Changes of hydrothermal structure of Austre Grønfjordbreen and Fridtjovbreen Glaciers in Svalbard
The results of ground-based RES studies (20 MHz) at the Austre Grønfjordbreen and Fridtjovbreen glaciers on Nordenskiöld Land, Svalbard, spring 2010–2012, were compared with previous airborne RES data (620 MHz) of 1979 to understand the hydrothermal structure and its changes with time for these twin...
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ftdoajarticles:oai:doaj.org/article:607333c292ab419cadf9ba695a90aacc 2023-05-15T17:24:13+02:00 Changes of hydrothermal structure of Austre Grønfjordbreen and Fridtjovbreen Glaciers in Svalbard E. V. Vasilenko A. F. Glazovsky I. I. Lavrentiev Yu. Ya. Macheret 2015-03-01T00:00:00Z https://doi.org/10.15356/2076-6734-2014-1-5-19 https://doaj.org/article/607333c292ab419cadf9ba695a90aacc RU rus Nauka https://ice-snow.igras.ru/jour/article/view/19 https://doaj.org/toc/2076-6734 https://doaj.org/toc/2412-3765 2076-6734 2412-3765 doi:10.15356/2076-6734-2014-1-5-19 https://doaj.org/article/607333c292ab419cadf9ba695a90aacc Лëд и снег, Vol 54, Iss 1, Pp 5-19 (2015) вода в ледниках гидротермическая структура радиозондирование ледников шпицберген Science Q article 2015 ftdoajarticles https://doi.org/10.15356/2076-6734-2014-1-5-19 2023-03-19T01:40:13Z The results of ground-based RES studies (20 MHz) at the Austre Grønfjordbreen and Fridtjovbreen glaciers on Nordenskiöld Land, Svalbard, spring 2010–2012, were compared with previous airborne RES data (620 MHz) of 1979 to understand the hydrothermal structure and its changes with time for these twinned glaciers. Temperature measurements in 9 shallow ice bore holes (down to 20 m) of spring 2013, and other RES and bore-hole data (1977–2005) were also considered. Both glaciers now are polythermal ones. The ratio of cold/temperate ice volumes in Austre Grønfjordbreen is 83 and 17 per cent, and in Fridtjovbreen is 26 and 74 per cent. The water content in temperate ice estimated from radio wave velocity is ca. 2–5%. Total water content in temperate ice of Austre Grønfjordbreen is estimated as 1,8–4,5∙10−3 km3, and in Fridtjovbreen as 74–85∙10−3 km3. Over the past 33 years (1979–2012) the average thickness of the cold ice in Austre Grønfjordbreen decreased by about 34 m, and thickness of temperate ice by 9 m. In Fridtjovbreen the cold ice has thinned by 87 m, but the temperate ice became thicker by 48 m. These differences in hydrothermal structure changes of the neighboring glaciers with common climatic history are attributed to the additional effect of Fridtjovbreen surge in 1991–1997 resulted in its additional internal heating. Article in Journal/Newspaper Nordenskiöld Land Svalbard Directory of Open Access Journals: DOAJ Articles Svalbard Nordenskiöld Land ENVELOPE(15.000,15.000,77.833,77.833) Fridtjovbreen ENVELOPE(14.450,14.450,77.830,77.830) Austre Grønfjordbreen ENVELOPE(14.339,14.339,77.918,77.918) Ice and Snow 125 1 5 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
вода в ледниках гидротермическая структура радиозондирование ледников шпицберген Science Q |
spellingShingle |
вода в ледниках гидротермическая структура радиозондирование ледников шпицберген Science Q E. V. Vasilenko A. F. Glazovsky I. I. Lavrentiev Yu. Ya. Macheret Changes of hydrothermal structure of Austre Grønfjordbreen and Fridtjovbreen Glaciers in Svalbard |
topic_facet |
вода в ледниках гидротермическая структура радиозондирование ледников шпицберген Science Q |
description |
The results of ground-based RES studies (20 MHz) at the Austre Grønfjordbreen and Fridtjovbreen glaciers on Nordenskiöld Land, Svalbard, spring 2010–2012, were compared with previous airborne RES data (620 MHz) of 1979 to understand the hydrothermal structure and its changes with time for these twinned glaciers. Temperature measurements in 9 shallow ice bore holes (down to 20 m) of spring 2013, and other RES and bore-hole data (1977–2005) were also considered. Both glaciers now are polythermal ones. The ratio of cold/temperate ice volumes in Austre Grønfjordbreen is 83 and 17 per cent, and in Fridtjovbreen is 26 and 74 per cent. The water content in temperate ice estimated from radio wave velocity is ca. 2–5%. Total water content in temperate ice of Austre Grønfjordbreen is estimated as 1,8–4,5∙10−3 km3, and in Fridtjovbreen as 74–85∙10−3 km3. Over the past 33 years (1979–2012) the average thickness of the cold ice in Austre Grønfjordbreen decreased by about 34 m, and thickness of temperate ice by 9 m. In Fridtjovbreen the cold ice has thinned by 87 m, but the temperate ice became thicker by 48 m. These differences in hydrothermal structure changes of the neighboring glaciers with common climatic history are attributed to the additional effect of Fridtjovbreen surge in 1991–1997 resulted in its additional internal heating. |
format |
Article in Journal/Newspaper |
author |
E. V. Vasilenko A. F. Glazovsky I. I. Lavrentiev Yu. Ya. Macheret |
author_facet |
E. V. Vasilenko A. F. Glazovsky I. I. Lavrentiev Yu. Ya. Macheret |
author_sort |
E. V. Vasilenko |
title |
Changes of hydrothermal structure of Austre Grønfjordbreen and Fridtjovbreen Glaciers in Svalbard |
title_short |
Changes of hydrothermal structure of Austre Grønfjordbreen and Fridtjovbreen Glaciers in Svalbard |
title_full |
Changes of hydrothermal structure of Austre Grønfjordbreen and Fridtjovbreen Glaciers in Svalbard |
title_fullStr |
Changes of hydrothermal structure of Austre Grønfjordbreen and Fridtjovbreen Glaciers in Svalbard |
title_full_unstemmed |
Changes of hydrothermal structure of Austre Grønfjordbreen and Fridtjovbreen Glaciers in Svalbard |
title_sort |
changes of hydrothermal structure of austre grønfjordbreen and fridtjovbreen glaciers in svalbard |
publisher |
Nauka |
publishDate |
2015 |
url |
https://doi.org/10.15356/2076-6734-2014-1-5-19 https://doaj.org/article/607333c292ab419cadf9ba695a90aacc |
long_lat |
ENVELOPE(15.000,15.000,77.833,77.833) ENVELOPE(14.450,14.450,77.830,77.830) ENVELOPE(14.339,14.339,77.918,77.918) |
geographic |
Svalbard Nordenskiöld Land Fridtjovbreen Austre Grønfjordbreen |
geographic_facet |
Svalbard Nordenskiöld Land Fridtjovbreen Austre Grønfjordbreen |
genre |
Nordenskiöld Land Svalbard |
genre_facet |
Nordenskiöld Land Svalbard |
op_source |
Лëд и снег, Vol 54, Iss 1, Pp 5-19 (2015) |
op_relation |
https://ice-snow.igras.ru/jour/article/view/19 https://doaj.org/toc/2076-6734 https://doaj.org/toc/2412-3765 2076-6734 2412-3765 doi:10.15356/2076-6734-2014-1-5-19 https://doaj.org/article/607333c292ab419cadf9ba695a90aacc |
op_doi |
https://doi.org/10.15356/2076-6734-2014-1-5-19 |
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Ice and Snow |
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125 |
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1766115160736399360 |