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Rock glaciers, Central Andes, Argentina

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Identification Information:

Dataset Identifier:

GGD280

Citation:

Citation Information:

Originator: Trombotto, D. and E. Buk
Publication Date: 19980101
Title: Rock glaciers, Central Andes, Argentina
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC: National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/ggd280.html

Description:

Abstract:

Primary rock glaciers are fed by avalanche chutes. At the El Salto rock glacier, surveys have been undertaken in order to determine the creep rate. Between 1981 and 1986 temperatures at elevations between 3500 and 3600 m were measured in the active layer to a depth of 1 m with a multipoint temperature recorder (Grant). On the basis of these measurement Buk (1983) determined that the permafrost table was at a depth of about 3 m and the base of the permafrost at 68 m. Similar conclusions were reached by Barsch and King (1989). As an illustration of the importance of avalanches to these forms, the base camp there was destroyed by an avalanche in November 1983.

The surface of the basin of Morenas Coloradas is 54 square km, of which 10.4 square km is seasonally frozen ground. The remaining 60% of the surface is typically periglacial with rock glaciers as the most important forms. In the glacigenic rock glacier, the clean glacier ice ends in detritus-covered or morainic tongues which result in glacigenic ice being incorporated within the substrate. In this way, ice persists at lower altitudes and under very arid conditions (Lliboutry, 1986; Garleff and Stingl, 1986; Schrott, 1992). Interconnected rock glaciers are generated which undergo different phases of activity not always in agreement with those expected as a resulted of their elevations. That is, they continue to show signs of activity not only at the height of the present 0 degrees C air isotherm, but at lower elevations. In the last step downwards towards the valleys these rock glaciers become inactive, and finally morphologically relict or fossil rock glaciers are found. Meteorological, hydrological and geophysical measurements as well as 5 drillings to a depth of 5 m have been carried out in Morenas Coloradas. At an elevation of 3560 m the temperature oscillates around 0 degrees C (with a maximum variation of 0.5 degrees C) at depths between 4 and 5 m. The annual precipitation (1991-93) is 630 mm and the mean annual temperature is 1.6 degrees C. Using a calculated lapse rate of 0.52 degrees C per 100 m, the 0 degrees C isotherm occurs at approximately 3860 m, which represents a considerable rise in comparison with earlier years. It is assumed that this value is strongly influenced by climate warming in the 1980s and 1990s. Temperatures measured at different depths in Morenas Coloradas at 3560 m are positively correlated with the discharge of Rio Vallecitos (correlation coefficients of 0.8-0.9; significance p=0.01). There is no correlation with snowfall data, however, because of the influence of the 'zonda', a very dry and warm wind (up to 100 km/h) which impedes the accumulation of snow. Between 1978 and 1979, the zonda was active for more than 1000 hours. Discharge from the basin is of good quality and averages 505 l/s with a range from 230 l/s (early spring) to >1000 l/s (summer). In comparison, Schrott (1994) calculated the discharge of a rock glacier in the arid region of San Juan, Argentina to be only 5-8 l/s. These data are presented on the CAPS Version 1.0 CD-ROM, June 1998.

Purpose: scientific research

Documentation:

User's Guide:

Citation Information:

Originator: Trombotto, D. and E. Buk
Publication Date: 19980101
Title: Rock glaciers, Central Andes, Argentina
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC: National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/docs/fgdc/ggd280_rockglac_argentina/index.html

Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 19800101
Ending Date: 19931231

Currentness Reference: publication date

Status:

Progress: Complete
Maintenance and Update Frequency: Unknown

Spatial Domain:

Bounding Coordinates:

 

West Bounding Coordinate: -69.45°
East Bounding Coordinate: -69.25°
North Bounding Coordinate: -32.9°
South Bounding Coordinate: -32.983°

Keywords:

Theme:

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

Theme:

Theme Keyword Thesaurus: None
Theme Keyword:

Theme:

Theme Keyword Thesaurus: None
Theme Keyword: Active Layer
Theme Keyword: Hydrology
Theme Keyword: Meteorology
Theme Keyword: Periglacial Processes
Theme Keyword: Permafrost Features
Theme Keyword: Permafrost Properties
Theme Keyword: Rock Glaciers

Place:

Place Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Location Keywords
Place Keyword: Continent South America Argentina Central Andes, Morenas Coloradas and El Salto Basin,

Access Constraints:

None

Use Constraints:

None

Point of Contact:

Contact Information:

Contact Person Primary:

Contact Person: Dario Trombotto
Contact Organization: IANIGLA-CRICYT-CONICET, Geocriologia

Contact Address:

Address Type: mailing
Address:
  • Bajada del Cerro s/n, Cassilla de Correo 330
City: Mendoza
State or Province: Unknown
Postal Code: 5500
Country: Argentina

Contact Voice Telephone: 054-61-287029
Contact Facsimile Telephone: 054-061-380370
Contact Electronic Mail Address: dtrombot@lab.cricyt.edu.ar

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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:

GGD280

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.

Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: ASCII Text (.txt)

Digital Transfer Option:

Online Option:

Computer Contact Information:

Network Address:

Network Resource Name: Click here.

Fees: None

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Metadata Reference Information:

Metadata Date:

20120824

Metadata Review Date:

20120824

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

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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