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contributor authorShibagaki, Yoshiaki
contributor authorShimomai, Toyoshi
contributor authorKozu, Toshiaki
contributor authorMori, Shuichi
contributor authorFujiyoshi, Yasushi
contributor authorHashiguchi, Hiroyuki
contributor authorYamamoto, Masayuki K.
contributor authorFukao, Shoichiro
contributor authorYamanaka, Manabu D.
date accessioned2017-06-09T17:27:47Z
date available2017-06-09T17:27:47Z
date copyright2006/06/01
date issued2006
identifier issn0027-0644
identifier otherams-85699.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4229174
description abstractMultiscale aspects of convective systems over the Indonesian Maritime Continent in the convectively active phase of an intraseasonal oscillation (ISO) during November 2002 are studied using Geostationary Meteorological Satellite infrared data and ground-based observational data from X-band rain radar, equatorial atmosphere radar, L-band boundary layer radar, and upper-air soundings at Koto Tabang (KT; 0.20°S, 100.32°E; 865 m above mean sea level), West Sumatera, Indonesia. In the analysis period, four super cloud clusters (SCCs; horizontal scale of 2000?4000 km), associated with an ISO, are seen to propagate eastward from the eastern Indian Ocean to the Indonesian Maritime Continent. The SCCs are recognized as envelopes of convection, composed of meso-α-scale cloud clusters (MαCCs; horizontal scale of 500?1000 km) propagating westward. When SCCs reach the Indonesian Maritime Continent, the envelopes disappear but MαCCs are clearly observed. Over Sumatera, the evolution and structure of a distinct MαCC is closely related to the organization of localized cloud systems with a diurnal cycle. The cloud systems are characterized by westward-propagating meso-?-scale cloud clusters (M?CCs; horizontal scale of ?100 km) developed in eastern Sumatera, and an orographic cloud system formed over a mountain range in western Sumatera. Ground-based observations further revealed the internal structure of the orographic cloud system around KT. A meso-?-scale convective precipitation system with eastward propagation (E-M?CP; horizontal scale of ?40 km) is found with the formation of the orographic cloud system. This is associated with a low-level wind change from easterly to westerly, considered to be local circulation over the mountain range. The E-M?CP also indicates a multicell structure composed of several meso-?-scale convective precipitation systems (horizontal scale of <10 km) with multiple evolution stages (formation, development, and dissipation).
publisherAmerican Meteorological Society
titleMultiscale Aspects of Convective Systems Associated with an Intraseasonal Oscillation over the Indonesian Maritime Continent
typeJournal Paper
journal volume134
journal issue6
journal titleMonthly Weather Review
identifier doi10.1175/MWR3152.1
journal fristpage1682
journal lastpage1696
treeMonthly Weather Review:;2006:;volume( 134 ):;issue: 006
contenttypeFulltext


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