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Relationship between Wind and Precipitation Observed with a UHF Radar, GPS Rawinsondes and Surface Meteorological Instruments at Kototabang, West Sumatera during September-October 1998.

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Title: Relationship between Wind and Precipitation Observed with a UHF Radar, GPS Rawinsondes and Surface Meteorological Instruments at Kototabang, West Sumatera during September-October 1998.
Authors: MURATA, Fumie Browse this author
YAMANAKA, Manabu D Browse this author
FUJIWARA, Masatomo Browse this author →KAKEN DB
OGINO, Shin-Ya Browse this author
HASHIGUCHI, Hiroyuki Browse this author
FUKAO, Shoichiro Browse this author
KUDSY, Mahally Browse this author
SRIBIMAWATI, Tien Browse this author
HARIJONO, Sri Woro B Browse this author
KELANA, Eddy Browse this author
Issue Date: 2002
Publisher: 日本気象学会
Journal Title: Journal of the Meteorological Society of Japan
Volume: 80
Issue: 3
Start Page: 347
End Page: 360
Publisher DOI: 10.2151/jmsj.80.347
Abstract: Simultaneous observations with a UHF-band boundary layer radar (hereafter referred as BLR), GPS rawinsondes and a tipping-bucket-type rain gauge were conducted at Kototabang (0.20 S, 100.32 E, 865 m MSL), which is located on the mountainous region near Bukittinggi, West Sumatera Province, during 27 September–7 October 1998 (rainy season). Low-level (1–3 km) westerly wind stronger than 10 m/s was observed, and precipitation tended to occur when the low-level westerly wind became weak (2–5 October). Similar relationship was observed for two months (1 September–31 October 1998) during which only BLR and surface meteorological instruments were operated at Kototabang. NCEP/NCAR objective analysis, and GMS TBB data showed that the low-level (850 hPa) wind field, and cloud distribution, were both completely different between the Indonesian Archipelago (east of Kototabang) and the eastern Indian Ocean—including the Bay of Bengal (west of Kototabang)—during the analysis period. Two large-scale cloud disturbances existed along the equator in the western side (80 –100 E), but precipitation at Kototabang did not correspond to these cloud disturbances. The implication is that effects of the mountain range of Sumatera blocked the large-scale cloud disturbances over the Indian Ocean. The precipitation by local-scale cloud systems prevailed at Kototabang. The convergences of local circulations, which are generally dominant under weak background winds, are considered as the major cause of local-scale cloud systems.
Type: article
URI: http://hdl.handle.net/2115/64855
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藤原 正智

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