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Stable isotope ratios in seawater nitrate reflect the influence of Pacific water along the northwest Atlantic margin
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 4637360
Author(s) Sherwood, Owen A.; Davin, Samuel H.; Lehmann, Nadine; Buchwald, Carolyn; Edinger, Evan N.; Lehmann, Moritz F.; Kienast, Markus
Author(s) at UniBasel Lehmann, Moritz
Year 2021
Title Stable isotope ratios in seawater nitrate reflect the influence of Pacific water along the northwest Atlantic margin
Journal Biogeosciences
Volume 18
Number 15
Pages / Article-Number 4491-4510
Abstract The flow of Pacific water to the North Atlantic exerts a globally significant control on nutrient balances between the two ocean basins and strongly influences biological productivity in the northwest Atlantic. Nutrient ratios of nitrate (NO3-) versus phosphate (PO34-) have previously been used to complement salinity characteristics in tracing the distribution of Pacific water in the North Atlantic. We expand on this premise and demonstrate that the fraction of Pacific water as determined by NO3-:PO34- ratios can be quantitatively predicted from the isotopic composition of subeuphotic nitrate in the northwest Atlantic. Our linear model thus provides a critically important framework for interpreting delta N-15 signatures incorporated into both modern marine biomass and organic material in historical and paleoceanographic archives along the northwest Atlantic margin.
ISSN/ISBN 1726-4170
edoc-URL https://edoc.unibas.ch/86536/
Full Text on edoc No
Digital Object Identifier DOI 10.5194/bg-18-4491-2021
ISI-Number 000680809700001
Document type (ISI) Article
 
   

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