IDENTIFICATION OF THERMAL FRONT IN INDONESIAN WATERS DURING 2007 - 2017
Afif Prabowo Jatiandana (a*) and Susanna Nurdjaman (a)

(a) Oceanography_Earth Science Department, Faculty of Earth Science and Technology (FEST), Bandung Institute of Technology (ITB), Jl. Ganesha 10, Bandung 40132, Indonesia

*afifprabowoj[at]gmail.com
*afifpj[at]students.itb.ac.id

Abstract

Indonesia is a region that is directly adjacent to the Pacific Ocean and the Indian Ocean which allows a thermal front phenomenon. The purpose of this study is to identify the presence of thermal fronts based on seasonal variations and inter-annual variations in Indonesia. The data are Sea Surface Temperature (SST), Ocean Nino Index (ONI), and Dipole Mode Index (DMI) with a span of time from January 2007 - December 2017 (11 years). The SST data is a level 3 Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) satellite image data with a resolution of 4 km. SST data processing uses remote sensing techniques and Geographic Information System (GIS). The results of this study indicate that the distribution of SST and thermal fronts are influenced by seasonal variations and inter-annual variations. The highest average thermal front event in Indonesian waters occurred in a combination of El-Nino and Positive IOD conditions. The highest average thermal front incidence in Indonesian waters also occurred during the East Season, while the smallest average occurred during the Transition Season II. During West Season, Transition Season II, and East Season, the largest number of thermal fronts was found in Western Indonesian Waters. Meanwhile, in the Transition Season I, the largest number of thermal fronts was found in Central Indonesian Waters.

Keywords: thermal front, SST, remote sensing, seasonal and inter-annual variations

Topic: Marine Geodesy and Satellite Oceanography

Link: https://ifory.id/abstract-plain/XJbgxF2hDPdY

Web Format | Corresponding Author (Afif Prabowo Jatiandana.)