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Studies of Nitrogen and Carbon Biogeochemistry during SOFex

Studies of Nitrogen and Carbon Biogeochemistry during SOFex
SOFex 期间氮和碳生物地球化学研究
批准号：
9986061
负责人：
Mark Altabet
金额：
$17.5万
依托单位：
University of Massachusetts, Dartmouth
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2001
资助国家：
美国
项目状态：
已结题
起止时间：
2001-06-01 至 2003-05-31
来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9986061&HistoricalAwards=false
关键词：
StudiesNitrogenCarbonBiogeochemistryduring

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英文摘要
ABSTRACTOCE-9986061Researchers at the University of Massachusetts at Dartmouth will participate in an larger expedition to the Southern Ocean (SOFeX) in austral summer of 2001-2002 to study the effects of mesoscale fertilization of the water column with iron. Specifically, these investigators will study the response of stable nitrogen and carbon isotope cycling to iron fertilization. Their goal is to use these isotopes as tracers to first determine the magnitude and mechanisms of nitrogen isotopic fractionation in response to an episodic iron input and thus to predict what kind of paleoceanographic signal would be generated (and preserved in the underlying sediments). Secondly, they will assess the feasibility of using stable isotopes of nitrogen and carbon as in situ transient tracers of nitrogen and carbon transfers in these open-water mesoscale perturbation experiments.
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Collaborative Research: Deciphering the mechanisms of marine nitrous oxide cycling using stable isotopes, molecular markers and in situ rates
Collaborative Research: Phylogenetic and Physiological Characterization of Amino Acid Nitrogen Isotopes in Phytoplankton
Collaborative Research: Multiyear autonomous measurement of N-loss in the ETNP ODZ
Collaborative research: Using individual amino acids N isotopes in sinking particles and surficial sediments to reconstruct euphotic zone N sources and trophic structure
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