Abstracts for the 6th International GAME Conf.

3-5 December 2004

Kyoto Japan

Interannual variations of cloud system migration with diurnal cycle over Sumatera Island

Namiko SAKURAI (1), Fumie MURATA (2), Manabu D. YAMANAKA (3), Shuichi MORI (3), HAMADA Jun-Ichi (3), Hiroyuki HASHIGUCHI (6), Yudi Iman Tauhid (7), Tien Sribimawati (7), Budi Suhardi (9)

We have described a systemstic cloud migration with diurnal cycle over Sumatera Island (northward-southward length ¡«1,500 km), based on GMS IR1 data and intense observations with rawinsondes and a wind profiler. Cloud systems start growing up to 11 km in the mountainous area in the western part of Sumatera Island in the afternoon, and migrate for a distance of several hundreds kilometers both westward and eastward from night to morning. By a climatological analysis for one year (May 2001 ¨C April 2002), the westward migration with diurnal cycle appears in almost all the seasons and almost all over the western part of Sumatera, except for August in the southern end, whereas the eastward migration with diurnal cycle is observed only in a zone which is shifted northward and southward with an annual cycle. The zone where the eastward migration appears is identified with ITCZ approximately. For the eastward migration we consider that it is related to features in ITCZ; westerly wind in the lower troposphere is dominant and super cloud clusters are moving eastward in ITCZ around 100oE. We will investigate Interannual variations of diurnal cylce of eastward migration, and show it mainly in the presentation.

Submittal Information

Name : Date :
    Ms. SAKURAI Namiko
    09-Aug-04-20:04:52
Organization : Theme :
    Graduate School of Science and Technology, Kobe University
    Theme 3
Address : Presentation :
    1-1 Rokkodai-cho Nada-ku Kobe-shi Hyogo Japan 657-8501
    Poster or oral
Country : Abstract ID :
    Japan
    T3MSN09Aug04200452
Phone : Fax :
    +81-78-5787
    +81-78-5787
E-mail :
    sakurai@ahs.scitec.kobe-u.ac.jp