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...

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Published in:The Cryosphere
Main Authors: 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
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2017
Subjects:
geo
Ice
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
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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
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