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Data Set ID:
GGD623

Annual Thaw Depths and Water Depths in Tanana Flats, Alaska, Version 1

Thaw depths and water depths were monitored at 1 m to 2 m intervals along a 255-m transect across an area of discontinuous and degrading permafrost on the Tanana Flats south of Fairbanks, Alaska. Measurements were taken once a year in late August from 1995 to 2002 to show effects of winter snow depths, climate warming, and vegetation and wetland creation-surface subsidence. Data are in a single tab-delimited ASCII text file, available via FTP.

Geographic Coverage

Parameter(s):
  • Frozen Ground > Permafrost
  • Snow/Ice > Permafrost
  • Soils > Permafrost
  • Snow/Ice > Permafrost > Thaw Depth
  • Ground Water > Water Table
Spatial Coverage:
  • N: 64.7, S: 64.7, E: -147.9, W: -147.9

Spatial Resolution: Not Specified
Temporal Coverage:
  • 1 August 1995 to 1 August 2002
Temporal Resolution: Not specified
Data Format(s): Not specified
Platform(s) Not specified
Sensor(s): Not specified
Version: V1
Data Contributor(s): Torre Jorgenson, Charles H. Racine, James C. Walters
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.

Racine, C., T. Jorgenson, and J. Walters 2003. Annual Thaw Depths and Water Depths in Tanana Flats, Alaska, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. [Date Accessed].

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Detailed Data Description

Format

The file ggd623_thawdepth_tanana.txt is in tab-delimited ASCII text format. Columns represent distance along the transect (m) from a reference rebar and thaw depth (cm) each August in 1995, 1996, 1997, 2000, and 2002. Water depth (cm) was measured in August 2000 and 2002.

Following is the first three records from ggd623_thawdepth_tanana.txt:

											
DistSept_95	ThawSept_95	DistAug_96	ThawAug_96	DistAug12_97	thawAug12_97	Dist_99	thaw_99	Dist_8_19_00	Thaw8_19_00	WatDepth8_19_00	Dist8_27_02	Thaw8_27_02	WatDep8_27_02
0 138	2	62 5	43	0 225	0	99 0	0	>120 66
5 165	4	47 10	128	2 63	2.5	62 0	2.5	115 45
10 155	6	57 15	75	4 50	5       74 0    5	81 0

If thaw depth was greater than the length of the probe (120 cm), then that record is assigned a value of >120 cm.

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File Naming Convention

ggd623_thawdepth_tanana.txt

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File Size

The file "ggd623_thawdepth_tanana.txt" is 2.67 KB.

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Spatial Coverage

Data were collected in an area of discontinuous and degrading permafrost on the Tanana Flats south of Fairbanks, Alaska. Coordinates are 64.7°N, 147.9°W.

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Temporal Coverage

Data were collected once a year in August of 1995, 1996, 1997, 2000, and 2002.

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Parameter or Variable

Thaw depth (cm) was measured each August in 1995, 1996, 1997, 2000, and 2002. Water depth (cm) was measured in August 2000 and 2002.

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Software and Tools

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Data Acquisition and Processing

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References and Related Publications

Contacts and Acknowledgments

Dr. Charles Racine
Cold Regions Research and Engineering Laboratory (CRREL)
72 Lyme Rd
Hanover, NH  03755, USA

Torre M. Jorgenson
ABR, Inc.
P.O. Box 80410
Fairbanks, AK  99708

James H. Walters
Department of Earth Science
University of Northern Iowa
Cedar Falls, IA 50614-0335

Document Information

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