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Kinetic bottlenecks to respiratory exchange rates in the deep-sea – Part 1: Oxygen

Hofmann, Andreas F. and Peltzer, Edward T. and Brewer, Peter G. (2013) Kinetic bottlenecks to respiratory exchange rates in the deep-sea – Part 1: Oxygen. Biogeosciences, 10, pp. 5049-5060. Copernicus Publications. DOI: [10.5194/bg-10-5049-2013] ISSN 1726-4170

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Official URL: http://www.biogeosciences.net/10/5049/2013/

Abstract

Ocean warming is now reducing dissolved oxygen concentrations, which can pose challenges to marine life. Oxygen limits are traditionally reported simply as a static concentration threshold with no temperature, pressure or flow rate dependency. Here we treat the oceanic oxygen supply potential for heterotrophic consumption as a dynamic molecular exchange problem analogous to familiar gas exchange processes at the sea surface. A combination of the purely physico-chemical oceanic properties temperature, hydrostatic pressure, and oxygen concentration defines the ability of the ocean to provide the oxygen supply to the external surface of a respiratory membrane. This general oceanic oxygen supply potential is modulated by further properties such as the diffusive boundary layer thickness to define an upper limit to oxygen supply rates. While the true maximal oxygen uptake rate of any organism is limited by gas transport either across the respiratory interface of the organism itself or across the diffusive boundary layer around an organism, controlled by physico-chemical oceanic properties, it can never be larger than the latter. Here, we define and calculate quantities that describe this upper limit to oxygen uptake posed by physico-chemical properties around an organism and show examples of their oceanic profiles.

Item URL in elib:https://elib.dlr.de/83578/
Document Type:Article
Title:Kinetic bottlenecks to respiratory exchange rates in the deep-sea – Part 1: Oxygen
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hofmann, Andreas F.DLR & MBARIUNSPECIFIED
Peltzer, Edward T.MBARI (Monterey Bay Aquarium Research Institute)UNSPECIFIED
Brewer, Peter G.MBARI (Monterey Bay Aquarium Research Institute)UNSPECIFIED
Date:25 July 2013
Journal or Publication Title:Biogeosciences
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:10
DOI :[10.5194/bg-10-5049-2013]
Page Range:pp. 5049-5060
Publisher:Copernicus Publications
ISSN:1726-4170
Status:Published
Keywords:ocean warming, deoxygenation, acidification; ecosystem management
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Fuel Cells (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Elektrochemische Prozesse (old)
Location: other
Institutes and Institutions:Institute of Engineering Thermodynamics > Computational Electrochemistry
Deposited By: Hofmann, Andreas Felix
Deposited On:06 Aug 2013 11:32
Last Modified:12 Dec 2013 22:09

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