D02: Duolun cropland General site detail (Updated 24 July 2007)
Site name
Duolun cropland
AsiaFlux site code
D02
Location
Duolun, Inner Mongolia, China
Position
116º 16' 47'' E, 42º 02' 44'' N
Elevation
1350 m above sea level
Slope
-
Terrain type
Flat
Area
More than 50 ha
Fetch
300-400 m
Climate
Temperate continental climate
Mean annual air temperature
3.3 deg C (1994-2004)
Mean annual precipitation
399 mm (1994-2004)
Vegetation type
Cropland
Domestic species (Overstory)
Triticum aestivum L., Avena nuda L., and Fagopyrum esculentum Moench.
Dominant species (Understory)
-
Canopy height
0.5 - 1 m
Age
35 years in 2007
LAI
1.2 (2006)
Soil type
Chestnut soil
Observations Eddy Covariance method (CO2)
System
Open-path system
Wind speed
Three dimensional sonic anemometer (CSAT3, Campbell scientific, USA)
Air temperature
Three dimensional sonic anemometer (CSAT3, Campbell scientific, USA)
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
Li 7500, Li-Cor Inc., Lincoln, NE, USA
Other
Soil respiration
Li 6400 (LI-COR, USA)
Photosynthesis
Li 6400 (LI-COR, USA)
Ecological investigation
LAI, Li 3000A (LI-COR, USA)
Observation Period and data Availability
Measurement Period
From May 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. ChinaTel: +86-10- 62836279; Fax: +86-10-62599059
[Soil respiration and vegetation survey] Ping Zhang (zp [at] ibcas.ac.cn) Institute of Botany, the Chinese Academy of Sciences 20 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).
Publication
Zhang WL., Chen SP, Chen J, Wei L, Han XG, Lin GH. 2007. Biophysical regulations of carbon fluxes of a steppe and a cultivated cropland in semiarid Inner Mongolia. Agric. For. Meteorol.
Infrastructure
Tower, Electrical power (AC), Accommodation
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
