SKT - AsiaFlux

SKT:Southern Khentei Taiga

General site detail (updated 4 April 2007)

Site name	Southern Khentei Taiga
AsiaFlux site code	SKT
Location	25km NE of Mongonomorit, Mongolia
Position	48º 21' 6.7" N, 108º 39'15.6" E (World Geodetic System 1984)
Elevation	1630 m above sea level (World Geodetic System 1984)
Slope	5 degree to the west
Terrain type	flat top of a hill
Area	-
Fetch	750-800 m
Climate	cold and semi-arid (snow - winter dry - cool summer [Dwc] (Kottek et al. 2006))
Mean annual air temperature	-2.9 ºC
Mean annual precipitation	282 mm ( at Mongenmoryt station)
Vegetation type	larch forest
Domestic species (Overstory)	Larix sibirica, Batula platyphylla
Dominant species (Understory)	Carex Spp., Koeleria spp., Chamaenerion angustifolium
Canopy height	20 m
Age	70-150 years
LAI	Max. 2.2-2.7
Soil type	spodosol (seasonal cryosol)

Observations
Eddy Covariance method (CO₂)

System	Open-path system (CO₂ flux, latent heat flux)
Wind speed	Kaijo SAT-540
Air temperature	Kaijo SAT-540
Water vapor	Open path(LI-7500, Li-Cor, USA)
CO₂	Open path(LI-7500, Li-Cor, USA)
Measurement height	30 m above the ground
Sampling frequency	10 Hz
Averaging time	30 min
Data logger	CR-23x (Campbell, USA)
Data storage	CR-23x (Campbell, USA)
Original data	statistics only

Meteorology

Observation items	Levels/ Depth	Instrument
Global solar radiation(incoming)	29 m	Four-component net radiometer,CNR1 ( Kipp & Zonen )
Global solar radiation (outgoing)	29 m	Four-component net radiometer,CNR1 ( Kipp & Zonen )
Long-wave radiation(incoming)	29 m	Four-component net radiometer,CNR1 ( Kipp & Zonen )
Long-wave radiation(outgoing)	29 m	Four-component net radiometer,CNR1 ( Kipp & Zonen )
Net radiation	-
PPFD (incoming)	-
PPFD (outgoing)	-
Direct / diffuse radiation	-
Direct / diffuse PPFD	-
Air temperature	30 m	HMP-45D, Vaisala Inc
Humidity	30 m	HMP-45D, Vaisala Inc
Soil temperature	-0.05, -0.1, -0.2, -0.3, -0.5, -0.7, -1 m	C-PT, CLIMATEC Inc
Soil heat flux	-0.05, -0.1m	PHF-1.1, REBS, Inc
Soil water content	-0.1, -0.2, -0.3, -0.7, -1 m	CS616, Campbell Scientific
Wind speed	-
Wind direction	-
Barometric pressure	-	Campbell PTB210
Precipitation	-	CYG-52202, RM Young Company
CO₂concentration	-
H₂O concentration	-

Other

Soil respiration	-
Photosynthesis	-
Ecological investigation	-

Observation Period and Data Availability

Measurement Period	from March 2003 to present
Measurement Frequency	Continuous
Data Availability	2003-2006 in AsiaFlux Database

Contact

Jun Asanuma (asanuma [at]suiri.tsukuba.ac.jp)
Terrestrial Environment Research CenterUniversity of Tsukuba Tsukuba, Ibaraki 305-8577, Japan
Tel:+81-298-53-6704 Fax:+ 81-298-53-6704

Sheng-Gong Li (lisg [at] igsnrr.ac.cn)
Synthesis Research Center of Chinese Ecosystem Research Network (CERN)Institute of Geographic Sciences and Natural Resources Research (IGSNRR),Chinese Academy of Sciences (CAS),
DaTun Road A11, Anwai Street , ChaoYang DistrictBeijing, China PR, 100101
Tel: +86-10-64889039

Gombo Davaa (watersecta [at] yahoo.com)
Institute of Meteorology and HydrologyHudaldannyi St.-5,
Ulaanbaatar 46, Mongolia
+976-11-312765+976-11-326611

Calibration Information

Calibration once a year.

Infrastructure

Tower

Research Fund

The rangelands atmosphere-hydrosphere-biosphere interaction study experiment in north-eastern Asia (RAISE) project through financial support from Japan Science and Technology Agency (2003-2006)

Publications

Sugita, M., Asanuma, J., Tsujimura, M., Mariko, S., Lu, M., Kimura, F.,Azzaya, D., and Adyasuren, T., 2007: An overview of the rangelands atmosphere-hydrosphere-biosphere interaction study experiment in northeastern asia (RAISE). Journal of Hydrology, Vol. 333, pp. 3-20.

S.-G. Li, J.Asanuma, A.Kotani, W.Eugster, G.Davaa, D.Oyunbaatar， M.Sugita(2005):Year-round measurements of net ecosystem CO2 flux over a montane larch forest in Mongolia,Journal of Geographic Research-Atmosphere,110, D09303, doi:10.1029/2004JD005453