Tracing of submarine groundwater discharge in the Siberian Arctic coastal zone: the case study in the Buor-Khaya Bay, Laptev Sea
That is suggested and widely accepted that a significant portion of the Great Siberian Rivers discharge comes to the Arctic ocean via submarine groundwater discharge (SGD). However, that statement was never proofed by observations. When groundwater discharges from the coastal aquifer to the ocean, t...
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ftawi:oai:epic.awi.de:39502 2024-09-15T17:51:22+00:00 Tracing of submarine groundwater discharge in the Siberian Arctic coastal zone: the case study in the Buor-Khaya Bay, Laptev Sea Charkin, A.N. Dudarev, O.V. Shakhova, N.E. Cherepnev, M.S. Semiletov, I. P. Rutgers v. d. Loeff, Michiel Gustafsson, Örjan 2015-12-17 https://epic.awi.de/id/eprint/39502/ https://hdl.handle.net/10013/epic.46722 unknown Charkin, A. , Dudarev, O. , Shakhova, N. , Cherepnev, M. , Semiletov, I. P. , Rutgers v. d. Loeff, M. orcid:0000-0003-1393-3742 and Gustafsson, Ö. (2015) Tracing of submarine groundwater discharge in the Siberian Arctic coastal zone: the case study in the Buor-Khaya Bay, Laptev Sea , AGU Fall Meeting, San Francisco, 14 December 2015 - 18 December 2015 . hdl:10013/epic.46722 EPIC3AGU Fall Meeting, San Francisco, 2015-12-14-2015-12-18 Conference notRev 2015 ftawi 2024-06-24T04:13:16Z That is suggested and widely accepted that a significant portion of the Great Siberian Rivers discharge comes to the Arctic ocean via submarine groundwater discharge (SGD). However, that statement was never proofed by observations. When groundwater discharges from the coastal aquifer to the ocean, the radium isotopes are transported with the groundwater, and they can be measured to trace and quantify SGD, and the flux of constituents associated with SGD. The primary goal of this study is to use radium isotopes to proof that SGD is existing in the Laptev Sea coastal zone close to the Lena River delta, which supposed to be characterized by continuous permafrost with thickness up to 600-800m. If so, we supposed to quantify methane fluxes to the coastal ocean through SGD. Discrete seawater, and Lena river water samples were collected from different horizons from the holes made in fast ice using submerged pump and Niskin bottle in the western part of Buor- Khaya Bay in March-April 2014 and 2015. We identified and traced SGD using short-lived radium (224Ra and 223Ra) and radon (222Rn) isotopes in complex with geophysical (electromagnetic technique), geological (sediment core results from 16 boreholes), hydrological (temperature, salinity), and hydrochemical (total alkalinity, dissolved methane and oxygen) data. It was found that the SGD is controlled by the processes associated with changing state of the subsea permafrost. Thus, this technique can give an unique information about the location of SGD “leakage” sites across the East Siberian Arctic Shelf, which represents > 80% of subsea permafrost existing in the entire Arctic ocean Conference Object Arctic Arctic Ocean Ice laptev Laptev Sea lena river permafrost Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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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 |
That is suggested and widely accepted that a significant portion of the Great Siberian Rivers discharge comes to the Arctic ocean via submarine groundwater discharge (SGD). However, that statement was never proofed by observations. When groundwater discharges from the coastal aquifer to the ocean, the radium isotopes are transported with the groundwater, and they can be measured to trace and quantify SGD, and the flux of constituents associated with SGD. The primary goal of this study is to use radium isotopes to proof that SGD is existing in the Laptev Sea coastal zone close to the Lena River delta, which supposed to be characterized by continuous permafrost with thickness up to 600-800m. If so, we supposed to quantify methane fluxes to the coastal ocean through SGD. Discrete seawater, and Lena river water samples were collected from different horizons from the holes made in fast ice using submerged pump and Niskin bottle in the western part of Buor- Khaya Bay in March-April 2014 and 2015. We identified and traced SGD using short-lived radium (224Ra and 223Ra) and radon (222Rn) isotopes in complex with geophysical (electromagnetic technique), geological (sediment core results from 16 boreholes), hydrological (temperature, salinity), and hydrochemical (total alkalinity, dissolved methane and oxygen) data. It was found that the SGD is controlled by the processes associated with changing state of the subsea permafrost. Thus, this technique can give an unique information about the location of SGD “leakage” sites across the East Siberian Arctic Shelf, which represents > 80% of subsea permafrost existing in the entire Arctic ocean |
format |
Conference Object |
author |
Charkin, A.N. Dudarev, O.V. Shakhova, N.E. Cherepnev, M.S. Semiletov, I. P. Rutgers v. d. Loeff, Michiel Gustafsson, Örjan |
spellingShingle |
Charkin, A.N. Dudarev, O.V. Shakhova, N.E. Cherepnev, M.S. Semiletov, I. P. Rutgers v. d. Loeff, Michiel Gustafsson, Örjan Tracing of submarine groundwater discharge in the Siberian Arctic coastal zone: the case study in the Buor-Khaya Bay, Laptev Sea |
author_facet |
Charkin, A.N. Dudarev, O.V. Shakhova, N.E. Cherepnev, M.S. Semiletov, I. P. Rutgers v. d. Loeff, Michiel Gustafsson, Örjan |
author_sort |
Charkin, A.N. |
title |
Tracing of submarine groundwater discharge in the Siberian Arctic coastal zone: the case study in the Buor-Khaya Bay, Laptev Sea |
title_short |
Tracing of submarine groundwater discharge in the Siberian Arctic coastal zone: the case study in the Buor-Khaya Bay, Laptev Sea |
title_full |
Tracing of submarine groundwater discharge in the Siberian Arctic coastal zone: the case study in the Buor-Khaya Bay, Laptev Sea |
title_fullStr |
Tracing of submarine groundwater discharge in the Siberian Arctic coastal zone: the case study in the Buor-Khaya Bay, Laptev Sea |
title_full_unstemmed |
Tracing of submarine groundwater discharge in the Siberian Arctic coastal zone: the case study in the Buor-Khaya Bay, Laptev Sea |
title_sort |
tracing of submarine groundwater discharge in the siberian arctic coastal zone: the case study in the buor-khaya bay, laptev sea |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/39502/ https://hdl.handle.net/10013/epic.46722 |
genre |
Arctic Arctic Ocean Ice laptev Laptev Sea lena river permafrost |
genre_facet |
Arctic Arctic Ocean Ice laptev Laptev Sea lena river permafrost |
op_source |
EPIC3AGU Fall Meeting, San Francisco, 2015-12-14-2015-12-18 |
op_relation |
Charkin, A. , Dudarev, O. , Shakhova, N. , Cherepnev, M. , Semiletov, I. P. , Rutgers v. d. Loeff, M. orcid:0000-0003-1393-3742 and Gustafsson, Ö. (2015) Tracing of submarine groundwater discharge in the Siberian Arctic coastal zone: the case study in the Buor-Khaya Bay, Laptev Sea , AGU Fall Meeting, San Francisco, 14 December 2015 - 18 December 2015 . hdl:10013/epic.46722 |
_version_ |
1810293253017174016 |