Diurnal cycle of cloud system migration over Sumatera Island
Diurnal cycle of cloud system migration over Sumatera Island
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DOI：
10.2151/jmsj.83.835
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发表时间：
2005-10
影响因子：
3.1
通讯作者：
Namiko Sakurai;F. Murata;M. Yamanaka;S. Mori;Jun-ichi Hamada;H. Hashiguchi;Y. I. Tauhid;Tien Sribimawati;Budi Suhardi
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文献类型：
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作者：
Namiko Sakurai;F. Murata;M. Yamanaka;S. Mori;Jun-ichi Hamada;H. Hashiguchi;Y. I. Tauhid;Tien Sribimawati;Budi Suhardi
本文描述了2001年5月至2002年4月利用GMS IR1传感器在苏门答腊岛(全长约1500公里)上空观测到的系统云系迁移的日周期。下午，对流云在山区上空发展，并从午夜到早晨向西和/或向东移动了数百公里(∼500公里)。除了8月份，几乎每个月都有向西迁徙的现象发生在最南端的苏门答腊岛上。当对流层低层风为西风和/或超云团沿热带辐合带(ITCZ)向东移动时，就会发生东迁，热带辐合区(ITCZ)是一年周期的南北移动。
This paper describes a diurnal cycle in systematic cloud system migration observed with the GMS IR1 sensor over Sumatera (approximately 1,500 km in length) from May 2001 to April 2002. Convective clouds developed over mountainous areas in the afternoon, and migrated westward and/or eastward for several hundred kilometers (∼ 500 km) from midnight to morning. Westward migration occurred in almost every month except August over southernmost Sumatera Island. Eastward migration occurred when lower-tropospheric winds were westerly and/or when super cloud clusters moved eastward along the Intertropical Convergence Zone (ITCZ), which moves northward and southward with an annual cycle.