Thermal state of the active layer and permafrost along the Qinghai-Xizang (Tibet) Railway from 2006 to 2010
In this study, we investigated changes in active layer thickness (ALT) and permafrost temperatures at different depths using data from the permafrost monitoring network along the Qinghai-Xizang (Tibet) Railway (QXR) since 2005. Among these sites, mean ALT is ~3.1 m, with a range of ~1.1 to 5.9 m. Fr...
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ftcopernicus:oai:publications.copernicus.org:tc11704 2023-05-15T13:03:00+02:00 Thermal state of the active layer and permafrost along the Qinghai-Xizang (Tibet) Railway from 2006 to 2010 Wu, Q. Zhang, T. Liu, Y. 2018-09-27 application/pdf https://doi.org/10.5194/tc-6-607-2012 https://tc.copernicus.org/articles/6/607/2012/ eng eng doi:10.5194/tc-6-607-2012 https://tc.copernicus.org/articles/6/607/2012/ eISSN: 1994-0424 Text 2018 ftcopernicus https://doi.org/10.5194/tc-6-607-2012 2020-07-20T16:25:48Z In this study, we investigated changes in active layer thickness (ALT) and permafrost temperatures at different depths using data from the permafrost monitoring network along the Qinghai-Xizang (Tibet) Railway (QXR) since 2005. Among these sites, mean ALT is ~3.1 m, with a range of ~1.1 to 5.9 m. From 2006 through 2010, ALT has increased at a rate of ~6.3 cm a −1 . The mean rate of permafrost temperature rise at the depth of 6.0 m is ~0.02 °C a −1 , estimated by linear regression using 5 yr of data, and the mean rate of mean annual ground temperature (MAGT) rise at a depth of zero amplitude is ~0.012 °C a −1 . Changes for colder permafrost (MAGT <−1.0 °C) are greater than changes for relatively warmer permafrost (MAGT >−1.0 °C). This is consistent with results observed in the Arctic and subarctic. Text Active layer thickness Arctic permafrost Subarctic Copernicus Publications: E-Journals Arctic The Cryosphere 6 3 607 612 |
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Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
In this study, we investigated changes in active layer thickness (ALT) and permafrost temperatures at different depths using data from the permafrost monitoring network along the Qinghai-Xizang (Tibet) Railway (QXR) since 2005. Among these sites, mean ALT is ~3.1 m, with a range of ~1.1 to 5.9 m. From 2006 through 2010, ALT has increased at a rate of ~6.3 cm a −1 . The mean rate of permafrost temperature rise at the depth of 6.0 m is ~0.02 °C a −1 , estimated by linear regression using 5 yr of data, and the mean rate of mean annual ground temperature (MAGT) rise at a depth of zero amplitude is ~0.012 °C a −1 . Changes for colder permafrost (MAGT <−1.0 °C) are greater than changes for relatively warmer permafrost (MAGT >−1.0 °C). This is consistent with results observed in the Arctic and subarctic. |
format |
Text |
author |
Wu, Q. Zhang, T. Liu, Y. |
spellingShingle |
Wu, Q. Zhang, T. Liu, Y. Thermal state of the active layer and permafrost along the Qinghai-Xizang (Tibet) Railway from 2006 to 2010 |
author_facet |
Wu, Q. Zhang, T. Liu, Y. |
author_sort |
Wu, Q. |
title |
Thermal state of the active layer and permafrost along the Qinghai-Xizang (Tibet) Railway from 2006 to 2010 |
title_short |
Thermal state of the active layer and permafrost along the Qinghai-Xizang (Tibet) Railway from 2006 to 2010 |
title_full |
Thermal state of the active layer and permafrost along the Qinghai-Xizang (Tibet) Railway from 2006 to 2010 |
title_fullStr |
Thermal state of the active layer and permafrost along the Qinghai-Xizang (Tibet) Railway from 2006 to 2010 |
title_full_unstemmed |
Thermal state of the active layer and permafrost along the Qinghai-Xizang (Tibet) Railway from 2006 to 2010 |
title_sort |
thermal state of the active layer and permafrost along the qinghai-xizang (tibet) railway from 2006 to 2010 |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-6-607-2012 https://tc.copernicus.org/articles/6/607/2012/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Active layer thickness Arctic permafrost Subarctic |
genre_facet |
Active layer thickness Arctic permafrost Subarctic |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-6-607-2012 https://tc.copernicus.org/articles/6/607/2012/ |
op_doi |
https://doi.org/10.5194/tc-6-607-2012 |
container_title |
The Cryosphere |
container_volume |
6 |
container_issue |
3 |
container_start_page |
607 |
op_container_end_page |
612 |
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1766325956676419584 |