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

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 proceeding › Conference 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 language	English (US)
Title of host publication	Remote Sensing and Hydrology
Pages	215-218
Number of pages	4
State	Published - 2012
Externally published	Yes
Event	Remote Sensing and Hydrology Symposium - Jackson Hole, WY, United States Duration: Sep 27 2010 → Sep 30 2010

Publication series

Name	IAHS-AISH Publication
Volume	352
ISSN (Print)	0144-7815

Conference

Conference	Remote Sensing and Hydrology Symposium
Country/Territory	United States
City	Jackson Hole, WY
Period	9/27/10 → 9/30/10

Keywords

Eddy covariance
Lysimetry
Surface energy balance fluxes

ASJC Scopus subject areas

Earth and Planetary Sciences(all)

Cite this

Alfieri, J. G., Kustas, W. P., Prueger, J. H., Chavez, J. L., Evett, S. R., Neale, C. M. U., Anderson, M. C., Hipps, L. E., Copeland, K. S., Howell, T. A., French, A. N., Dulaney, W., & McKee, L. (2012). A comparison of the eddy covariance and lysimetry-based measurements of the surface energy fluxes during BEAREX08. In Remote Sensing and Hydrology (pp. 215-218). (IAHS-AISH Publication; Vol. 352).

A comparison of the eddy covariance and lysimetry-based measurements of the surface energy fluxes during BEAREX08. / Alfieri, Joseph G.; Kustas, William P.; Prueger, John H.; Chavez, Jose L.; Evett, Steven R.; Neale, Christopher M.U.; Anderson, Martha C.; Hipps, Lawrence E.; Copeland, Karen S.; Howell, Terry A.; French, Andrew N.; Dulaney, Wayne; McKee, Lynn.

Remote Sensing and Hydrology. 2012. p. 215-218 (IAHS-AISH Publication; Vol. 352).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Alfieri, JG, Kustas, WP, Prueger, JH, Chavez, JL, Evett, SR, Neale, CMU, Anderson, MC, Hipps, LE, Copeland, KS, Howell, TA, French, AN, Dulaney, W & McKee, L 2012, A comparison of the eddy covariance and lysimetry-based measurements of the surface energy fluxes during BEAREX08. in Remote Sensing and Hydrology. IAHS-AISH Publication, vol. 352, pp. 215-218, Remote Sensing and Hydrology Symposium, Jackson Hole, WY, United States, 9/27/10.

Alfieri, Joseph G. ; Kustas, William P. ; Prueger, John H. ; Chavez, Jose L. ; Evett, Steven R. ; Neale, Christopher M.U. ; Anderson, Martha C. ; Hipps, Lawrence E. ; Copeland, Karen S. ; Howell, Terry A. ; French, Andrew N. ; Dulaney, Wayne ; McKee, Lynn. / A comparison of the eddy covariance and lysimetry-based measurements of the surface energy fluxes during BEAREX08. Remote Sensing and Hydrology. 2012. pp. 215-218 (IAHS-AISH Publication).

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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.",

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

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AU - Chavez, Jose L.

AU - Evett, Steven R.

AU - Neale, Christopher M.U.

AU - Anderson, Martha C.

AU - Hipps, Lawrence E.

AU - Copeland, Karen S.

AU - Howell, Terry A.

AU - French, Andrew N.

AU - Dulaney, Wayne

AU - McKee, Lynn

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AB - 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.

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

Abstract

Publication series

Conference

Keywords

ASJC Scopus subject areas

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