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dc.contributor.authorLuo, Ya-Wei
dc.contributor.authorDucklow, Hugh W.
dc.contributor.authorFriedrichs, Marjorie A. M.
dc.contributor.authorChurch, Matthew J.
dc.contributor.authorKarl, David M.
dc.contributor.authorDoney, Scott C.
dc.date.accessioned2012-09-21T14:28:35Z
dc.date.available2014-10-22T08:57:24Z
dc.date.issued2012-08-10
dc.identifier.citationJournal of Geophysical Research 117 (2012): G03019en_US
dc.identifier.urihttp://hdl.handle.net/1912/5377
dc.descriptionAuthor Posting. © American Geophysical Union, 2012. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 117 (2012): G03019, doi:10.1029/2011JG001830.en_US
dc.description.abstractThe upper ocean primary production measurements from the Hawaii Ocean Time series (HOT) at Station ALOHA in the North Pacific Subtropical Gyre showed substantial variability over the last two decades. The annual average primary production varied within a limited range over 1991–1998, significantly increased in 1999–2000 and then gradually decreased afterwards. This variability was investigated using a one-dimensional ecosystem model. The long-term HOT observations were used to constrain the model by prescribing physical forcings and lower boundary conditions and optimizing the model parameters against data using data assimilation. The model reproduced the general interannual pattern in the observed primary production, and mesoscale variability in vertical velocity was identified as a major contributing factor to the interannual variability in the simulation. Several strong upwelling events occurred in 1999, which brought up nitrate at rates several times higher than other years and elevated the model primary production. Our model results suggested a hypothesis for the observed interannual variability pattern of primary production at Station ALOHA: Part of the upwelled nitrate input in 1999 was converted to and accumulated as semilabile dissolved organic nitrogen (DON), and subsequent recycling of this semilabile DON supported enhanced primary productivity for the next several years as the semilabile DON perturbation was gradually removed via export.en_US
dc.description.sponsorshipThis work was supported in part by the Center for Microbial Oceanography, Research and Education (C-MORE) (NSF EF-0424599), Hawaii Ocean Time series program (NSF OCE09–26766), the Gordon and Betty Moore Foundation, and the Marine Biological Laboratory.en_US
dc.format.mimetypetext/plain
dc.format.mimetypeapplication/msword
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttp://dx.doi.org/10.1029/2011JG001830
dc.subjectMesoscale activityen_US
dc.subjectNorth Pacific Subtropical Gyreen_US
dc.subjectDissolved organic nitrogenen_US
dc.subjectInterannual variabilityen_US
dc.subjectPrimary productionen_US
dc.titleInterannual variability of primary production and dissolved organic nitrogen storage in the North Pacific Subtropical Gyreen_US
dc.typeArticleen_US
dc.description.embargo2013-03-10en_US
dc.identifier.doi10.1029/2011JG001830


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