Eurasian river spring flood observations support net Arctic Ocean mercury export to the atmosphere and Atlantic Ocean
| Autor: | Nicolas Marusczak, Mariia V. Petrova, Roman Teisserenc, Jeroen E. Sonke, Elsie M. Sunderland, Lars-Eric Heimbürger-Boavida, Nikita Tananaev, Oleg S. Pokrovsky, Artem V. Chupakov, Chuxian Li, Colin P. Thackray, Théo Le Dantec |
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| Přispěvatelé: | Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT), Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Université de Toulon (UTLN), N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch (FECIAR UrB RAS ), Russian Academy of Sciences - Chernogolovka, Harvard University, Université Fédérale Toulouse Midi-Pyrénées, Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), N. Laverov Federal Center for Integrated Arctic Research, Harvard University [Cambridge] |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Asia
010504 meteorology & atmospheric sciences [SDE.MCG]Environmental Sciences/Global Changes chemistry.chemical_element 010501 environmental sciences 01 natural sciences Rivers Dissolved organic carbon Humans 14. Life underwater Atlantic Ocean ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences Air Pollutants весенний паводок Multidisciplinary Arctic Regions Атлантический океан Mercury Models Theoretical Particulates реки Floods Северный Ледовитый океан Tundra Mercury (element) Europe ртуть Oceanography PNAS Plus Arctic chemistry 13. Climate action Middle latitudes Environmental science Seasons Surface runoff Bay Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Proceedings of the National Academy of Sciences of the United States of America Proceedings of the National Academy of Sciences of the United States of America, 2018, 115 (50), pp.E11586-E11594. ⟨10.1073/pnas.1811957115⟩ Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2018, 115 (50), pp.E11586-E11594. ⟨10.1073/pnas.1811957115⟩ Proceedings of the National Academy of Sciences of the United States of America. 2018. Vol. 115, № 50. P. E11586-E11594 Proc. Nat. Acad. Sciences (PNAS) |
| ISSN: | 0027-8424 1091-6490 |
| DOI: | 10.1073/pnas.1811957115⟩ |
| Popis: | Midlatitude anthropogenic mercury (Hg) emissions and discharge reach the Arctic Ocean (AO) by atmospheric and oceanic transport. Recent studies suggest that Arctic river Hg inputs have been a potentially overlooked source of Hg to the AO. Observations on Hg in Eurasian rivers, which represent 80% of freshwater inputs to the AO, are quasi-inexistent, however, putting firm understanding of the Arctic Hg cycle on hold. Here, we present comprehensive seasonal observations on dissolved Hg (DHg) and particulate Hg (PHg) concentrations and fluxes for two large Eurasian rivers, the Yenisei and the Severnaya Dvina. We find large DHg and PHg fluxes during the spring flood, followed by a second pulse during the fall flood. We observe well-defined water vs. Hg runoff relationships for Eurasian and North American Hg fluxes to the AO and for Canadian Hg fluxes into the larger Hudson Bay area. Extrapolation to pan-Arctic rivers and watersheds gives a total Hg river flux to the AO of 44 ± 4 Mg per year (1σ), in agreement with the recent model-based estimates of 16 to 46 Mg per year and Hg/dissolved organic carbon (DOC) observation-based estimate of 50 Mg per year. The river Hg budget, together with recent observations on tundra Hg uptake and AO Hg dynamics, provide a consistent view of the Arctic Hg cycle in which continental ecosystems traffic anthropogenic Hg emissions to the AO via rivers, and the AO exports Hg to the atmosphere, to the Atlantic Ocean, and to AO marine sediments. |
| Databáze: | OpenAIRE |
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