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| Titel |
Assessing high altitude glacier thickness, volume and area changes using field, GIS and remote sensing techniques: the case of Nevado Coropuna (Peru) |
| VerfasserIn |
P. Peduzzi, C. Herold, W. Silverio |
| 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 ; 4, no. 3 ; Nr. 4, no. 3 (2010-08-23), S.313-323 |
| Datensatznummer |
250001765
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| Publikation (Nr.) |
 copernicus.org/tc-4-313-2010.pdf |
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| Zusammenfassung |
| Higher temperatures and changes in precipitation patterns have induced an
acute decrease in Andean glaciers, thus leading to additional stress on
water supply. To adapt to climate changes, local governments need
information on the rate of glacier area and volume losses and on current ice
thickness. Remote sensing analyses of Coropuna glacier (Peru) delineate an
acute glaciated area decline between 1955 and 2008. We tested how volume
changes can be estimated with remote sensing and GIS techniques using
digital elevation models derived from both topographic maps and satellite
images. Ice thickness was measured in 2004 using a Ground Penetrating Radar
coupled with a Ground Positioning System during a field expedition. It
provided profiles of ice thickness on different slopes, orientations and
altitudes. These were used to model the current glacier volume using
Geographical Information System and statistical multiple regression
techniques. The results revealed a significant glacier volume loss; however
the uncertainty is higher than the measured volume loss. We also provided an
estimate of the remaining volume. The field study provided the scientific
evidence needed by COPASA, a local Peruvian NGO, and GTZ, the German
international cooperation agency, in order to alert local governments and
communities and guide them in adopting new climate change adaptation
policies. |
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