FN Archimer Export Format PT J TI Physical Controls on Oxygen Distribution and Denitrification Potential in the North West Arabian Sea BT AF QUESTE, Bastien Y. VIC, Clement HEYWOOD, Karen J. PIONTKOVSKI, Sergey A. AS 1:1;2:2;3:1;4:3; FF 1:;2:;3:;4:; C1 Univ East Anglia, Sch Environm Sci, Ctr Ocean & Atmospher Sci, Norwich, Norfolk, England. Univ Southampton, Dept Ocean & Earth Sci, Southampton, Hants, England. Sultan Qaboos Univ, Coll Agr & Marine Sci, Muscat, Oman. C2 UNIV EAST ANGLIA, UK UNIV SOUTHAMPTON, UK UNIV SULTAN QABOOS, OMAN IF 4.578 TC 41 UR https://archimer.ifremer.fr/doc/00763/87477/92967.pdf https://archimer.ifremer.fr/doc/00763/87477/92968.docx https://archimer.ifremer.fr/doc/00763/87477/92969.png https://archimer.ifremer.fr/doc/00763/87477/92970.mp4 LA English DT Article DE ;deoxygenation;Oman;glider;Arabian sea;denitrifcation;eddies AB At suboxic oxygen concentrations, key biogeochemical cycles change and denitrification becomes the dominant remineralization pathway. Earth system models predict oxygen loss across most ocean basins in the next century; oxygen minimum zones near suboxia may become suboxic and therefore denitrifying. Using an ocean glider survey and historical data, we show oxygen loss in the Gulf of Oman (from 6-12 to <2 mu mol kg(-1)) not represented in climatologies. Because of the nonlinearity between denitrification and oxygen concentration, resolutions of current Earth system models are too coarse to accurately estimate denitrification. We develop a novel physical proxy for oxygen from the glider data and use a high-resolution physical model to show eddy stirring of oxygen across the Gulf of Oman. We use the model to investigate spatial and seasonal differences in the ratio of oxic and suboxic water across the Gulf of Oman and waters exported to the wider Arabian Sea. PY 2018 PD MAY SO Geophysical Research Letters SN 0094-8276 PU Amer Geophysical Union VL 45 IS 9 UT 000434111700044 BP 4143 EP 4152 DI 10.1029/2017GL076666 ID 87477 ER EF