The influence of monsoon on mixed layer depth in the northern waters of Aceh in 2017

Abstract

Abstract The research was conducted by considering the values of temperature, mixed layer depth (MLD) as a result of the analysis, and sea-level winds in the waters of North Aceh. MLD was analyzed from the results of the three-dimensional Copernicus marine environment monitoring service (CMEMS) model, which has been validated with sea surface temperature (SST) data from the monthly Aqua MODIS. The results show that SST CMEMS is relatively the same as SST Aqua MODIS with variations up to 2°C. The verification of SST CMEMS data for February, April, August and October showed quite good results with a correlation value of r = 0.8523. Analysis in February, August, and October shows MLD is deepest. MLD in Aceh’s northern waters is 68-91 meters, and Sabang and Krueng Raya waters are 68-79 meters. However, MLD is at its most shallow in April. The waters of North Aceh is 49 meters, Sabang waters is 40 meters, and Krueng Raya is 9 meters. In February, the wind speed occurs in the northeast wind direction with a speed of 3.2 m/s. April and October occur in the direction of the transitional monsoon. The wind speed in April is 2.2 m/s, and October is 2.9 m/s. The southwest wind direction is 4.1 m/s in October. From these results, the influence of the monsoon wind is enormous in the waters of northern Aceh.