Isotopic composition of modern ice wedges and winter precipitation in the Laptev Sea region (Table 2)
The first step for the application of stable isotope analyses of ice wedges for the correct paleoclimatic reconstruction supposes the study of the isotopic composition of modern ice wedges and their relationship with the isotopic composition of modern precipitation. The purpose of this research is t...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.418311 2023-05-15T16:37:18+02:00 Isotopic composition of modern ice wedges and winter precipitation in the Laptev Sea region (Table 2) Dereviagin, Alexander Yu Meyer, Hanno Chizhov, Alexander B Hubberten, Hans-Wolfgang Simonov, Eugeniy F MEDIAN LATITUDE: 72.787614 * MEDIAN LONGITUDE: 124.748086 * SOUTH-BOUND LATITUDE: 71.000000 * WEST-BOUND LONGITUDE: 100.000000 * NORTH-BOUND LATITUDE: 75.000000 * EAST-BOUND LONGITUDE: 141.500000 2002-10-13 text/tab-separated-values, 54 data points https://doi.pangaea.de/10.1594/PANGAEA.418311 https://doi.org/10.1594/PANGAEA.418311 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.418311 https://doi.org/10.1594/PANGAEA.418311 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Dereviagin, Alexander Yu; Meyer, Hanno; Chizhov, Alexander B; Hubberten, Hans-Wolfgang; Simonov, Eugeniy F (2002): New data on the isotopic composition and evolution of modern ice wedges in the Laptev Sea region. Polarforschung, 70, 27-35, hdl:10013/epic.29856.d001 Area/locality Laptev Sea System LATITUDE LONGITUDE LSS Reference/source Temperature mean winter δ18O maximum minimum water Dataset 2002 ftpangaea https://doi.org/10.1594/PANGAEA.418311 2023-01-20T08:13:26Z The first step for the application of stable isotope analyses of ice wedges for the correct paleoclimatic reconstruction supposes the study of the isotopic composition of modern ice wedges and their relationship with the isotopic composition of modern precipitation. The purpose of this research is to present, to analyze and to discuss new data on isotopic composition (d18O, dD, 3H) of modern ice wedges obtained in the Laptev Sea region in 1998-99. Investigations were carried out at two sites: on Bykovsky Peninsula in 1998 and on Bol'shoy Lyakhovsky Island in 1999 and were based on the combined application of both tritium CH) and stable isotope (d18O, dD) analyses. Tritium analyses of the atmospheric precipitation collected during two field seasons show seasonal variations: high tritium concentration in snow (to a maximum of 207 TU) and low values of tritium concentration (<20 TU) in rain. High tritium concentrations are also observed in the surface water, in suprapermafrost ground waters, and in the upper part of permafrost. High tritium concentrations range between 30-40 TU and 750 TU in the studied modern ice wedges (active ice wedges), which let us believe that they are of modern growth. Such high tritium concentrations in ice wedges can not be associated with old thermonuclear tritium because of the radioactive decay. High tritium concentrations found in the snow cover in 1998/99, in the active layer and in the upper part of permafrost give evidence of modern (probably the last decade) technogenic tritium arrival from the atmosphere on to the Earth surface in the region. The comparison of the isotopic composition (d18O, dD and d-excess) of active ice wedges and modern winter precipitation in both sites shows: 1) the isotopic composition of snow correlates linearly with a slope close to 8.0 and parallel to the GMWL at both sites; 2) the mean isotopic composition of active ice wedges on Bykovsky Peninsula is in good agreement with the mean isotopic composition of modern snow; 3) the isotopic composition of ... Dataset Ice laptev Laptev Sea permafrost Polarforschung wedge* PANGAEA - Data Publisher for Earth & Environmental Science Laptev Sea ENVELOPE(100.000000,141.500000,75.000000,71.000000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Area/locality Laptev Sea System LATITUDE LONGITUDE LSS Reference/source Temperature mean winter δ18O maximum minimum water |
spellingShingle |
Area/locality Laptev Sea System LATITUDE LONGITUDE LSS Reference/source Temperature mean winter δ18O maximum minimum water Dereviagin, Alexander Yu Meyer, Hanno Chizhov, Alexander B Hubberten, Hans-Wolfgang Simonov, Eugeniy F Isotopic composition of modern ice wedges and winter precipitation in the Laptev Sea region (Table 2) |
topic_facet |
Area/locality Laptev Sea System LATITUDE LONGITUDE LSS Reference/source Temperature mean winter δ18O maximum minimum water |
description |
The first step for the application of stable isotope analyses of ice wedges for the correct paleoclimatic reconstruction supposes the study of the isotopic composition of modern ice wedges and their relationship with the isotopic composition of modern precipitation. The purpose of this research is to present, to analyze and to discuss new data on isotopic composition (d18O, dD, 3H) of modern ice wedges obtained in the Laptev Sea region in 1998-99. Investigations were carried out at two sites: on Bykovsky Peninsula in 1998 and on Bol'shoy Lyakhovsky Island in 1999 and were based on the combined application of both tritium CH) and stable isotope (d18O, dD) analyses. Tritium analyses of the atmospheric precipitation collected during two field seasons show seasonal variations: high tritium concentration in snow (to a maximum of 207 TU) and low values of tritium concentration (<20 TU) in rain. High tritium concentrations are also observed in the surface water, in suprapermafrost ground waters, and in the upper part of permafrost. High tritium concentrations range between 30-40 TU and 750 TU in the studied modern ice wedges (active ice wedges), which let us believe that they are of modern growth. Such high tritium concentrations in ice wedges can not be associated with old thermonuclear tritium because of the radioactive decay. High tritium concentrations found in the snow cover in 1998/99, in the active layer and in the upper part of permafrost give evidence of modern (probably the last decade) technogenic tritium arrival from the atmosphere on to the Earth surface in the region. The comparison of the isotopic composition (d18O, dD and d-excess) of active ice wedges and modern winter precipitation in both sites shows: 1) the isotopic composition of snow correlates linearly with a slope close to 8.0 and parallel to the GMWL at both sites; 2) the mean isotopic composition of active ice wedges on Bykovsky Peninsula is in good agreement with the mean isotopic composition of modern snow; 3) the isotopic composition of ... |
format |
Dataset |
author |
Dereviagin, Alexander Yu Meyer, Hanno Chizhov, Alexander B Hubberten, Hans-Wolfgang Simonov, Eugeniy F |
author_facet |
Dereviagin, Alexander Yu Meyer, Hanno Chizhov, Alexander B Hubberten, Hans-Wolfgang Simonov, Eugeniy F |
author_sort |
Dereviagin, Alexander Yu |
title |
Isotopic composition of modern ice wedges and winter precipitation in the Laptev Sea region (Table 2) |
title_short |
Isotopic composition of modern ice wedges and winter precipitation in the Laptev Sea region (Table 2) |
title_full |
Isotopic composition of modern ice wedges and winter precipitation in the Laptev Sea region (Table 2) |
title_fullStr |
Isotopic composition of modern ice wedges and winter precipitation in the Laptev Sea region (Table 2) |
title_full_unstemmed |
Isotopic composition of modern ice wedges and winter precipitation in the Laptev Sea region (Table 2) |
title_sort |
isotopic composition of modern ice wedges and winter precipitation in the laptev sea region (table 2) |
publisher |
PANGAEA |
publishDate |
2002 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.418311 https://doi.org/10.1594/PANGAEA.418311 |
op_coverage |
MEDIAN LATITUDE: 72.787614 * MEDIAN LONGITUDE: 124.748086 * SOUTH-BOUND LATITUDE: 71.000000 * WEST-BOUND LONGITUDE: 100.000000 * NORTH-BOUND LATITUDE: 75.000000 * EAST-BOUND LONGITUDE: 141.500000 |
long_lat |
ENVELOPE(100.000000,141.500000,75.000000,71.000000) |
geographic |
Laptev Sea |
geographic_facet |
Laptev Sea |
genre |
Ice laptev Laptev Sea permafrost Polarforschung wedge* |
genre_facet |
Ice laptev Laptev Sea permafrost Polarforschung wedge* |
op_source |
Supplement to: Dereviagin, Alexander Yu; Meyer, Hanno; Chizhov, Alexander B; Hubberten, Hans-Wolfgang; Simonov, Eugeniy F (2002): New data on the isotopic composition and evolution of modern ice wedges in the Laptev Sea region. Polarforschung, 70, 27-35, hdl:10013/epic.29856.d001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.418311 https://doi.org/10.1594/PANGAEA.418311 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.418311 |
_version_ |
1766027598233600000 |