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Va-1 Vaisjeaggi1*

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General Information

Created: 2014-01-20 10:47:06
Modified: 2015-11-25 16:32:42

Active: Yes
Country:Finland
Site:Vaisjeaggi
GTN-P:FN 01
Responsible Countries: Finland,
Timezone:UTC/GMT +02:00 hours
Vegetation Type:Forest Tundra
Responsible Person:Jan Hjort
MAGT (C) -0,2
MAGT_DEPTH (m) 3,3
MAGT_DATE 2009

MEAN ANNUAL GROUND TEMPERATURE AT OR NEAR DEPTH OF ZERO ANNUAL AMPLITUDE (°C) – report  value for most recent year or 12 month interval

Range (if applicable) of mean annual ground temperature over observation period (°C) (0.5 m = active layer) 1.0 m – 3.3. m = 0.42°C

 

AIR TEMPERATURE AND SNOW COVER THICKNESS/DENSITY MEASUREMENTS AT THE BOREHOLE SITE (indicate frequency of observations):

Air temperature: Yes [X] No [ ]    Snow thickness: Yes [ ] No [X]   Density: Yes [ ] No [X]

 

NAME AND LOCATION OF CLOSEST CLIMATE STATION (latitude, longitude, and distance from borehole, km) – provide (if available) mean monthly air temperature and snow depth of reporting interval for mean annual ground temperature

Kevo Meteorological Station (69°45’N, 27°01’E; 107 m a.s.l.); 10 km

Depth:3.3 m
Drilling Angle:90 °
Drilling Method:Portable drilling machine (Geo, Professional Hand Boring, K. S. R., Geo Service)
Date Drilled:01. Jan 2008
Type:road
Distance From Road:500 m
Type:river
Distance From Heat:100 m
Slope:2 °
Aspect:313.9 °
Permafrost Thickness:>3 m
Permafrost Zone:Sporadic
Landform:Mature stage palsa hummock with surface cracks, height = ca. 2.5; Deglaciation of the valley occurred at about 9900 yr BP; Mire initiation recorded at four studied sites took place between 8240 and 5210 yr BP; First permafrost aggradation = ca. 2460 yr BP (Oksanen, 2006).
Lithology:Precambrian peneplain, (granite) gneiss bedrock, sandy ablation tills and small occurrences of glaciofluvial deposits, no permafrost in mineral soil in valley (only below palsas).
Morphology:Not measured, relatively flat (on top of palsa). Valley.
Access Timeseries
Bibliographic References
Nykänen, H., Heikkinen, J.E.P., Pirinen, L., Tiilikainen, K. Martikainen, P. J., 2003. Annual CO2 exchange and CH4 fluxes on a subarctic palsa mire during climatically different years. Global Biogeochemical Cycles 17: 1-18.
Seppälä, M., 1982. An experimental study of the formation of the palsas. In: French, H.M. (ed.). 4th Canadian Permafrost Conference, Proceedings, 3642. National Research Council of Canada, Ottawa.
Seppälä, M., 1995. How to make a palsa: a field experiment on formation of permafrost. Zeitschrift für Geomorphologie, Supplement-Band, 99: 9196.
Seppälä M., 2003. An experimental climate change study of the effect of increasing snow cover on active layer of a palsa, Finnish Lappland. In: PhillipsM., Springman, S.M. Arenson, L.U. Permafrost, Eight international conference, Proceedings, 10131016. A.A. Balkema Publishers, Lisse.
Seppälä, M., 1994. Snow depth controls palsa growth. Permafrost and Periglacial Processes, 5: 283288.
Oksanen, P.O., 2006. Holocene development of the Vaisjeäggi palsa mire, Finnish Lapland. Boreas 35, 8195.
Seppälä, M., 1990. Depth of snow and frost on a palsa mire, Finnish Lapland. Geografiska Annaler, 72A: 191201.

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Map

Longitude:27.1671 °
Latitude:69.8219 °
Elevation:291 m
EPSG:4326
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