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

Summary

A meteorological station at 69°15'N, 53°34'W, Godhavn village, Greenland, measured 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 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.

Citing These Data:

Nielsen, N., Humlum, O., and B.U. Hansen. 2003. Soil temperatures from Disko Island (Qeqertarsuaq/Godhavn), Greenland. Boulder, CO: National Snow and Ice Data Center. Digital media.

Overview Table

Category Description
Data format Data are in tab-delimited ASCII text format.
Spatial coverage and resolution Air and soil temperatures were recorded from a meteorological station at 69°15'N, 53°34'W, Godhavn village, central-west Greenland.
Temporal coverage and resolution Data extend from 01 January 1991 through 16 November 2002. Meteorological instruments automatically measure air and ground temperatures every half hour.
File naming convention ggd273_soiltmpdisko91_96.txt
ggd273_soiltmpdisko97_02.txt
File size Both files are approximately 6.2 MB.
Parameter(s) Air temperature (°C) at 6 m
Soil temperatures (°C) at 0.05 m, 0.6 m, 1.75 m, and 3 m below the surface
Procedures for obtaining data Data are available via FTP.

Table of Contents

1. Contacts and Acknowledgments
2. Detailed Data Description
3. Data Access and Tools
4. Data Acquisition and Processing
5. References and Related Publications
6. Document Information

1. Contacts and Acknowledgments:

Investigator(s) Name and Title:

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

Technical Contact:

NSIDC User Services
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder, CO 80309-0449  USA
phone: +1 303.492.6199
fax: +1 303.492.2468
form: Contact NSIDC User Services
e-mail: nsidc@nsidc.org

2. Detailed Data Description:

Format:

Data are in tab-delimited ASCII text format.

File Naming Convention:

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

File Size:

Both files are approximately 6.2 MB.

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.

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.

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

3. Data Access and Tools:

Data Access:

Data are available via FTP.

4. 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.

5. References and Related Publications:

Hansen, B.U., O. Humlum, and N. Nielsen. 2000. Meteorological Observations in 1996 at the Arctic Station, Qeqertarsuaq (69°15'N), Central West Greenland. Danish Journal of Geography 100:85-87.

Hansen, B.U., O. Humlum, N. Nielsen, M. Rasch, and P. Funch. 1997. Meteorological Observations in 1996 at the Arctic Station, Qeqertarsuaq (Godhavn), Central West Greenland. Danish Journal of Geography 97:152-153.

Humlum, O., B.U. Hansen, and N. Nielsen. 2002. Meteorological Observations in 2001 at the Arctic Station, Qeqertarsuaq (69°15'N), Central West Greenland. Danish Journal of Geography 102:103-105.

Humlum, O., N. Nielsen, and B.U. Hansen. 1999. Meteorological Observation in 1998 at the Arctic Station, Qeqertarsuaq (69°15'N), Central West Greenland. Danish Journal of Geography 99:113-115.

Humlum, O., N. Nielsen, M. Rasch, and B.U. Hansen. 1996. Meteorological Observations in 1995 at the Arctic Station, Qeqertarsuaq (Godhavn), Central West Greenland. Danish Journal of Geography 96:119-122.

Nielsen, N., O. Humlum, and B.U. Hansen. 2001. Meteorological Observations in 2000 at the Arctic Station (69°15'N), Central West Greenland. Danish Journal of Geography 101:155-158.

Nielsen, N., O. Humlum, and B.U. Hansen. 1998. Meteorological Observation in 1997 at the Arctic Station, Qeqertarsuaq (69°15'N), Central West Greenland. Danish Journal of Geography 98:81-83.

Nielsen, N., O. Humlum, B.U. Hansen, and M. Rasch. 1995. Meteorological Observations at Arctic Station, Qeqertarsuaq (Godhavn), Central West Greenland. Danish Journal of Geography 95:97-104.

6. Document Information:

Document Creation Date:

March 2003

Document Revision Date:

March 2003

Document Review Date:

March 2003

Document URL:

http://nsidc.org/data/docs/fgdc/ggd273_soiltemp_greenland/index.html