Spatial extent and historical context of North Sea oxygen depletion in August 2010

Queste, Bastien Y., Fernand, Liam, Jickells, Timothy D. and Heywood, Karen J. (2013) Spatial extent and historical context of North Sea oxygen depletion in August 2010. Biogeochemistry, 113 (1-3). pp. 53-68. ISSN 0168-2563

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Abstract

Prompted by recent observations of seasonal low dissolved oxygen from two moorings in the North Sea, a hydrographic survey in August 2010 mapped the spatial extent of summer oxygen depletion. Typical near-bed dissolved oxygen saturations in the stratified regions of the North Sea were 75–80 % while the well-mixed regions of the southern North Sea reached 90 %. Two regions of strong thermal stratification, the area between the Dooley and Central North Sea Currents and the area known as the Oyster Grounds, had oxygen saturations as low as 65 and 70 % (200 and 180 µmol dm-3) respectively. Low dissolved oxygen was apparent in regions characterised by low advection, high stratification, elevated organic matter production from the spring bloom and a deep chlorophyll maximum. Historical data over the last century from the International Council for the Exploration of the Sea oceanographic database highlight an increase in seasonal oxygen depletion and a warming over the past 20 years. The 2010 survey is consistent with, and reinforces, the signal of recent depleted oxygen at key locations seen in the (albeit sparse) historical data.

Item Type: Article
Additional Information: The original article was incorrectly published without open access and with the copyright notice indicating ‘© UK Crown’. The article is now open access with the copyright residing with the authors.
Uncontrolled Keywords: hypoxia,north sea,oxygen,shelf,stratification
Faculty \ School: Faculty of Science > School of Environmental Sciences
Related URLs:
Depositing User: Pure Connector
Date Deposited: 04 Nov 2013 22:10
Last Modified: 21 Jul 2020 23:50
URI: https://ueaeprints.uea.ac.uk/id/eprint/44220
DOI: 10.1007/s10533-012-9729-9

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