Font Size: 

The Banggai waters are characterized by strong water productivity and are impacted by the Banda Sea and the Maluku Sea. This circumstance makes Banggai waters one of the most productive fishing grounds in the world. Banggai's water productivity cannot be separated from oceanic influences such as the upwelling phenomenon. Upwelling is an important process that transports nutrients to biological systems linked with food webs in the water column. There are numerous indicated upwelling regions in Indonesia, one of which is in the western Maluku Sea waters near Banggai. This study intends to investigate the characteristics of the upwelling phenomena by analyzing the historical fertility of Banggai waters via two key indicators, namely sea surface temperature (SST) and chlorophyll-a using satellite imagery data. The analysis was conducted with a data spatial resolution of 4 kilometers using Sea Surface Temperature (NOAA AVHRR Pathfinder Version 5.3 Collated Global) and Chlorophyll a concentration (Ocean Color SMI) data. The results of the chlorophyll-a dispersion pattern from 1998 to 2022 were collected in August 2004, 2006, and 2015 at a temperature of 27°C. This is related to the El-Nino period; El-Nino displayed a value of 0.6 in 2004, 0.5 in 2006, and 2.2 in 2015. Based on this study the chlorophyll-a distribution in Bangai was greatest during the El Nino period.