Articles | Volume 15, issue 10
https://doi.org/10.5194/acp-15-5359-2015
https://doi.org/10.5194/acp-15-5359-2015
Research article
 | 
18 May 2015
Research article |  | 18 May 2015

Mercury vapor air–surface exchange measured by collocated micrometeorological and enclosure methods – Part II: Bias and uncertainty analysis

W. Zhu, J. Sommar, C.-J. Lin, and X. Feng

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Cited articles

Ammann, C.: On the Applicability of Relaxed Eddy Accumulation and Common Methods for Measuring Trace Gas Surface Fluxes, Ph. D. thesis, ETH, Zürich, 239 pp., 1998.
Ammann, C. and Meixner, F. X.: Stability dependence of the relaxed eddy accumulation coefficient for various scalar quantities, J. Geophys. Res.-Atmos., 107, 4071, https://doi.org/10.1029/2001JD000649, 2002.
Aubinet, M., Vesala, T., and Papale, D.: Eddy covariance: a Practical Guide to Measurement and Data Analysis, Springer, Dordrecht, the Netherlands, 2012.
Arnts, R. R., Mowry, F. L., and Hampton, G. A.: A high-frequency response relaxed eddy accumulation flux measurement system for sampling short-lived biogenic volatile organic compounds, J. Geophys. Res.-Atmos., 118, 4860–4873, https://doi.org/10.1002/jgrd.50215, 2013.
Baker, J. M., Norman, J. M., and Bland, W. L.: Field-Scale Application of Flux Measurement by Conditional Sampling, Agr. Forest Meteorol., 62, 31–52, https://doi.org/10.1016/0168-1923(92)90004-N, 1992.
Short summary
Bias and uncertainty in Hg flux measured by micrometeorological methods (MM) and dynamic flux chambers (DFCs) are assessed from two field inter-comparison campaigns. DFC flux bias follows a diurnal cycle due to modified temperature and radiation balance inside the chamber. The precision in concentration difference measurements poses critical constraint on obtaining a larger fraction of significant MM flux. Asynchronous sampling impairs flux accuracy under varying atmospheric Hg concentration.
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