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Seasonal and spatial variabilities in northern Gulf of Alaska surface water iron concentrations driven by shelf sediment resuspension, glacial meltwater, a Yakutat eddy, and dust
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2017
Source: Global Biogeochemical Cycles, 31(6), 942-960
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Journal Title:Global Biogeochemical Cycles
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Description:Phytoplankton growth in the Gulf of Alaska (GoA) is limited by iron (Fe), yet Fe sources are poorly constrained. We examine the temporal and spatial distributions of Fe, and its sources in the GoA, based ondata from three cruises carried out in 2010 from the Copper River (AK) mouth to beyond the shelf break. April data are the first to describe late winter Fe behavior before surface water nitrate depletion began. Sediment resuspension during winter and spring storms generated high “total dissolvable Fe ”(TDFe) concentrations of ~1000 nmol kg /C01along the entire continental shelf, which decreased beyond the shelf break. In July, high TDFe concentrations were similar on the shelf, but more spatially variable, and driven by
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Source:Global Biogeochemical Cycles, 31(6), 942-960
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ISSN:0886-6236;1944-9224;
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Rights Information:CC0 Public Domain
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Rights Statement:This article has been contributed to by US Government employees and their work is in the public domain in the USA.
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