Journal article
Evaluation of GPM Dual-Frequency Precipitation Radar (DPR) Rainfall Products Using the Rain Gauge Network over China
Journal of hydrometeorology, Vol.22(3), pp.547-559
03/2021
DOI: 10.1175/JHM-D-20-0156.1
Abstract
AbstractThe Dual-Frequency Precipitation Radar (DPR) on board the Global Precipitation Measurement (GPM) mission core satellite provides the new-generation global observation of rain since 2014. The main objective of this paper is to evaluate the suitability and limitation of GPM-DPR level-2 products over China. The DPR rain rate products are compared with rain gauge data during the summers of 5 years (2014–18). The ground observation network is composed of more than 50 000 rain gauges. The DPR precipitation products for all scans (DPR_NS, DPR_MS, and DPR_HS) generally underestimate rain rates. However, DPR_MS agrees better with gauge estimates than DPR_NS and DPR_HS, yielding the lowest mean error, systematic deviation, and highest Pearson correlation coefficient. In addition, all three swath types show obvious overestimation over gauge estimates between 0.5 and 1 mm h−1 and underestimation when gauge estimates are larger than 1 mm h−1. The DPR_HS and DPR_MS agree better with gauge estimates below and above 2.5 mm h−1, respectively. A deeper investigation was carried out to analyze the variation of DPR_MS’s performance with respect to terrains over China. An obvious underestimation, relative to gauge estimates, occurs in Tibetan Plateau while a slight overestimation occurs in the North China Plain. Furthermore, our comprehensive analysis suggests that in Sichuan Basin, the DPR_MS exhibit the best agreement with gauge estimates.
Details
- Title: Subtitle
- Evaluation of GPM Dual-Frequency Precipitation Radar (DPR) Rainfall Products Using the Rain Gauge Network over China
- Creators
- Yang Gao - a National Satellite Meteorological Center, China Meteorological Administration, Beijing, ChinaTongwen Wu - b Beijing Climate Center, China Meteorological Administration, Beijing, ChinaJun Wang - c Department of Chemical and Biochemical Engineering, The University of Iowa, Iowa City, IowaShihao Tang - a National Satellite Meteorological Center, China Meteorological Administration, Beijing, China
- Resource Type
- Journal article
- Publication Details
- Journal of hydrometeorology, Vol.22(3), pp.547-559
- DOI
- 10.1175/JHM-D-20-0156.1
- ISSN
- 1525-755X
- eISSN
- 1525-7541
- Grant note
- name: The Second Tibetan Plateau Scientific Expedition and Research (STEP) program, award: 2019QZKK0105; name: The National Key Research and Development Program of China, award: 2016YFA0602100; DOI: 10.13039/100004142, name: Society of the Friendly Sons of St. Patrick for the Relief of Emigrants from Ireland
- Language
- English
- Date published
- 03/2021
- Academic Unit
- Civil and Environmental Engineering; Physics and Astronomy; Chemical and Biochemical Engineering; Electrical and Computer Engineering
- Record Identifier
- 9984104806302771
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