Error characterization of methane fluxes and budgets derived from a long-term comparison of open- and closed-path eddy covariance systems.

ABSTRACT: Wetlands represent the dominant natural source of methane (CH₄) to the atmosphere. Thus, substantial effort has been spent examining the CH₄ budgets of global wetlands via continuous ecosystem-scale measurements using the eddy covariance (EC) technique. Robust error characterization for such measurements, however, remains a major challenge. Here, we quantify systematic, random and gap-filling errors and the resulting uncertainty in CH₄ fluxes using a 3.5 year time series of simultaneous open- and closed path CH₄ flux measurements over a sub-boreal wetland. After correcting for high- and low frequency flux attenuation, the magnitude of systematic frequency response errors were negligible relative to other uncertainties. Based on three diffe

SUBMITTER: Deventer MJ 

PROVIDER: S-EPMC7894097 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature