Data Set ID: 

Active-Layer Depth of a Finnish Palsa Bog, Version 1

This data set contains 76 active-layer depth measurements (cm) of the Vaisjeäggi palsa bog, Finland, from 08 September 1993 to 14 October 2002. Data were collected from a single location at 69 deg 49'16.6' N, 27 deg 10'17.1' E. Data also contain snow depth (cm) when snow cover was present. Data are in tab-delimited ASCII text format, and are available via ftp.

This is the most recent version of these data.

  • Frozen Ground > Active Layer
Data Format(s):
  • ASCII Text
Spatial Coverage:
N: 69.82, 
S: 69.82, 
E: 27.17, 
W: 27.17
Spatial Resolution:Not SpecifiedSensor(s):SOIL DEPTH PROBE
Temporal Coverage:
  • 8 September 1993 to 14 October 2002
Temporal ResolutionNot specifiedMetadata XML:View Metadata Record
Data Contributor(s):Maria Ronkko

Geographic Coverage

Would you like to receive updates and notifications regarding this data set? Subscribe below and stay informed. PLEASE NOTE: You only need to fill this form out once.

FTP data can be downloaded through a Web browser or command line via FTP. For help downloading data through an FTP client, go to the How to access data using an FTP client support page.

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.

M. Ronkko 2003. Active-Layer Depth of a Finnish Palsa Bog, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: [Date Accessed].

Back to Top

Collapse All / Open All

Detailed Data Description


Data are in tab-delimeted ASCII text format.

Background color on
File Naming Convention


Background color on
File Size

The file "ggd622_vaisjeaggi_ald.txt" is 2 KB.

Background color on
Spatial Coverage

Samples were collected at Vaisjeäggi palsa bog in Finland, 300 m above sea level, at 69°49'16.6" N, 27°10'17.1" E. Soil consisted primarily of peat.

Background color on
Temporal Coverage

Rönkkö collected measurements once each year during 1993, 1994, 1995, and 1998. Coverage then extends from June to November 2001, and from March to Oct 2002. Dates are given in format.

Background color on
Parameter or Variable

Active-layer depth at a palsa bog, using a 1-m metal rod that was pushed vertically to the peat until resistance was met. Active-layer depth values range from 5 cm to 67 cm. Snow depth was measured when snow cover was present.

Palsa is a peaty permafrost mound possessing a core of alternating layers of segregated ice and peat or mineral soil material. They are typically between 1 m and 7 m in height and a few metres to 100 m in diameter. Most, but not all, palsas occur in the discontinuous permafrost zone. See the Frozen Ground Glossary for more information.

Background color on

Software and Tools

Background color on

Data Acquisition and Processing

Background color on

Contacts and Acknowledgments

Maria Rönkkö
Laboratory of Physical Geography, P.O. Box 64
University of Helsinki 00014

Document Information

Document Creation Date:

February 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