Invaluable CTD and Mixed Layer Depth data in northern coast of the Bay of Bengal

Published: 26 November 2020| Version 2 | DOI: 10.17632/v8gnfjgwmr.2
Contributors:
Md Masud-Ul-Alam,
Saif Khan Sunny,
Md Atiqur Rahman,
Md. Ashifur Rahman Shaheen,
Md. Bayzid Mahmud ,
Md. Ashif Imam Khan

Description

These CTD (Conductivity, Temperature, and Depth) profiles were collected with the help of the Bangladesh Navy by allowing boarded on BNS Sangu under the research project "Evaluation of Satellite-Derived Ocean Chlorophyll-a in the EEZ of Bangladesh" funded by the University Grant Commission, Bangladesh. The datasets contain the CTD profiles which ultimately give the vertical distributions of highly precise ocean temperature (°C), salinity (PSU), density (kg m-3), with the corresponding depth levels. The salinity and density were derived from the conductivity sensor and the depth further estimated by the pressure sensor, where it was considered as 1 dbar pressure almost equal to 1 m depth (in the shallow water). Later on, the Mixed Layer Depth was calculated based on the density threshold criteria where the density difference of 0.2 kg per cubic meter was considered to get the Mixed Layer Depth. Then the binary files (.srd) from the CTD (CTD90M HYDRO-BIOS Apparatebau GmbH, Germany) were processed as comma-separated-values (.csv) files by the data processing software SST-SDA provided by Sea & Sun Technology GmbH, Germany. However, these datasets were for 12 stations. The stations' latitude and longitude are attached here in a text file named "Station_information.txt". Mixed Layer Depth values are included in the MLD.txt file.

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