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| Titel |
Thermal remote sensing of ice-debris landforms using ASTER: an example from the Chilean Andes |
| VerfasserIn |
A. Brenning, M. A. Peña, S. Long, Aiman Soliman |
| 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. 2 ; Nr. 6, no. 2 (2012-03-30), S.367-382 |
| Datensatznummer |
250003485
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| Publikation (Nr.) |
 copernicus.org/tc-6-367-2012.pdf |
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| Zusammenfassung |
| Remote sensors face challenges in characterizing mountain permafrost and
ground thermal conditions or mapping rock glaciers and debris-covered
glaciers. We explore the potential of thermal imaging and in particular
thermal inertia mapping in mountain cryospheric research, focusing on the
relationships between ground surface temperatures and the presence of
ice-debris landforms on one side and land surface temperature (LST) and
apparent thermal inertia (ATI) on the other. In our case study we utilize
ASTER daytime and nighttime imagery and in-situ measurements of near-surface
ground temperature (NSGT) in the Mediterranean Andes during a snow-free and
dry observation period in late summer. Spatial patterns of LST and NSGT were
mostly consistent with each other both at daytime and at nighttime. Daytime
LST over ice-debris landforms was decreased and ATI consequently increased
compared to other debris surfaces under otherwise equal conditions, but NSGT
showed contradictory results, which underlines the complexity and possible
scale dependence of ATI in heterogeneous substrates with the presence of a
thermal mismatch and a heat sink at depth. While our results demonstrate the
utility of thermal imaging and ATI mapping in a mountain cryospheric
context, further research is needed for a better interpretation of ATI
patterns in complex thermophysical conditions. |
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