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| Titel |
Landsat TM and ETM+ derived snowline altitudes in the Cordillera Huayhuash and Cordillera Raura, Peru, 1986-2005 |
| VerfasserIn |
E. M. McFadden, J. Ramage, D. T. Rodbell |
| 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 ; 5, no. 2 ; Nr. 5, no. 2 (2011-05-23), S.419-430 |
| Datensatznummer |
250002433
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| Publikation (Nr.) |
 copernicus.org/tc-5-419-2011.pdf |
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| Zusammenfassung |
The Cordilleras Huayhuash and Raura are remote glacierized ranges in the
Andes Mountains of Peru. A robust assessment of modern glacier change is
important for understanding how regional change affects Andean communities,
and for placing paleo-glaciers in a context relative to modern glaciation
and climate. Snowline altitudes (SLAs) derived from satellite imagery are
used as a proxy for modern (1986–2005) local climate change in a key
transition zone in the Andes.
Clear sky, dry season Landsat Thematic Mapper (TM) and Enhanced Thematic
Mapper (ETM+) satellite images from 1986–2005 were used to identify snowline
positions, and their altitude ranges were extracted from an Advanced
Spaceborne Thermal Emission and Reflection Radiometer (ASTER) digital
elevation model (DEM). Based on satellite records from 31 glaciers, average
snowline altitudes (SLAs), an approximation for the equilibrium line
altitude (ELA), for the Cordillera Huayhuash (13 glaciers) and Cordillera
Raura (18 glaciers) from 1986–2005 were 5051 m a.s.l. from 1986–2005 and
5006 m a.s.l. from 1986–2002, respectively. During the same time period,
the Cordillera Huayhuash SLA experienced no significant change while the
Cordillera Raura SLA rose significantly from 4947 m a.s.l. to 5044 m a.s.l. |
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