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Kiryu Experiment Watershed
  • Site Description
  • Observation
  • Researchers
  • Note
  • Eddy Correlation Method

    System Closed-path system (2001.1.1 - 2003.12.31)
    Open-path system (2002.4.30-present)
    Wind speed Three-dimensional sonic anemometer-thermometer (DA600-3T Probe TR-61C, KAIJO, Japan)
    Air temperature Three-dimensional sonic anemometer-thermometer (DA600-3T Probe TR-61C, KAIJO, Japan), Platinum resistance thermometer (HMP45A, VAISALA, Finland)
    Water Vapor Open-path (LI-7500, LI-COR, USA), closed-path (LI-6262 or LI-7000, LI-COR, USA)
    CO2 Open-path (LI-7500, LI-COR, USA), closed-path (LI-6262 or LI-7000, LI-COR, USA)
    Measurement height 28.5m
    Sampling frequency 10Hz (8Hz from 2002.2.6-2002.4.11)
    Averaging time 30min
    Data logger NR1000 (-2002.2.6, Keyence Co., Japan), CR10X (2002.2.6 - 2002.4.11, Campbell, USA), CR23X (2002.4.11-present, Campbell, USA)
    Data storage PC
    Original data (Raw data or statistics) Raw data

    Meteorology

    Observation items Levels / Depth Instrument
    Global solar radiation (incoming) 28 (m)
    11 (m)
    1 (m)
    CM-14 (Kipp & Zonen) or MR-40 (Eiko, Japan)
    MR-40 (Eiko, Japan)
    MS-401 (EIko, Japan)
    Global solar radiation (outgoing) 28 (m)
    11 (m)
    CM-14 (Kipp & Zonen) or MR-40 (Eiko, Japan)
    MR-40 (Eiko, Japan)
    Long-wave radiation (incoming) 28 (m)
    11 (m)
    PIR (Epply) or MR-40 (Eiko, Japan)
    MR-40 (Eiko, Japan)
    Long-wave radiation (outgoing) 28 (m)
    11 (m)
    PIR (Epply) or MR-40 (Eiko, Japan)
    MR-40 (Eiko, Japan)
    Net radiation - -
    PPFD (incoming) 28,16,14,10,1 (m) LI190 (LI-COR, USA), PAR01(Prede, Japan)
    PPFD (outgoing) 28 (m) LI190 (LI-COR, USA)
    Direct/diffuse radiation - -
    Direct/diffuse PPFD - -
    Air temperature 29, 20, 14, 10, 4, 1 (m) Platinum resistance thermometer (HMP35, HMP45, VAISALA, Finland)
    Humidity 29, 20, 14, 10, 4, 1 (m) Capacitive hygrometer (HMP35, HMP45, VAISALA, Finland)
    Soil temperature 0.02, 0.1 (m)
    0.02, 0.05, 0.1, 0.2, 0.3, 0.5, 1 (m)
    Thermistor (107, Campbell, USA)
    Thermistor (RT-11, RT-12, Espec Mic, Japan)
    Soil heat flux 0.01 (m) PRF-01 (prede, Japanj
    Soil water content 0.1, 0.2, 0.3, 0.5, 1 (m) Tensiometer (DIK3150, Daiki Rika, Japan)
    Wind speed 31, 29, 26, 22, 20, 18, 16.5, 14, 4 (m) 3-cups anemometer (Makino, Japan), anemometer with wind vane ( Campbell, USA), sonic anemometer thermometer ( DA600, KAIJO, Japan)
    Wind direction 29 (m) anemometer with wind vane ( Campbell, USA)
    Barometric pressure 29 (m) PTB210 (Vaisala, Finland)
    Precipitation 1 (m) Tipping bucket rain gauge (RT-5, Ikeda Keiki, japan)
    CO2 concentration 20, 14, 4, 1, 0.3 (m) Automated closed dynamic chamber system (HT-CL-PT311, Hydrotech, Japan) with a closed-path CO2/H2O analyzer (LI-7000 or LI-6262, LI-COR, USA)

    Other

    Soil respiration Continuously with automated closed dynamic chamber system Occasionally with manual closed dynamic chamber system
    Photosynthesis Occasionally with LI-6400 (Li-cor)
    Ecological Investigation DBH, Tree height