[QHB]
Qinghai Flux Research Site
  • Site Description
  • Observation
  • Researchers
  • Note

    • Eddy Correlation Method

    System Open-path system (CO2 and latent heat fluxes)
    Wind speed Three-dimensional sonic anemometer thermometer (CSAT-3, Campbell)
    Air temperature Three-dimensional sonic anemometer thermometer (CSAT-3, Campbell)
    Water Vapor Open-path CO2/H2O analyzer (LI-7500, LI-COR)
    CO2 Open-path CO2/H2O analyzer (LI-7500, LI-COR)
    Measurement height 2.2 m
    Sampling frequency 10Hz
    Averaging time 15 min
    Data logger Digital micrologger (CR-5000, CR23X, Campbell)
    Data storage Compact Flash Disk
    Original data (Raw data or statistics) Statistics

    Meteorology

    Observation items Levels / Depth Instrument
    Global solar radiation (incoming) 1.5 m Net radiometer (CNR-1, Kipp & Zonen, Netherlands)
    Global solar radiation (outgoing) 1.5 m Net radiometer (CNR-1, Kipp & Zonen)
    Long-wave radiation (incoming) 1.5 m Net radiometer (CNR-1, Kipp & Zonen)
    Long-wave radiation (outgoing) 1.5 m Net radiometer (CNR-1, Kipp & Zonen)
    Net radiation 1.5 m Net radiometer (CNR-1, Kipp & Zonen)
    PPFD (incoming) 1.5 m Quantum sensor (LI-190SB, LI-COR, USA)
    PPFD (outgoing) 1.5 m Quantum sensor (LI-190SB, LI-COR)
    Direct/diffuse radiation 1.5 m CPR-CH1 (CPR-PHSX100, Japan)
    Direct/diffuse PPFD - -
    Air temperature 2.2, 1.1 m Humidity and temperature probe (HMP45C, Vaisala, Finland)
    Humidity 2.2, 1.1 m Humidity and temperature probe (HMP45C, Vaisala)
    Soil temperature 0.02, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, and 0.7 m Copper-constantan thermocouple
    Soil heat flux 0.02 m Heat flux plate (HFT-3, Campbell, USA)
    Soil water content 0.05, 0.2, 0.5 m Time-domain reflectometry sensor (CS-615, Campbell)
    Wind speed 2.2, 1.1 m Cup anemometer (034A-L and 014A, R. M. Young, USA)
    Wind direction 2.2 m Sonic anemometer (CSAT-3, Campbell)
    Barometric pressure 2.2m Open-path CO2/H2O analyzer (LI-7500, LI-COR)
    Precipitation 0.7 m Tipping bucket rain gage (TE525MM, CSL, USA)
    CO2 concentration 2.2 m Open-path analyzer (LI-7500, LI-COR)

    Other

    Soil respiration Chamber method (in 2002)
    Photosynthesis Automatic Chamber System (2006-
    Ecological Investigation Biomass measurements (2001-2003)