JND: Jiangdu Flux Site
General site details
| Site name | Jiangdu Flux Site |
|---|---|
| AsiaFlux site code | JND |
| Location | Jiangdu, Jiangsu Province, China |
| Position | 32º35’54.4" N, 119º42'24.9"' E |
| Elevation | 3m |
| Slope | Flat |
| Terrain type | Agricultural land |
| Area | over 50 ha |
| Fetch | 400 m to the east, 260 m to the south, 300 m to the southwest, and >500 m to other directions. |
| Climate | Cfa |
| Mean annual air temperature | 14.9ºC (Jiangdu) |
| Mean annual precipitation | 918 mm (Xiaoji, Jiangdu) |
| Vegetation type | Rice and wheat |
| Dominant Species (Overstory) | Rice (Oryza sativa L.) from June to October and wheat (Triticum spp.) from November to May |
| Dominant Species (Understory) | - |
| Canopy height | Variable with season. The maximum canopy height is 1.0 m for rice and 0.9 m for wheat. |
| Age | - |
| LAI | Variable with time. |
| Soil type | Shajiang Aquic Cambosols with a sandy-loamy texture |
Observation
Eddy Covariance method (CO2)
| System | Open-path system (CO2 flux, latent heat flux) |
|---|---|
| Wind speed | 3D sonic anemometer(CSAT3, Campbell Sci., Inc., USA) |
| Air temperature | 3D sonic anemometer(CSAT3, Campbell Sci., Inc., USA) |
| Water vapor | Open path(LI-7500, Li-Cor, USA) |
| CO2 | Open path(LI-7500, Li-Cor, USA) |
| Measurement height | 2.9 m |
| Sampling frequency | 10 Hz |
| Averaging time | 30 min |
| Data logger | CR3000 (Campbell, USA) |
| Data storage | CF |
| Original data | Raw data |
Meteorology
| Observation items | Levels/Depth | Instrument |
|---|---|---|
| Global solar radiation(incoming) | 2.4 m | Four-component net radiometer,CNR1 ( Kipp & Zonen ) |
| Global solar radiation (outgoing) | 2.4 m | Four-component net radiometer,CNR1 ( Kipp & Zonen ) |
| Long-wave radiation(incoming) | 2.4 m | Four-component net radiometer,CNR1 ( Kipp & Zonen ) |
| Long-wave radiation(outgoing) | 2.4 m | Four-component net radiometer,CNR1 ( Kipp & Zonen ) |
| Net radiation | 2.4 m | Four-component net radiometer,CNR1 ( Kipp & Zonen ) |
| PPFD (incoming) | 2.3 m | Quantum sensor (LI-190S, LI-COR, USA) |
| PPFD (outgoing) | 2.3 m | Quantum sensor (LI-190S, LI-COR, USA) |
| Direct / diffuse radiation | - | |
| Direct / diffuse PPFD | - | |
| Air temperature | 1.5, 2.8 m | Temperature-humidity sensor, HMP45 (Vaisala ) with home-made ventilator |
| Humidity | 1.5, 2.8 m | Temperature-humidity sensor, HMP45 (Vaisala ) with home-made ventilator |
| Soil temperature | 1,5,10,20,40 cm | T-type thermocouple, home-made |
| Soil heat flux | 1 cm | Heat flux plate, MF-180M (Eko) |
| Soil water content | 0 - 10 cm | Soil moisture probe, ECH<sub>2</sub>O EC-TM (Decagon) |
| Wind speed | 2.9 m | Sonic anemometer-thermometer (Campbell CSAT3) |
| Wind direction | 2.9 m | Sonic anemometer-thermometer (Campbell CSAT3) |
| Barometric pressure | 1.5 m | Silicon-capacitive pressure probe, PTB101B (Vaisala) |
| Precipitation | 1.5 m | Tipping bucket rain gauge, TE525MM (Texas Electronics); measured at the ChinaFACE site |
| CO2 concentration | - | |
| Surface temperature | 2.3 m | Infrared thermometer, SI-100 (Apogee) |
Other
| O3 | Gradient (half hourly) 2007-2011 |
| Soil respiration | - |
| Photosynthesis | - |
| Ecological investigation | - |
Observation Period and Data Availability
| Measurement Period | from December 2006 to present |
|---|---|
| Measurement Frequency | Continuous |
| Data Availability | N/A |
Contact
Akira Miyata (amiyat [at] niaes.affrc.go.jp)Agro-Meteorology Division,National Institute for Agro-Environmental Sciences (NIAES)
3-1-3, Kannondai, Tsukuba, Ibaraki 305-8604, Japan
TEL: + 81-29-838-8207 FAX: + 81-29-838-8211
http://ecomdb.niaes5.affrc.go.jp/
Jinguo Zhu (jgzhu [at] issas.ac.cn)
Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 71 East Beijing St., Nanjing 210008, Peoples Republic of China
Masayoshi Mano (mano [at] chiba-u.jp)
Chiba University
Haoye Tang (hytang [at] issas.ac.cn)
Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science, Chinese Academy of Sciences71 East Beijing St., Nanjing 210008, Peoples Republic of China
Keisuke Ono (onok [at] niaes.affrc.go.jp)
Agro-Meteorology Division,National Institute for Agro-Environmental Sciences (NIAES)
3-1-3, Kannondai, Tsukuba, Ibaraki 305-8604, Japan
TEL: + 81-29-838-8239 FAX: + 81-29-838-8211 http://ecomdb.niaes5.affrc.go.jp/
Research Fund
Global Environment Research Fund, MOE International S & T Cooperation Program, MOST Knowledge Innovation Program, CAS
Calibration Information
The sensor head of the open-path infrared gas analyzer (LI-7500) was replaced by the calibrated sensor head twice a year, after each growing season.