Diurnal Cycle of Cloud System Migration over Sumatera Island

Namiko SAKURAI; Fumie MURATA; Manabu D. YAMANAKA; Shuichi MORI; Jun-Ichi HAMADA; Hiroyuki HASHIGUCHI; Yudi Iman TAUHID; Tien SRIBIMAWATI; Budi SUHARDI

doi:10.2151/jmsj.83.835

Articles

Diurnal Cycle of Cloud System Migration over Sumatera Island

Namiko SAKURAI, Fumie MURATA, Manabu D. YAMANAKA, Shuichi MORI, Jun-Ichi HAMADA, Hiroyuki HASHIGUCHI, Yudi Iman TAUHID, Tien SRIBIMAWATI, Budi SUHARDI

Author information

Namiko SAKURAI
Graduate School of Science and Technology, Kobe University
Fumie MURATA
Research Institute for Human and Nature, Kyoto
Manabu D. YAMANAKA
Graduate School of Science and Technology, Kobe University
Institute of Observational Research for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokohama
Shuichi MORI
Institute of Observational Research for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokohama
Jun-Ichi HAMADA
Institute of Observational Research for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokohama
Hiroyuki HASHIGUCHI
Research Institute for Sustainable Humanosphere, Kyoto University, Uji
Yudi Iman TAUHID
Agency for the Assessment and Application of Technology, Jakarta Pusat
Tien SRIBIMAWATI
Agency for the Assessment and Application of Technology, Jakarta Pusat
Budi SUHARDI
Indonesian Meteorological and Geophysical Agency, Jakarta Pusat

JOURNAL FREE ACCESS

2005 Volume 83 Issue 5 Pages 835-850

DOI https://doi.org/10.2151/jmsj.83.835

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Abstract

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.

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