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  1. 防災科研関係論文

Relationship between Precipitation Core Behavior in Cumulonimbus Clouds and Surface Rainfall Intensity on 18 August 2011 in the Kanto Region, Japan

https://nied-repo.bosai.go.jp/records/5519
https://nied-repo.bosai.go.jp/records/5519
38fbe2b8-27c0-4c81-97b4-2f3715263d36
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Relationship between Precipitation Core Behavior in Cumulonimbus Clouds and Surface Rainfall Intensity on 18 August 2011 in the Kanto Region, Japan
言語
言語 eng
著者 Yukari Shusse

× Yukari Shusse

en Yukari Shusse

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Masayuki Maki

× Masayuki Maki

en Masayuki Maki

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Shingo Shimizu

× Shingo Shimizu

en Shingo Shimizu

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Koyuru Iwanami

× Koyuru Iwanami

en Koyuru Iwanami

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Takeshi Maesaka

× Takeshi Maesaka

en Takeshi Maesaka

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Shin-ichi Suzuki

× Shin-ichi Suzuki

en Shin-ichi Suzuki

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Namiko Sakurai

× Namiko Sakurai

en Namiko Sakurai

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Ryohei Misumi

× Ryohei Misumi

en Ryohei Misumi

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抄録
内容記述タイプ Other
内容記述 This paper analyzes the behavior of the precipitation cores (PCOs) in three cumulonimbus clouds that caused localized heavy rainfall on 18 August 2011 in the Kanto region, Japan, and their relationship with temporal variations in surface rainfall intensity. The 3D structure of the cumulonimbus clouds was observed at 2-min intervals using a research X-band dual-polarization radar. A PCO was defined as a 3D contiguous region that contained one local maximum of horizontal radar reflectivity Zh, and the PCOs were automatically detected using adaptive thresholds. Subjective tracking procedures using the PCO dataset, which was based on observations made every 2 min, identified 15 PCOs during the total lifespan of the three cumulonimbus clouds.
The PCOs generally descended toward the ground after their appearance aloft. The average appearance height of the PCOs of 5.25 km above sea level (ASL) was slightly above the ambient 0 degrees C level (5.1 km ASL). The duration of each PCO was roughly proportional to its appearance height.
Of the 12 temporal peaks at maximum surface rainfall intensity (> 10 mm h(-1)) recorded from the three cumulonimbus clouds, 10 were associated with the descent of PCOs. In each cumulonimbus cloud, the first PCO was detected 10-12 min before rainfall heavier than 10 mm h-1 was recorded. These results indicate that the behavior of PCOs is closely related to the onset of strong surface rainfall and subsequent fluctuations in surface rainfall intensity.
言語 en
書誌情報 en : JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN

巻 93, 号 2, p. 215-228, 発行日 2015
出版者
言語 en
出版者 METEOROLOGICAL SOC JAPAN
ISSN
収録物識別子タイプ EISSN
収録物識別子 2186-9057
DOI
関連識別子 10.2151/jmsj.2015-012
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