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Consequences of Incomplete Surface Energy Balance Closure for CO_2 Fluxes from Open-Path CO_2/H_2O Infrared Gas Analysers

Liu, Heping and Randerson, James T. and Lindfors, Jamie and Massman, William J. and Foken, Thomas (2006) Consequences of Incomplete Surface Energy Balance Closure for CO_2 Fluxes from Open-Path CO_2/H_2O Infrared Gas Analysers. Boundary-Layer Meteorology, 120 (1). pp. 65-85. ISSN 0006-8314. doi:10.1007/s10546-005-9047-z.

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We present an approach for assessing the impact of systematic biases in measured energy fluxes on CO_2 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 CO_2 flux measurements. Our results suggest that incomplete energy balance closure does not necessarily lead to an underestimation of CO_2 fluxes despite the existence of surface energy imbalance; either an overestimation or underestimation of CO_2 fluxes is possible depending on local atmospheric conditions and measurement errors in the sensible heat, latent heat, and CO_2 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 CO_2 fluxes.

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Randerson, James T.0000-0001-6559-7387
Alternate Title:Consequences of Incomplete Surface Energy Balance Closure for CO2 Fluxes from Open-Path CO2/H2O Infrared Gas Analysers
Additional Information:© 2006 Springer. Received in final form 21 December 2005 / Published online: 7 July 2006. This work was supported by NSF grants OPP-0097439. We are grateful for insightful and useful comments from the three referees.
Funding AgencyGrant Number
Subject Keywords:Carbon dioxide flux; Eddy covariance; Error analysis; Open-path CO2/H2O infrared gas analysers (IRGA); Surface energy imbalance; WPL algorithm
Issue or Number:1
Record Number:CaltechAUTHORS:20191011-091358305
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Official Citation:Liu, H., Randerson, J.T., Lindfors, J. et al. Boundary-Layer Meteorol (2006) 120: 65.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99234
Deposited By: Tony Diaz
Deposited On:11 Oct 2019 16:53
Last Modified:16 Nov 2021 17:44

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