气候变化领域集成服务门户(CCPortal): Global variability in seawater Mg:Ca and Sr:Ca ratios in the modern ocean

CCPortal

DOI	10.1073/pnas.1918943117
	Global variability in seawater Mg:Ca and Sr:Ca ratios in the modern ocean
	Lebrato M.; Garbe-Schönberg D.; Müller M.N.; Blanco-Ameijeiras S.; Feely R.A.; Lorenzoni L.; Molinero J.-C.; Bremer K.; Jones D.O.B.; Iglesias-Rodriguez D.; Greeley D.; Lamare M.D.; Paulmier A.; Graco M.; Cartes J.; Barcelos e Ramos J.; de Lara A.; Sanchez-Leal R.; Jimenez P.; Paparazzo F.E.; Hartman S.E.; Westernströer U.; Küter M.; Benavides R.; da Silva A.F.; Bell S.; Payne C.; Olafsdottir S.; Robinson K.; Jantunen L.M.; Korablev A.; Webster R.J.; Jones E.M.; Gilg O.; du Bois P.B.; Beldowski J.; Ashjian C.; Yahia N.D.; Twining B.; Chen X.-G.; Tseng L.-C.; Hwang J.-S.; Dahms H.-U.; Oschlies A.
发表日期	2020
ISSN	0027-8424
起始页码	22281
结束页码	22292
卷号	117 期号:36
英文摘要	Seawater Mg:Ca and Sr:Ca ratios are biogeochemical parameters reflecting the Earth–ocean–atmosphere dynamic exchange of elements. The ratios’ dependence on the environment and organisms’ biology facilitates their application in marine sciences. Here, we present a measured single-laboratory dataset, combined with previous data, to test the assumption of limited seawater Mg:Ca and Sr:Ca variability across marine environments globally. High variability was found in open-ocean upwelling and polar regions, shelves/neritic and river-influenced areas, where seawater Mg:Ca and Sr:Ca ratios range from ∼4.40 to 6.40 mmol:mol and ∼6.95 to 9.80 mmol:mol, respectively. Open-ocean seawater Mg:Ca is semiconservative (∼4.90 to 5.30 mol:mol), while Sr:Ca is more variable and nonconservative (∼7.70 to 8.80 mmol:mol); both ratios are nonconservative in coastal seas. Further, the Ca, Mg, and Sr elemental fluxes are connected to large total alkalinity deviations from International Association for the Physical Sciences of the Oceans (IAPSO) standard values. Because there is significant modern seawater Mg:Ca and Sr:Ca ratios variability across marine environments we cannot absolutely assume that fossil archives using taxa-specific proxies reflect true global seawater chemistry but rather taxa- and process-specific ecosystem variations, reflecting regional conditions. This variability could reconcile secular seawater Mg:Ca and Sr:Ca ratio reconstructions using different taxa and techniques by assuming an error of 1 to 1.50 mol:mol, and 1 to 1.90 mmol:mol, respectively. The modern ratios’ variability is similar to the reconstructed rise over 20 Ma (Neogene Period), nurturing the question of semi-nonconservative behavior of Ca, Mg, and Sr over modern Earth geological history with an overlooked environmental effect. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Biogeochemistry; Global; Mg:Ca; Seawater; Sr:Ca
语种	英语
scopus关键词	calcium; magnesium; sea water; strontium; alkalinity; Article; biogeochemistry; ecosystem; elemental analysis; environmental monitoring; geography; marine environment; physical chemistry; physical parameters; priority journal; water analysis; water quality
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160229
作者单位	Lebrato, M., Geosciences Department, Kiel University, Kiel, 24118, Germany; Garbe-Schönberg, D., Geosciences Department, Kiel University, Kiel, 24118, Germany; Müller, M.N., Oceanography Department, Federal University of Pernambuco, Recife, 50670-901, Brazil; Blanco-Ameijeiras, S., Earth Sciences Department, ETH Zürich, Zürich, 8092, Switzerland; Feely, R.A., Ocean Climate Department, Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, WA 98115, United States; Lorenzoni, L., Remote Sensing Department, University of South Florida, Tampa, FL 33701, United States; Molinero, J.-C., Ecology Department, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, 24148, Germany; Bremer, K., Geosciences Department, Kiel University, Kiel, 24118, Germany; Jones, D.O.B., Ocean Biogeochemistry and Ecosystems Department, National Oceanography Center, Southampton, SO14 3ZH, United Kingdom; Iglesias-Rodriguez, D., Ecology, Evolution and Marine Biology Department, University of...
推荐引用方式 GB/T 7714	Lebrato M.,Garbe-Schönberg D.,Müller M.N.,et al. Global variability in seawater Mg:Ca and Sr:Ca ratios in the modern ocean[J],2020,117(36).
APA	Lebrato M..,Garbe-Schönberg D..,Müller M.N..,Blanco-Ameijeiras S..,Feely R.A..,...&Oschlies A..(2020).Global variability in seawater Mg:Ca and Sr:Ca ratios in the modern ocean.Proceedings of the National Academy of Sciences of the United States of America,117(36).
MLA	Lebrato M.,et al."Global variability in seawater Mg:Ca and Sr:Ca ratios in the modern ocean".Proceedings of the National Academy of Sciences of the United States of America 117.36(2020).