DW7: Dongwu steppe General site detail (Updated 24 July 2007)
Site name
Dongwu steppe
AsiaFlux site code
DW7
Location
Dongwu, Inner Mongolia, China
Position
117º 00' 01'' E, 45º 33' 36'' N
Elevation
865 m above sea level
Slope
-
Terrain type
Flat
Area
About 20 ha
Fetch
200-400 m
Climate
Temperate continental climate
Mean annual air temperature
1 deg C (1994-2004)
Mean annual precipitation
260 mm (1994-2004)
Vegetation type
Typical steppe
Domestic species (Overstory)
Stipa grandis, Leymus chinensis
Dominant species (Understory)
-
Canopy height
0.2 -0.4 m
Age
-
LAI
-
Soil type
Chestnut soil
Observations Eddy Covariance method (CO2)
System
Open-path system
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 (Campbell, USA)
Data storage
CF
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
-
Observation Period and data Availability
Measurement Period
From August 2005 to present
Measurement Frequency
Continuous
Data Availability
N/A
Contact
Shiping Chen (spche [at] nibcas.ac.cn) Institute of Botany, the Chinese Academy of Sciences20 Nanxincun, Xiangshan, Haidian District, Beijing 100093, P. R. China Tel: +86-10- 62836279; Fax: +86-10-62599059
Calibration Information
Open-path analyzers were calibrated twice per year with standard CO2 gases and a dew point generator (LI610, LI-COR).
Infrastructure
Tower, Electrical power (AC) , Accommodation
Research fund
Supported by National Aeronautics and Space Administration (NASA) Grant (NEWS 2004 NRA: NN-H-04-Z-YS-005-N) of the Land-Cover / Land-Use Program
