YCS: Yuchen Site
General site details
| Site name | Yuchen Site |
|---|---|
| AsiaFlux site code | YCS |
| Location | Yuchen county, Shandong Province |
| Position | 116.34°E, 36.50°N |
| Elevation | 28 m above sea level |
| Slope | |
| Terrain type | Yellow River alluvial plain |
| Area | |
| Fetch | |
| Climate | semi-humid and monsoon climate |
| Mean annual air temperature | 13.1 deg C |
| Mean annual precipitation | 528 mm |
| Vegetation type | crops |
| Dominant Species (Overstory) | winter wheat,corn |
| Dominant Species (Understory) | - |
| Canopy height | - |
| Age | - |
| LAI | - |
| Soil type | alluvial deposit of Yellow River and main is aquox and salted aquox |
Observation
Eddy Covariance method (CO2)
| System | Open path combined with closed path system (CO2 flux, latent heat flux) |
|---|---|
| Wind speed | Three dimensional sonic anemometer (CSAT3, CAMPBELL SCIENTIFIC) |
| Air temperature | |
| Water vapor | Open and closed path CO2/H2O analyzers (LI-7500 and LI-7000, LI-COR) |
| CO2 | Open and closed path CO2/H2O analyzers (LI-7500 and LI-7000, LI-COR) |
| Measurement height | 2 m |
| Sampling frequency | 10 Hz |
| Averaging time | 30 min |
| Data logger | CR5000 (CSI USA) |
| Data storage | |
| Original data | Raw data |
Meteorology
| Observation items | Levels/Depth | Instrument |
|---|---|---|
| Global solar radiation(incoming) | 1 m | CM11 (Kipp & Zonen, The Netherlands) |
| Global solar radiation (outgoing) | ||
| Long-wave radiation(incoming | 1 m | CM11 (Kipp & Zonen, The Netherlands) |
| Long-wave radiation(outgoing) | 1 m | CM11 (Kipp & Zonen, The Netherlands) |
| Net radiation | 1 m | CM11 (Kipp & Zonen, The Netherlands) |
| Air temperature | 1 m, 2 m | HMP45C, VAISALA, Finland |
| Humidity | 1 m, 2 m | HMP45C, VAISALA, Finland |
| Soil temperature | -5cm,-10cm,-20cm,-40cm,-80cm/-2cm,-5cm,-10cm,-20cm,-50cm | Probe (105T/107, CAMPBELL SCIENTIFIC) |
| Soil heat flux | -5cm | Heat flux plate (HFP01, HUKSEFLUX) |
| Soil water content | -20 cm, -40cm | CS616, Campbell Scientific Inc., Logan, UT, USA |
| Wind speed | 1 m, 2 m | Anemometer (A100R, VECTOR INSTRUMENTS) |
| Wind direction | 2 m | Wind vane (W200P, VECTOR INSTRUMENTS) |
| Barometric pressure | 1 m | Barometer (CS105, VAISALA) |
| Precipitation | 1 m | Tipping-bucket rain gauge (52203, RM YOUNG) |
| CO2concentration |
Other
| Soil respiration | - |
| Photosynthesis | - |
| Ecological investigation |
Observation Period and Data Availability
| Measurement Period | |
|---|---|
| Measurement Frequency | Continuous |
| Data Availability | 2003-2005 in AsiaFlux database |
Contact
Zhao Fenghua (zhaofh [at] igsnrr.ac.cn)
Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Science
11A, Datun Road, Chaoyang District, Beijing, 100101, P.R.China