multi-radar mosaic data is the most important reason for the enhanced radar QPE accuracy.

Cite this article

GOU Yabin , WANG Zhangwei , LIU Liping , DUAN Yiping , CHEN Chao . Application and Evaluation of Radar Partial Blockage Identification[J]. Plateau Meteorology, 2017 , 36(1) : 229 -240 . DOI: 10.7522/j.issn.1000-0534.2016.00010

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