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Short-term variability in euphotic zone biogeochemistry and primary productivity at Station ALOHA: A case study of summer 2012
University of Hawai‘i at Manoa, USA.
University of Hawai‘i at Manoa, USA.
University of Hawai‘i at Manoa, USA ; University of Hawai‘i at Hilo, USA.
University of Hawai‘i at Manoa, USA ; University of Hawai‘i, USA.
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2015 (English)In: Global Biogeochemical Cycles, ISSN 0886-6236, E-ISSN 1944-9224, Vol. 29, no 8, 1145-1164 p.Article in journal (Refereed) Published
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Text
Abstract [en]

Time-series observations are critical to understand the structure, function, and dynamics of marine ecosystems. The Hawaii Ocean Time-series program has maintained near-monthly sampling at Station ALOHA (22°45′N, 158°00′W) in the oligotrophic North Pacific Subtropical Gyre (NPSG) since 1988 and has identified ecosystem variability over seasonal to interannual timescales. To further extend the temporal resolution of these near-monthly time-series observations, an extensive field campaign was conducted during July-September 2012 at Station ALOHA with near-daily sampling of upper water-column biogeochemistry, phytoplankton abundance, and activity. The resulting data set provided biogeochemical measurements at high temporal resolution and documents two important events at Station ALOHA: (1) a prolonged period of low productivity when net community production in the mixed layer shifted to a net heterotrophic state and (2) detection of a distinct sea-surface salinity minimum feature which was prominent in the upper water column (0-50 m) for a period of approximately 30 days. The shipboard observations during July-September 2012 were supplemented with in situ measurements provided by Seagliders, profiling floats, and remote satellite observations that together revealed the extent of the low productivity and the sea-surface salinity minimum feature in the NPSG.

Place, publisher, year, edition, pages
2015. Vol. 29, no 8, 1145-1164 p.
Keyword [en]
biogeochemistry, microbial ecology, primary productivity, Station ALOHA, temporal variability
National Category
Ecology
Research subject
Natural Science, Ecology
Identifiers
URN: urn:nbn:se:lnu:diva-54981DOI: 10.1002/2015GB005141Scopus ID: 2-s2.0-84941879841OAI: oai:DiVA.org:lnu-54981DiVA: diva2:951543
Available from: 2016-08-09 Created: 2016-07-22 Last updated: 2016-08-15Bibliographically approved

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