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VIC: VietCarbo site - Rice paddle field in Mekong Delta, Vietnam
VIC site photos

General site details (Updated February 26, 2025)
 Site name
 VietCarbo Site-Rice paddle field in Mekong Delta, Vietnam
 AsiaFlux site code
 VIC
 Location Tan Hung, Long An, Vietnam
 Position 10°46'49.4″ N, 105°46'1.1″ E
 Elevation 1 m above sea level
 Slope -
 Terrain type
 Flat
 Area 500 ha
 Fetch 200 m
 Climate Tropical savanna climate (Aw)
 Mean annual air temperature
 27 ℃
 Mean annual precipitation
 1448 mm
 Vegetation type
 Paddy field
 Dominant Species (Overstory)
 Rice (Oryza sativa)
 Dominant Species (Understory)
 none
 Canopy height
 0.1 - 1.2 m
 Age 3 crops per year, 0-90 days/crop
 LAI -
 Soil type
 Gray and acid sulfate soil (Thionic Fluvisols)

Observation
Eddy Covariance method (CO2)
 System Closed-path
 Wind speed
 Three-dimensional sonic anemometer (HS-50, Gill)
 Air temperature
 Closed-path CO2/H2O analyzer (LI-7200, LI-COR)
 Water vapor
 Closed-path CO2/H2O analyzer (LI-7200, LI-COR)
 CO2 Closed-path CO2/H2O analyzer (LI-7200, LI-COR)
 Measurement height
 2 m
 Sampling frequency
 20 Hz
 Averaging time
 30 min
 Data logger
 LI-7550, LI-COR
 Data storage
 LI-7550 and SmartFlux, LI-COR
 Original data
 Raw data

Meteorology
 Observation items
 Levels/Depth Instrument
 Global solar radiation
 (incoming)
 2 m
 Pyranometers (CNR4, Kipp & Zonen)
 Global solar radiation
 (outgoing)
 2 m
 Pyranometers (CNR4, Kipp & Zonen)
 Long-wave radiation
 (incoming)
 2 m
 Pyranometers (CNR4, Kipp & Zonen)
 Long-wave radiation
 (outgoing)
 2 m
 Pyranometers (CNR4, Kipp & Zonen)
 Net radiation
 2 m
 Pyranometers (CNR4, Kipp & Zonen)
 PPFD (incoming)
 3.2 m
 Quantum sensor (EMS12, EMS Brno)
 PPFD (outgoing)
 - -
 Direct/diffuse radiation
 - -
 Direct/diffuse PPFD
 - -
 Air temperature
 1.2, 2, 3 m
 Humidity and temperature probe
 (HMP155, Vaisala)
 Humidity 1.2, 2, 3 m
 Humidity and temperature probe
 (HMP155, Vaisala)
 Soil temperature
 0, 0.05, 0.1, 0.2,
 0.3, 0.5 m
 Temperature sensor probe
 (Pt100, Sensit)
 Soil heat flux
 0.05 m
 Heat flux plate
 (HFP01SC-05, Huxeflux)
 Soil water content
 0.05, 0.1, 0.2, 
 0.3 m
 TDR sensor (CS616-L, Campbell)
 Wind speed
 2 m
 Sonic anemometer (HS-50, Gill)
 Wind direction
 2 m
 Sonic anemometer (HS-50, Gill)
 Barometric pressure
 N/A N/A
 Precipitation 1 m

 2 m
 Tipping Bucket Rain Gauges
 (370D-9800, Met One)
 Laser  Precipitation Monitor (Part number: 5.4110.10.xxx, Thies Clima)
 CO2 concentration
 2 m
 Closed-path CO2/H2O analyzer
 (LI-7200, LI-COR)
 Water level
 0.02 m
 Water level probe (LMP307i, BD sensors)

Fluxes of non-CO2 gases
 Gas CH4
 Method Open-path (LI-7700, LI-COR)
 Measurement height
 2 m
 Data logger
 LI-7550, LI-COR
 Data storage
 LI-7550 and SmartFlux, LI-COR

Other
 Ecological Investigation
 Biomass, plant height, grain yield

 
Observation Period and Data Availability
 Measurement Period
 April 2019 to present
 Measurement Frequency
 Continuous
 Data Availability
 -

Contact
 Huong Quynh Pham (pqhuong[at]hcmus.edu.vn)
 Research center for Greenhouse gases and Climate change,
 VNUHCM-University of Science
 227 Nguyen Van Cu, Ward 4, District 5, Hochiminh City, Vietnam
 Tel: +84-91-314-5864
 [General - Czech Republic]
 Marian Pavelka (pavelka.m[at]czechglobe.cz)
 Global Change Research Institute (CzechGlobe)
 Czech Academy of Science - CAS
 Bĕlidla 986/4a, CZ-60300 Brno, Czech Republic
 Tel: +420-728183788
 [General - Vietnam]
 Son Thi Le (ltson[at]hcmus.edu.vn)
 Research center for Greenhouse gases and Climate change,
 VNUHCM-University of Science
 227 Nguyen Van Cu, ward 4, district 5, Hochiminh City, Vietnam
 Tel: +84-38-931-0398
 [Data analysis - Czech Republic]
 Vu Hoang Ngoc Khue (vu.k[at]czechglobe.cz)
 Global Change Research Institute (CzechGlobe)
 Czech Academy of Science - CAS
 Bĕlidla 986/4a, CZ-60300 Brno, Czech Republic
 Tel: +420-736797879
 [Other Researchers (e-mail)]
 [Environmental advisor-Vietnam]
   Bang Quoc Ho (hqbang[at]vnuhcm.edu.vn)
 [Technical-Vietnam] Anh Vu Le Dinh (ldavu[at]hcmus.edu.vn)
 [Data analysis-Vietnam] An Thanh Bui (btan[at]hcmus.edu.vn)
 [Technical advisor-Czech Republic]
   Jiři Dušek (dusek.j[at]czechglobe.cz)
 [Technical-Czech Republic] Karel Stanik (stanik.k[at]czechglobe.cz)
 [Biomet data-Czech Republic]
   Jan Trusina (trusina.j[at]czechglobe.cz)

Infrastructure
 Ponton, Electrical power (DC), Facilities for communication (internet)

Research Fund
 VNUHCM-University of Science
 CzechGlobe - Global Change Research Institute
 [Other information] The station was established within the framework of scientific cooperation between University of Science and CzechGlobe. 

Calibration Information
 Closed-path and Open-path analyzers were yearly with standard CO2, CH4 gases and a dew point generator (LI610, LI-COR).

Publication
 Pham, H. Q., Pavelka, M., Dušek, J., Nguyen, V. X., Vu, K. H. N., Bui, A. T., & Le, S. T. (2022, December). Net Ecosystem Exchange of Carbon Dioxide in Rice Summer-Autumn crop of the lower Mekong delta, Vietnam. In /OP Conference Series: Earth and Environmental Science (Vol. 1116, No.1, p.012079). IOP Publishing.



 
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