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Metabolic balance in the mixed layer of the oligotrophic North Pacific Ocean from diel changes in O2/Ar saturation ratios
University of Hawai‘i at Mānoa, USA.
University of Hawai‘i at Mānoa, USA.
University of Hawai‘i at Mānoa, USA. (Centre for Ecology and Evolution in Microbial Model Systems)
University of Washington, USA.
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2015 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 42, no 9, 3421-3430 p.Article in journal (Refereed) Published
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Text
Abstract [en]

In situ measurements were made to determine oxygen (O<inf>2</inf>) metabolic balance in the upper oligotrophic ocean from diel changes in O<inf>2</inf> to argon (Ar) ratios. The study took place during 13-24 March 2014, at the Hawaii Ocean Time-series Station ALOHA (A Long-term Oligotrophic Habitat Assessment), in the North Pacific Subtropical Gyre. Microbial community respiration and gross O<inf>2</inf> production, estimated from in situ diel changes in O<inf>2</inf>/Ar saturation, agreed well with those calculated using other independent methods. Net oxygen production (NOP), estimated from in situ diel changes in O<inf>2</inf>/Ar saturation, showed large day-to-day variability. However, when averaged over the entire observational period, mean diel NOP was in relatively good agreement with the estimated mean steady state NOP (9.2±9.3mmolO<inf>2</inf>m-2d-1 compared to 11.7±1.1mmolO<inf>2</inf>m-2d-1, respectively). Key Points Diel changes in O<inf>2</inf>/Ar were used to determine mixed layer ecosystem metabolism Estimated metabolic rates agreed well with other independent methods There was a net production of O<inf>2</inf> in the mixed layer during the sampling period.

Place, publisher, year, edition, pages
2015. Vol. 42, no 9, 3421-3430 p.
Keyword [en]
net community production, North Pacific Subtropical Gyre, O2/Ar, oligotrophic ocean, respiration, Station ALOHA
National Category
Geophysics
Research subject
Natural Science
Identifiers
URN: urn:nbn:se:lnu:diva-55334DOI: 10.1002/2015GL063555ISI: 000355878300045Scopus ID: 2-s2.0-84930484087OAI: oai:DiVA.org:lnu-55334DiVA: diva2:951951
Available from: 2016-08-11 Created: 2016-08-10 Last updated: 2017-01-10Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
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More styles
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