Kajian Suhu Permukaan Laut (SPL) Menggunakan Analisis Deret Waktu di Perairan Laut Banda
Abstract
ABSTRACT
Map of sea surface temperature is very important in the science of oceanography, some phenomena in the ocean can be seen by using it globally. One of them is in the form of upwelling events that occur in the Banda Sea, besides that, IOD and ENSO phenomena can occur because they are close to the Indian and Pacific Oceans. Time series analysis is used to predict possible phenomena that can occur in long SST variable data. The Fourier Transform analysis obtained from the study of sea surface temperature data produces temperature signals for the dominant annual (annual) and semi-annual (6 months) periods. The ENSO phenomenon also affects temperature variations that occur in the waters of the Banda Sea with the visible signal of the inter-annual period (2.8 years). The application of the SVD-based EOF method to SST data produces a dominant EOF mode which indicates that Arafura waters play a role in influencing the SST cycle that occurs in the Banda Sea.
Keywords: sea surface termperature, EOF methods, time series analysis, fourier analysis, Banda Sea
ABSTRAK
Peta suhu permukaan laut sangat penting dalam ilmu oseanografi, beberapa fenomena di laut dapat terlihat dengan menggunakannya secara global. Salah satunya berupa kejadian upwelling yang terjadi di Laut Banda, selain itu dapat berupa fenomena IOD dan ENSO, karena berada dekat dengan Samudera Hindia dan Pasifik. Analisis deret waktu (time series analysis) digunakan untuk memprediksi kemungkinan fenomena yang dapat terjadi pada data variabel SPL yang panjang. Analisis Fourier Transfom yang diperoleh dari kajian data suhu permukaan laut menghasilkan sinyal suhu periode dominan annual (tahunan) dan semi-annual (6 bulanan). Fenomena ENSO juga mempengaruhi variasi suhu yang terjadi di perairan Laut Banda dengan terlihatnya sinyal periode inter-annual (2.8 tahunan). Penerapan metode EOF berbasis SVD pada data SPL menghasilkan satu mode EOF dominan yang menunjukkan perairan Arafura berperan dalam mempengaruhi siklus SPL yang terjadi di Laut Banda.
Kata kunci: suhu permukaan laut (SPL), metode EOF, analisis deret waktu, analisis fourier, Laut Banda
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DOI: https://doi.org/10.21107/jk.v15i3.14386
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Published by: Department of Marine Sciences, Trunojoyo University of Madura