Journal of the Meteorological Society of Japan. Ser. II
Online ISSN : 2186-9057
Print ISSN : 0026-1165
ISSN-L : 0026-1165
Articles
Dry Intrusions Following Eastward-Propagating Synoptic-Scale Cloud Systems over Sumatera Island
Fumie MURATAManabu D. YAMANAKAHiroyuki HASHIGUCHIShuichi MORIMahally KUDSYTien SRIBIMAWATIBudi SUHARDIEMRIZAL
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2006 Volume 84 Issue 2 Pages 277-294

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Abstract

We observed four dry intrusions that occurred over Sumatera Island (Sumatra) during the intensive rawinsonde observation periods in 1998-2004. The events were accompanied by westerly winds, and included the passage of a single organized synoptic-scale cloud system, with a structure similar to a squall line. The cloud systems had the properties of a Kelvin wave. Eastward propagation speed was around 13 m/s, and the horizontal scale was several thousand kilometers. Severe rain occurred as the cloud systems passed, and dry intrusion suppressed convections in the rear part.

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© 2006 by Meteorological Society of Japan
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