Indonesia Conference Directory

The Lombok Strait that located between the island of Bali and Lombok is one of the seas in Indonesia that connects the Pacific Ocean and the Indian Ocean. Therefore, the characteristics of the Lombok Strait waters get influence from those oceans. In this research, the analysis of water masses in the Lombok Strait waters are investigated and analysed by using TS diagram. The main data used are temperature and salinity from the HYbrid Coordinate Ocean Model (HYCOM) model in 2011 – 2015 with 1/12 x 1/12 degree horizontal resolution and vertical resolution up to 1500 m. The TS diagram was used to identify water masses contribution in the Lombok Strait and the ocean heat content was calculated for each water masses. The Timor Sea Water (TSW) and Australasian Mediterranean Water (AAMW) contributed maximumly in thermocline layer with 65,85% of the total heat content (1,12 x 10^13 J/m2) and 24,46% (4,16 x 10^12 J/m2) in a row. Then, The Antartic Intermediate Water (AAIW) and Banda Intermediate Water (BIW) contributed maximumly in intermediate layer (500 – 1500 m) with 8,17% of total heat content (1,39 x 10^12 J/m2) and 1,52% (2,59 x 10^11 J/m2). In addition, each water masses influenced by El Nino Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD). The ocean heat content of TSW and BIW increased when El Nino and positive of IOD appeared and decreased during La Nina and negative of IOD. Conversely, The ocean heat content of AAMW and AAIW decreased when El Nino and positive of IOD appeared and increased during La-Nina and negative of IOD