Electronic Theses and Dissertation

Eddies memainkan peran penting dalam dinamika oseanografi karena memengaruhi suhu, distribusi nutrisi, dan biota laut. Penelitian ini bertujuan untuk mendeteksi dan mengidentifikasi eddies di perairan Andaman pada Februari dan Agustus 2024 menggunakan data dari Copernicus Marine Environment Monitoring Service (CMEMS). Identifikasi dilakukan melalui analisis visual Sea Level Anomaly (SLA), arus geostrofik, dan Sea Surface Temperature (SST), serta penerapan algoritma PyEddyTracker untuk melacak dan mengklasifikasikan eddies berdasarkan tipe, lokasi pusat, arah rotasi, dan kecepatan arus. Hasil menunjukkan bahwa pada Februari 2024 terdeteksi enam eddies (tiga siklonik dan tiga antisiklonik), sementara pada Agustus 2024 hanya tiga eddies (dua siklonik dan satu antisiklonik). Kecepatan arus geostrofik cenderung rendah di pusat eddies (0,10–0,15 m/s) dan meningkat di sekitarnya, mencapai maksimum 0,50 m/s pada Februari dan 0,45 m/s pada Agustus. SLA di pusat eddies siklonik lebih rendah, sedangkan pada eddies antisiklonik lebih tinggi akibat dinamika divergensi dan konvergensi massa air. Tidak ditemukan penurunan suhu signifikan di pusat eddies, SST tetap hangat dan stabil (28,4°C–30,7°C), mengindikasikan proses upwelling atau downwelling yang lemah.


Kata Kunci: Eddies, Sea Level Anomaly (SLA), Siklonik, Musim, Laut Andaman

Eddies play a significant role in oceanographic dynamics as they influence temperature, nutrient distribution, and marine biota. This study aims to detect and identify eddies in the Andaman Sea during February and August 2024 using data from the Copernicus Marine Environment Monitoring Service (CMEMS). The identification was performed through visual analysis of Sea Level Anomaly (SLA), geostrophic currents, and Sea Surface Temperature (SST), as well as by applying the Py_eddy_tracker algorithm to track and classify eddies based on type, center location, rotation direction, and current velocity. The results show that in February 2024, six eddies were detected (three cyclonic and three anticyclonic), while in August 2024, only three eddies were found (two cyclonic and one anticyclonic). The geostrophic current velocities were generally low at the eddies centers (0.10–0.15 m/s) and increased towards the peripheries, reaching a maximum of 0.50 m/s in February and 0.45 m/s in August. SLA values were lower at the centers of cyclonic eddies and higher in anticyclonic ones due to the dynamics of mass divergence and convergence. No significant decrease in temperature was observed at the eddies centers, with SST remaining warm and stable (28.4°C–30.7°C), indicating weak upwelling or downwelling processes. Keywords: Eddies, Sea Level Anomaly (SLA), Cyclonic, Seasons, Andaman Sea