Get Data

DOWNLOADING DATA VIA FTP

Data can be downloaded through a Web browser or command line via FTP. When using a Web browser, the FTP link first directs you to an Optional Registration Form that if filled out, will allow you to receive notifications about updates or processing changes related to that specific data set. After completing the Optional Registration Form, the FTP directory becomes available. For additional help downloading data through an FTP client, go to the How to access data using an FTP client support page.

FTP

Data Set ID:
GGD273

Soil temperatures from Disko Island (Qeqertarsuaq/Godhavn), Greenland, Version 1

A meteorological station at 69 deg 15'N, 53 deg 34'W, Godhavn village, Greenland, measured air temperatures at 6 m above the ground, and soil temperatures (deg C) at 0.05 m, 0.6 m, 1.75 m, and 3 m below the surface. The station automatically measured data every half hour. Data extend from 01 January 1991 to 16 November 2002. Data are in tab-delimited ASCII text format and are available via FTP.

Geographic Coverage

Parameter(s):
  • Frozen Ground > Soil Temperature
  • Soils > Soil Temperature
  • Atmospheric Temperature > Surface Air Temperature
Spatial Coverage:
  • N: 69.15, S: 69.15, E: -53.34, W: -53.34

Spatial Resolution: Not Specified
Temporal Coverage:
  • 1 January 1991 to 31 December 2002
Temporal Resolution: Not specified
Data Format(s):
  • ASCII Text
Platform(s) Not specified
Sensor(s): Not specified
Version: V1
Data Contributor(s): Hanne Christiansen, Niels Nielsen, Birger Ulf Hansen, Ole Humlum
Data Citation

As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Nielsen, N., Humlum, O., and B.U. Hansen 2003. Soil temperatures from Disko Island (Qeqertarsuaq/Godhavn), Greenland, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. [Date Accessed].

Back to Top

Collapse All / Open All

Detailed Data Description

Format

Data are in tab-delimited ASCII text format.

Background color on
File Naming Convention

"ggd273_soiltmpdisko91_96.txt":  1991-1996 data
"ggd273_soiltmpdisko97_02.txt":  1997-2002 data

Background color on
File Size

Both files are approximately 6.2 MB.

Background color on
Spatial Coverage

Air and soil temperatures were taken from a meteorological station at 69°15'N, 53°34'W, 20 m above sea level, in the eastern part of Godhavn village, central-west Greenland. This station is located 100 m northwest of the University of Copenhagen's Arctic station. Continuous permafrost underlies the site.

Sediments deposited during the Early Holocene marine regression are fairly uniform from the ground surface to the permafrost surface. The terrain surface is nearly flat at the meteorological station, and is covered by a low, dwarf-shrub heath vegetation. The area around the station is usually covered by snow from mid-September to early June. Snow depth is typically 10 cm to 30 cm, and rarely exceeds 50 cm because of persistent snow drift.

The typical maximum thickness of sandy sediments is 180 cm in late September. The soil begins to freeze in late September to early October. After the soil remains frozen for several months, it begins to thaw quickly in late May to early June when melt water infiltrates the surface.

Spatial Resolution:

Data were collected at a single point, 69°15'N, 53°34'W.

Background color on
Temporal Coverage

Data extend from 01 January 1991 through 16 November 2002.

Temporal Resolution:

Meteorological instruments automatically measure air and ground temperatures every half hour.

Background color on
Parameter or Variable

Parameter Description:

This data set provides air temperatures at 6 m above the ground and soil temperatures at 0.05 m, 0.6 m, 1.75 m, and 3 m below the ground.

Sample Data Record:

Following are the first five lines of "ggd273_soiltmpdisko97_02.txt."


Year	Month	Date	Time(min)	AirTemperature(600cm)(C)	TempSed(-5cm)(C)	TempSed(-60cm)(C)	TempSed(-175cm)(C)	TempRock(-300cm)(C)
1997	1	1	0	4.00134		-1.924058	0.03617344	0.007425664	-2.098685
1997	1	1	30	3.543081	-1.924058	0.03617344	0.007425664	-2.098685
1997	1	1	60	4.368266	-1.924058	0.03617344	0.007425664	-2.098685
Background color on

Software and Tools

Background color on

Data Acquisition and Processing

Data Acquisition Methods

A meteorological station recorded air temperatures at 6 m above the ground and soil temperatures (°C) at 0.05 m, 0.6 m, 1.75 m, and 3 m below the surface. The thermistors can meausure soil temperatures from -44°C to 49°C with a resolution of 0.1°C. The thermistors were installed in the vertical, undisturbed sides of a pit dug into sandy littoral sediments, until the thermistors reached 1.75 m. The thermistors encountered rock at 3 m below the surface.

After initally installing the thermistors, the researchers tested the instruments for several weeks to allow thermal disturbance to subside and to fix minor technical problems.

Background color on

References and Related Publications

Contacts and Acknowledgments

Niels Nielsen, Ole Humlum, and Birger Ulf Hansen
Institute of Geography
University of Copenhagen
Øster Voldgade 10
Copenhagen, Denmark, DK 1350

Document Information

Document Creation Date:

March 2003

No technical references available for this data set.
No FAQs or How Tos available for this data set.

Access complete Knowledge Base

Questions? Please contact:
NSIDC User Services
Phone: 1 303 492-6199
Email: nsidc@nsidc.org