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  • Measurement of horizontal and vertical advection of CO2 within a forest canopy

    Author(s)
    Leuning, Ray
    Zegelin, Steven J
    Jones, Kevin
    Keith, Heather
    Hughes, Dale
    Griffith University Author(s)
    Keith, Heather
    Year published
    2008
    Metadata
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    Abstract
    Eddy covariance measurements often underestimate the net exchange of CO2 between forest canopies and the atmosphere under stable atmospheric conditions, when horizontal and vertical advection are significant. A novel experimental design was used to measure all terms in the mass balance of CO2 in a 50 m × 50 m wide, 6 m tall control volume (CV) located on the floor of a 40 m tall Eucalyptus forest to examine the contributions of the eddy flux, the change in storage and the horizontal and vertical advection terms. Horizontal flux divergences between the four vertical walls of the CV were determined using perforated tubing ...
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    Eddy covariance measurements often underestimate the net exchange of CO2 between forest canopies and the atmosphere under stable atmospheric conditions, when horizontal and vertical advection are significant. A novel experimental design was used to measure all terms in the mass balance of CO2 in a 50 m × 50 m wide, 6 m tall control volume (CV) located on the floor of a 40 m tall Eucalyptus forest to examine the contributions of the eddy flux, the change in storage and the horizontal and vertical advection terms. Horizontal flux divergences between the four vertical walls of the CV were determined using perforated tubing arranged parallel to the ground to measure CO2 mixing ratios. The change in storage was calculated using CO2 concentration profiles measured in the centre of the CV. Vertical advection was calculated using these profiles, combined with vertical velocities,
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    Journal Title
    Agricultural and Forest Meteorology
    Volume
    148
    Issue
    11
    DOI
    https://doi.org/10.1016/j.agrformet.2008.06.006
    Publication URI
    http://hdl.handle.net/10072/408036
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    • Journal articles

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