Ground validation of GPM DPR algorithms by hydrometeor measurements and polarimetric radar observations of winter snow clouds: A case study on 4 February 2018

Rimpei Kamamoto, Kenji Suzuki, Tetsuya Kawano, Hiroshi Hanado, Katsuhiro Nakagawa, Yuki Kaneko

研究成果: Contribution to journalArticle査読

抄録

Two products from the Global Precipitation Measurement (GPM) Dual-frequency Precipitation Radar (DPR) algorithms, a flag of intense solid precipitation above the-10°C height ("flagHeavyIcePrecip") and a classification of precipitation type ("typePrecip") were validated by ground-based hydrometeor measurements and X-band multi-parameter (X-MP) radar observations of snow clouds on 4 February 2018. Contoured frequency by altitude diagrams of the X-MP radar reflectivity exhibited a significant difference between footprints flagged and unflagged by the "flagHeavyIcePrecip" algorithm, which indicated that the algorithm is reasonable. The hydrometeor classification (HC) by the X-MP radar, which was confirmed by microphysical evidence from ground-based hydrometeor measurements, suggested the existence of graupel in the footprints with "flagHeavyIcePrecip". In addition, according to the information of the GPM DPR, the "flagHeavyIcePrecip" footprints were characterized by not only graupel but also large snowflakes. According to the information of X-MP radar HC, the "typePrecip" algorithm by the detection of "flagHeavyIcePrecip" was effective in classifying precipitation types of snow clouds, whereas it seems that there is room for improvement in the "typePrecip" algorithms based on the extended-DPRm-method and H-method.

本文言語英語
ページ(範囲)115-119
ページ数5
ジャーナルScientific Online Letters on the Atmosphere
16
DOI
出版ステータス出版済み - 2020

All Science Journal Classification (ASJC) codes

  • 大気科学

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