 |
| Titel |
Permafrost distribution in the European Alps: calculation and evaluation of an index map and summary statistics |
| VerfasserIn |
L. Boeckli, A. Brenning, S. Gruber, J. Noetzli |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1994-0416
|
| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 6, no. 4 ; Nr. 6, no. 4 (2012-07-27), S.807-820 |
| Datensatznummer |
250003693
|
| Publikation (Nr.) |
 copernicus.org/tc-6-807-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
The objective of this study is the production of an Alpine Permafrost Index
Map (APIM) covering the entire European Alps. A unified statistical model
that is based on Alpine-wide permafrost observations is used for debris and
bedrock surfaces across the entire Alps. The explanatory variables of the
model are mean annual air temperatures, potential incoming solar radiation
and precipitation. Offset terms were applied to make model predictions for
topographic and geomorphic conditions that differ from the terrain features
used for model fitting. These offsets are based on literature review and
involve some degree of subjective choice during model building. The
assessment of the APIM is challenging because limited independent test data
are available for comparison and these observations represent point
information in a spatially highly variable topography. The APIM provides an
index that describes the spatial distribution of permafrost and comes
together with an interpretation key that helps to assess map uncertainties
and to relate map contents to their actual expression in the terrain. The map can
be used as a first resource to estimate permafrost conditions at any given
location in the European Alps in a variety of contexts such as research and
spatial planning.
Results show that Switzerland likely is the country with the largest
permafrost area in the Alps, followed by Italy, Austria, France and Germany.
Slovenia and Liechtenstein may have marginal permafrost areas. In all
countries the permafrost area is expected to be larger than the
glacier-covered area. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|