X03: Xilinhot degraded steppe General site detail (Updated 24 July 2007)
Site name
Xilinhot degraded steppe
AsiaFlux site code
X03
Location
Xilinhot, Inner Mongolia, China
Position
116º 40' 17'' E, 43º 33' 16'' N
Elevation
1250 m above sea level
Slope
15-20 deg
Terrain type
Softly sloping plain
Area
About 30 ha
Fetch
200-400 m
Climate
Temperate continental climate
Mean annual air temperature
2 deg C (long term)
Mean annual precipitation
360 mm (long term)
Vegetation type
Degraded steppe
Domestic species (Overstory)
Stipa grandis, Artemisia frigida
Dominant species (Understory)
-
Canopy height
About 0.2 m
Age
-
LAI
0.25 (2006)
Soil type
Chestnut soil
Observations Eddy Covariance method (CO2)
System
Open-path system (CO2 flux, latent heat flux)
Wind speed
Three dimensional sonic anemometer (CSAT3, Campbell scientific)
Air temperature
Three dimensional sonic anemometer (CSAT3, Campbell scientific)
Water vapor
Open-path analyzer (LI-7500, LI-COR, USA)
CO2
Open-path analyzer (LI-7500, LI-COR, USA)
Measurement height
4 m
Sampling frequency
10 Hz
Averaging time
30 min
Data logger
CR5000 (CSI USA)
Data storage
2G CF card for about one month
Original data
Raw data
Meteorology
Observation items
Levels/ Depth
Instrument
Global solar radiation(incoming)
4 m
CNR1 (Kipp & Zonen, The Netherlands)
Global solar radiation (outgoing)
4 m
CNR1 (Kipp & Zonen, The Netherlands)
Long-wave radiation(incoming)
4 m
CNR1 (Kipp & Zonen, The Netherlands)
Long-wave radiation(outgoing)
4 m
CNR1 (Kipp & Zonen, The Netherlands)
Net radiation
4 m
CNR1 (Kipp & Zonen, The Netherlands)
PPFD (incoming)
4 m
Li190SB,Li-Cor Inc., Lincoln, NE, USA
PPFD (outgoing)
-
Direct / diffuse radiation
-
Direct / diffuse PPFD
-
Air temperature
1, 2, 4 m
HMP45C, VAISALA, Finland
Humidity
1, 2, 4 m
HMP45C, VAISALA, Finland
Soil temperature
5, 10, 20 cm
Model 107, Campbell Scientific Inc., Logan, UT, USA
Soil heat flux
2 cm
HFT-3, Campbell Scientific Inc., Logan, UT, USA
Soil water content
0 -10 cm
CS616, Campbell Scientific Inc., Logan, UT, USA
Wind speed
4 m
CSAT-3, Campbell Scientific Inc., Logan, UT, USA
Wind direction
4 m
CSAT-3, Campbell Scientific Inc., Logan, UT, USA
Barometric pressure
-
Precipitation
4 m
TE525, Texas Electronics, Texas, USA
CO2 concentration
4 m
TE525, Texas Electronics, Texas, USA
Other
Soil respiration
-
Photosynthesis
-
Ecological investigation
LAI (Li3000A, Li-COR, USA)
Observation Period and data Availability
Measurement Period
From July 2005 to present
Measurement Frequency
Continuous
Data Availability
N/A
Contact
Shiping Chen (spchen [at] ibcas.ac.cn) Institute of Botany, the Chinese Academy of Sciences20 Nanxincun, Xiangshan, Haidian District, Beijing 100093, P. R. ChinaTel: +86-10- 62836279; Fax: +86-10-62599059
[Vegetation survey] Ping Zhang (zp [at] ibcas.ac.cn) Institute of Botany, the Chinese Academy of Sciences20 Nanxincun, Xiangshan, Haidian District, Beijing 100093, P. R. China
Calibration Information
Open-path analyzers were calibrated twice per year with standard CO2 gases and a dew point generator (LI610, LI-COR).
Infrastructure
Tower, Solar Power, Facility for Accommodation Available.
Research Fund
The equipments of tower were funded by Institute of Botany, CAS; The maintenance of tower was partly supported by "100 Talents" project of CAS to Dr. Guanghui Lin and National Aeronautics and Space Administration (NASA) Grant (NEWS 2004 NRA: NN-H-04-Z-YS-005-N) of the Land-Cover / Land-Use Program
