PRW: Paddy rice flux plot _ Panjin Wetland Ecosystem Research Station
General site details
| Site name | Paddy rice flux plot _ Panjin Wetland Ecosystem Research Station |
|---|---|
| AsiaFlux site code | PRW |
| Location | Shuangtai Estuary National Nature Reserve, Panjin, Liaoning province, China |
| Position | 41º 08.7' N, 121º 54.9' E (GPS) |
| Elevation | 7 m a.s.l. (GPS) |
| Slope | 0º |
| Terrain type | AreaAlluvial plain |
| Area | 750 km2 |
| Fetch | 350 m |
| Climate | Continental semi-humid monsoon climate of warm temperate zone |
| Mean annual air temperature | 8.6°C |
| Mean annual precipitation | 631 mm |
| Vegetation type | Rice paddy |
| Dominant Species (Overstory) | Oryza sativa L. |
| Dominant Species (Understory) | - |
| Canopy height | 90 cm |
| Age | - |
| LAI | 7 |
| Soil type | Paddy soil |
Observation
Eddy Covariance method (CO2)
| System | Open-path system |
|---|---|
| Wind speed | CSAT3 3-D SONIC Anemometer |
| Air temperature | HMP45C, Vaisala, Helsinki, Finland |
| Water vapor | CS 7500 (LI-COR LI 7500 open-path CO2/H2O Analyzer) |
| CO2 | CS 7500 (LI-COR LI 7500 open-path CO2/H2O Analyzer) |
| Measurement height | 3m |
| Sampling frequency | 10 Hz |
| Averaging time | 30 min |
| Data logger | CR 5000 |
| Data storage | PC card |
| Original data | Raw data |
Meteorology
| Observation items | Levels/Depth | Instrument |
|---|---|---|
| Global solar radiation(incoming) | 5 m | CNR1, Kipp & Zonen. Corp., Delft, Holland |
| Global solar radiation (outgoing) | 5 m | CNR1, Kipp & Zonen. Corp., Delft, Holland |
| Long-wave radiation(outgoing) | 5 m | CNR1, Kipp & Zonen. Corp., Delft, Holland |
| Long-wave radiation(outgoing) | 5 m | CNR1, Kipp & Zonen. Corp., Delft, Holland |
| Net radiation | 5 m | CNR1, Kipp & Zonen. Corp., Delft, Holland |
| PPFD (incoming) | 6.5 m | LI-190Sb，LI-COR Inc., Lincoln, NE, USA |
| PPFD (outgoing | - | |
| Direct / diffuse radiation | - | |
| Direct / diffuse PPFD | - | |
| Air temperature | 4, 6.5 m | HMP45C, Vaisala, Helsinki, Finland |
| Humidity | 4, 6.5 m | HMP45C, Vaisala, Helsinki, Finland |
| Soil temperature | 5, 10, 15, 20, 40, 80 cm | 107L, Campbell Scientific Inc., USA |
| Soil heat flux | 8 cm | HFP01, Hukseflux Inc., Netherlands |
| Soil water content | 5 cm | CS616, Campbell Scientific Inc., USA |
| Wind speed | 4, 6.5 m | 014A, Campbell Scientific Inc., MS, USA |
| Wind direction | 6.5 m | 034B, Campbell Scientific Inc., MS, USA |
| Barometric pressure | 3 m | CS 7500 (LI-COR LI 7500 CO2/H2O Analyzer) |
| Precipitation | Above the canopy | 52203, RM Young Inc., Traverse City, MI, USA |
| CO2 concentration | - |
Other
| Soil respiration | Chamber |
| Photosynthesis | LI-6400R Portable Photosynthesis System |
| Ecological investigation | Biomass, Height, Leaf area index, Soil physical and chemistry properties, Soil microbial features |
Observation Period and Data Availability
| Measurement Period | June 2004 to present |
|---|---|
| Measurement Frequency | Continuous |
| Data Availability | N/A |
Contact
Guangsheng ZHOU (gszhou [at] ibcas.ac.cn) Key Laboratory of Vegetation and Environmental Change, Institute of Botany,the Chinese Academy of Sciences, 20 Nanxincun, Xiangshan, Haidian District, Beijing 100093, China
Xiaoying Wang (wangxy_0917 [at] yahoo.com.cn) Xianli ZHAO (zhaoxianli2001 [at] yahoo.com.cn) Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, 66 Wenhua Road, Shenhe District, Shenyang 110016, Liaoning Province, China
Other Yanbing Xie (xieyanbing1979 [at] yahoo.com.cn)
Infrastructure
EC-tower and micrometeorological tower
Research Fund
'Mechanism of environmental pollution and ecological rehabilitation in Northeast industry base' funded by State Science and Technology Committee (2004CB418507-1)
Calibration Information
Calibrations for all instruments would be done once a year