Pemetaan Suhu Permukaan Laut (SPL) dan Karakteristik Pasang Surut di Perairan Pulau Bali, Indonesia

Abstract

Dalam bidang oseanografi beberapa fenomena laut dapat dilihat menggunakan peta Suhu Permukaan Laut (SPL). Selain SPL, kondisi pasang surut juga penting untuk diketahui karena menggambarkan karakteristik suatu perairan. Penelitian ini bertujuan untuk mengetahui variasi SPL dan karakteristik pasang surut di perairan pulau Bali, Indonesia. Data SPL diperoleh dari National Oceanic and Atmospheric Administration (NOAA) pada 2015 – 2017 dan data pasang surut diperoleh dari Badan Informasi Geospasial (BIG) pada bulan Juni 2017 dengan interval data satu jam. Dari hasil percobaan menggunakan metode Admiralty menunjukkan bahwa tipe pasang surut di perairan pulau Bali, Indonesia tergolong Campuran dengan kecendurungan Semi Diurnal dengan bilangan Formzahl sebesar 1.01 (0.25 < F £ 1.5). Kemudian parameter elevasi Highest High Water Level (HHWL) dan Lowest Low Water Level (LLWL) yang diperoleh dari perhitungan sebesar 1.0512 dan -1.0504 meter. Selanjutnya pengolahan data SPL menunjukkan pada Juni 2015 (Musim Kemarau) nilai SPL berkisar 24.05 – 29.11 oC dengan rata-rata sebesar 27.73 oC. Kemudian pada Desember 2016 (Musim Penghujan) nilai SPL berkisar 22.96 – 28.87 oC dengan rata-rata sebesar 27.00 oC. Selanjutnya pada Februari 2017 (Musim Penghujan) nilai SPL berkisar 23.36 – 30.4 oC dengan rata-rata sebesar 27.20 oC. Sehingga dapat disimpulkan bahwa SPL di perairan Pulau Bali pada musim penghujan cenderung lebih rendah dibandingkan musim kemarau. Secara umum wilayah bagian utara pulau Bali cenderung memiliki suhu lebih tinggi dibandingkan dengan perairan bagian selatan.

Characteristics of North Pacific water masses in the Bali Sea

“…The surface temperature values for the mixed layer on all transects are 26,27-30,97°C. This result is quite in line with the research conducted by Prayogo and Natul [5], which stated that the northern region of Bali has a surface temperature of around 27-30°C, which is the highest area than the eastern and southern regions of the island. According to Habibie and Nuraini [6], the change in temperature to depth in the mixed layer is very small.…”

Study on Implementation of Limited Protection Rules For Banggai Cardinalfish (Pterapogon kauderni) Which Is Transported Through The Province of Bali

“…This potential has been seen from the existence of business actors in the North Bali region and its surroundings who can breed the Banggai cardinalfish to their economic size for trading. This is in line with the bioecological conditions of North Bali waters are similar to their natural habitat [10]. The stock to be traded does not originate from the exploitation of this biota from their natural habitat so business actors in the province of Bali have great hopes to return to exporting the Banggai cardinalfish type of marine ornamental fish resulting from cultivation, given the high market demand for one type of Indonesian mascot ornamental fish for both domestic trade and export purposes.…”

“…the waters in North Bali resemble condition of the bioecological conditions of the natural habitat of the Banggai cardinalfish in the eastern part of Central Sulawesi which has shallow sea waters. The northern temperatures waters of Bali are higher than the southern, reaching a range of 27 to 29 0 C [10].…”

Characteristics of internal waves in the Bali Sea from Sentinel-1A data and ocean modeling

“…The waters in the Bali region have a mixed tidal type that tends to be semi-diurnal, with two high tides and two low tides occurring in a single day [16]. In the Lombok Strait region, the tidal is dominated by the M2 diurnal tidal component and K1 semi-diurnal tidal component.…”