Electronic Theses and Dissertation

Selat Malaka adalah sebuah selat yang terletak diantara dua daratan besar yaitu pulau Sumatera dan semenanjung Malaysia yang berada pada 95°BT-103°BT, lokasi penelitian pada 2.4° LU. Data rata-rata anomali yang dikaji pada penelitian ini adalah pada fenomena musim peralihan yang kerap terjadi pada suatu perairan di setiap tahunnya. Penelitian ini dilakukan menggunakan metode korelasi. Anomali tinggi muka laut SSH adalah besarnya penyimpangan yang terjadi terhadap kondisi rata-rata tinggi muka laut. Anomali tinggi permukaan laut di pengaruhi oleh pasang surut, topografi, angin, arus laut, densitas dan tekanan air laut, serta faktor lainnya. Perubahan SPL pada perairan juga di sebabkan oleh upwelling, proses upwelling terjadi karena kekosongan massa air pada lapisan permukaan, akibat terbawa ke tempat lain oleh arus. Penelitian ini bertujuan memetakan serta mengkaji SSH (Sea Surface Height) dan temperatur di Selat Malaka, serta menginterprestasikan kondisi musim peralihan lalu menganalisis rata-rata anomali SSH dan temperatur berdasarkan data HYCOM tahun 2017. Kondisi Musim peralihan I pada lokasi penelitian 2.4°C SSH tertinggi pada bulan Mei mencapai 0,63m, SPL tertinggi pada bulan Mei mencapai 29,9-30,4°C. Musim peralihan II SSH tertinggi pada bulan November mencapai 0,66-0,68m. Sedangkan SPL di bulan Oktober dengan suhu 29,9-30,1°C. Hasil analisis rata-rata anomali menyatakan bahwa musim peralihan I SSH bernilai negatif yang berarti penyimpangan bersifat rendah, suhu permukaan laut bernilai positif. Masuk musim peralihan II SSH cenderung bernilai negatif pada Oktober dan November berbeda dengan bulan September anomali bernilai negatif. Suhu permukaan laut pada musim ini mendapatkan hasil negatif karena nilai maksimum lebih tinggi daripada nilai rata-rata.

The Malacca Strait is a strait that is located between two large landmasses, namely the island of Sumatra and the Malaysian peninsula which is located at 95°E-103°E, the research location is at 2.4°N. The average anomaly data studied in this study is the phenomenon of the transition season which often occurs in a waters every year. This research was conducted using the correlation method. SSH sea level anomaly is the magnitude of the deviation that occurs with the average sea level condition. Sea level anomaly is influenced by tides, topography, wind, ocean currents, density and pressure of sea water, as well as other factors. Changes in SST in a waters are also caused by upwelling, the upwelling process occurs due to the void of the water mass in the surface layer, due to being carried to other places by currents. This study aims to map and study the temperature in the Malacca Strait, as well as interpret the conditions of the transitional season and then analyze the average SSH anomaly and temperature based on HYCOM data in 2017. Conditions The transitional season I at the study site was 2.4°C, the highest SSH was in May reaching 0.63m, the highest SST was in May reaching 29.9-30.4°C. The highest SSH transition season II was in November reaching 0.66-0.68m. Meanwhile, SST is in October with a temperature of 29.9-30.1°C. The results of the analysis of the average anomaly state that the transition season I SSH is negative, which means that the deviation is low, the sea surface temperature is positive. Entering the transitional season II, SSH tends to have a negative value in October and November, in contrast to September, the anomaly is negative. The sea surface temperature in this season is negative because the maximum is higher than the average value.