2013 Fiscal Year Final Research Report
Study on the fine structure of convective cells in developed cumulonimbus clouds using 10-sec rainfall amount
| Project/Area Number |
23654164
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Gunma University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
NAKAI Sento 独立行政法人防災科学技術研究所, 雪氷防災研究センター, 総括主任研究員 (20360365)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 積乱雲 / 対流セル / 微細構造 / 10秒雨量 / 降水コア |
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| Research Abstract |
The fine structure of convective cells in developed cumulonimbus clouds was investigated by measuring the amount of rainfall at 10-s intervals with two different types of precipitation sensors. The time series for 10-s rain intensity obtained from both precipitation sensors exhibited a distinct temporal cycle with a period of 1-2 min, and these temporal cycles were synchronized with each other. These features imply that each convective cell consists of distinct precipitation cores distributed at rather regular intervals of approximately 1 km. Despite this distinct periodic feature, associated variations in surface meteorological parameters were not clear.
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