CALM SITE R47

CHARA MOST

Site code

R47

Site name

Chara Most

CAPS I Metadata form

NA

CAPS II Metadata form

NA

Site Photograph

Responsible for data submission

Aleksyutina Daria, Gergesova Julia, Bolotyuk Mikhail, Sergeev Dmitry

Email Address

aleksyutina-at-gmail.com; sergueevdo-at-mail.ru

Institution/Organization

Moscow State University;

Institute of Environmental Geoscience RAS,

Location description

Verhne-Charsky basin, north of the Chita region

Location Lat.

56.906264 (for site center)

Location Lon.

118.280672 (for site center)

Elevation avg. (m)

705

Methods Grid

100

Methods Other

Soil temperature, Soil Moisture, Soil density

Landscape Description

Plain of first terrace

Vegetation /Classification

Hummocky tundra and hummocky mire (sedge is dominated)

Soils (or Material)

Sandy silt and peat overlaid by sands

Thaw depth measurements (year started)               

2013

Air temp. measurements (year started)

2007

Snow cover measurements (year started)

 

soil temp. measurements (year started)

1987

soil moisture measurements (year started)

2009

general description of soil moisture (dry, moist, wet, saturated)

Saturated

soil texture: if non organic describe texture, if organic indicate thickness of organic layer (cm)

Up to 40 cm

 SITE DESCRIPTION

Active layer monitoring at the Chara Most CALM grid was initiated in 2013. Studied area is located in the east from Chara downtown, north of the Chita region, East Siberia. CALM site is situated on the fluvial plain with elevation ranging from 705 to 706 m above sea level. Permafrost has a wide distribution on this area. Surface of study area has very poorly drained. There are two dominant site vegetation types are hummocky tundra and hummocky mire. A hummock height varies from 7 to 40 cm. The measurements of the active layer thickness were made between the hummocks. Obtained data show that the smallest values (0.38m) of seasonal thaw depths are observed under sedge-moss cover near tree. The highest values (up to 0.8m) of active layer thickness occurred under sedge cover (perhaps under old dirt road). In this year average thaw depth was 0.55 m.

 

 

SOIL DESCRIPTION: (predominant texture, i.e., ‘sand’, ‘gravel’, ‘peat’, etc.): Geological section is composed by sandy silt and peat overlaid by sands with gravel. In previous year moisture (water mass to mass of dry soil)  and density of these soils were studied in laboratory. The water content of peat varies from 250 to 300 % and density varies from 0.7 to 1.3 g/cm3. The moisture of sandy silt ranges from 35 to 60%.

 

SAMPLING DESIGN AND METHOD:

1-ha grid consists of a square array of permanent stakes separated by 10 m, yielding an 11 × 11 array of sampling nodes on each grid. Thawed depth measurements were conducted at least 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.

 

DATA

 

Site Photos

Data Access