Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: a case study in the Buor-Khaya Gulf, Laptev Sea
It has been suggested that increasing terrestrial water discharge to the Arctic Ocean may partly 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 Arcti...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2017
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-11-2305-2017 https://www.the-cryosphere.net/11/2305/2017/tc-11-2305-2017.pdf https://doaj.org/article/e4905923875c40c59388689fbfd39692 |
id |
fttriple:oai:gotriple.eu:oai:doaj.org/article:e4905923875c40c59388689fbfd39692 |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:oai:doaj.org/article:e4905923875c40c59388689fbfd39692 2023-05-15T14:48:19+02:00 Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: a case study in the Buor-Khaya Gulf, Laptev Sea A. N. Charkin M. Rutgers van der Loeff N. E. Shakhova Ö. Gustafsson O. V. Dudarev M. S. Cherepnev A. N. Salyuk A. V. Koshurnikov E. A. Spivak A. Y. Gunar A. S. Ruban I. P. Semiletov 2017-10-01 https://doi.org/10.5194/tc-11-2305-2017 https://www.the-cryosphere.net/11/2305/2017/tc-11-2305-2017.pdf https://doaj.org/article/e4905923875c40c59388689fbfd39692 en eng Copernicus Publications doi:10.5194/tc-11-2305-2017 1994-0416 1994-0424 https://www.the-cryosphere.net/11/2305/2017/tc-11-2305-2017.pdf https://doaj.org/article/e4905923875c40c59388689fbfd39692 undefined The Cryosphere, Vol 11, Pp 2305-2327 (2017) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2017 fttriple https://doi.org/10.5194/tc-11-2305-2017 2023-01-22T19:12:02Z It has been suggested that increasing terrestrial water discharge to the Arctic Ocean may partly 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 southeastern Laptev Sea used a combination of hydrological (temperature, salinity), geological (bottom sediment drilling, geoelectric surveys), and geochemical (224Ra, 223Ra, 228Ra, and 226Ra) 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 winter and summer. The second SGD mechanism was cryogenic squeezing out of brine and water-soluble salts detected on the periphery of ice hummocks in the winter. The proposed mechanisms of groundwater transport and discharge in the Arctic land-shelf system is elaborated. Through salinity vs. 224Ra and 224Ra / 223Ra diagrams, the three main SGD-influenced water masses were identified and their end-member composition was constrained. Based on simple mass-balance box models, discharge rates at sites in the submarine permafrost talik zone were 1. 7 × 106 m3 d−1 or 19.9 m3 s−1, which is much higher than the April discharge of the Yana River. Further studies should apply these techniques on a broader scale with the objective of elucidating the relative importance of the SGD transport vector relative to surface freshwater discharge for both 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 Unknown Arctic Arctic Ocean Buor-Khaya ENVELOPE(127.803,127.803,72.287,72.287) Khaya ENVELOPE(135.167,135.167,60.567,60.567) Laptev Sea Talik ENVELOPE(146.601,146.601,59.667,59.667) Yana River ENVELOPE(134.625,134.625,67.662,67.662) The Cryosphere 11 5 2305 2327 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir A. N. Charkin M. Rutgers van der Loeff N. E. Shakhova Ö. Gustafsson O. V. Dudarev M. S. Cherepnev A. N. Salyuk A. V. Koshurnikov E. A. Spivak A. Y. Gunar A. S. Ruban I. P. Semiletov Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: a case study in the Buor-Khaya Gulf, Laptev Sea |
topic_facet |
geo envir |
description |
It has been suggested that increasing terrestrial water discharge to the Arctic Ocean may partly 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 southeastern Laptev Sea used a combination of hydrological (temperature, salinity), geological (bottom sediment drilling, geoelectric surveys), and geochemical (224Ra, 223Ra, 228Ra, and 226Ra) 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 winter and summer. The second SGD mechanism was cryogenic squeezing out of brine and water-soluble salts detected on the periphery of ice hummocks in the winter. The proposed mechanisms of groundwater transport and discharge in the Arctic land-shelf system is elaborated. Through salinity vs. 224Ra and 224Ra / 223Ra diagrams, the three main SGD-influenced water masses were identified and their end-member composition was constrained. Based on simple mass-balance box models, discharge rates at sites in the submarine permafrost talik zone were 1. 7 × 106 m3 d−1 or 19.9 m3 s−1, which is much higher than the April discharge of the Yana River. Further studies should apply these techniques on a broader scale with the objective of elucidating the relative importance of the SGD transport vector relative to surface freshwater discharge for both water balance and aquatic components such as dissolved organic carbon, carbon dioxide, methane, and nutrients. |
format |
Article in Journal/Newspaper |
author |
A. N. Charkin M. Rutgers van der Loeff N. E. Shakhova Ö. Gustafsson O. V. Dudarev M. S. Cherepnev A. N. Salyuk A. V. Koshurnikov E. A. Spivak A. Y. Gunar A. S. Ruban I. P. Semiletov |
author_facet |
A. N. Charkin M. Rutgers van der Loeff N. E. Shakhova Ö. Gustafsson O. V. Dudarev M. S. Cherepnev A. N. Salyuk A. V. Koshurnikov E. A. Spivak A. Y. Gunar A. S. Ruban I. P. Semiletov |
author_sort |
A. N. Charkin |
title |
Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: a case study in the Buor-Khaya Gulf, Laptev Sea |
title_short |
Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: a case study in the Buor-Khaya Gulf, Laptev Sea |
title_full |
Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: a case study in the Buor-Khaya Gulf, Laptev Sea |
title_fullStr |
Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: a case study in the Buor-Khaya Gulf, Laptev Sea |
title_full_unstemmed |
Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: a case study in the Buor-Khaya Gulf, Laptev Sea |
title_sort |
discovery and characterization of submarine groundwater discharge in the siberian arctic seas: a case study in the buor-khaya gulf, laptev sea |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/tc-11-2305-2017 https://www.the-cryosphere.net/11/2305/2017/tc-11-2305-2017.pdf https://doaj.org/article/e4905923875c40c59388689fbfd39692 |
long_lat |
ENVELOPE(127.803,127.803,72.287,72.287) ENVELOPE(135.167,135.167,60.567,60.567) ENVELOPE(146.601,146.601,59.667,59.667) ENVELOPE(134.625,134.625,67.662,67.662) |
geographic |
Arctic Arctic Ocean Buor-Khaya Khaya Laptev Sea Talik Yana River |
geographic_facet |
Arctic Arctic Ocean Buor-Khaya Khaya Laptev Sea Talik Yana River |
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 |
The Cryosphere, Vol 11, Pp 2305-2327 (2017) |
op_relation |
doi:10.5194/tc-11-2305-2017 1994-0416 1994-0424 https://www.the-cryosphere.net/11/2305/2017/tc-11-2305-2017.pdf https://doaj.org/article/e4905923875c40c59388689fbfd39692 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-11-2305-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
5 |
container_start_page |
2305 |
op_container_end_page |
2327 |
_version_ |
1766319406096318464 |