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Consequences of incomplete surface energy balance closure for CO₂ fluxes from open-path CO₂/H₂O infrared gas analyzers

Title data

Liu, Heping ; Randerson, James T. ; Lindfors, Jamie ; Massman, William J. ; Foken, Thomas:
Consequences of incomplete surface energy balance closure for CO₂ fluxes from open-path CO₂/H₂O infrared gas analyzers.
In: Boundary-Layer Meteorology. Vol. 120 (July 2006) Issue 1 . - pp. 65-85.
ISSN 1573-1472
DOI: https://doi.org/10.1007/s10546-005-9047-z

Abstract in another language

We present an approach for assessing the impact of systematic biases in measured energy fluxes on CO₂ flux estimates obtained from open-path eddy covariance systems. In our analysis, we present equations to analyze the propagation of errors through the Webb, Pearman, and Leuning (WPL) algorithm (Quart. J. Roy. Meteorol. Soc., 106, 85-100, 1980) that is widely used to account for density fluctuations on CO₂ flux measurements. Our results suggest that incomplete energy balance closure does not necessarily lead to underestimation of CO₂ fluxes despite the existence of surface energy imbalance; either an overestimation or underestimation of CO₂ fluxes is possible depending on local atmospheric conditions and measurement errors of the kinematic heat, moisture, and CO₂ fluxes. We use open-path eddy covariance fluxes measured over a black spruce forest near Delta Junction in interior Alaska in the 2002 summer growing season to explore several energy imbalance scenarios and their consequences for CO₂ fluxes.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER35064
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Professorship Micrometeorology - Univ.-Prof. Dr. Thomas Foken
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 11 Sep 2015 06:33
Last Modified: 11 Sep 2015 06:33
URI: https://eref.uni-bayreuth.de/id/eprint/19149