Journal article
Consequences of Incomplete Surface Energy Balance Closure for CO2 Fluxes from Open-Path CO2/H2O Infrared Gas Analysers
Boundary-layer meteorology, Vol.120(1), pp.65-85
07/2006
Handle:
https://hdl.handle.net/2376/108965
Abstract
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 analyse 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 an 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 in the sensible heat, latent heat, and CO2 fluxes. We use open-path eddy-covariance fluxes measured over a black spruce forest in interior Alaska to explore several energy imbalance scenarios and their consequences for CO2 fluxes.
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Details
- Title
- Consequences of Incomplete Surface Energy Balance Closure for CO2 Fluxes from Open-Path CO2/H2O Infrared Gas Analysers
- Creators
- Heping Liu - Department of Physics Atmospheric Sciences and General Science 7 Jackson State University P.O. Box 17660 Jackson MS 39217 U.S.AJames Randerson - Department of Earth System Science University of California 3212 Croul Hall Irvine CA 92697 U.S.AJamie Lindfors - Division of Geological and Planetary Sciences California Institute of Technology Pasadena CA 91125 U.S.AWilliam Massman - Rocky Mountain Research Station USDA – Forest Service 240 West Prospect Fort Collins CO 80526 U.S.AThomas Foken - Department of Micrometeorology University of Bayreuth D-95440 Bayreuth Germany
- Publication Details
- Boundary-layer meteorology, Vol.120(1), pp.65-85
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- Kluwer Academic Publishers; Dordrecht
- Identifiers
- 99900547065401842
- Language
- English
- Resource Type
- Journal article