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| Titel |
Thermal state of the active layer and permafrost along the Qinghai-Xizang (Tibet) Railway from 2006 to 2010 |
| VerfasserIn |
Q. Wu, T. Zhang, Y. Liu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 6, no. 3 ; Nr. 6, no. 3 (2012-05-31), S.607-612 |
| Datensatznummer |
250003594
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| Publikation (Nr.) |
 copernicus.org/tc-6-607-2012.pdf |
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| Zusammenfassung |
| 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. |
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