SEA SURFACE TEMPERATURE (SST) COMPARISON FROM INSITU AND ESTIMATION MEASUREMENT AT CENDERAWASIH BAY PAPUA, INDONESIA

Abstract

The Bird’s Head Seascape (BHS) of Papua is home to the world’s most diverse coral reefs. Increasing ocean temperatures linked to climate change increased frequency and intensity of coral bleaching. Bleaching risk is usually assessed using SST from satellite but may not reflect local scale temperature patterns. Monitoring SST at BirdHead Seascape has been done since September 2005 through program Ecosystem Base Management - BirdHead Seascape (EBM BHS) that initiatived by Conservation International Indonesia (CII), The Nature Conservancy (TNC), and World Wild Fund (WWF). There are 53 logger HOBOware Pro logger installed in depth 3 and 20 meter at Raja Ampat and Jamursba Medi, 19 at Biak and Cenderawasih Bay, and 6 at Triton Bay, Kaimana. Using logger (insitu) is believed to be more accurate compare to satellite measurement, however area that covered with this method is limited. Hence there is a need of using a technique to get a SST value more accurate but can cover wide area. One of method is repair algorithm used in satellite image processing. Before stepping into the process a validation is needed to compare satellite image with insitu measurement. In general, SST from satellite NOAA measurement is lower compared with logger and Buoy Tao. Meanwhile, SST from HOBOware Pro Logger and Buoy Tao are not significantly different. The difference between maximum value of NOAA and logger is 4.18 o C, with its minimum of 0.87 o C and average is 2.69 o C. While NOAA compare to Buoy Tao the maximum value is 4.45 oC, minimum is 0.08 oC, with average difference value is 2.53 oC.