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Gowthaman, V.
- Initial set of oceanographic data from Bay of Bengal using an underwater glider as mobile sensor node
Abstract Views :293 |
PDF Views:121
Authors
Shijo Zacharia
1,
R. Seshasayanan
1,
V. Gowthaman
2,
S. Muthukumaravel
2,
Tata Sudhakar
2,
M. A. Atmanand
2
Affiliations
1 College of Engineering, Guindy Campus, Anna University, Chennai 600 025, IN
2 National Institute of Ocean Technology, Ministry of Earth Sciences, Pallikaranai, Chennai 600 100, IN
1 College of Engineering, Guindy Campus, Anna University, Chennai 600 025, IN
2 National Institute of Ocean Technology, Ministry of Earth Sciences, Pallikaranai, Chennai 600 100, IN
Source
Current Science, Vol 109, No 5 (2015), Pagination: 918-929Abstract
Underwater gliders measure high-resolution spatiotemporal oceanographic data. However, glider operations have not been carried out in the Indian Ocean region so far. In September 2013, the National Institute of Ocean Technology, Chennai introduced a mobile sensor node, the underwater glider ‘Barathi’, for observation in the Bay of Bengal (BoB). Herein we address ballasting procedure of the glider operated in highly variable density waters of the BoB. The temperature and conductivity data collected by us are strongly correlated with commercially available instrument with coefficient of determination R2 > 0.97. This article reports results from a long-duration (127 days) mission in 2014. The variation of temperature, salinity, density, sound velocity, mixed layer depth, sonic layer depth and lower cutoff frequency of surface duct along 13°N lat. and between 80.76°E and 86.28°E long. are also presented. The results show a trace of the East Indian Coastal Current. The glider operations demonstrate a novel in situ observation platform in the BoB.Keywords
Mobile sensor node, oceanographic data, underwater glider, underwater acoustics.Full Text
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- Ocean Current Mapping with Indigenous Drifting Buoys
Abstract Views :145 |
PDF Views:83
Authors
Affiliations
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
Source
Current Science, Vol 118, No 11 (2020), Pagination: 1778-1781Abstract
Ocean current transports mass and energy around the world and it is the driving force of climate and it regulates local weather. Drifting buoy plays an important role in mapping world’s ocean water circulations and its study. The National Institute of Ocean Technology (NIOT), MoES, Chennai has indigenized drifting buoy with the Indian Satellite (INSAT) telemetry and global positioning system receiver to acquire geo-positional updates to precisely calculate ocean’s mixed layer surface current. The drifting buoy acquires hourly positional data (24 data/day) compared to ARGOS drifters which has limited pass in Indian tropical regions. The NIOT deployed drifting buoy in the Bay of Bengal and the Arabian Sea during monsoon seasons of 2012–2019 to study the Indian Ocean currents. This article reports about the mixed layer surface currents mapped by the indigenous drifting buoy in the Bay of Bengal.Keywords
Drifting Buoy, GPS Receiver, Mixed Layer Surface Currents, Mesoscale Eddies.Full Text
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