CALM SITE R53	HARP
Site code	R53
Site name	Harp
CAPS I Metadata form
CAPS II Metadata form
Site Photograph
Responsible for data submission	Yaroslav Kamnev
Email Address	KamnevYK- at- gmail.com
Institution/Organization	Arctic Research Center of the Yamal-Nenets autonomous distric, Salekhard, Russia
Location description	foothills of the Polar Ural in the north of Western Siberia
Location Lat.	66.723483^o N
Location Lon.	66.080488^o E
Elevation avg. (m)	111
Methods Grid	100
Methods Other
Landscape Description	Coastal-marine terrace
Vegetation /Classification	Low-shrub tundra
Soils (or Material)	Loam
Thaw depth measurements (year started)	2016
Air temp. measurements (year started)
Snow cover measurements (year started)
soil temp. measurements (year started)
soil moisture measurements (year started)
general description of soil moisture (dry, moist, wet, saturated)
soil texture: if non organic describe texture, if organic indicate thickness of organic layer (cm)	Loam
SITE DESCRIPTION Harp grid (R53) is located (66.723483^o N, 66.080488^o E) in the north of Western Siberia, about 25 km east of the Polar Ural near settlement Harp. The site is situated on a coastal-marine terrace, characterized by loamy soils and underlined by low-temperature, continuous permafrost. The climate of the region is subarctic with prolong and snowy winters and short cool summers. On average the period with negative mean daily air temperatures is 265 days. Mean annual air temperature is -7.1^оС. Mean air temperature of the coldest month (January) is -24^оС, of the warmest month (July) is +14.1^oC. Average annual wind speed is 4 m/s and annual sum of precipitation is 414 mm/yr. The climatologically average maximum snow-cover thickness is 110 cm. It has micro relief of various genesis and complicated landscape structure, described below: 1. Relatively elevated wet areas (because of thick peat-moss cover), with hummocks, bushes up to 20-30 cm, dwarf birch (Betula Nana), Labrador tea (Ledum Polustre), an abundance of cloudberry (Rubus Chamoemorus), sedge (Carex Sp.), sphagnum moss. Shrub-moss-peat hummocky tundra. 2. Spotted-medallion microrelief with overgrowing ground spots and rollers, transformed into hummock, moderate humidity. Within spots - outputs debris. Dwarf birch (Betula Nana), a willow sp. (Salix), blueberries (Vaccinium ueiginosum), cranberries (Vaccinium Vitis), sedges (Carex Sp.), relatively thin moss layer, fragmentary lichen (Cetaria Islandica). Spotted-medallion relatively drained shrubby-sedge tundra. 3. Hummocky microrelief, some hummocks up to 40-50 cm. Overgrowning spot-medallions, watered hollow. Dwarf birch (Betula Nana), Labrador tea (Ledum Polustre), cloudberry (Rubus Chamoemorus), sedges (Carex Sp.). Hummocky shrubby-moss tundra. 4. Waterlogged land (thermokarst subsidence) with small puddles, from 0.6-0.8m. up to 1-1.5 m deep, overgrown with sedges, cotton grass and mosses (eutrophic wetland). Sedge (Carex Sp.), Cotton grass (Poa Sp.), Sphagnum moss (Sphagnum). Wet sedge -cotton grass-moss tundra within thermokarst subsidence. 5. Hummocky surface, relatively well-drained. Dwarf birch (Betula nana), Labrador tea (Ledum polustre), blueberries (Vaccinium ueiginosum), sedge (Carex Sp.), with thick moss - peat cover. Hummocky-shrub-sedge-moss tundra. 6. Spotted-medallion sufficiently drained terrain. Large amount of rock debris occurs within overgrown ground spots: gravel, pebbles and large boulders (30-35 cm). Dwarf birch (Betula nana), a beautiful willow (of Salix), sedge (Kalix Sp.), moss (thin layer), moss fragments (Cetaria Islandica). Spotted-medallion-drained-shrub-sedge-moss tundra. Landscape types present on the site are shown on the map (fig. 1). SOIL DESCRIPTION: (predominant texture, i.e., ‘sand’, ‘gravel’, ‘peat’, etc.): Sediments primarily consist of loam with small intrusions of pebbles and overplayed by a thin peat layer. 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: Kamnev Y., Sinitstkii A., Grebenets V., Petrov B., Creating new calm site near to town harp // Scientific Bulletin of Yamal-Nenets autonomous district №4(93) / Salekhard, 2008, p. 25-29. DATA Site photo1 Site photo2 Site photo3 Data Access