VARIABILITY OF CONCENTRATION CHLOROPHYLL – A AT ARU SEA IN 2003 – 2016

• Main Author: Imron Rosyadi, M.
• Format: Final Project
• Language: Indonesia
• Subjects: Geologi, hidrologi & meteorologi
• Online Access: https://digilib.itb.ac.id/gdl/view/72303
• Institution: Institut Teknologi Bandung

Aru Sea has a high fertility rate, viewed from the abundance of chlorophylla. This study aims to determine the variability of chlorophyll-a concentration in Aru Sea and connect with phenomenon like a wind, ENSO, and IOD. This study using MODIS Aqua satellite data level 3 start from 2003 to 2016. This researh divided two Zona that is A zone (along Kaimana Beach to Timika Beach) and B zone (along Timika Beach to Merauke Beach). The results show that the dominant periods of concentration of chlorophylla in A zone and B zone are 6-month periods and the period of 12-months. Concentration of chlorophyll-a at A zone has one peak type in one year, in June- August while B zone has two peak types in one year, in January-March and September-November. The value of concentration of chlorophyll-a at A zone in the temporal scale is high when the condition of SST is low with correlation is -0,57, while the concentration of chlorophyll-a at B zone is high when the condition of SST is high with correlation is 0,10. The concentration value of chlorophyll-a in the spatial scale at A zone is high due to upwelling, while at B zone high rainfall and debit impacts the flow. The correlation concentration value of chlorophyll-a with sea surface temperature in Aru Sea is strong enough, reaching -0.69. The influences of ENSO and IOD phenomenon in Aru Sea are low, with the correlation value of chlorophyll-a - DMI about 0,08 and the correlation value of chlorophyll-a - ONI about 0,03 and. Strong El Niño and positive IOD phenomenom influence the increasing concentration of chlorophyll-a. The high rainfall is assumed to cause a greater runoff of river water carrying nutrients to sea waters, that causes the high concentration