[TMK]
Tomakomai Flux Research Site
  • Site Description
  • Observation
  • Researchers
  • Note

    • Eddy correlation method

    System Open- and closed-path system (CO2 flux, latent heat flux)
    Wind speed Three-dimensional sonic anemometer-thermometer (DA600-3TV (Probe TR-61C), KAIJO)
    Air temperature Three-dimensional sonic anemometer-thermometer (DA600-3TV (Probe TR-61C), KAIJO)
    Water Vapor Open- and Closed-path CO2/H2O analyzers (LI-7500 and LI-6262, LI-COR)
    CO2 Open- and Closed-path CO2/H2O analyzers (LI-7500 and LI-6262, LI-COR)
    Measurement height 27 and 42 m
    Sampling frequency 10 Hz
    Averaging time 30 min
    Data logger DRM3a, TEAC, Japan
    Data storage MO
    Original data (Raw data or statistics) Raw data

    Meteorology

    Observation items Levels / Depth Instrument
    Global solar radiation (incoming) 41, 18, 14, 5, 1.5 (six points) m
    40, 18, 1.5 m    		 Pyranometer (MS-601, Eko, Japan) Radiometer (MR40, Eko, Japan)
    Global solar radiation (outgoing) 40, 18, 1.5 m Radiometer (MR40, Eko, Japan)
    Long-wave radiation (incoming) 40, 18, 1.5 m Radiometer (MR40, Eko, Japan)
    Long-wave radiation (outgoing) 40, 18, 1.5 m Radiometer (MR40, Eko, Japan)Radiometer (MR40, Eko, Japan)
    Net radiation 40, 18, 1.5 m Radiometer (MR40, Eko, Japan)
    PPFD (incoming) 40, 18, 5, 1.5 (three points) m Quantum sensor (LI-190S, LI-COR)
    PPFD (outgoing) 40 m Quantum sensor (LI-190S, LI-COR)
    Direct/diffuse radiation - -
    Direct/diffuse PPFD - -
    Air temperature 40, 27, 22, 18, 14, 8, 5, 1.5 m Platinum resistance thermometer and capacitive hygrometer (HMP45D, Vaisala)
    Humidity 40, 27, 22, 18, 14, 8, 5, 1.5 m Platinum resistance thermometer and capacitive hygrometer (HMP45D, Vaisala)
    Soil temperature 0, 0.05, 0.1, 0.2, 0.5 m (three points) Platinum resistance thermometer
    Soil heat flux 0.05 m (five points) Heat flux plate (MF-81, Eko, Japan)TDR sensor (CS615, Campbell)
    Soil water content 0.05 (three points), 0.1 (two points) m TDR sensor (CS615, Campbell)
    Wind speed 40, 27, 23, 18,14, 8.0, 5.0, 1.5 m Sonic anemometer (MA-130A, Eko, Japan)
    Wind direction 40, 27, 23, 18,14, 8.0, 5.0, 1.5 m Sonic anemometer (MA-130A, Eko, Japan)
    Barometric pressure 40, 18, 8, 5 m Barometer (PTB100, Vaisala)
    Precipitation 41, 1.5 (three points) m Tipping-bucket rainguage with heater (52 202, R. M. Young)
    CO2 concentration 41, 38, 32, 26, 22, 16, 12, 6, 3, 1 m Closed-path CO2/H2O analyzer (LI-6262, LI-COR)

    Other

    Soil respiration Continuous (automated chambers)
    Photosynthesis Occasionally
    Ecological Investigation Tree heights, stand density, diameter, biomass, LAI (1999, 2001, 2003)