Rock glaciers, Bernese Alps, western Switzerland  View Catalog Page Entry ID
GGD286
Summary
This inventory has been established from the results of the interpretation of aerial photographs and field work between 1992 and 1994.
The area investigated covers the entire Bernese Alps (western Switzerland), about 4200 km2, and is situated between 46 deg 10' and 46 deg 50' N and 7 deg 10' and 8 deg 30' E. The Bernese Alps are one of the main European watersheds, separating the catchment area of the Aare (draining into the North Sea via the Rhine) from that of the Rhone (which flows into the Mediterranean Sea). The lowest points of the study area are situated in the valley floors of the two rivers at about 500 m asl, whereas several summits exceed 4000 m asl (highest point-- Finsteraarhorn, 4273 m asl). The main structure of the Bernese Alps is the crystalline Aar massif striking WSW-ENE and culminating in the western part of the study area. To the north and the west, the massif is covered by thrust nappes consisting of sedimentary rocks mainly of Mesozoic and early Tertiary age (chiefly marine limestones, shales, and sandstones). Their summits are considerably lower (mostly between 2000 and 3500 m asl).
According to their geographic situation between 46 deg and 47 deg N, the climate of the Bernese Alps is of temperate character typical for the zone of the westerlies. Because of the their horizontal and vertical extension, the Alps themselves have considerable influence on the climate. Based on climatic criteria, two main realms can be distinguished: the moist and quite oceanic part in the north of the main watershed and the slightly more continental part sloping south to the Rhone. The northern part, exposed to the westerlies, shows maximum precipitation during summer, with quite low variability, whereas the south is somewhat dryer, showing no distinct maximum but higher variability. Accordingly, mean cloudiness is higher in the north. This results in an increase in the height of the mean glacier elevation from about 2500 m asl in the northern part of the Bernese Alps to 2900 m asl in the south. Because of the high precipitation (locally exceeding 4000 mm per year) and their external situation, the Bernese Alps show a lower equilibrium line of the glaciers and are the mountain group showing the heaviest glacierization of the Alps, which leaves little space for periglacial phenomena (both the glacier showing the lowermost front and the largest glacier of the Alps are situated within the study site). However, this does not mean that permafrost is rare in the Bernese Alps; above 3300 m asl, permafrost can be considered as continuous. In fact, the bedrock of many of the higher mountains in the Bernese Alps is perennially frozen. The number of rock glaciers found in the Bernese Alps is relatively small compared with other Alpine regions. Furthermore, the objects are quite small. This can be explained with the stronger glacierization. Modelling shows that permafrost ground amounts to roughly half as much as the glacierized area (subglacial permafrost not included). (Imhof, 1996) These data are presented on the CAPS Version 1.0 CD-ROM, June 1998.
Geographic Coverage
Spatial Coordinates:
N: 46.833°
S: 46.167°
E: 8.5°
W: 7.167°
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Data Set Citation
Dataset Creator: Imhof, M.
Dataset Title: Rock glaciers, Bernese Alps, western Switzerland
Dataset Release Date: 1998-01-01
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/ggd286.html
Temporal Coverage
Start Date: 1992-01-01
Stop Date: 1994-12-31
Location Keywords
- CONTINENT EUROPE WESTERN EUROPE SWITZERLAND BERNESE ALPS, WESTERN SWITZERLAND
Science Keywords
- Cryosphere Frozen Ground Periglacial Processes
- Cryosphere Frozen Ground Rock Glaciers
- Land Surface Frozen Ground Periglacial Processes
- Land Surface Frozen Ground Rock Glaciers
Ancillary Keywords
- Field Investigations
- Mapping
- Remote Sensing
- Rock Glaciers
Data Center
National Snow and Ice Data Center
Data Center URL: http://nsidc.org
Data Center Personnel
Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:
- National Snow and Ice Data Center
- CIRES, 449 UCB
- University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
NSIDC Frozen Ground Data Center
Data Center URL: http://nsidc.org/fgdc/
Data Center Personnel
Name: NSIDC FGDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:
- National Snow and Ice Data Center
- CIRES, 449 UCB
- University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
Distribution
Distribution Media: FTP
Distribution Format: ASCII Text
Personnel
Markus Imhof
Role: INVESTIGATOR
Phone: 41 31 631 8567
Fax: 41 31 631 8511
Email: imhof@giub.unibe.ch
Contact Address:
- ersit of Bern
- Institute of Geography, Group for Applied
- Hallerstrasse 12
City: Bern
Postal Code: CH-3012
Country: Switzerland
Metadata Name and Version
Metadata Name: CEOS IDN DIF
Metadata Version: 9.7
Creation and Review Dates
DIF Creation Date: 1998-01-01
Last DIF Revision Date: 2012-08-29
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