GBK: Gimje Soybean Field
General site details
| 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 |
Observation
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) | 1.5 m | 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).
Publication
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.