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Article

Microphysical and Polarimetric Radar Signatures of an Epic Flood Event in Southern China

1
Department of Hydraulic Engineering, State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
2
Electrical and Computer Engineering, Colorado State University, Fort Collins, CO 80523, USA
3
NOAA Physical Sciences Laboratory, Boulder, CO 80305, USA
4
Hangzhou Meteorological Bureau, Hangzhou 310051, China
5
State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(17), 2772; https://doi.org/10.3390/rs12172772
Received: 2 July 2020 / Revised: 14 August 2020 / Accepted: 24 August 2020 / Published: 26 August 2020
(This article belongs to the Special Issue Remote Sensing of Precipitation: Part II)
An extremely heavy rainfall event hit Guangdong province, China, from 27 August to 1 September 2018. There were two different extreme rain regions, respectively, at the Pearl River estuary and eastern Guangdong, and a record-breaking daily precipitation of 1056.7 mm was observed at Gaotan station on 30 August. This paper utilizes a suite of observations from soundings, a gauge network, disdrometers, and polarimetric radars to gain insights to the two rainfall centers. The large-scale meteorological forcing, rainfall patterns, and microphysical processes, as well as radar-based precipitation signatures are investigated. It is concluded that a west-moving monsoon depression played a critical role in sustaining the moisture supply to the two extreme rain regions, and the combined orographic enhancement further contributed to the torrential rainfall over Gaotan station. The raindrop size distributions (DSD) observed at Zhuhai and Huidong stations, as well as the observed polarimetric radar signatures indicate that the rainfall at Doumen region was characterized by larger raindrops but a lower number concentration compared with that at Gaotan region. In addition, the dual-polarization radars are used to quantify precipitation intensity during this extreme event, providing timely information for flood warning and emergency management decision-making. View Full-Text
Keywords: extreme rainfall; polarimetric radar signatures; quantitative precipitation estimation; southern china extreme rainfall; polarimetric radar signatures; quantitative precipitation estimation; southern china
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MDPI and ACS Style

Ma, Y.; Chen, H.; Ni, G.; Chandrasekar, V.; Gou, Y.; Zhang, W. Microphysical and Polarimetric Radar Signatures of an Epic Flood Event in Southern China. Remote Sens. 2020, 12, 2772. https://doi.org/10.3390/rs12172772

AMA Style

Ma Y, Chen H, Ni G, Chandrasekar V, Gou Y, Zhang W. Microphysical and Polarimetric Radar Signatures of an Epic Flood Event in Southern China. Remote Sensing. 2020; 12(17):2772. https://doi.org/10.3390/rs12172772

Chicago/Turabian Style

Ma, Yu, Haonan Chen, Guangheng Ni, V. Chandrasekar, Yabin Gou, and Wenjuan Zhang. 2020. "Microphysical and Polarimetric Radar Signatures of an Epic Flood Event in Southern China" Remote Sensing 12, no. 17: 2772. https://doi.org/10.3390/rs12172772

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