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German CR, Casciotti KA, Dutay JC, Heimbürger LE, Jenkins WJ, Measures CI, Mills RA, Obata H, Schlitzer R, Tagliabue A, Turner DR, Whitby H. Hydrothermal impacts on trace element and isotope ocean biogeochemistry. Philos Trans A Math Phys Eng Sci 2016; 374:rsta.2016.0035. [PMID: 29035265 PMCID: PMC5069535 DOI: 10.1098/rsta.2016.0035] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/15/2016] [Indexed: 05/10/2023]
Abstract
Hydrothermal activity occurs in all ocean basins, releasing high concentrations of key trace elements and isotopes (TEIs) into the oceans. Importantly, the calculated rate of entrainment of the entire ocean volume through turbulently mixing buoyant hydrothermal plumes is so vigorous as to be comparable to that of deep-ocean thermohaline circulation. Consequently, biogeochemical processes active within deep-ocean hydrothermal plumes have long been known to have the potential to impact global-scale biogeochemical cycles. More recently, new results from GEOTRACES have revealed that plumes rich in dissolved Fe, an important micronutrient that is limiting to productivity in some areas, are widespread above mid-ocean ridges and extend out into the deep-ocean interior. While Fe is only one element among the full suite of TEIs of interest to GEOTRACES, these preliminary results are important because they illustrate how inputs from seafloor venting might impact the global biogeochemical budgets of many other TEIs. To determine the global impact of seafloor venting, however, requires two key questions to be addressed: (i) What processes are active close to vent sites that regulate the initial high-temperature hydrothermal fluxes for the full suite of TEIs that are dispersed through non-buoyant hydrothermal plumes? (ii) How do those processes vary, globally, in response to changing geologic settings at the seafloor and/or the geochemistry of the overlying ocean water? In this paper, we review key findings from recent work in this realm, highlight a series of key hypotheses arising from that research and propose a series of new GEOTRACES modelling, section and process studies that could be implemented, nationally and internationally, to address these issues.This article is part of the themed issue 'Biological and climatic impacts of ocean trace element chemistry'.
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Affiliation(s)
- C R German
- Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
| | - K A Casciotti
- School of Earth, Energy and Environmental Sciences, Stanford University, Stanford, CA 94305, USA
| | - J-C Dutay
- SCE, IPSL/CEA, UVSQ, CNRS, Université Paris-Saclay, Gif sur Yvette, France
| | - L E Heimbürger
- Aix Marseille Université, CNRS/INSU, Université de Toulon, IRD, Mediterranean Institute of Oceanography (MIO) UM 110, 13288 Marseille, France
| | - W J Jenkins
- Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
| | - C I Measures
- Department of Oceanography, University of Hawaii, 1000 Pope Road, Honolulu, HI 96822, USA
| | - R A Mills
- Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Southampton SO14 3ZH, UK
| | - H Obata
- Atmosphere and Ocean Research Institute, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8564, Japan
| | - R Schlitzer
- Alfred Wegener Institute, Helmholtz-Center for Polar- and Marine Research, Am Alten Hafen 26, 27568 Bremerhaven, Germany
| | - A Tagliabue
- Department of Earth, Ocean and Ecological Sciences, School of Environmental Sciences, University of Liverpool, Liverpool L69 3GP, UK
| | - D R Turner
- Department of Marine Sciences, University of Gothenburg, 412 96 Gothenburg, Sweden
| | - H Whitby
- Department of Earth, Ocean and Ecological Sciences, School of Environmental Sciences, University of Liverpool, Liverpool L69 3GP, UK
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Anderson RF, Cheng H, Edwards RL, Fleisher MQ, Hayes CT, Huang KF, Kadko D, Lam PJ, Landing WM, Lao Y, Lu Y, Measures CI, Moran SB, Morton PL, Ohnemus DC, Robinson LF, Shelley RU. How well can we quantify dust deposition to the ocean? Philos Trans A Math Phys Eng Sci 2016; 374:rsta.2015.0285. [PMID: 29035251 DOI: 10.1098/rsta.2015.02852016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Accepted: 08/10/2016] [Indexed: 05/25/2023]
Abstract
Deposition of continental mineral aerosols (dust) in the Eastern Tropical North Atlantic Ocean, between the coast of Africa and the Mid-Atlantic Ridge, was estimated using several strategies based on the measurement of aerosols, trace metals dissolved in seawater, particulate material filtered from the water column, particles collected by sediment traps and sediments. Most of the data used in this synthesis involve samples collected during US GEOTRACES expeditions in 2010 and 2011, although some results from the literature are also used. Dust deposition generated by a global model serves as a reference against which the results from each observational strategy are compared. Observation-based dust fluxes disagree with one another by as much as two orders of magnitude, although most of the methods produce results that are consistent with the reference model to within a factor of 5. The large range of estimates indicates that further work is needed to reduce uncertainties associated with each method before it can be applied routinely to map dust deposition to the ocean. Calculated dust deposition using observational strategies thought to have the smallest uncertainties is lower than the reference model by a factor of 2-5, suggesting that the model may overestimate dust deposition in our study area.This article is part of the themed issue 'Biological and climatic impacts of ocean trace element chemistry'.
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Affiliation(s)
- R F Anderson
- Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA
- Department of Earth and Environmental Sciences, Columbia University, New York, NY 10027, USA
| | - H Cheng
- Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, USA
- Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - R L Edwards
- Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, USA
| | - M Q Fleisher
- Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA
| | - C T Hayes
- Department of Marine Science, University of Southern Mississippi, Stennis Space Center, MS 39529, USA
| | - K-F Huang
- Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan, Republic of China
| | - D Kadko
- Applied Research Center, Florida International University, Miami, FL 33174, USA
| | - P J Lam
- Department of Ocean Sciences, University of California Santa Cruz, Santa Cruz, CA 95064, USA
| | - W M Landing
- Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, FL 32306, USA
| | - Y Lao
- Department of Laboratory Services, Massachusetts Water Resources Authority, 190 Tafts Avenue, Winthrop, MA 02152, USA
| | - Y Lu
- Earth Observatory of Singapore, 50 Nanyang Avenue, Singapore 639798, Republic of Singapore
| | - C I Measures
- Department of Oceanography, University of Hawaii, Honolulu, HI 96822, USA
| | - S B Moran
- College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
| | - P L Morton
- Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, FL 32306, USA
| | - D C Ohnemus
- Bigelow Laboratory for Ocean Sciences, East Boothbay, ME 04544, USA
| | - L F Robinson
- School of Earth Sciences, University of Bristol, Queens Road, Bristol BS8 1RJ, UK
| | - R U Shelley
- LEMAR/UMR CNRS 6539/IUEM, Technopôle Brest-Iroise, Place Nicolas Copernic, Plouzané 29280, France
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Anderson RF, Cheng H, Edwards RL, Fleisher MQ, Hayes CT, Huang KF, Kadko D, Lam PJ, Landing WM, Lao Y, Lu Y, Measures CI, Moran SB, Morton PL, Ohnemus DC, Robinson LF, Shelley RU. How well can we quantify dust deposition to the ocean? Philos Trans A Math Phys Eng Sci 2016; 374:20150285. [PMID: 29035251 PMCID: PMC5069522 DOI: 10.1098/rsta.2015.0285] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/10/2016] [Indexed: 05/09/2023]
Abstract
Deposition of continental mineral aerosols (dust) in the Eastern Tropical North Atlantic Ocean, between the coast of Africa and the Mid-Atlantic Ridge, was estimated using several strategies based on the measurement of aerosols, trace metals dissolved in seawater, particulate material filtered from the water column, particles collected by sediment traps and sediments. Most of the data used in this synthesis involve samples collected during US GEOTRACES expeditions in 2010 and 2011, although some results from the literature are also used. Dust deposition generated by a global model serves as a reference against which the results from each observational strategy are compared. Observation-based dust fluxes disagree with one another by as much as two orders of magnitude, although most of the methods produce results that are consistent with the reference model to within a factor of 5. The large range of estimates indicates that further work is needed to reduce uncertainties associated with each method before it can be applied routinely to map dust deposition to the ocean. Calculated dust deposition using observational strategies thought to have the smallest uncertainties is lower than the reference model by a factor of 2-5, suggesting that the model may overestimate dust deposition in our study area.This article is part of the themed issue 'Biological and climatic impacts of ocean trace element chemistry'.
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Affiliation(s)
- R F Anderson
- Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA
- Department of Earth and Environmental Sciences, Columbia University, New York, NY 10027, USA
| | - H Cheng
- Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, USA
- Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - R L Edwards
- Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, USA
| | - M Q Fleisher
- Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA
| | - C T Hayes
- Department of Marine Science, University of Southern Mississippi, Stennis Space Center, MS 39529, USA
| | - K-F Huang
- Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan, Republic of China
| | - D Kadko
- Applied Research Center, Florida International University, Miami, FL 33174, USA
| | - P J Lam
- Department of Ocean Sciences, University of California Santa Cruz, Santa Cruz, CA 95064, USA
| | - W M Landing
- Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, FL 32306, USA
| | - Y Lao
- Department of Laboratory Services, Massachusetts Water Resources Authority, 190 Tafts Avenue, Winthrop, MA 02152, USA
| | - Y Lu
- Earth Observatory of Singapore, 50 Nanyang Avenue, Singapore 639798, Republic of Singapore
| | - C I Measures
- Department of Oceanography, University of Hawaii, Honolulu, HI 96822, USA
| | - S B Moran
- College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
| | - P L Morton
- Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, FL 32306, USA
| | - D C Ohnemus
- Bigelow Laboratory for Ocean Sciences, East Boothbay, ME 04544, USA
| | - L F Robinson
- School of Earth Sciences, University of Bristol, Queens Road, Bristol BS8 1RJ, UK
| | - R U Shelley
- LEMAR/UMR CNRS 6539/IUEM, Technopôle Brest-Iroise, Place Nicolas Copernic, Plouzané 29280, France
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Measures CI, Edmond JM. The distribution of aluminium in the Greenland Sea and its relationship to ventilation processes. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/92jc01798] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Measures CI, Edmond JM. Shipboard determination of aluminum in seawater at the nanomolar level by electron capture detection gas chromatography. Anal Chem 2002. [DOI: 10.1021/ac00181a009] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bourlès DL, Klinkhammer G, Campbell AC, Measures CI, Brown ET, Edmond JM. Beryllium in marine pore waters: geochemical and geochronological implications. Nature 1989. [DOI: 10.1038/341731a0] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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