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Global variability in seawater Mg:Ca and Sr:Ca ratios in the modern ocean.
Lebrato, Mario; Garbe-Schönberg, Dieter; Müller, Marius N; Blanco-Ameijeiras, Sonia; Feely, Richard A; Lorenzoni, Laura; Molinero, Juan-Carlos; Bremer, Karen; Jones, Daniel O B; Iglesias-Rodriguez, Debora; Greeley, Dana; Lamare, Miles D; Paulmier, Aurelien; Graco, Michelle; Cartes, Joan; Barcelos E Ramos, Joana; de Lara, Ana; Sanchez-Leal, Ricardo; Jimenez, Paz; Paparazzo, Flavio E; Hartman, Susan E; Westernströer, Ulrike; Küter, Marie; Benavides, Roberto; da Silva, Armindo F; Bell, Steven; Payne, Chris; Olafsdottir, Solveig; Robinson, Kelly; Jantunen, Liisa M; Korablev, Alexander; Webster, Richard J; Jones, Elizabeth M; Gilg, Olivier; Bailly du Bois, Pascal; Beldowski, Jacek; Ashjian, Carin; Yahia, Nejib D; Twining, Benjamin; Chen, Xue-Gang; Tseng, Li-Chun; Hwang, Jiang-Shiou; Dahms, Hans-Uwe; Oschlies, Andreas.
Afiliação
  • Lebrato M; Geosciences Department, Kiel University, 24118 Kiel, Germany; mlebrato13@gmail.com.
  • Garbe-Schönberg D; Geosciences Department, Kiel University, 24118 Kiel, Germany.
  • Müller MN; Oceanography Department, Federal University of Pernambuco, 50670-901 Recife, Brazil.
  • Blanco-Ameijeiras S; Earth Sciences Department, ETH Zürich, 8092 Zürich, Switzerland.
  • Feely RA; Ocean Climate Department, Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, WA 98115.
  • Lorenzoni L; Remote Sensing Department, University of South Florida, Tampa, FL 33701.
  • Molinero JC; Ecology Department, GEOMAR Helmholtz Centre for Ocean Research Kiel, 24148 Kiel, Germany.
  • Bremer K; Geosciences Department, Kiel University, 24118 Kiel, Germany.
  • Jones DOB; Ocean Biogeochemistry and Ecosystems Department, National Oceanography Center, Southampton SO14 3ZH, United Kingdom.
  • Iglesias-Rodriguez D; Ecology, Evolution and Marine Biology Department, University of California, Santa Barbara, CA 93106.
  • Greeley D; Ocean Climate Department, Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, WA 98115.
  • Lamare MD; Department of Marine Science, University of Otago, 9016 Dunedin, New Zealand.
  • Paulmier A; Biogeosciences Department, Laboratoire d´Etudes en Geophysique et Oceanographie Spatiales, Institut de Recherche pour le Développement, CNRS, Centre National d'Etudes Spatiales, Université Paul Sabatier, University of Toulouse, 31000 Toulouse, France.
  • Graco M; Biogeosciences Department, Laboratoire d´Etudes en Geophysique et Oceanographie Spatiales, Institut de Recherche pour le Développement, CNRS, Centre National d'Etudes Spatiales, Université Paul Sabatier, University of Toulouse, 31000 Toulouse, France.
  • Cartes J; Renewable Marine Resources Department, Institute of Marine Sciences at Spanish National Research Council, 08003 Barcelona, Spain.
  • Barcelos E Ramos J; Climate, Meteorology and Global Changes Department, University of the Azores, 9501-855 Ponta Delgada, Portugal.
  • de Lara A; Organisms & Systems Biology Department, University of Oviedo, 33003 Oviedo, Spain.
  • Sanchez-Leal R; Physical Oceanography Department, Spanish Institute of Oceanography, 11006 Cadiz, Spain.
  • Jimenez P; Physical Oceanography Department, Spanish Institute of Oceanography, 11006 Cadiz, Spain.
  • Paparazzo FE; Biological Oceanography, Centro para el Estudio de Sistemas Marinas, Consejo Nacional de Investigaciones Científicas y Técnicas, 2915 Chubut, Argentina.
  • Hartman SE; Ocean Biogeochemistry and Ecosystems Department, National Oceanography Center, Southampton SO14 3ZH, United Kingdom.
  • Westernströer U; Geosciences Department, Kiel University, 24118 Kiel, Germany.
  • Küter M; Geosciences Department, Kiel University, 24118 Kiel, Germany.
  • Benavides R; Ecology Department, GEOMAR Helmholtz Centre for Ocean Research Kiel, 24148 Kiel, Germany.
  • da Silva AF; Marine Biogeochemistry Department, Bazaruto Center for Scientific Studies, Benguerra Island, 1304 Vilankulos, Mozambique.
  • Bell S; Marine Chemistry Department, Bermuda Institute of Ocean Sciences, GE 01 St. George, Bermuda.
  • Payne C; Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.
  • Olafsdottir S; Marine Environment Department, Marine and Freshwater Research Institute, 101 Reykjavic, Iceland.
  • Robinson K; Department of Biology, University of Louisiana at Lafayette, Lafayette, LA 70503.
  • Jantunen LM; Air Quality Processes Research Department, Environment and Climate Change Canada, ON L0L 1N0, Canada.
  • Korablev A; Geophysics Department, University of Bergen, 5007 Bergen, Norway.
  • Webster RJ; Clinical Research Unit, CHEO Research Institute, Ottawa, ON K1H 8L1, Canada.
  • Jones EM; Oceanography and Climate Department, Institute of Marine Research, 9007 Tromsø, Norway.
  • Gilg O; Chrono-Environnement Department, Université de Bourgogne Franche-Comté, 21078 Dijon, France.
  • Bailly du Bois P; Radioecology Department, Cherbourg Radioecology Laboratory, Institut de Radioprotection et de Sȗreté Nucléaire, 50130 Octeville, France.
  • Beldowski J; Marine Chemistry and Biochemistry Department, Polish Academy of Sciences, 81-712 Sopot, Poland.
  • Ashjian C; Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543.
  • Yahia ND; Biological and Environmental Sciences Department, Qatar University, 2713 Doha, Qatar.
  • Twining B; Center for Ocean Biogeochemistry and Climate Change, Bigelow Laboratory for Ocean Sciences, East Boothbay, ME 04544.
  • Chen XG; Department of Ocean Science and Engineering, Zhejiang University, 316021 Zhoushan, China.
  • Tseng LC; Marine Biology Institute, National Taiwan Ocean University, 20224 Keelung City, Taiwan.
  • Hwang JS; Marine Biology Institute, National Taiwan Ocean University, 20224 Keelung City, Taiwan.
  • Dahms HU; Center for Excellence for the Oceans, National Taiwan Ocean University, 20224 Keelung City, Taiwan.
  • Oschlies A; Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, 807, Kaohsiung, Taiwan.
Proc Natl Acad Sci U S A ; 117(36): 22281-22292, 2020 09 08.
Article em En | MEDLINE | ID: mdl-32843340
ABSTRACT
Seawater MgCa and SrCa 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 MgCa and SrCa variability across marine environments globally. High variability was found in open-ocean upwelling and polar regions, shelves/neritic and river-influenced areas, where seawater MgCa and SrCa ratios range from ∼4.40 to 6.40 mmolmol and ∼6.95 to 9.80 mmolmol, respectively. Open-ocean seawater MgCa is semiconservative (∼4.90 to 5.30 molmol), while SrCa is more variable and nonconservative (∼7.70 to 8.80 mmolmol); 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 MgCa and SrCa 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 MgCa and SrCa ratio reconstructions using different taxa and techniques by assuming an error of 1 to 1.50 molmol, and 1 to 1.90 mmolmol, respectively. The modern ratios' variability is similar to the reconstructed rise over 20 Ma (Neogene Period), nurturing the question of seminonconservative behavior of Ca, Mg, and Sr over modern Earth geological history with an overlooked environmental effect.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Proc Natl Acad Sci U S A Ano de publicação: 2020 Tipo de documento: Article
Texto completo
Adicionar na Minha BVS
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XML
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Proc Natl Acad Sci U S A Ano de publicação: 2020 Tipo de documento: Article