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 |
Published: |
HAL CCSD
2012
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-00987057 https://hal.archives-ouvertes.fr/hal-00987057/document https://hal.archives-ouvertes.fr/hal-00987057/file/rydberg_11513.pdf https://doi.org/10.1029/2012JG001992 |
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ftccsdartic:oai:HAL:hal-00987057v1 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
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 Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB) Université Toulouse III - Paul Sabatier (UT3) 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) |
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.archives-ouvertes.fr/hal-00987057 https://hal.archives-ouvertes.fr/hal-00987057/document https://hal.archives-ouvertes.fr/hal-00987057/file/rydberg_11513.pdf https://doi.org/10.1029/2012JG001992 |
long_lat |
ENVELOPE(-99.525,-99.525,58.442,58.442) |
geographic |
Single Lake |
geographic_facet |
Single Lake |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.archives-ouvertes.fr/hal-00987057 Journal of Geophysical Research, American Geophysical Union, 2012, vol. 117, ⟨10.1029/2012JG001992⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2012JG001992 hal-00987057 https://hal.archives-ouvertes.fr/hal-00987057 https://hal.archives-ouvertes.fr/hal-00987057/document https://hal.archives-ouvertes.fr/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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1766147718337527808 |
spelling |
ftccsdartic:oai:HAL:hal-00987057v1 2023-05-15T17:45:00+02:00 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 Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB) Université Toulouse III - Paul Sabatier (UT3) 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) 2012-12 https://hal.archives-ouvertes.fr/hal-00987057 https://hal.archives-ouvertes.fr/hal-00987057/document https://hal.archives-ouvertes.fr/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.archives-ouvertes.fr/hal-00987057 https://hal.archives-ouvertes.fr/hal-00987057/document https://hal.archives-ouvertes.fr/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.archives-ouvertes.fr/hal-00987057 Journal of Geophysical Research, American Geophysical Union, 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 ftccsdartic https://doi.org/10.1029/2012JG001992 2021-10-24T13:32:20Z 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Single Lake ENVELOPE(-99.525,-99.525,58.442,58.442) Journal of Geophysical Research: Biogeosciences 117 G4 n/a n/a |