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| DOI | 10.1080/00167223.2015.1026917 | ||||
| Año | 2015 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
A new inventory record of satellite-derived area, length, elevation range and surface slope changes from the mid-1980s to late 2000s/2011 for 317 land-terminating glaciers and ice caps (GIC) is presented. The investigated GIC are located in 12 geographic regions throughout the circumpolar Arctic and sub-Arctic. This geographic subdivision allows us to examine regional variations in recent glacier changes. The method is based on a semi-automated classification approach which extracts GIC extent from satellite scenes. Most of the observed GIC show a reduction in area, length, elevation range and slope. On regional scale, the observed GIC changed in area between -4 +/- 3% (Nuuk, West Greenland; 1987-2003) and -40 +/- 4% (Talkeetna, southern Alaska; 1987-2011), equal to shrinking rates between -0.2% yr(-1) and -1.7% yr(-1). The regional change in length was between -36 +/- 13 m (southern British Columbia; 1985-2011) and -481 +/- 85 m (southern Ellesmere Island; 1988-2009), equal to -1 +/- 0.5 m yr(-1) and -23 +/- 4 m yr(-1). Regional GIC changes can be illustrated by power-law scaling relationships between GIC area and length, elevation range, and surface slope. Here, we find regional variability in scaling parameters in both time and space, which should be considered when estimating global assessments of GIC conditions and changes over time.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Mernild, Sebastian H. | Hombre |
Ctr Sci Studies - Chile
Los Alamos Natl Lab - Estados Unidos Centro de Estudios Científicos - Chile Los Alamos National Laboratory - Estados Unidos |
| 2 | Malmros, Jeppe K. | Hombre |
Ctr Sci Studies - Chile
Univ Copenhagen - Dinamarca Centro de Estudios Científicos - Chile Københavns Universitet - Dinamarca |
| 3 | Yde, Jacob C. | Hombre |
Sogn & Fjordane Univ Coll - Noruega
Western Norway University of Applied Sciences - Noruega |
| 4 | De Villiers, Simon | Hombre |
Sogn & Fjordane Univ Coll - Noruega
Western Norway University of Applied Sciences - Noruega |
| 5 | Knudsen, N. Tvis | Hombre |
Aarhus Univ - Dinamarca
Aarhus Universitet - Dinamarca |
| 6 | Wilson, Ryan | Hombre |
Ctr Sci Studies - Chile
Centro de Estudios Científicos - Chile |
| Fuente |
|---|
| European Community |
| U.S. Department of Energy |
| Seventh Framework Programme |
| Office of Science |
| National Nuclear Security Administration |
| Los Alamos National Laboratory |
| National Nuclear Security Administration of the U.S. Department of Energy |
| Los Alamos National Laboratory (LANL) |
| Earth System Modelling program within the U.S. Department of Energy's Office of Science |
| Agradecimiento |
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| We extend a very special thanks to the anonymous reviewers for their insightful critique of this article. This work was supported partly by the Earth System Modelling program within the U.S. Department of Energy's Office of Science, by Los Alamos National Laboratory (LANL), and by the European Community's Seventh Framework Programme under grant agreement No. 262693. LANL is operated under the auspices of the National Nuclear Security Administration of the U.S. Department of Energy under Contract No. DE-AC52-06NA25396). All satellite data were acquired through the USGS Earth Explorer internet portal (http://earthexplorer.usgs.gov/). |
| We extend a very special thanks to the anonymous reviewers for their insightful critique of this article. This work was supported partly by the Earth System Modelling program within the U.S. Department of Energy’s Office of Science, by Los Alamos National Laboratory (LANL), and by the European Community’s Seventh Framework Programme under grant agreement No. 262693. LANL is operated under the auspices of the National Nuclear Security Administration of the U.S. Department of Energy under Contract No. DE-AC52-06NA25396). All satellite data were acquired through the USGS Earth Explorer internet portal (http://earthexplorer.usgs.gov/). |