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dc.contributor.authorNicholson, David P.  Concept link
dc.contributor.authorStanley, Rachel H. R.  Concept link
dc.contributor.authorDoney, Scott C.  Concept link
dc.date.accessioned2014-07-29T15:25:47Z
dc.date.available2014-11-23T10:00:24Z
dc.date.issued2014-05-23
dc.identifier.citationGlobal Biogeochemical Cycle 28 (2014): 538–552en_US
dc.identifier.urihttps://hdl.handle.net/1912/6763
dc.descriptionAuthor Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycle 28 (2014): 538–552, doi:10.1002/2013GB004704.en_US
dc.description.abstractThe triple oxygen isotopic composition of dissolved oxygen (17Δdis) was added to the ocean ecosystem and biogeochemistry component of the Community Earth System Model, version 1.1.1. Model simulations were used to investigate the biological and physical dynamics of 17Δdis and assess its application as a tracer of gross photosynthetic production (gross oxygen production (GOP)) of O2 in the ocean mixed layer. The model reproduced large-scale patterns of 17Δdis found in observational data across diverse biogeographical provinces. Mixed layer model performance was best in the Pacific and had a negative bias in the North Atlantic and a positive bias in the Southern Ocean. Based on model results, the steady state equation commonly used to calculate GOP from tracer values overestimated the globally averaged model GOP by 29%. Vertical entrainment/mixing and the time rate of change of 17Δdis were the two largest sources of bias when applying the steady state method to calculate GOP. Entrainment/mixing resulted in the largest overestimation in midlatitudes and during summer and fall and almost never caused an underestimation of GOP. The tracer time rate of change bias resulted both in underestimation of GOP (e.g., during spring blooms at high latitudes) and overestimation (e.g., during the summer following a bloom). Seasonally, bias was highest in the fall (September-October-November in the Northern Hemisphere, March-April-May in the Southern), overestimating GOP by 62%, globally averaged. Overall, the steady state method was most accurate in equatorial and low-latitude regions where it estimated GOP to within ±10%. Field applicable correction terms are derived for entrainment and mixing that capture 86% of model vertical bias and require only mixed layer depth history and triple oxygen isotope measurements from two depths.en_US
dc.description.sponsorshipWe acknowledge support from Center for Microbial Oceanography Research and Education (CMORE) (NSF EF-0424599) and NOAA Climate Program Office (NA 100AR4310093).en_US
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.format.mimetypeapplication/postscript
dc.format.mimetypeapplication/msword
dc.language.isoen_USen_US
dc.publisherJohn Wiley & Sonsen_US
dc.relation.urihttps://doi.org/10.1002/2013GB004704
dc.subjectPrimary productionen_US
dc.subjectTriple oxygen isotopeen_US
dc.subjectPhotosynthesisen_US
dc.subjectGross primary productionen_US
dc.subjectCarbonen_US
dc.subjectOxygenen_US
dc.titleThe triple oxygen isotope tracer of primary productivity in a dynamic ocean modelen_US
dc.typeArticleen_US
dc.description.embargo2014-11-23en_US
dc.identifier.doi10.1002/2013GB004704


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