Borehole locations and permafrost depths, Alaska, USA

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Identification Information:

Dataset Identifier:

GGD223

Citation:

Citation Information:

Originator: Clow, G.D
Publication Date: 19980101
Title: Borehole locations and permafrost depths, Alaska, USA
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC: National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/ggd223.html

Description:

Abstract:

The methods utilized by the U.S. Geological Survey to measure subsurface temperatures have evolved considerably over the years. Although some of the early measurements were obtained using thermistor strings frozen into permafrost, the vast majority of the measurements were made in fluid-filled holes using a custom temperature sensor. A typical sensor used in Alaska prior to 1989 consisted of a series-parallel network of 20 thermistors; see Sass et al. [1971] for a more detailed description. During a logging experiment, the resistance of the thermistor network was determined using a Wheatstone bridge prior to 1967. After that time, a 4-wire resistance measurement was made using a commercial 5.5-digit multimeter (DMM). Before 1984, boreholes were logged in the 'incremental' or 'stop-and-go' modes; the vertical spacing of the measurements was typically 3-15 m. Beginning in 1984, the depth/resistance measurements were automatically stored on magnetic tape, allowing boreholes to be logged in the 'continuous' mode; the typical data spacing for the continuous temperature logs was 0.3 m (1 ft). Many of the Alaskan boreholes were re-logged several times to quantify the thermal disturbance caused by drilling the holes (see Lachenbruch and Brewer [1959]). A review of current temperature measuring techniques used by the USGS in the polar regions is given by Clow et al. [1996]. Data from 1950-1989 are included on the CAPS CD-ROM Version 1.0, June 1998.

Purpose: scientific research

Documentation:

User's Guide:

Citation Information:

Originator: Clow, G.D
Publication Date: 19980101
Title: Borehole locations and permafrost depths, Alaska, USA
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC: National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/docs/fgdc/ggd223_boreholes_alaska/index.html

Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 19500101
Ending Date: 19891231

Currentness Reference: publication date

Status:

Progress: Complete
Maintenance and Update Frequency: Unknown

Spatial Domain:

Bounding Coordinates:

 

West Bounding Coordinate: -165.767°
East Bounding Coordinate: -141.15°
North Bounding Coordinate: 71.189°
South Bounding Coordinate: 62.19°

Keywords:

Theme:

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

Theme:

Theme Keyword Thesaurus: None
Theme Keyword:

Theme:

Theme Keyword Thesaurus: None
Theme Keyword: Boreholes
Theme Keyword: Permafrost Properties
Theme Keyword: Permafrost Temperature
Theme Keyword: Thermal Properties

Place:

Place Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Location Keywords
Place Keyword: Continent North America United States Of America Arctic Alaska, USA

Access Constraints:

None

Use Constraints:

None

Point of Contact:

Contact Information:

Contact Person Primary:

Contact Person: Gary D. Clow
Contact Organization: US Geological Survey

Contact Address:

Address Type: mailing
Address:
  • Denver Federal Center, Box 25046, MS980
City: Denver
State or Province: CO
Postal Code: 80225
Country: USA

Contact Voice Telephone: 1 303 236-5509
Contact Facsimile Telephone: 1 303 236-5349
Contact Electronic Mail Address: clow@usgs.gov

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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:

GGD223

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:

20130307

Metadata Review Date:

20130307

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