Assessment of the spatial distributions of total- and methyl-mercury and their relationship to sediment geochemistry from a whole-lake perspective
International audience The aim of this study was to determine the spatial variability for total- and methylmercury in surface sediments (0-2 cm) across a single whole-lake basin, and to relate this variability to the sediment's geochemical composition. 83 surface sediment samples from Stor-Strö...
Published in: | Journal of Geophysical Research: Biogeosciences |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2012
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Online Access: | https://hal.science/hal-00987057 https://hal.science/hal-00987057/document https://hal.science/hal-00987057/file/rydberg_11513.pdf https://doi.org/10.1029/2012JG001992 |
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Météo-France: HAL |
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English |
topic |
Mercury Methyl-mercury Lake Sweden Distribution Geochemistry [SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology |
spellingShingle |
Mercury Methyl-mercury Lake Sweden Distribution Geochemistry [SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology Rydberg, Johan Rosén, Peter Lambertsson, Lars de Vleeschouwer, François Tomasdotter, Sophia Bindler, Richard Assessment of the spatial distributions of total- and methyl-mercury and their relationship to sediment geochemistry from a whole-lake perspective |
topic_facet |
Mercury Methyl-mercury Lake Sweden Distribution Geochemistry [SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology |
description |
International audience The aim of this study was to determine the spatial variability for total- and methylmercury in surface sediments (0-2 cm) across a single whole-lake basin, and to relate this variability to the sediment's geochemical composition. 83 surface sediment samples from Stor-Strömsjön - a lake with multiple sub-basins located in northern Sweden - were analyzed for geochemical composition as well as total-mercury (total-Hg) and methylmercury (methyl-Hg; 35 samples) concentrations. Our results indicate that variations in fine-grained mineral matter (36%) and organic matter (34%) explain an equal amount of the total-Hg variation, but that their relative importance varies between different parts of the lake. Total-Hg concentrations were similar in locations controlled by organic matter or fine-grained mineral matter (average 109 ng g␣1); however, total-Hg inventories (mass per unit area) were significantly higher in the latter (35 and 53 mg m␣2, respectively). Methyl-Hg concentrations are largely (55% of variance) controlled by water depth and sulfur concentration, which supports the importance of within lake methylation reported from other studies. Both for concentrations and inventories the spatial distribution for methyl-Hg in surface sediments is patchy, and interestingly the highest methyl-Hg inventory (1.4 mg m␣2) was found in a shallow location with coarse-grained minerogenic sediment (very low organic matter). A large spatial variability, even within a single lake, is something that needs to be recognized, e.g., when studying processes affecting mercury cycling, mercury loadings and when using lake sediments to reconstruct historic mercury deposition. |
author2 |
Umeå University, Sweden Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) 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) Université de Toulouse (UT) |
format |
Article in Journal/Newspaper |
author |
Rydberg, Johan Rosén, Peter Lambertsson, Lars de Vleeschouwer, François Tomasdotter, Sophia Bindler, Richard |
author_facet |
Rydberg, Johan Rosén, Peter Lambertsson, Lars de Vleeschouwer, François Tomasdotter, Sophia Bindler, Richard |
author_sort |
Rydberg, Johan |
title |
Assessment of the spatial distributions of total- and methyl-mercury and their relationship to sediment geochemistry from a whole-lake perspective |
title_short |
Assessment of the spatial distributions of total- and methyl-mercury and their relationship to sediment geochemistry from a whole-lake perspective |
title_full |
Assessment of the spatial distributions of total- and methyl-mercury and their relationship to sediment geochemistry from a whole-lake perspective |
title_fullStr |
Assessment of the spatial distributions of total- and methyl-mercury and their relationship to sediment geochemistry from a whole-lake perspective |
title_full_unstemmed |
Assessment of the spatial distributions of total- and methyl-mercury and their relationship to sediment geochemistry from a whole-lake perspective |
title_sort |
assessment of the spatial distributions of total- and methyl-mercury and their relationship to sediment geochemistry from a whole-lake perspective |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-00987057 https://hal.science/hal-00987057/document https://hal.science/hal-00987057/file/rydberg_11513.pdf https://doi.org/10.1029/2012JG001992 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00987057 Journal of Geophysical Research, 2012, vol. 117, ⟨10.1029/2012JG001992⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1029/2012JG001992 hal-00987057 https://hal.science/hal-00987057 https://hal.science/hal-00987057/document https://hal.science/hal-00987057/file/rydberg_11513.pdf doi:10.1029/2012JG001992 OATAO: 11513 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2012JG001992 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
117 |
container_issue |
G4 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1799486293728559104 |
spelling |
ftmeteofrance:oai:HAL:hal-00987057v1 2024-05-19T07:46:09+00:00 Assessment of the spatial distributions of total- and methyl-mercury and their relationship to sediment geochemistry from a whole-lake perspective Rydberg, Johan Rosén, Peter Lambertsson, Lars de Vleeschouwer, François Tomasdotter, Sophia Bindler, Richard Umeå University, Sweden Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) 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) Université de Toulouse (UT) 2012-12 https://hal.science/hal-00987057 https://hal.science/hal-00987057/document https://hal.science/hal-00987057/file/rydberg_11513.pdf https://doi.org/10.1029/2012JG001992 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2012JG001992 hal-00987057 https://hal.science/hal-00987057 https://hal.science/hal-00987057/document https://hal.science/hal-00987057/file/rydberg_11513.pdf doi:10.1029/2012JG001992 OATAO: 11513 info:eu-repo/semantics/OpenAccess ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00987057 Journal of Geophysical Research, 2012, vol. 117, ⟨10.1029/2012JG001992⟩ Mercury Methyl-mercury Lake Sweden Distribution Geochemistry [SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology info:eu-repo/semantics/article Journal articles 2012 ftmeteofrance https://doi.org/10.1029/2012JG001992 2024-05-02T00:03:03Z International audience The aim of this study was to determine the spatial variability for total- and methylmercury in surface sediments (0-2 cm) across a single whole-lake basin, and to relate this variability to the sediment's geochemical composition. 83 surface sediment samples from Stor-Strömsjön - a lake with multiple sub-basins located in northern Sweden - were analyzed for geochemical composition as well as total-mercury (total-Hg) and methylmercury (methyl-Hg; 35 samples) concentrations. Our results indicate that variations in fine-grained mineral matter (36%) and organic matter (34%) explain an equal amount of the total-Hg variation, but that their relative importance varies between different parts of the lake. Total-Hg concentrations were similar in locations controlled by organic matter or fine-grained mineral matter (average 109 ng g␣1); however, total-Hg inventories (mass per unit area) were significantly higher in the latter (35 and 53 mg m␣2, respectively). Methyl-Hg concentrations are largely (55% of variance) controlled by water depth and sulfur concentration, which supports the importance of within lake methylation reported from other studies. Both for concentrations and inventories the spatial distribution for methyl-Hg in surface sediments is patchy, and interestingly the highest methyl-Hg inventory (1.4 mg m␣2) was found in a shallow location with coarse-grained minerogenic sediment (very low organic matter). A large spatial variability, even within a single lake, is something that needs to be recognized, e.g., when studying processes affecting mercury cycling, mercury loadings and when using lake sediments to reconstruct historic mercury deposition. Article in Journal/Newspaper Northern Sweden Météo-France: HAL Journal of Geophysical Research: Biogeosciences 117 G4 n/a n/a |