Differences in Mechanisms of Orographic Rainfall over West Sumatra (Case Study: 10 April and 23 April 2004)

Authors

  • Wendi Harjupa The National Institute of Aeronautics and space of Indonesia, Indonesia., Indonesia https://orcid.org/0000-0002-8776-6978
  • Toyoshi Shimomai Remote Sensing Laboratory, Shimane University, Japan, Japan
  • Hiroyuki Hashiguchi Research Institute for Sustainable Humanosphere, Kyoto University, Japan, Japan https://orcid.org/0000-0001-8033-0955
  • Yasushi Fujiyoshi Institute of Low Temperature Science, Hokkaido University, Japan, Japan
  • Masayuki Kawashima Institute of Low Temperature Science, Hokkaido University, Japan, Japan

DOI:

https://doi.org/10.25077/jif.13.1.8-17.2021

Abstract

Two different mechanisms of orographic rainfall enhancement  in West Sumatra were investigated utilizing observed data during the Coupling Processes in the Equatorial Atmosphere (CPEA)-I campaign. The variation of the atmospheric conditions during the campaign was shown by rainfall, surface wind, humidity, and stability index. An X-band Doppler radar captured the atmospheric conditions related to the enhancement of orographic rainfall mechanisms. The dry and less stable atmospheric conditions resulted in the convective type of rainfall. In contrast, the humid and stable atmospheric conditions brought the large-scale rainfall in the mountainous region where the events took place coincided with the inactive and active MJO phases.

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Author Biography

Wendi Harjupa, The National Institute of Aeronautics and space of Indonesia, Indonesia.

The Science Center for Atmosphere and Technology

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Published

2021-02-28

How to Cite

Harjupa, W., Shimomai, T., Hashiguchi, H., Fujiyoshi, Y., & Kawashima, M. (2021). Differences in Mechanisms of Orographic Rainfall over West Sumatra (Case Study: 10 April and 23 April 2004). JURNAL ILMU FISIKA, 13(1), 8–17. https://doi.org/10.25077/jif.13.1.8-17.2021

Issue

Vol. 13 No. 1 (2021): March 2021

Section

Research Article

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