Injection of oxygenated Persian Gulf Water into the southern Bay of Bengal

Sheehan, Peter M F, Webber, Ben G M, Sanchez-Franks, Alejandra, Matthews, Adrian J, Heywood, Karen J and Vinayachandran, P N (2020) Injection of oxygenated Persian Gulf Water into the southern Bay of Bengal. Geophysical Research Letters. ISSN 0094-8276

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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 re-analysis 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 two years, and another in the western Arabian Sea that takes a minimum of three 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 OMZ contributes to keeping oxygen concentrations in the BoB above the level at which de-nitrification occurs.

Item Type: Article
Faculty \ School: Faculty of Science > School of Environmental Sciences
Faculty of Science > School of Mathematics
Depositing User: LivePure Connector
Date Deposited: 10 Jun 2020 00:28
Last Modified: 06 Jul 2020 00:05
URI: https://ueaeprints.uea.ac.uk/id/eprint/75502
DOI: 10.1029/2020GL087773

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