DAMPAK SIKLON TROPIS FRANCES TERHADAP UPWELLING LAUT TIMOR DAN SEKITARNYA

  • Adelina Lumban Gaol Sekolah Tinggi Meteorologi Klimatologi dan Geofisika
  • Ejha Larasati Siadari Sekolah Tinggi Meteorologi Klimatologi dan Geofisika
  • Muhammad Ryan Sekolah Tinggi Meteorologi Klimatologi dan Geofisika
  • Aries Kristianto Sekolah Tinggi Meteorologi Klimatologi dan Geofisika
Keywords: tropical cyclone, chlorophyl-a, sea surface temperature, upwelling

Abstract

The impacts of tropical cyclone are rainfall, strong wind, and flood. On the other hand, tropical cyclone becomes one of the factors that trigger the vertical mixing and upwelling that lead to increased fertility. Research on the impact of tropical cyclones on chlorophyll-a concentrations in Indonesian is still limited. This study aims to determine the effect of tropical cyclones on upwelling in the waters of the Timor Sea and its surroundings. Data used is daily composite of chlorophyll-a concentration, sea surface temperature, monthly of chlorophyll-a concentration, sea surface temperature, wind velocity and direction period May 2002 - May 2016. The method used in this study is the analysis of spatial and temporal  of chlorophyll-a concentration, sea surface anomaly, sea surface temperature, wind velocity and direction. A daily composite analysis of the concentration of chlorophyll-a shows that the area traversed by Frances tropical cyclones have increased fertility but with different responses to the observation area. The value of chlorophyll-a concentration before cyclone occurred between <0.2 mg / m3 - 1.0 mg / m3 and increased of 0.4 mg / m3 - 5.0 mg / m3. While anomalous result of sea level rise shows that at the time of the occurrence of tropical cyclones there is a positive anomaly ranging from 0.4 to 0.7 meters in the region around the center of tropical cyclone. This is caused by a decrease in pressure that causes the movement of the rising water mass to the surface (upwelling). Sea surface temperature showed a decrease with the highest decline 2.0oC within 1 - 4 days post tropical cyclone Frances.

Published
2019-04-29
How to Cite
Gaol, A., Siadari, E., Ryan, M., & Kristianto, A. (2019, April 29). DAMPAK SIKLON TROPIS FRANCES TERHADAP UPWELLING LAUT TIMOR DAN SEKITARNYA. Jurnal Meteorologi Klimatologi Dan Geofisika, 5(3), 37-45. Retrieved from https://jurnal.stmkg.ac.id/index.php/jmkg/article/view/73