CALM SITE R52 |
SEIDA |
Site code |
R52 |
Site name |
Seida
|
CAPS I Metadata form |
|
CAPS II Metadata form |
|
Site Photograph |
|
Responsible for data submission |
Dmitry Kaverin |
Email Address |
dkav”-at-“mail.ru |
Institution/Organization |
Institute
of Biology, Komi Center RAS, Syktyvkar |
Location description |
European
North of Russia |
Location Lat. |
|
Location Lon. |
|
Elevation avg. (m) |
100 |
Methods Grid |
100 |
Methods Other |
Air Temperature, Soil temperature, Frost heave and Thaw
settlement |
Landscape Description |
peat
plateau |
Vegetation /Classification |
southern shrub tundra |
Soils (or Material) |
Cryic Folic
Histosols and Cryic Fbric
Histosols |
Thaw depth measurements (year started)
|
2012 |
Air temp. measurements (year started) |
2012 |
Snow cover measurements (year started) |
2013 |
soil
temp. measurements (year started) |
2012 |
soil moisture measurements (year started) |
2015 |
general description of soil moisture (dry, moist, wet,
saturated) |
Moist |
soil texture: if non organic describe texture, if organic
indicate thickness of organic layer (cm) |
450 |
SITE
DESCRIPTION
The grid is
located 70 km southeast of the town of Vorkuta, 67 03 56,0 N, 62 55 30,3 E.
Northeast European Russia. Komi Republic. The mean annual air temperature
(MAAT) is -4,2ºC, the sum of positive air temperatures (Thawing Index)
totals 1100 – 1300 ºC/day, mean annual precipitation is 600 mm.
Permafrost is characterized by relatively high negative mean annual
temperatures (MAST) -0 -2ºC, which results in its relative instability
under climate change. Island permafrost subzone. The landscape of study site is
a peat plateau, located in ancient lake bed complicated with thermokarst formations and alluvial terraces. The thickness
of peat deposits varies up to several meters, peat layers are underlain by
Pleistocene lacustrine loams. Study area is located on the boundary between
southern shrub tundra and forest-tundra.
SOIL DESCRIPTION:
(predominant texture, i.e., ‘sand’, ‘gravel’,
‘peat’, etc.): Cryic
Folic Histosols and Cryic Fbric
Histosols on deep peat deposits (up to 5 m)
SAMPLING DESIGN AND METHOD:
1-ha grid consists
of a square array of surveyed permanent stakes separated by 10 m, yielding an
11 × 11 array of sampling nodes on each grid. Thaw depth sampling was
conducted four times by manual probing at each stake. The four values for each
sampling point are averaged, yielding a maximum of 121 data points per grid per
probing date. Ground subsidence and/or heave are determined at Sayda for each grid node annually at the beginning and at
the end of the warm season with the use of a 2H-10KL leveling instrument (Russia)
providing for 4 mm accuracy.
REFERENCES:
D. A. Kaverin,
A. V. Pastukhov, E. M. Lapteva,
C. Biasi, M. Marushchak,
and P. Martikainen. Morphology and Properties of the
Soils of Permafrost Peatlands in the Southeast of the Bol’shezemel’skaya
Tundra // Eurasian Soil Science, 2016, Vol. 49, No. 5, pp. 498–511.