|
CALM SITE R24 |
BOLVANSKY |
|
Site code |
R24 |
|
Site name |
Bolvansky |
|
CAPS I Metadata form |
|
|
CAPS II Metadata form |
GGD313_R24 |
|
Responsible for data submission |
Galina
Malkova |
|
Email Address |
galina_malk”-at-“mail.ru |
|
Institution/Organization |
Earth
Cryosphere Institute SB RAS |
|
Location description |
European
North of Russia |
|
Location Lat. |
68 deg. 18
min. N |
|
Location Lon. |
54 deg. 30
min. E |
|
Elevation avg. (m) |
28 |
|
Methods Grid |
100 |
|
Methods Other |
Air and Soil Temperature |
|
Landscape Description |
Glacial
marine plain dissected by lakes and streams |
|
Vegetation /Classification |
Mesic dwarf
shrub-lichen-moss tundra with frost boils |
|
Soils (or Material) |
Turbi-Histic
(Gleyic) and Gleyi-Turbic Cambisol (stony loam) |
|
Thaw depth measurements (year started)
|
1999 |
|
Air temp. measurements (year started) |
1999 |
|
Snow cover measurements (year started) |
|
|
soil temp. measurements (year started) |
1999 |
|
soil moisture measurements (year started) |
1999 |
|
general description of soil moisture (dry, moist, wet,
saturated) |
wet |
|
soil texture: if non organic describe texture, if organic
indicate thickness of organic layer (cm) |
loam |
|
SITE DESCRIPTION The Bolvansky CALM
site (68 17.30N; 54 30.00E) is located in the Pechora River Delta, on the
northernmost extremity of Cape Bolvansky, which juts into the Pechora Inlet.
The Bolvansky weather station operated on the Cape from 1935 to 1997.
Long-term MAAT is 4.4 C and mean annual precipitation is 404 mm. The Cape is
an undulating plain with numerous lake depressions and large flat-bottom
valleys, some of them with permanent creeks. Elevations range from 20 to 35m
a.s.l. The surficial material is a boulder sandy loam of Quaternary age
exceeding 100m in thickness. Depressions are occupied by polygonal peatlands
and fens with peat thickness ranging from 0.5 to 5m. The area is
geocryologically unstable due to its position at the western extremity of the
continuous permafrost zone. Permafrost develops under convex and flat
surfaces, whereas the permafrost table is deeper in valleys, both dry and
drained by streams. Data from numerous boreholes show that open taliks occur
under the Pechora valley and beneath many lakes (Ershov, 1988). The Bolvansky
grid contains 121 sampling nodes and occupies the top of a hill with gentle
slopes.Dwarf shrub/lichen tundra with tundra circles (frost boils) occupies
the site. The site contains three boreholes. Permafrost temperature at the
depth of zero annual temperature amplitude (10 to 12 m) is 2.1 C. in a
borehole located in the central and highest point of the site. The range of
elevations within the site is 5m. Organic (peaty) soil layer thickness
reaches 22 cm at some grid nodes, whereas the site average is only 5 cm.
Lower soil horizons are developed in gravelly sandy loam. Volumetric water
content of the loam ranges mostly from 30 to 40%; generally, the thicker an
organic layer, the higher the water content (Mazhitova et al., 2004). SOIL DESCRIPTION:
(predominant texture, i.e., ‘sand’, ‘gravel’,
‘peat’, etc.): Turbi-Histic
(Gleyic) and Gleyi-Turbic Cambisol (stony loam) |
|
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 and snow sampling was conducted
twice by manual probing at each stake. The two values for each sampling point
are averaged, yielding a maximum of 121 data points per grid per probing date.
The active layer was not measured at locations where grid points intersect
rocks or deep water.
REFERENCES:
Malkova
G.V. 2006. Subsurface
ground temperature in the Russian cryolithozone and recent climatic warming. Global Environmental Change:
Regional Challenges, 9-12 nov. 2006, - Beijing, China - Beijing International
Convention Center. Parallel session 5 "From Climate Research to Risk
Management", P. 33. http://www.essp.org/ESSP2006/ParallelSessions.htm
Malkova-Ananjeva
G.V. 2005. Frozen
ground response to recent climate changes
in the European North. EUCOP II, 2nd European
conference on permafrost, Potsdam, Germany, 12-16 June 2005. p.137.
Mazhitova
G., Malkova (Ananjeva)
G., Chestnykh O., Zamolodchikov D.
2004. Active-layer spatial and temporal variability at European Russian
Circumpolar-Active-Layer-Monitoring (CALM) sites. Permafrost and Periglacial
Processes,15. P. 123–139.
Pavlov
A.V., Malkova-Ananjeva G.V. 2005.
Climate and Cryolitozone Changes within Russian Oil and Gas Provinces. I
CliC International Science Conference/ 11-15 April, Beijin, China. 2005, p. 178