Sheehan, PMF and Webber, BGM and Sanchez-Franks, A and Matthews, AJ and Heywood, KJ and Vinayachandran, PN (2020) Injection of Oxygenated Persian Gulf Water Into the Southern Bay of Bengal. In: Geophysical Research Letters, 47 (14).
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Abstract
Persian Gulf Water (PGW) is an oxygenated, high-salinity water mass that has recently been detected in the Bay of Bengal (BoB). However, little is known about the transport pathways of PGW into the BoB. Ocean glider observations presented here demonstrate the presence of PGW in the southwestern BoB. Output from an ocean reanalysis product shows that this PGW signal is associated with a northward-flowing filament of high-salinity water. Particle tracking experiments reveal two pathways: one in the eastern Arabian Sea that takes a minimum of 2 years and another in the western Arabian Sea that takes a minimum of 3 years. The western pathway connects to the BoB via equatorial currents. The greatest influx of PGW occurs between 82° and 87°E during the southwest monsoon. We propose that injection of PGW to the BoB oxygen minimum zone (OMZ) contributes to keeping oxygen concentrations in the BoB above the level at which denitrification occurs. ©2020. The Authors.
| Item Type: | Journal Article |
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| Publication: | Geophysical Research Letters |
| Publisher: | Blackwell Publishing Ltd |
| Additional Information: | The copyright of this article belongs to Blackwell Publishing Ltd |
| Keywords: | Earth sciences; Geophysics, Bay of Bengal; Eastern Arabian Sea; Ocean gliders; Oxygen concentrations; Oxygen minimum zone; Particle tracking; Southwest monsoon; Transport pathways, Oxygen, air-sea interaction; concentration (composition); denitrification; equatorial dynamics; experimental study; observational method; oxygen minimum layer; oxygenation; salinity; tracking; water mass, Arabian Sea; Bay of Bengal; Indian Ocean; Persian Gulf |
| Department/Centre: | Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences |
| Date Deposited: | 28 Aug 2020 10:28 |
| Last Modified: | 28 Aug 2020 10:28 |
| URI: | http://eprints.iisc.ac.in/id/eprint/66253 |
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