SERODJA, CANDISUKMA MARSHA (2022) ANALISA PENGARUH ANGIN MONSOON TIMUR TERHADAP ARUS PERMUKAAN BERDASARKAN DATA HF RADAR DI PERAIRAN SELAT SUNDA (22o318). Undergraduate thesis, Universitas Diponegoro.

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Abstract

ABSTRAK
Candisukma Marsha Serodja. 26050118120003. Analisa Pengaruh Angin
Monsoon Timur terhadap Arus Permukaan Berdasarkan Data HF Radar di Perairan
Selat Sunda (Aris Ismanto dan Aradea R Hakim).
Selat Sunda merupakan salah satu perairan yang cukup penting dalam
sirkulasi massa air di Indonesia, kondisi fisik perairan ini sangat dinamis dan
dipengaruhi oleh sistem arus di Laut Jawa dan Samudera Hindia. Informasi
mengenai arus permukaan laut dapat berguna sebagai acuan dalam mendukung
berbagai aktifitas maritim. High Frequency Radar merupakan salah satu instrumen
yang mampu mengukur arus permukaan dengan gelombang radio dari jarak jauh
secara real time dan kontiyu dengan resolusi spasial dan temporal. Penelitian ini
bertujuan untuk mengidentifikasi pengaruh angin monsoon timur pada pola arus
permukaan di Perairan Selat Sunda. Data pengukuran arus total dari HF Coastal
Ocean Dynamics Application Radar (CODAR) dan data angin diperoleh dari situs
European Centre for Medium-Range Weather Forecasts (ECMWF) periode bulan
Mei – Juli 2019. Analisis harmonik dilakukan pada arus permukaan untuk
memisahkan arus harmonik dan arus non-harmonik (residu) pada kedua titik
evaluasi. Hasil penelitian menunjukkan arus permukaan di Selat Sunda
teridentifikasi dominan dibangkitkan oleh pasang surut dengan nilai persentase arus
harmonik (pasang surut) lebih besar dari arus residu pada masing-masing
komponen zonal dan meridional. Pola arah arus residu (non pasut) bergerak menuju
barat daya akibat adanya pengaruh gradien tekanan serta topografi dasar perairan
Selat Sunda. Nilai korelasi arus residu dengan angin menunjukkan tingkat
hubungan yang lemah, sehingga arus permukaan di perairan Selat Sunda pada
kedua titik evaluasi tidak dipengaruhi oleh angin monsoon timur.
Kata kunci: HF Radar, Arus Permukaan, Angin, Selat Sunda

ABSTRACT
Candisukma Marsha Serodja. 26050118120003. Analysis of The Effect of East
Monsoon Wind on Sea Surface Currents Based on HF Radar Data in Sunda Strait
Waters (Aris Ismanto dan Aradea R Hakim).
The Sunda Strait is one of the waters that is quite important in the circulation
of water masses in Indonesia, the physical condition of these waters is very dynamic
and influenced by the current system in the Java Sea and the Indian Ocean.
Information about sea surface currents can be useful as a reference in supporting
various maritime activities. High Frequency Radar is an instrument capable of
measuring surface currents with radio waves from a distance in real time and
continuously with spatial and temporal resolution. This study aims to identify the
effect of the east monsoon wind on surface current patterns in the waters of Sunda
Strait. Total current measurement data from the HF Coastal Ocean Dynamics
Application Radar (CODAR) and data obtained from the European Center for
Medium-Range Weather Forecasts (ECMWF) website for the period May – July
2019. Harmonic analysis was carried out on sea surface currents to separate
harmonic currents and non-harmonic (residual) currents at both evaluation points.
The results showed that the surface currents in the Sunda Strait were identified as
dominantly generated by the tides with the percentage value of harmonic currents
(tidal) greater than the residual currents in each zonal and meridional components.
The pattern of residual (non-tidal) currents moves towards the southwest due to the
influence of pressure gradients and the bottom topography of the Sunda Strait
waters. The correlation value of residual currents with the wind shows a weak level
of relationship, so that the surface currents in the waters of the Sunda Strait at both
evaluation points are not affected by the east monsoon wind.
Keywords: HF Radar, Surface Current, Wind, Sunda Strait

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