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  1. 防災科研関係論文

Two types of precipitation particle distribution in convective cells accompanying a Baiu frontal rainband around Okinawa Island, Japan

https://nied-repo.bosai.go.jp/records/4527
https://nied-repo.bosai.go.jp/records/4527
7a5352ca-b003-4ae5-9fdc-d0c311c4e82d
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Two types of precipitation particle distribution in convective cells accompanying a Baiu frontal rainband around Okinawa Island, Japan
言語
言語 eng
著者 M. Oue

× M. Oue

en M. Oue

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H. Uyeda

× H. Uyeda

en H. Uyeda

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Y. Shusse

× Y. Shusse

en Y. Shusse

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抄録
内容記述タイプ Other
内容記述 Polarimetric radar variables and ground-based raindrop size distributions (DSDs) of two convective cells in a Baiu frontal rainband over the Okinawa region were analyzed to clarify the precipitation particle distributions in convective cells with low echo top heights. One cell existed in the stratiform rain zone, and the other was in the convective rain zone of the rainband. Both cells had echo top (30 dBZ) heights of approximately 5.5 km above sea level, with large radar reflectivity (Z(h)) greater than 50 dBZ in each core. For the cell in the stratiform rain zone, polarimetric variables indicated that small raindrops predominated; differential reflectivity (Z(DR)) was smaller than 1.5 dB, and the correlation coefficient (rho(hv)) was greater than 0.98 with large Z(h) (>= 40 dBZ). The DSD showed high number densities of small raindrops with diameters of 1-2 mm. For the other cell, polarimetric variables indicated the presence of large raindrops; Z(DR) greater than 1.5 dB and rho(hv) smaller than 0.98 predominated in large Z(h) (>= 40 dBZ). The DSD for this cell showed lower number densities of raindrops with diameters of 1-2 mm and higher number densities of raindrops exceeding 3 mm. The significance of these distributions was confirmed by the Z(DR) and rho(hv) for 25 cells in the stratiform rain zone and for 28 cells in the convective rain zone. It is notable that different precipitation particle distributions in convective cells were found in the stratiform and convective rain zones of a Baiu frontal rainband with common characteristics of low echo top heights and large Z(h).
言語 en
書誌情報 en : JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES

巻 115, 発行日 2010-01
出版者
言語 en
出版者 AMER GEOPHYSICAL UNION
ISSN
収録物識別子タイプ ISSN
収録物識別子 2169-897X
DOI
関連識別子 10.1029/2009JD011957
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