Close

Service Interruption

The NSIDC Web site and data services are currently having intermittent problems and may be unavailable. We are working to restore these services as soon as possible and apologize for any inconvenience this may cause. Please contact NSIDC User Services for assistance.



Rock glaciers Gruben, Muragl and Murtel, Switzerland: Area-wide flow fields

View Catalog Page


Identification Information:

Dataset Identifier:

GGD293

Citation:

Citation Information:

Originator: Kaeaeb, A
Publication Date: 19980101
Title: Rock glaciers Gruben, Muragl and Murtel, Switzerland: Area-wide flow fields
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC: National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/ggd293.html

Description:

Abstract:

Besides their thermal and mechanical properties, rock glaciers are essentially defined by their kinematics. Knowledge of the permafrost flow field provides important information about the origin, morphology, development, dynamics and internal structure of creeping mountain permafrost. Monitoring permafrost behavior helps detecting climate signals.

Aerial photogrammetry was used for determining digital terrain models (DTM) with high resolution. The differences of multitemporal DTMs of a rock glacier provide the vertical changes of the permafrost surface. Horizontal surface displacements were obtained by simultaneously comparing two aerial photographs taken at different times and from different positions (Kaeaeb 1996a,b; Kaeaeb et al.1998). Repeated overridings by the nearby glacier affected the upper part of the Gruben rock glacier, Wallis. Compared to the lower, periglacial part of the rock glacier the higher surface lowering rates of the debris-covered dead ice remains indicate the dead ice being out of equilibrium. Due to different internal structure and different slopes, horizontal surface velocities show different creep directions as well as different creep rates. The rock glacier advances by about 12 cm/a. A 25-year time series of photogrammetrical monitoring (1970-1995) documents the temporal variations of surface kinematics of the rock glacier (Kaeaeb et al. 1998a). Surface kinematics of Muragl rock glacier (Upper Engadin) over the period from 1981 to 1994 reveal this rock glacier to be a complex system of several individual streams. Changes in elevation show a pattern of zones of surface heave and subsidence in the range of +- 10 cm/a. The rock glacier advances by about 5 cm/a (Kaeaeb 1998). The velocity field 1987-1996 at the surface of Murtel rock glacier, Upper Engadin, points to two dynamically different parts of the creeping permafrost-- (1) high activity and transverse ridges in the inner part and (2) lower activity at the left and right margins. The ridges are advected down stream with a velocity approximately equal to the surface velocity. Stream lines can be interpolated from the surface velocity field. The curvature of the isochrones on Murtel rock glacier is similar to the curvature of the transverse ridges, which suggests slow changes in the flow field (Kaeaeb 1998, Kaeaeb et al. 1998b). These data are presented on the CAPS Version 1.0 CD-ROM, June 1998.

Purpose: scientific research

Documentation:

User's Guide:

Citation Information:

Originator: Kaeaeb, A
Publication Date: 19980101
Title: Rock glaciers Gruben, Muragl and Murtel, Switzerland: Area-wide flow fields
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC: National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/docs/fgdc/ggd293_rockglac_switzer/index.html

Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 19700101
Ending Date: 19941231

Currentness Reference: publication date

Status:

Progress: Complete
Maintenance and Update Frequency: Unknown

Spatial Domain:

Bounding Coordinates:

 

West Bounding Coordinate: 7.964°
East Bounding Coordinate: 9.933°
North Bounding Coordinate: 46.506°
South Bounding Coordinate: 46.169°

Keywords:

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Science Keywords
Theme Keyword: EARTH SCIENCE Cryosphere Frozen Ground Periglacial Processes
Theme Keyword: EARTH SCIENCE Cryosphere Frozen Ground Permafrost Mountain Permafrost
Theme Keyword: EARTH SCIENCE Cryosphere Frozen Ground Rock Glaciers
Theme Keyword: EARTH SCIENCE Land Surface Frozen Ground Periglacial Processes
Theme Keyword: EARTH SCIENCE Land Surface Frozen Ground Permafrost Mountain Permafrost
Theme Keyword: EARTH SCIENCE Land Surface Frozen Ground Rock Glaciers

Theme:

Theme Keyword Thesaurus: None
Theme Keyword:

Theme:

Theme Keyword Thesaurus: None
Theme Keyword: Permafrost Properties
Theme Keyword: Remote Sensing
Theme Keyword: Rock Glaciers
Theme Keyword: Slope Processes

Place:

Place Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Location Keywords
Place Keyword: Continent Europe Western Europe Switzerland Saas valley, Valais Alps; Upper Engadine, Switzerland

Access Constraints:

None

Use Constraints:

None

Point of Contact:

Contact Information:

Contact Person Primary:

Contact Person: Andreas Kaeaeb
Contact Organization: University of Zurich-Irchel, Department of Geography, Physical Geography Division

Contact Address:

Address Type: mailing
Address:
  • Winterthurerstr. 190
City: Zurich
State or Province: Unknown
Postal Code: CH-8057
Country: Switzerland

Contact Voice Telephone: 41 1 6355146
Contact Facsimile Telephone: 41 1 635 6848
Contact Electronic Mail Address: kaeaeb@geo.unizh.ch

Back to Top


Distribution Information:

Distributor:

Contact Information:

Contact Organization Primary:

Contact Organization: National Snow and Ice Data Center
Contact Person: NSIDC User Services

Contact Address:

Address Type: mailing
Address:
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199
Contact Facsimile Telephone: 1 303 492-2468
Contact Electronic Mail Address: nsidc@nsidc.org

Resource Description:

GGD293

Distribution Liability:

NSIDC cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NSIDC makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

Back to Top


Metadata Reference Information:

Metadata Date:

20120829

Metadata Review Date:

20120829

Metadata Contact:

Contact Information:

Contact Person Primary:

Contact Person: NSIDC User Services
Contact Organization: National Snow and Ice Data Center

Contact Address:

Address Type: mailing
Address:
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199
Contact Facsimile Telephone: 1 303 492-2468
Contact Electronic Mail Address: nsidc@nsidc.org

Metadata Standard Name:

FGDC Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata

Metadata Standard Version:

FGDC-STD-012-2002

Back to Top

Metadata Views

FGDC Text-Only

Federal Geographic Data Committee (FGDC) in plain text

FGDC XML

Federal Geographic Data Committee (FGDC) in Extensible Markup Language (XML)

DIF HTML

NASA Global Change Master Directory (GCMD) Directory Interchange Format (DIF)

ISO HTML

International Organization for Standardization (ISO) 19115:2003 Geographic Information Metadata