气候变化领域集成服务门户(CCPortal): Lateral advection supports nitrogen export in the oligotrophic open-ocean Gulf of Mexico

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DOI	10.1038/s41467-021-23678-9
	Lateral advection supports nitrogen export in the oligotrophic open-ocean Gulf of Mexico
	Kelly T.B.; Knapp A.N.; Landry M.R.; Selph K.E.; Shropshire T.A.; Thomas R.K.; Stukel M.R.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	In contrast to its productive coastal margins, the open-ocean Gulf of Mexico (GoM) is notable for highly stratified surface waters with extremely low nutrient and chlorophyll concentrations. Field campaigns in 2017 and 2018 identified low rates of turbulent mixing, which combined with oligotrophic nutrient conditions, give very low estimates for diffusive flux of nitrate into the euphotic zone (< 1 µmol N m−2 d−1). Estimates of local N2-fixation are similarly low. In comparison, measured export rates of sinking particulate organic nitrogen (PON) from the euphotic zone are 2 – 3 orders of magnitude higher (i.e. 462 – 1144 µmol N m−2 d−1). We reconcile these disparate findings with regional scale dynamics inferred independently from remote-sensing products and a regional biogeochemical model and find that laterally-sourced organic matter is sufficient to support >90% of open-ocean nitrogen export in the GoM. Results show that lateral transport needs to be closely considered in studies of biogeochemical balances, particularly for basins enclosed by productive coasts. © 2021, The Author(s).
语种	英语
scopus关键词	nitrogen; particulate organic matter; carbon; nitric acid derivative; nitrogen; sea water; coastal zone; euphotic zone; nitrogen cycle; open ocean; organic matter; particulate organic nitrogen; turbulent mixing; advection; Article; chlorophyll content; coastal waters; Gulf of Mexico; nonhuman; remote sensing; chemistry; diffusion; Gulf of Mexico; nitrogen fixation; water flow; Atlantic Ocean; Gulf of Mexico; Carbon; Diffusion; Gulf of Mexico; Nitrates; Nitrogen; Nitrogen Fixation; Seawater; Water Movements
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251431
作者单位	Department of Earth, Ocean and Atmospheric Sciences, Florida State University, Tallahassee, FL, United States; Center for Ocean-Atmospheric Prediction Studies, Florida State University, Tallahassee, FL, United States; Integrative Oceanography Division, Scripps Institution of Oceanography, La Jolla, CA, United States; Department of Oceanography, University of Hawaii at Manoa, Honolulu, HI, United States; College of Fisheries and Ocean Science, University of Alaska Fairbanks, Fairbanks, AK, United States
推荐引用方式 GB/T 7714	Kelly T.B.,Knapp A.N.,Landry M.R.,et al. Lateral advection supports nitrogen export in the oligotrophic open-ocean Gulf of Mexico[J],2021,12(1).
APA	Kelly T.B..,Knapp A.N..,Landry M.R..,Selph K.E..,Shropshire T.A..,...&Stukel M.R..(2021).Lateral advection supports nitrogen export in the oligotrophic open-ocean Gulf of Mexico.Nature Communications,12(1).
MLA	Kelly T.B.,et al."Lateral advection supports nitrogen export in the oligotrophic open-ocean Gulf of Mexico".Nature Communications 12.1(2021).