The Energy Balance Experiment EBEX-2000. Part I: Overview and energy balance

An overview of the Energy Balance Experiment (EBEX-2000) is given. This experiment studied the ability of state-of-the-art measurements to close the surface energy balance over a surface (a vegetative canopy with large evapotranspiration) where closure has been difficult to obtain. A flood-irrigated cotton field over uniform terrain was used, though aerial imagery and direct flux measurements showed that the surface still was inhomogeneous. All major terms of the surface energy balance were measured at nine sites to characterize the spatial variability across the field. Included in these observations was an estimate of heat storage in the plant canopy. The resultant imbalance still was 10%, which exceeds the estimated measurement error. We speculate that horizontal advection in the layer between the canopy top and our flux measurement height may cause this imbalance, though our estimates of this term using our measurements resulted in values less than what would be required to balance the budget.

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Copyright 2007, Springer Science+Business Media, B.V.

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Author Oncley, Steven
Foken, Thomas
Vog, Roland
Kohsiek, Wim
DeBruin, H.
Bernhofer, Christian
Christen, Andreas
Van Gorsel, Eva
Grantz, David
Feigenwinter, Christian
Lehner, Irene
Leibethal, Claudia
Liu, Heping
Mauder, Matthias
Pitacco, Andrea
Riberio, Luis
Weidinger, Tamas
Publisher UCAR/NCAR - Library
Publication Date 2007-03-17T00:00:00
Digital Object Identifier (DOI) Not Assigned
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Topic Category geoscientificInformation
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Metadata Date 2023-08-18T18:38:29.714399
Metadata Record Identifier edu.ucar.opensky::articles:8878
Metadata Language eng; USA
Suggested Citation Oncley, Steven, Foken, Thomas, Vog, Roland, Kohsiek, Wim, DeBruin, H., Bernhofer, Christian, Christen, Andreas, Van Gorsel, Eva, Grantz, David, Feigenwinter, Christian, Lehner, Irene, Leibethal, Claudia, Liu, Heping, Mauder, Matthias, Pitacco, Andrea, Riberio, Luis, Weidinger, Tamas. (2007). The Energy Balance Experiment EBEX-2000. Part I: Overview and energy balance. UCAR/NCAR - Library. Accessed 04 October 2023.

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