Sebaran Salinitas Pada Saat IOD Positif Tahun 2019 di Perairan Provinsi Bengkulu

Septi Johan; Supiyati Supiyati; Suwarsono Suwarsono

doi:10.31540/sjpif.v5i1.2222

Septi Johan Jurusan Fisika, Fakultas MIPA, Universitas Bengkulu
Supiyati Supiyati Jurusan Fisika, Fakultas MIPA, Universitas Bengkulu, Bengkulu, Indonesia
Suwarsono Suwarsono Jurusan Fisika, Fakultas MIPA, Universitas Bengkulu, Bengkulu, Indonesia

DOI: https://doi.org/10.31540/sjpif.v5i1.2222

Keywords: Zonal Current, IOD, Hӧvmuller, Salinitas, Temperature

Abstract

This study aims to look at the distribution of salinity in the waters of Bengkulu Province during the strong positive IOD events that occurred in 2019. The research area is the Bengkulu Province region which is in position a using in-depth zonal current data, in-depth temperature data and salinity data. To see the distribution map, this data is then processed using GrADS (The Grid Analysis and Display System) software. The analysis used in this study is the Hӧvmuller diagram analysis. Based on the results of the study during a positive IOD it was seen that there was a movement of deep zonal currents. These zonal currents carry low-temperature water masses from the deep layers to the surface layers. Prior to the occurrence of a positive IOD, the salinity value in Bengkulu Province waters varied between . When a positive IOD occurs, the salinity value in Bengkulu Province waters rises to and is almost uniform.

References

Atsari, R., .(2013). Studi Variabilitas Tinggi Muka Air Laut di Perairan Selatan Indonesia.Tugas Akhir Program Sarjana. Program Studi Oseanografi: Institut Teknologi Bandung.

Iskandar, I.(2012). The Role of Equatorial Oceanic Wave in the Activation of the 2006 Indian Ocean Dipole, J.Sci, Vol: 44A, No: 2,113-128.

Iskandar, I., Mardiansyah, W., Setiabududaya, D., Poerwono, P., Kurniawati, N., Syamsudin,F. dan Nagura, M. (2014). Equatorial Oceanic Waves and the Evolution of 2007 Positive Indian Ocean. Terr. Atmos. Ocean. Sci, Vol: 25, No:6, 847-856.

Johan, S.(2016).evolusi indian ocean dipole (iod) positif tahun 2006 di lapisan bawah permukaan. Tesis. Program Studi Oseanografi: Institut Teknologi Bandung.

Rao, S.A., Behera, S.K., Masumoto, Y, dan T.Yamagata. (2002). Interannual Subsurface Variability in the Tropical Indian Ocean with a Special Emphasis on the Indian Ocean Dipole, Deep-Sea Res., 49, pp.1549-1572.

Rao, S. A. and T. Yamagata. (2004). Abrupt termination of Indian Ocean dipole events in response to intraseasonal disturbances. Geophys. Res. Lett., 31, L19306, doi: 10.1029/2004GL020842.

Vinayachandran, P. N., Lizuka, S, and T. Yamagata.(1999).Indian Ocean D ipole event in an Ocean General Circulation Model. Deep-Sea Research II. No:49, 1573-1596.

Vinayachandran, P. N., N. H. Saji, and T. Yamagata.(2002).Response of the Equatorial Indian Ocean to an unusual wind event during 1994. Geophys. Res. Lett., 26, 1613-1616, doi: 10.1029/1999GL900179.