A comparison of the eddy covariance and lysimetry-based measurements of the surface energy fluxes during BEAREX08

Joseph G. Alfieri, William P. Kustas, John H. Prueger, Jose L. Chavez, Steven R. Evett, Christopher M.U. Neale, Martha C. Anderson, Lawrence E. Hipps, Karen S. Copeland, Terry A. Howell, Andrew N. French, Wayne Dulaney, Lynn McKee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Understanding the uncertainty associated with ground truth data is critical for accurately assessing remote sensing-based products and models. Using data collected with eddy covariance systems and lysimetry during the 2008 Bushland Evapotranspiration and Agricultural Remote Sensing Experiment (BEAREX08), this research sought to characterize surface energy flux measurements collected over irrigated cotton under strongly advective conditions. The results of the analysis showed substantial differences between the flux measurements, with the lysimetry-based latent heat fluxes exceeding those of the eddy covariance measurements by as much as 400 W m-2. The differences between the non-turbulent fluxes were smaller, typically on the order of 100 W m -2. Even after forcing closure of the eddy covariance data, it was not possible to reconcile the measurements. Although differences in local surface conditions were found among the measurement sites, the cause for the discrepancies between the measurements from the two methods remains unclear. It is the focus of ongoing research.

Original languageEnglish (US)
Title of host publicationRemote Sensing and Hydrology
Pages215-218
Number of pages4
StatePublished - 2012
Externally publishedYes
EventRemote Sensing and Hydrology Symposium - Jackson Hole, WY, United States
Duration: Sep 27 2010Sep 30 2010

Publication series

NameIAHS-AISH Publication
Volume352
ISSN (Print)0144-7815

Conference

ConferenceRemote Sensing and Hydrology Symposium
Country/TerritoryUnited States
CityJackson Hole, WY
Period9/27/109/30/10

Keywords

  • Eddy covariance
  • Lysimetry
  • Surface energy balance fluxes

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

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