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PENGARUH VARIABILITAS IKLIM ENSO (EL NINO SOUTHERN OSCILLATION) DAN IOD (INDIAN OCEAN DIPOLE) TERHADAP KETEBALAN LAPISAN TERMOKLIN DI PERAIRAN SELAT BALI(22o411)

RACHMAN, GEORGINA FAULIA (2022) PENGARUH VARIABILITAS IKLIM ENSO (EL NINO SOUTHERN OSCILLATION) DAN IOD (INDIAN OCEAN DIPOLE) TERHADAP KETEBALAN LAPISAN TERMOKLIN DI PERAIRAN SELAT BALI(22o411). Undergraduate thesis, Universitas Diponegoro.

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Abstract

ABSTRAK
Georgina Faulia Rachman. 2605011812024. Pengaruh Variabilitas Iklim ENSO
dan IOD terhadap Lapisan Termoklin di Perairan Selat Bali. (Anindya
Wirasatriya dan Heryoso Setiyono)
Selat Bali merupakan perairan semi tertutup yang menghubungkan Laut
Bali di bagian utara dan Samudera Hindia di bagian selatan. Perairan ini juga
memisahkan Pulau Jawa di sisi barat dan Pulau Bali di sisi timur. Lapisan termoklin
merupakan lapisan perairan laut yang dicirikan terjadi penurunan temperatur yang
cepat terhadap kedalaman. Kedalaman termoklin merupakan parameter fisis lautan
yang letaknya bisa berubah-ubah secara vertikal. Pada penelitian ini bertujuan
untuk mengkaji lapisan termoklin yang terdapat di selat Bali dan melihat
terdapatnya pengaruh dari variabilitas iklim ENSO dan IOD dengan menggunakan
data angin, ONI, DMI dan vertikal temperatur dalam jangka waktu 11 tahun (2010-2020). Ditemukan lapisan termoklin pada bagian utara dan selatan di perairan Selat
Bali dengan hasil ketebalan saat kondisi La Niña (2011) sebesar 119,5m, El Niño
(2016) sebesar 50m, IOD (+) 2017 sebesar 100,5m dan IOD (-) 2019 sebesar
150,2m pada bagian utara. Sedangkan bagian selatan saat kondisi La Niña (2011)
sebesar 190,5m, El Niño (2016) sebesar 19,5m, IOD (+) 2017 sebesar 106,5m dan
IOD (-) 2019 sebesar 90,5m. Pada tahun 2016 terjadi peristiwa pendangkalan pada
batas bawah di bagian selatan. Peristiw ini disebabkan karena menguatnya arus
lintas Indonesia yang diduga menekan batas atas sehingga lapisan tersebut
mengalami pendalaman.
Kata kunci : Perairan Selat Bali, lapisan termoklin, ENSO dan IOD

ABSTRACT
Georgina Faulia Rachman. 2605011812024. The Effect on Climate Variations of
ENSO and IOD on the Thickness of the Thermocline Layer in Bali Strait Waters.
(Anindya Wirasatriya and Heryoso Setiyono)
The Bali Strait is a semi-enclosed water that connects the Bali Sea in the
north and the Indian Ocean in the south. These waters also separate the island of
Java on the west side and the island of Bali on the east side. The thermocline layer
is a layer of marine waters which is characterized by a rapid decrease in
temperature with depth. The depth of the thermocline is a physical parameter of the
ocean whose location can vary vertically. This study aims to examine the
thermocline layer in the Bali strait and see the influence of ENSO and IOD climate
variability using wind, ONI, DMI and vertical temperature data for a period of 11
years (2010-2020). Thermocline layers were found in the northern and southern
parts of the waters of the Bali Strait with thickness results under La Nia (2011)
conditions of 119.5m, El (2016) of 50m, IOD (+) 2017 of 100.5m and IOD (-) 2019
of 150.2m in the north. While the southern part during La Nia (2011) conditions
was 190.5m, El Niño (2016) was 19.5m, IOD (+) 2017 was 106.5m and IOD (-)
2019 was 90.5m. In 2016 there was a silting event at the lower boundary in the
southern part. This incident was caused by the strengthening of Indonesian traffic
flow, which allegedly suppressed the upper boundary so that the layer was
deepened.
Keywords : Bali strait waters, thermocline layers, ENSO and IOD

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Perairan Selat Bali, lapisan termoklin, ENSO dan IOD, Bali strait waters, thermocline layers, ENSO and IOD
Subjects: Fisheries And Marine Sciences
Divisions: Faculty of Fisheries and Marine Sciences > Department of Oceanography
Depositing User: pancasila wati
Date Deposited: 25 Jan 2023 02:02
Last Modified: 12 May 2023 08:50
URI: https://eprints2.undip.ac.id/id/eprint/11419

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