Isotopic composition of snow and ice on the glaciers of Novaya Zemlya
In 2015–2016 during the research expeditions of Institute of Oceanology, Russian Academy of Sciences the study of stable water isotopes (18O and D) was conducted on glaciers of Novaya Zemlya. As a result, first data on isotopic composition of seasonal snow cover and glacial ice of different ages wer...
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ftdoajarticles:oai:doaj.org/article:d710180b8c834465876d05b7944f7005 2023-05-15T16:38:14+02:00 Isotopic composition of snow and ice on the glaciers of Novaya Zemlya V. N. Mikhalenko S. S. Kutuzov A. A. Ekaykin A. A. Lavrantiev A. V. Kozachek R. A. Chernov 2017-10-01T00:00:00Z https://doi.org/10.15356/2076-6734-2017-3-293-306 https://doaj.org/article/d710180b8c834465876d05b7944f7005 RU rus Nauka https://ice-snow.igras.ru/jour/article/view/396 https://doaj.org/toc/2076-6734 https://doaj.org/toc/2412-3765 2076-6734 2412-3765 doi:10.15356/2076-6734-2017-3-293-306 https://doaj.org/article/d710180b8c834465876d05b7944f7005 Лëд и снег, Vol 57, Iss 3, Pp 293-306 (2017) арктика изотопный состав ледники новая земля Science Q article 2017 ftdoajarticles https://doi.org/10.15356/2076-6734-2017-3-293-306 2023-03-19T01:40:11Z In 2015–2016 during the research expeditions of Institute of Oceanology, Russian Academy of Sciences the study of stable water isotopes (18O and D) was conducted on glaciers of Novaya Zemlya. As a result, first data on isotopic composition of seasonal snow cover and glacial ice of different ages were obtained and its connection to recent climate change has been shown. The first studies of the isotopic composition of snow cover and glacial ice at Novaya Zemlya allowed determine the average values and the range of variability of δ18O and δD. It shown that for the Northern ice cap glacial ice δ18O vary within −13.91 ÷ −15.83 ‰ with an average value of −14.93 ‰ and −103,95 ÷ −116.75 ‰ for δD at −109.88 ‰ mean value. The maximum variations were recorded for summer snow samples (−8.35 ‰ for δ18O and −55.79 ‰ for δD), as well as for the horizon of superimposed ice (−20.67 ‰ for δ18O and −151.48 ‰ for δD) where isotopic composition has been inherited from winter precipitation. Insignificant differences in the coefficients of the meteoric water regression equation for precipitation on GNIP stations and glacial ice at Novaya Zemlya indicate similar conditions of air masses and precipitation formation both at GNIP station and on glaciers. Deuterium excess showed no seasonal fluctuations, and its values did not exceed 15 ‰, which shows that the proportion of continental precipitation of moisture is very low. Analysis of isotopic profiles obtained on the glaciers of Novaya Zemlya indicated the presence of significant melting. This applies not only to the modern shallow horizons, but also to the part of the glacial strata that formed in the highest part of the archipelago close to ice divide and came to the surface at the Serp i Molot Glacier tongue. Therefore, in terms of ice core palaeogeographic reconstructions the most interesting site is the highest part of the Northern ice cap where it is possible to assume the existence of colder horizons formed during the Little Ice Age and where the seasonal geochemical signal may be ... Article in Journal/Newspaper Ice cap ice core Novaya Zemlya Арктика Directory of Open Access Journals: DOAJ Articles Molot ENVELOPE(132.817,132.817,59.383,59.383) Serp ENVELOPE(67.100,67.100,-71.983,-71.983) Ice and Snow 57 3 293 306 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
арктика изотопный состав ледники новая земля Science Q |
spellingShingle |
арктика изотопный состав ледники новая земля Science Q V. N. Mikhalenko S. S. Kutuzov A. A. Ekaykin A. A. Lavrantiev A. V. Kozachek R. A. Chernov Isotopic composition of snow and ice on the glaciers of Novaya Zemlya |
topic_facet |
арктика изотопный состав ледники новая земля Science Q |
description |
In 2015–2016 during the research expeditions of Institute of Oceanology, Russian Academy of Sciences the study of stable water isotopes (18O and D) was conducted on glaciers of Novaya Zemlya. As a result, first data on isotopic composition of seasonal snow cover and glacial ice of different ages were obtained and its connection to recent climate change has been shown. The first studies of the isotopic composition of snow cover and glacial ice at Novaya Zemlya allowed determine the average values and the range of variability of δ18O and δD. It shown that for the Northern ice cap glacial ice δ18O vary within −13.91 ÷ −15.83 ‰ with an average value of −14.93 ‰ and −103,95 ÷ −116.75 ‰ for δD at −109.88 ‰ mean value. The maximum variations were recorded for summer snow samples (−8.35 ‰ for δ18O and −55.79 ‰ for δD), as well as for the horizon of superimposed ice (−20.67 ‰ for δ18O and −151.48 ‰ for δD) where isotopic composition has been inherited from winter precipitation. Insignificant differences in the coefficients of the meteoric water regression equation for precipitation on GNIP stations and glacial ice at Novaya Zemlya indicate similar conditions of air masses and precipitation formation both at GNIP station and on glaciers. Deuterium excess showed no seasonal fluctuations, and its values did not exceed 15 ‰, which shows that the proportion of continental precipitation of moisture is very low. Analysis of isotopic profiles obtained on the glaciers of Novaya Zemlya indicated the presence of significant melting. This applies not only to the modern shallow horizons, but also to the part of the glacial strata that formed in the highest part of the archipelago close to ice divide and came to the surface at the Serp i Molot Glacier tongue. Therefore, in terms of ice core palaeogeographic reconstructions the most interesting site is the highest part of the Northern ice cap where it is possible to assume the existence of colder horizons formed during the Little Ice Age and where the seasonal geochemical signal may be ... |
format |
Article in Journal/Newspaper |
author |
V. N. Mikhalenko S. S. Kutuzov A. A. Ekaykin A. A. Lavrantiev A. V. Kozachek R. A. Chernov |
author_facet |
V. N. Mikhalenko S. S. Kutuzov A. A. Ekaykin A. A. Lavrantiev A. V. Kozachek R. A. Chernov |
author_sort |
V. N. Mikhalenko |
title |
Isotopic composition of snow and ice on the glaciers of Novaya Zemlya |
title_short |
Isotopic composition of snow and ice on the glaciers of Novaya Zemlya |
title_full |
Isotopic composition of snow and ice on the glaciers of Novaya Zemlya |
title_fullStr |
Isotopic composition of snow and ice on the glaciers of Novaya Zemlya |
title_full_unstemmed |
Isotopic composition of snow and ice on the glaciers of Novaya Zemlya |
title_sort |
isotopic composition of snow and ice on the glaciers of novaya zemlya |
publisher |
Nauka |
publishDate |
2017 |
url |
https://doi.org/10.15356/2076-6734-2017-3-293-306 https://doaj.org/article/d710180b8c834465876d05b7944f7005 |
long_lat |
ENVELOPE(132.817,132.817,59.383,59.383) ENVELOPE(67.100,67.100,-71.983,-71.983) |
geographic |
Molot Serp |
geographic_facet |
Molot Serp |
genre |
Ice cap ice core Novaya Zemlya Арктика |
genre_facet |
Ice cap ice core Novaya Zemlya Арктика |
op_source |
Лëд и снег, Vol 57, Iss 3, Pp 293-306 (2017) |
op_relation |
https://ice-snow.igras.ru/jour/article/view/396 https://doaj.org/toc/2076-6734 https://doaj.org/toc/2412-3765 2076-6734 2412-3765 doi:10.15356/2076-6734-2017-3-293-306 https://doaj.org/article/d710180b8c834465876d05b7944f7005 |
op_doi |
https://doi.org/10.15356/2076-6734-2017-3-293-306 |
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Ice and Snow |
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57 |
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293 |
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