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JRS: Jurong Ecological Experimental Station

General site detail (Updated 16 January 2020)
 Site name
 Jurong Ecological Experimental Station
 AsiaFlux code
 JRS
 Location Jurong City, Jiangsu Province, China
 Position 31° 48' 24.59" N,  119° 13' 2.15" E
 Elevation 15m a.s.l
 Slope 1-2 deg
 Terrain type
 Flat
 Area 40 ha
 Fetch 100-200m
 Climate Mild with no dry season, hot summer (Cfa)
 Mean annual air temperature
 15.5 ℃ (1981-2010) Jurong Meteorological 
 Observatory (about 17km away from JRS)
 Mean annual precipitation
 1099.1 mm
 Vegetation type
 Summer rice-winter wheat rotation agroecosystem
 Dominant species (Overstory)
 Summer rice-winter wheat
 Dominant species (Understory)
 -
 Canopy height
 about 0.8-1.5 m
 Age 1 year old
 LAI 5.5 m2m-2 (rice maximum LAI), 
 4.0 m2m-2 (wheat maximum LAI)
 Soil type
 Typic Hapli-Stagnic Anthrosol (or waterlogged 
 paddy soil) (China) or as Typic Haplaquepts 
 (USDA)

Observations
Meteorology
 Observation items
 Levels / Depth 
 Instrument
 Global solar radiation
 (incoming)
 2.25 m
 Four-component radiometer
 (CNR4, Netherlands)
 Global solar radiation
 (outgoing)
 2.25 m
 Four-component radiometer (CNR4)
 Long-wave radiation
 (incoming)
 2.25 m
 Four-component radiometer (CNR4)
 Long-wave radiation
 (outgoing)
 2.25 m
 Four-component radiometer (CNR4)
 Net radiation
 2.25 m
 Four-component radiometer (CNR4)
 PPFD (incoming)
 2.25 m
 Quantum sensor (LI-190SL, USA)
 PPFD (outgoing)
 2.25 m
 Quantum sensor (LI-190SL, USA)
 Air temperature
 0.50, 2.60 m
 Humidity and temperature probes
 (HMP155, Finland)
 Humidity 0.50, 2.60 m 
 Humidity and temperature probes
 (HMP155, Finland)
 Soil temperature
 0.05, 0.10, 0.20, 
 0.30, 0.50 m
 Soil temperature sensors 
 (LI-7900-180, USA)
 Soil heat flux
 0.05 m x 3
 Heat flux plate (HFP01, Netherlands)
 Soil water content
 0.05, 0.20 m
 Soil probes 
 (Stevens Hydra ProbeⅡ, USA)
 Wind speed
 3.5 m
 3D ultrasonic anemometer
 (WindMaster Pro, UK)
 Wind direction
 3.5 m
 3D ultrasonic anemometer 
 (WindMaster Pro, UK)
 Barometric pressure
 3.5 m
 3D ultrasonic anemometer
 (WindMaster Pro, UK)
 Precipitation 2.0 m
 Tipping bucket rain gauge 
 (TR-525M, USA)
 
 Eddy covariance method (CO2)
 System Open-path system (CO2 flux, latent heat flux)
 Wind speed
 3D ultrasonic anemometer (WindMaster Pro, UK)
 Air temperature
 3D ultrasonic anemometer (WindMaster Pro, UK)
 Water vapor
 Open-path CO2/H2O analyzers (LI-7500A, USA)
 CO2 Open-path CO2/H2O analyzers (LI-7500A, USA)
 Measurement height
 3.5 m
 Sampling frequency
 10 Hz
 Averaging time
 30 min
 Data logger
 Sutron 9201B, USA
 Data storage
 Flash memory
 Original data
 Raw data

 Fluxes of non-CO2 gases
 Gas CH4
 Method CH4 (open-path EC (LI-7700, USA))
 Measurement height
 CH4 (3.5 m)
 Data logger
 Sutron 9201B, USA
 Data storage
 Flash memory

 Other
 Photosynthesis
 Occasionally
 Ecological Investigation
 LAI, Biomass, plant height, root length, grain yield
 
Observation Period and Data Availability
 Measurement Period
 From April 2015 to December 2016
 Measurement Frequency
 Continuous
 Data Availability
 N/A

Contact
 [Flux and Micrometeorology]
 Weimin Ju (juweimin[at]nju.edu.cn)
 International Institute for Earth System Sciences (ESSI),
 Nanjing University (NJU)
 B433 Kunshan Building, 163 Xianlin Avenue, Qixia District, Nanjing,
 Jiangsu Province, 210023 China
 Phone: +86-25-83595670    Fax: +86-25-83592288
 [Sun-Induced chlorophyll Fluorescence, SIF]
 Yongguang Zhang (yongguang_zhang[at]nju.edu.cn)
 International Institute for Earth System Sciences (ESSI),
 Nanjing University (NJU)
 B435 Kunshan Building. 163 Xianlin Avenue, Qixia District, Nanjing,
 Jiangsu Province, 210023 China
 Phone: +86-25-89681569    Fax: +86-25-89687077
 [General Administrator]
 Yanlian Zhou (zhouyl[at]nju.edu.cn)
 School of Geography and Ocean Sciences (SGOS),
 Nanjing University (NJU)
 163 Xianlin Avenue, Qixia District, Nanjing, Jiangsu Province,
 210023 China
 Phone: +86-25-89681569    Fax: +86-25-89687077

Infrastructure
 Tower, Electrical power (AC), Facilities for Communication (internet)

Research Fund
 #1 National Key R&D Program of China (2016YFA0600202)
 #2 National Natural Science Foundation of China (41671343)
 #3 National Natural Science Foundation of China (41671421)

Publication
 Shengpei DAI, Weimin JU, Yongguang ZHANG, Qiaoning HE, Lian SONG,
 Ji LI. Variations and drivers of methane fluxes from a rice-wheat rotation
 agroecosystem in eastern China at seasonal and diurnal scales. Science
 of the Total Environment, 2019, 690:973-990.
 
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