Laporan Usulan Penelitian 2015: APPLYING NUCLEAR TECHNOLOGY TO ENHANCE CLIMATE CHANGE RESEARCH AND SUPPORT AN OBSERVATION FOR CORALS (TC-INS7006)

Massive corals of Porites provide explanation! Indonesia Coral region of Indonesia i.e; Nusa Penida-Lombok Strait Triangle Initiative (Bali), Bunaken (North Sulawesi), Selayar islands (South (CTI) zone Sulawesi) and Lombok (West Nusa Tenggara). All lndicator(s): samples were collected underwater using pneumatic Corals database- drill. Total samples are 26 cores with the length varied of Indonesia CTI from 0.5 m to 2.5 meter. All samples have been x-ray region radiographed for determining the age and linear extension rates. Based on the x-ray images, mostly all corals have reduced linear extension rates due to increasing Sea Surface Temperature (SST) related to climate change. Some of coral samples show that linear extension rates reduced significantly during the El-nino events. One coral core (20 cm from top) from Nusa Penida, Bali has been analyzed for stable isotopes (0-18 and C-13) using IRMS (Isotopes Ratio Mass Spectrometer) and ratio Sr/Ca and Mg/Ca using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometer) during the Fellowship (FE INS12020) in Hokkaido University, Japan. The purpose of FE was the methodology of determining stable isotopes and trace elements in coral related to climate change (SST and Salinity). For supporting the research, several sediments core near the coral locations have been collected and analyzed the sedimentation rates using environmental sotope Pb-21 O with the equipment alpha spectrometers (EQ from the Project). Meanwhile, ICP-OES (EQ from he Project) has been calibrated and tested and it will be used for analyzing trace elements Ca and Sr related to cllmate change for all samples from CTI region of Indonesia.