On Monday, 11 July from 3:00 p.m. through Wednesday, 13 July until 5:00 p.m. (USA Mountain Time), NSIDC data distribution, services, and Web site will be unavailable to accommodate a major upgrade to our data center. We apologize for any inconvenience this may cause you. Need to talk to us? You can always contact our friendly User Services Office at firstname.lastname@example.org or + 1 303.492.6199.
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.
Racine, C., T. Jorgenson, and J. Walters. 2003. Annual Thaw Depths and Water Depths in Tanana Flats, Alaska. Boulder, CO: National Snow and Ice Data Center. Digital Media.
|Data format||Data are in tab-delimited ASCII text format.|
|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.|
|Temporal coverage||Data were collected once a year in August of 1995, 1996, 1997, 2000, and 2002.|
|File naming convention||ggd623_thawdepth_tanana.txt|
|File size||The file "ggd623_thawdepth_tanana.txt" is 2.67 KB.|
|Parameter(s)||Thaw Depth (cm) and water depth (cm)|
|Procedures for obtaining data||Data are available via FTP.|
Dr. Charles Racine
Cold Regions Research and Engineering Laboratory (CRREL)
72 Lyme Rd
Hanover, NH 03755, USA
Torre M. Jorgenson
P.O. Box 80410
Fairbanks, AK 99708
James H. Walters
Department of Earth Science
University of Northern Iowa
Cedar Falls, IA 50614-0335
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
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."
The file "ggd623_thawdepth_tanana.txt" is 2.67 KB.
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.
Data were collected once a year in August of 1995, 1996, 1997, 2000, and 2002.
Thaw depth (cm) was measured each August in 1995, 1996, 1997, 2000, and 2002. Water depth (cm) was measured in August 2000 and 2002.
Jorgenson, T., C. Racine, J. Walters, and T. Osterkamp. 2001. Permafrost degradation and ecological changes associated with a warming climate in central Alaska. Climatic Change 48:551-579.
Osterkamp, T.E., L. Viereck, Y. Shur, M. Jorgenson, C. Racine, A. Doyle, and R. Boone. 2000. Observations of thermokarst and its impact on boreal forests in Alaska, USA. Arctic, Antarctic and Alpine Research 32:303-315.