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Eddy fluxes of CO2, water vapor, and sensible heat over a deciduous forest

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Abstract

Fluxes of CO2, latent heat and sensible heat were measured above a fully-leafed deciduous forest in eastern Tennessee with the eddy correlation technique. These are among the first reported observations over such a surface. The influences of solar radiation, vapor pressure deficit and the aerodynamic and canopy resistances on these mass and energy exchanges are examined. Following a concept introduced by McNaughton and Jarvis (1983), examination of our data suggest that the water vapor exchange of a deciduous forest is not as strongly coupled with net radiation as is that of agricultural crops. The degree of decoupling is smaller than in the case of a coniferous forest. This difference may be attributable in part to the greater aerodynamic resistance to water vapor transfer in a deciduous forest. It appears that the concept of decoupling may be extended to the CO2 exchange of a deciduous forest as well.

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Authors and Affiliations

  1. Center for Agricultural Meteorology and Climatology, University of Nebraska, 68583-0728, Lincoln, USA

    Shashi B. Verma, Dennis D. Baldocchi, Dean E. Anderson, Detlef R. Matt & Robert J. Clement

  2. Atmospheric Turbulence and Diffusion Division/NOAA/ARL, P.O. Box E, 37831, Oak Ridge, TN, USA

    Shashi B. Verma, Dennis D. Baldocchi, Dean E. Anderson, Detlef R. Matt & Robert J. Clement

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  1. Shashi B. Verma
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  2. Dennis D. Baldocchi
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  3. Dean E. Anderson
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  4. Detlef R. Matt
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  5. Robert J. Clement
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Additional information

Published as Paper No. 7832, Journal Series, Nebraska Agricultural Research Division. ATDD Contribution No. 85-17.

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Verma, S.B., Baldocchi, D.D., Anderson, D.E. et al. Eddy fluxes of CO2, water vapor, and sensible heat over a deciduous forest. Boundary-Layer Meteorol 36, 71–91 (1986). https://doi.org/10.1007/BF00117459

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