JND: Jiangdu Flux Site

General site detail (updated 7 March 2012)
 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
 Domestic 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

Observations
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, ECH2O 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
 COconcentration
 - 
 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/
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.
Research fund
 Global Environment Research Fund, MOE
 International S & T Cooperation Program, MOST
 Knowledge Innovation Program, CAS