GBK: Gimje Soybean Field
 
 
General site detail (Updated 20 May 2024)
 Site name
 Gimje Soybean Field
 AsiaFlux site code
 GBK
 Location Yeonpo-ri, Juksan-myeon, Gimje-si, Korea
 Position 35°45'03.301"N, 126°48'49.500"E
 Elevation 6m above sea level
 Slope N/A
 Terrain type
 Flat
 Area Farmland
 Fetch N/A
 Climate Continental Climate (Dfa)
 Mean annual air temperature
 13.4 ℃ (2013-2022)
 Mean annual precipitation
 1,094 mm (2013-2022)
 Vegetation type
 Soybean Field
 Dominant Species (Overstory)
 Glycine max (L.) Merrill
 Dominant Species (Understory)
 -
 Canopy height
 ~ 1 m
 Age Annual Plant
 LAI ~ 6 (±1)
 Soil type
 N/A

Observations
Eddy Covariance method (CO2)
 System Open-path (CO2 flux, latent heat flux)
 Wind speed
 3D sonic anemometer (CSAT3)
 Air temperature
 3D sonic anemometer (CSAT3)
 Water vapor
 Open path infrared gas analyzer (EC-150)
 CO2 Open path infrared gas analyzer (EC-150)
 Measurement height
 4 m
 Sampling frequency
 10 Hz
 Averaging time
 30 min.
 Data logger
 CR3000 (Campbell Sci., Inc., USA)
 Data storage
 CF card
 Original data
 Statistics (Raw data is also available)

Meteorology
 Observation items
 Levels / Depth
 Instrument
 Global solar radiation
 (incoming)
 1.5m Net radiometer (CNR4, Kipp & Zonen, Netherlands)
 Global solar radiation
 (outgoing)
 1.5 m
 Net radiometer (CNR4)
 Long-wave radiation
 (incoming)
 1.5 m
 Net radiometer (CNR4)
 Long-wave radiation
 (outgoing)
 1.5 m
 Net radiometer (CNR4)
 Net radiation
 1.5 m
 Net radiometer (CNR4)
 Air temperature
 1.5 m, 4 m
 Temperature and RH prove (HPM155, Vaisala, Finland)
 Humidity 1.5 m, 4 m
 Temperature and RH prove (HMP155)
 Soil temperature
 -0.3 m
 Soil thermocouple prove (TCAV, Campbell Sci., Inc., USA)
 Soil heat flux
 -0.3 m
 Heat Flux plate (HFP-1, Campbell Sci., Inc., USA)
 Soil water content
 -0.3 m
 Water content reflectometer (CS-616, Campbell Sci., Inc., UAS)
 Wind speed
 4 m
 3D sonic anemometer (CSAT3, Campbell Sci., Inc., USA)
 Wind direction
 4 m
 3D sonic anemometer (CSAT3)
 Barometric pressure
 4 m
 Open path infrared gas analyzer (EC-150, Campbell Sci., Inc., USA)
 Precipitation 1.5 m
 Tipping bucket rain gauge
 CO2 concentration
 4 m
 Open path infrared gas analyzer (EC-150)
 H2O concentration
 4 m
 Open path infrared gas analyzer (EC-150)

Other
 Photosynthesis Portable chamber (LI-6400XT, Li-Cor)
 Canopy structure
 Digital camera, LED sensor
 Ecological investigation
 LAI, Plant height, Dry weight
 Soil respiration
 N/A

 
Observation Period and Data Availability
 Measurement Period
 June 2016 to present
 Measurement Frequency
 Continuous
 Data Availability
 -

Contact
 Mingu Kang (hyekky[at]korea.kr)
 National Institute of Agricultural Sciences,
 Rural Development Administration
 166, Nongsaengmyeong-ro, Iseo-myeon, Wanju-gun, Jeollabuk-do,
 55365, KOREA
 Phone: +82-63-238-2523  Fax: +82-63-238-3823
 Kyo-Moon Shim (kmshim[at]korea.kr)
 National Instiute of Agricultural Sciences,
 Rural Development Administration
 166, Nongsaengmyeong-ro, Iseo-myeon, Wanju-gun, Jeollabuk-do,
 55365, KOREA
 Phone: +82-63-238-2518  Fax: +82-63-238-3823

Infrastructure
 Tower, Electrical power (AC)

Research Fund
 Rural Development Administration Research and Development Program (Project No. PJ014892)

Calibration Information
 Open-path gas analyzer (EC-150) were calibrated approximately in every year with standard CO2 gases and a dew point generator (LI-610, Li-Cor, USA).

Publications
 Jina Hur et al. (2020). Estimation and Comparison of Carbon Uptake in Rice Paddy, Dry Cropland and Grove in South Korea using Eddy Covariance Flux Data. Korean Journal of Environmental Agriculture 39(4): 334-342.