HE004
Mercury in Polar Waters: Sources, Transformations, and Bioaccumulation in Food Webs

Session ID#: 254233

Session Description:
High latitude environments are undergoing profound changes driven by climate warming. The impact of this change–sea ice loss, permafrost thaw, and shifting ocean circulation–is expected to alter the concentration and distribution of mercury (Hg) in polar marine waters. While models indicate that Hg concentrations will rise in the Arctic under current emission climate scenarios, the processes influencing Hg mobility and speciation remain poorly understood, especially in the Antarctic, where data is even more limited. To accurately model the fate of Hg in a warming climate and risk for human exposure, it is imperative that we understand the mechanisms governing Hg cycling, particularly methylation and demethylation pathways, which still remain elusive. This session invites contributions that explore the biogeochemical cycling of Hg in both the Arctic and Antarctic, with a focus on the release and delivery of Hg species to coastal zones, processes that influence Hg transformations, and bioaccumulation in marine food webs. Interdisciplinary perspectives that incorporate Indigenous knowledge and community-based monitoring are also encouraged, as are studies addressing the vulnerability of subsistence-dependent communities to changing Hg exposure.
Co-Sponsor(s):
  • Coastal and Estuarine Biology and Biogeochemistry -
  • Contaminants in the Marine Environment -
  • Ocean Biology and Biogeochemistry -
Index Terms:

4207 Arctic and Antarctic oceanography [OCEANOGRAPHY: GENERAL]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: CHEMICAL]
4807 Chemical speciation and complexation [OCEANOGRAPHY: CHEMICAL]
4875 Trace elements [OCEANOGRAPHY: CHEMICAL]
Student/Early Career Chair:  Marissa Despins, University of California Santa Cruz, Ocean Sciences, Santa Cruz, United States
Primary Chair:  Emily Seelen, University of Alaska Fairbanks, Fairbanks, United States
Co-chairs:  Marissa Despins, University of California Santa Cruz, Ocean Sciences, Santa Cruz, United States and Stephen Kohler, Norwegian University of Science and Technology, Trondheim, Norway
 
Assessing the importance of the Greenland Ice Sheet in mercury mobilization and export using an ice-to-ocean approach (2014006)
Amina N. Youssef1, Sarah E Janssen2, Carl H Lamborg3, Michael Tate2, David McCabe1, Marissa Despins4, Eva Lisa Doting1, Leah Hopf1, Abe Doroshow1, Emma M Kocik1, Guillaume Lamarche-gagnon5, Jeannette Calvin6, Ian Arburua Delaney7, Marjolein Gevers7, Jade E Hatton8, Petra Klímová9, Iris Kübler-Dudgeon10, Jack Murphy1, Loic Piret1,11, Brett A Poulin12, Amina Traore Schartup13, Marek Stibal9, Johannes West13, Jakub D Žarský9 and Jon Hawkings1,5, (1)University of Pennsylvania, Department of Earth and Environmental Science, Philadelphia, United States, (2)USGS Upper Midwest Water Science Center, Madison, United States, (3)University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States, (4)University of California Santa Cruz, Ocean Sciences, Santa Cruz, United States, (5)Centre for ice, Cryosphere, Carbon and Climate (iC3) - UiT The Arctic University of Norway, Geosciences, Tromsø, Norway, (6)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, United States, (7)University of Lausanne, Institute of Earth Surface Dynamics, Lausanne, Switzerland, (8)UK Centre for Ecology & Hydrology, Wallingford, United Kingdom, (9)Charles University, Department of Ecology, Prague, Czech Republic, (10)Scripps Institution of Oceanography, La Jolla, United States, (11)Ghent University, Renard Center of Marine Geology, Ghent, Belgium, (12)University of California Davis, Davis, United States, (13)Scripps Institution of Oceanography, Marine Chemistry and Geochemistry, Geosciences Research Division, La Jolla, United States
 
Emerging Mercury Exposure Risks from Changing Diets and Permafrost Thaw in a Warming Arctic (2014558)
Isabel Smith, University of Southern California, Los Angeles, United States, Emily Seelen, University of Alaska Fairbanks, Fairbanks, United States, Edda Andrea Mutter, Yukon River Inter-Tribal Watershed Council, Anchorage, AK, United States, Anna Godduhn, Yukon River Inter-Tribal Watershed Council, Anchorage, United States, Yutian Ke, California Institute of Technolgy, Los Angeles, United States, Marie Lowe, University of Alaska Anchorage, Department of Anthropology, Anchorage, United States, John S Magyar, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, United States and A. Joshua West, University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States
 
The role of sea-ice in influencing the air-sea exchange of inorganic and methylated mercury in the Arctic Ocean (2015982)
Robert P Mason, University of Connecticut, Marine Sciences, Groton, United States, Yipeng He, Woods Hole Oceanographic Institute, Marine Chemistry & Geochemistry, Woods Hole, United States, Hannah Inman, University of Connecticut, Marine Science, Groton, United States, Douglas E Hammond, University of Southern California, Department of Earth Science, Los Angeles, United States and Mark P Stephens, PhD, Florida International University, Applied Research Center, Miami, FL, United States
 
Dynamics of Methylated Mercury in a Redox-Stratified Arctic Fjord (2018005)
Erik Bjorn1, Thibaut Cossart1, Isabel Sanz-Sáez1, Júlia Dordal-Soriano2, Meifang Zhong3, Tove Bratthäll1, Johannes West4, Amina Traore Schartup4, Sofi Jonsson5, Andrea Garcia Bravo6 and Eric Capo3, (1)Umeå University, Department of Chemistry, Umeå, Sweden, (2)Institute of Marine Sciences, CSIC, Department of Marine Biology and Oceanography, Barcelona, Spain, (3)Umeå universitet, Ecology, Environment and Geoscience, Umeå, Sweden, (4)Scripps Institution of Oceanography, Marine Chemistry and Geochemistry, Geosciences Research Division, La Jolla, United States, (5)Stockholm University, Stockholm, Sweden, (6)ICM-CSIC, Department of Marine Biology and Oceanography, Barcelona, Spain
 
Early diagenetic cycling of monomethylmercury in deep marine Arctic sediments: Microbial production and Fe–Mn oxy(hydr)oxides –mediated sequestration (2018127)
Marta Pérez Rodríguez1, Lisbeth Fürst Sørensen2, Frank Wenzhofer3, Daniel Schupp1, Ronnie N Glud4, Blandine Trouche2 and Harald Biester1, (1)Technical University of Braunschweig, Institute for Geoecology, Environmental Geochemistry Group, Braunschweig, Germany, (2)HADAL & Nordcee, University of Southern Denmark, Department of Biology, Odense, Denmark, (3)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, HGF-MPG Joint Research Group for Deep-Sea Ecology and Technology, Bremerhaven, Germany, (4)University of Southern Denmark, Department of Biology, Odense M, Denmark
 
Mercury cycling in sediments across the Amundsen Sea shelf (2021843)
Marissa Despins, University of California Santa Cruz, Ocean Sciences, Santa Cruz, United States, Robert P Mason, University of Connecticut, Marine Sciences, Groton, United States, Yipeng He, Woods Hole Oceanographic Institute, Marine Chemistry & Geochemistry, Woods Hole, United States, Silvia E Newell, University of Michigan Ann Arbor, Ann Arbor, United States and Carl H Lamborg, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States
 
Prokaryotic Contribution To Mercury Transformations In Arctic Thermokarst Lakes Sediments: A Metagenomic Study. (2024709)
Nicola Gambardella1, Eric Capo2, João Canário3 and Catarina Magalhães1, (1)Universidade do Porto, Biology, Porto, Portugal, (2)Umeå universitet, Ecology, Environment and Geoscience, Umeå, Sweden, (3)Instituto Superior Técnico, Centro de Química Estrutural, Departamento de Engenharia Química, Lisboa, Portugal
 
Determining the Source and Distribution of Atmospheric Mercury over the Southern Ocean (2025760)
Victor Mugabe, Stellenbosch University, Earth Science, Matieland, South Africa, Susanne Fietz, Stellenbosch University, Department of Earth Sciences, Faculty of Science, Stellenbosch, South Africa, Lynwill G. Martin, South African Weather Service, c/o CSIR Environmentek, Stellenbosch, South Africa and Helene Angot, University Grenoble Alpes, Grenoble, France
 
Source and fate of mercury in the Siberian shelf seas: isotopic evidence and sea-specific distribution patterns (2037019)
Stephen Kohler1, Alyssa Azaroff2, Helena Anzjøn1, Murat V Ardelan3, Alicia Garcia-Garcia4, Orjan Gustafsson2, Lars-Eric Heimbürger5, Alina Kleindienst2, Nicolas Sanchez3, Cristina M Segovia6, Jeroen Sonke7, Evgeniy Yakushev8 and Sofi Jonsson2, (1)Norwegian University of Science and Technology, Trondheim, Norway, (2)Stockholm University, Stockholm, Sweden, (3)Norwegian University of Science and Technology, Department of Chemistry, Trondheim, Norway, (4)University of Zaragoza, Zaragoza, Spain, (5)Aix Marseille Université, CNRS/INSU, Université de Toulon, IRD, Mediterranean Institute of Oceanography (MIO), Marseille, France, (6)University of Valladolid, Valladolid, Spain, (7)CNRS/OMP/Université de Toulouse, Géosciences Environnement Toulouse, Toulouse, France, (8)Norwegian Institute for Water Research, Oslo, Norway
 
Properties of Inflowing Pacific and Atlantic Water Govern Total and Methylated Mercury Profiles in the Arctic Ocean (2037375)
Sangwoo Eom and Seunghee Han, Gwangju Institute of Science and Technology, Gwangju, South Korea
 
Mercury dynamics in the Northern Gulf of Alaska (2047806)
Emily Seelen, University of Alaska Fairbanks, Fairbanks, United States
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