TY - JOUR
T1 - Videosonde observation of torrential rain during Baiu season
AU - Takahashi, Tsutomu
AU - Yamaguchi, Nachiko
AU - Kawano, Tetsuya
N1 - Funding Information:
This research was the primary concern of the principal investigator (T.T.) during 10 years of service at Kyushu University. Many students participated in this project. We had the full support of the Kagoshima and Fukuoka Regional Offices of the Japan Meteorological Agency and of the Kumamoto Radio Communication Office. Special thanks are addressed to Mr. M. Fukumori of the Yamaguchi Weather Station and to Mr. H. Kariya of the Fukuoka Regional Office who provided valuable data during analysis. MRI also provided radar data. We were supported by funding from the Japan Department of Culture and Education, the National Space and Development Agency, the Mitsubishi Foundation, the Toyota Foundation, and the Climate Center of Tokyo University.
PY - 2001
Y1 - 2001
N2 - Water accumulation processes producing torrential rain over the southern part of Kyushu Island, Japan during Baiu season have been investigated. The cloud systems involved rain cells that became stationary over Kagoshima City and increased in height. Small, new cells subsequently developed upwind or to the side of the stationary cell and merged with it. Heavy rain was recorded as each cell merged. Data from videosonde ascents in the merging cells showed many large graupel in a narrow area of the cloud just above the freezing level. It is suggested that the intense accumulation of water near that level is produced by the rapid growth of graupel through the capture of supercooled drops transported from the merging cell. Cold dome formation is suggested as the reason for the sudden cessation of cell movement observed in many instances of heavy rain.
AB - Water accumulation processes producing torrential rain over the southern part of Kyushu Island, Japan during Baiu season have been investigated. The cloud systems involved rain cells that became stationary over Kagoshima City and increased in height. Small, new cells subsequently developed upwind or to the side of the stationary cell and merged with it. Heavy rain was recorded as each cell merged. Data from videosonde ascents in the merging cells showed many large graupel in a narrow area of the cloud just above the freezing level. It is suggested that the intense accumulation of water near that level is produced by the rapid growth of graupel through the capture of supercooled drops transported from the merging cell. Cold dome formation is suggested as the reason for the sudden cessation of cell movement observed in many instances of heavy rain.
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U2 - 10.1016/S0169-8095(01)00083-7
DO - 10.1016/S0169-8095(01)00083-7
M3 - Article
AN - SCOPUS:0034781479
SN - 0169-8095
VL - 58
SP - 205
EP - 228
JO - Journal de Recherches Atmospheriques
JF - Journal de Recherches Atmospheriques
IS - 3
ER -