Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: A case study in Buor-Khaya Gulf, Laptev Sea
It has been suggested that increasing freshwater discharge to the Arctic Ocean may also occur as submarine groundwater discharge (SGD), yet there are no direct observations of this phenomenon in the Arctic shelf seas. This study tests the hypothesis that SGD does exist in the Siberian-Arctic shelf s...
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ftawi:oai:epic.awi.de:44254 2024-09-15T17:51:34+00:00 Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: A case study in Buor-Khaya Gulf, Laptev Sea Charkin, Alexander N. Rutgers v. d. Loeff, Michiel Shakhova, Natalia E. Gustafsson, Örjan Dudarev, Oleg V. Cherepnev, Maxim S. Salyuk, Anatoly N. Koshurnikov, Andrey V. Spivak, Eduard A. Gunar, Alexey Y. Semiletov, Igor P. 2017-10-05 https://epic.awi.de/id/eprint/44254/ https://doi.org/10.5194/tc-11-2305-2017 https://hdl.handle.net/10013/epic.51769 unknown Copernicus Publications Charkin, A. N. , Rutgers v. d. Loeff, M. orcid:0000-0003-1393-3742 , Shakhova, N. E. , Gustafsson, Ö. , Dudarev, O. V. , Cherepnev, M. S. , Salyuk, A. N. , Koshurnikov, A. V. , Spivak, E. A. , Gunar, A. Y. and Semiletov, I. P. (2017) Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: A case study in Buor-Khaya Gulf, Laptev Sea , The Cryosphere, 11 , pp. 2305-2327 . doi:10.5194/tc-11-2305-2017 <https://doi.org/10.5194/tc-11-2305-2017> , hdl:10013/epic.51769 EPIC3The Cryosphere, Copernicus Publications, 11, pp. 2305-2327 Article isiRev 2017 ftawi https://doi.org/10.5194/tc-11-2305-2017 2024-06-24T04:17:43Z It has been suggested that increasing freshwater discharge to the Arctic Ocean may also occur as submarine groundwater discharge (SGD), yet there are no direct observations of this phenomenon in the Arctic shelf seas. This study tests the hypothesis that SGD does exist in the Siberian-Arctic shelf seas but its dynamics may be largely controlled by complicated geocryological conditions such as permafrost. The field-observational approach in the southeast Laptev Sea used a combination of hydrological (temperature, salinity), geological (bottom sediment drilling, geoelectric surveys) and geochemical (224Ra, 223Ra and 222Rn) techniques. Active SGD was documented in the vicinity of the Lena River delta with two different operational modes. In the first system, groundwater discharges through tectonogenic permafrost talik zones was registered in both wintertime and summertime seasons. The second SGD mechanism was cryogenic squeezing out of brine and water-soluble salts detected on the periphery of ice hummocks in the wintertime season. The proposed mechanisms of groundwater transport and discharge in the arctic land-shelf system is elaborated. Through salinity versus 224Ra and 224Ra/223Ra diagrams, the three main SGD-influenced water masses were identified and their end-member composition was constrained. Further studies should apply these techniques to a broader scale with the objective to reach an estimate of the relative importance of the SGD transport vector relative to surface freshwater discharge for both the water balance and aquatic components such as dissolved organic carbon, carbon dioxide, methane, and nutrients. Article in Journal/Newspaper Arctic Arctic Ocean Ice laptev Laptev Sea lena river permafrost The Cryosphere Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) The Cryosphere 11 5 2305 2327 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
It has been suggested that increasing freshwater discharge to the Arctic Ocean may also occur as submarine groundwater discharge (SGD), yet there are no direct observations of this phenomenon in the Arctic shelf seas. This study tests the hypothesis that SGD does exist in the Siberian-Arctic shelf seas but its dynamics may be largely controlled by complicated geocryological conditions such as permafrost. The field-observational approach in the southeast Laptev Sea used a combination of hydrological (temperature, salinity), geological (bottom sediment drilling, geoelectric surveys) and geochemical (224Ra, 223Ra and 222Rn) techniques. Active SGD was documented in the vicinity of the Lena River delta with two different operational modes. In the first system, groundwater discharges through tectonogenic permafrost talik zones was registered in both wintertime and summertime seasons. The second SGD mechanism was cryogenic squeezing out of brine and water-soluble salts detected on the periphery of ice hummocks in the wintertime season. The proposed mechanisms of groundwater transport and discharge in the arctic land-shelf system is elaborated. Through salinity versus 224Ra and 224Ra/223Ra diagrams, the three main SGD-influenced water masses were identified and their end-member composition was constrained. Further studies should apply these techniques to a broader scale with the objective to reach an estimate of the relative importance of the SGD transport vector relative to surface freshwater discharge for both the water balance and aquatic components such as dissolved organic carbon, carbon dioxide, methane, and nutrients. |
format |
Article in Journal/Newspaper |
author |
Charkin, Alexander N. Rutgers v. d. Loeff, Michiel Shakhova, Natalia E. Gustafsson, Örjan Dudarev, Oleg V. Cherepnev, Maxim S. Salyuk, Anatoly N. Koshurnikov, Andrey V. Spivak, Eduard A. Gunar, Alexey Y. Semiletov, Igor P. |
spellingShingle |
Charkin, Alexander N. Rutgers v. d. Loeff, Michiel Shakhova, Natalia E. Gustafsson, Örjan Dudarev, Oleg V. Cherepnev, Maxim S. Salyuk, Anatoly N. Koshurnikov, Andrey V. Spivak, Eduard A. Gunar, Alexey Y. Semiletov, Igor P. Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: A case study in Buor-Khaya Gulf, Laptev Sea |
author_facet |
Charkin, Alexander N. Rutgers v. d. Loeff, Michiel Shakhova, Natalia E. Gustafsson, Örjan Dudarev, Oleg V. Cherepnev, Maxim S. Salyuk, Anatoly N. Koshurnikov, Andrey V. Spivak, Eduard A. Gunar, Alexey Y. Semiletov, Igor P. |
author_sort |
Charkin, Alexander N. |
title |
Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: A case study in Buor-Khaya Gulf, Laptev Sea |
title_short |
Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: A case study in Buor-Khaya Gulf, Laptev Sea |
title_full |
Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: A case study in Buor-Khaya Gulf, Laptev Sea |
title_fullStr |
Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: A case study in Buor-Khaya Gulf, Laptev Sea |
title_full_unstemmed |
Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: A case study in Buor-Khaya Gulf, Laptev Sea |
title_sort |
discovery and characterization of submarine groundwater discharge in the siberian arctic seas: a case study in buor-khaya gulf, laptev sea |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/44254/ https://doi.org/10.5194/tc-11-2305-2017 https://hdl.handle.net/10013/epic.51769 |
genre |
Arctic Arctic Ocean Ice laptev Laptev Sea lena river permafrost The Cryosphere |
genre_facet |
Arctic Arctic Ocean Ice laptev Laptev Sea lena river permafrost The Cryosphere |
op_source |
EPIC3The Cryosphere, Copernicus Publications, 11, pp. 2305-2327 |
op_relation |
Charkin, A. N. , Rutgers v. d. Loeff, M. orcid:0000-0003-1393-3742 , Shakhova, N. E. , Gustafsson, Ö. , Dudarev, O. V. , Cherepnev, M. S. , Salyuk, A. N. , Koshurnikov, A. V. , Spivak, E. A. , Gunar, A. Y. and Semiletov, I. P. (2017) Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: A case study in Buor-Khaya Gulf, Laptev Sea , The Cryosphere, 11 , pp. 2305-2327 . doi:10.5194/tc-11-2305-2017 <https://doi.org/10.5194/tc-11-2305-2017> , hdl:10013/epic.51769 |
op_doi |
https://doi.org/10.5194/tc-11-2305-2017 |
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The Cryosphere |
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11 |
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5 |
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2305 |
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2327 |
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1810293508823580672 |