Validation of GPM Precipitation Products by Comparison with Ground-Based Parsivel Disdrometers over Jianghuai Region

In this study, we evaluated the performance of rain-retrieval algorithms for the Version 6 Global Precipitation Measurement Dual-frequency Precipitation Radar (GPM DPR) products, against disdrometer observations and improved their retrieval algorithms by using a revised shape parameter <i>&...

Full description

Bibliographic Details
Main Authors:	Zuhang Wu, Yun Zhang, Lifeng Zhang, Xiaolong Hao, Hengchi Lei, Hepeng Zheng
Format:	Article
Language:	English
Published:	MDPI AG 2019-06-01
Series:	Water
Subjects:	satellite precipitation products ground-based validation precipitation cloud physics
Online Access:	https://www.mdpi.com/2073-4441/11/6/1260

id	doaj-ea2420445da84714921c8ad33e2eb714
record_format	Article
spelling	doaj-ea2420445da84714921c8ad33e2eb7142020-11-24T20:57:57ZengMDPI AGWater2073-44412019-06-01116126010.3390/w11061260w11061260Validation of GPM Precipitation Products by Comparison with Ground-Based Parsivel Disdrometers over Jianghuai RegionZuhang Wu0Yun Zhang1Lifeng Zhang2Xiaolong Hao3Hengchi Lei4Hepeng Zheng5Department of Atmosphere Science and Engineering, College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, ChinaDepartment of Atmosphere Science and Engineering, College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, ChinaDepartment of Atmosphere Science and Engineering, College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, ChinaBeijing Tracking and Communication Technology Research Institute, Beijing 100000, ChinaInstitute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100000, ChinaDepartment of Atmosphere Science and Engineering, College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, ChinaIn this study, we evaluated the performance of rain-retrieval algorithms for the Version 6 Global Precipitation Measurement Dual-frequency Precipitation Radar (GPM DPR) products, against disdrometer observations and improved their retrieval algorithms by using a revised shape parameter <i>µ</i> derived from long-term Particle Size Velocity (Parsivel) disdrometer observations in Jianghuai region from 2014 to 2018. To obtain the optimized shape parameter, raindrop size distribution (DSD) characteristics of summer and winter seasons over Jianghuai region are analyzed, in terms of six rain rate classes and two rain categories (convective and stratiform). The results suggest that the GPM DPR may have better performance for winter rain than summer rain over Jianghuai region with biases of 40% (80%) in winter (summer). The retrieval errors of rain category-based <i>µ</i> (3−5%) were proved to be the smallest in comparison with rain rate-based <i>µ</i> (11−13%) or a constant <i>µ</i> (20−22%) in rain-retrieval algorithms, with a possible application to rainfall estimations over Jianghuai region. Empirical <i>D<sub>m</sub></i>−<i>Z<sub>e</sub></i> and <i>N<sub>w</sub></i>−<i>D<sub>m</sub></i> relationships were also derived preliminarily to improve the GPM rainfall estimates over Jianghuai region.https://www.mdpi.com/2073-4441/11/6/1260satellite precipitation productsground-based validationprecipitationcloud physics
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Zuhang Wu Yun Zhang Lifeng Zhang Xiaolong Hao Hengchi Lei Hepeng Zheng
spellingShingle	Zuhang Wu Yun Zhang Lifeng Zhang Xiaolong Hao Hengchi Lei Hepeng Zheng Validation of GPM Precipitation Products by Comparison with Ground-Based Parsivel Disdrometers over Jianghuai Region Water satellite precipitation products ground-based validation precipitation cloud physics
author_facet	Zuhang Wu Yun Zhang Lifeng Zhang Xiaolong Hao Hengchi Lei Hepeng Zheng
author_sort	Zuhang Wu
title	Validation of GPM Precipitation Products by Comparison with Ground-Based Parsivel Disdrometers over Jianghuai Region
title_short	Validation of GPM Precipitation Products by Comparison with Ground-Based Parsivel Disdrometers over Jianghuai Region
title_full	Validation of GPM Precipitation Products by Comparison with Ground-Based Parsivel Disdrometers over Jianghuai Region
title_fullStr	Validation of GPM Precipitation Products by Comparison with Ground-Based Parsivel Disdrometers over Jianghuai Region
title_full_unstemmed	Validation of GPM Precipitation Products by Comparison with Ground-Based Parsivel Disdrometers over Jianghuai Region
title_sort	validation of gpm precipitation products by comparison with ground-based parsivel disdrometers over jianghuai region
publisher	MDPI AG
series	Water
issn	2073-4441
publishDate	2019-06-01
description	In this study, we evaluated the performance of rain-retrieval algorithms for the Version 6 Global Precipitation Measurement Dual-frequency Precipitation Radar (GPM DPR) products, against disdrometer observations and improved their retrieval algorithms by using a revised shape parameter <i>µ</i> derived from long-term Particle Size Velocity (Parsivel) disdrometer observations in Jianghuai region from 2014 to 2018. To obtain the optimized shape parameter, raindrop size distribution (DSD) characteristics of summer and winter seasons over Jianghuai region are analyzed, in terms of six rain rate classes and two rain categories (convective and stratiform). The results suggest that the GPM DPR may have better performance for winter rain than summer rain over Jianghuai region with biases of 40% (80%) in winter (summer). The retrieval errors of rain category-based <i>µ</i> (3−5%) were proved to be the smallest in comparison with rain rate-based <i>µ</i> (11−13%) or a constant <i>µ</i> (20−22%) in rain-retrieval algorithms, with a possible application to rainfall estimations over Jianghuai region. Empirical <i>D<sub>m</sub></i>−<i>Z<sub>e</sub></i> and <i>N<sub>w</sub></i>−<i>D<sub>m</sub></i> relationships were also derived preliminarily to improve the GPM rainfall estimates over Jianghuai region.
topic	satellite precipitation products ground-based validation precipitation cloud physics
url	https://www.mdpi.com/2073-4441/11/6/1260
work_keys_str_mv	AT zuhangwu validationofgpmprecipitationproductsbycomparisonwithgroundbasedparsiveldisdrometersoverjianghuairegion AT yunzhang validationofgpmprecipitationproductsbycomparisonwithgroundbasedparsiveldisdrometersoverjianghuairegion AT lifengzhang validationofgpmprecipitationproductsbycomparisonwithgroundbasedparsiveldisdrometersoverjianghuairegion AT xiaolonghao validationofgpmprecipitationproductsbycomparisonwithgroundbasedparsiveldisdrometersoverjianghuairegion AT hengchilei validationofgpmprecipitationproductsbycomparisonwithgroundbasedparsiveldisdrometersoverjianghuairegion AT hepengzheng validationofgpmprecipitationproductsbycomparisonwithgroundbasedparsiveldisdrometersoverjianghuairegion
_version_	1716787043873325056

Validation of GPM Precipitation Products by Comparison with Ground-Based Parsivel Disdrometers over Jianghuai Region

Similar Items