Atmos. Chem. Phys. Discuss., 13, 12771-12796, 2013
© Author(s) 2013. This work is distributed
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This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
Method development estimating ambient mercury concentration from monitored mercury wet deposition
S. M. Chen1, X. Qiu2, L. Zhang3, F. Yang2, and P. Blanchard3
1Department of Mathematics and Statistics, York University, Toronto, Canada
2Novus Environmental Inc., Toronto, Canada
3Air Quality Research Division, Science and Technology Branch, Environment Canada, Toronto, Canada

Abstract. Speciated atmospheric mercury data have recently been monitored at multiple locations in North America; but the spatial coverage is far less than the long-established mercury wet deposition network. The present study describes a first attempt linking ambient concentration with wet deposition using Beta distribution fitting of a ratio estimate. The mean, median, mode, standard deviation, and skewness of the fitted Beta distribution parameters were generated using data collected in 2009 at 11 monitoring stations. Comparing the normalized histogram and the fitted density function, the empirical and fitted Beta distribution of the ratio shows a close fit. The estimated ambient mercury concentration was further partitioned into reactive gaseous mercury and particulate bound mercury using linear regression model developed by Amos et al. (2012). The method presented here can be used to roughly estimate mercury ambient concentration at locations and/or times where such measurement is not available but where wet deposition is monitored.

Citation: Chen, S. M., Qiu, X., Zhang, L., Yang, F., and Blanchard, P.: Method development estimating ambient mercury concentration from monitored mercury wet deposition, Atmos. Chem. Phys. Discuss., 13, 12771-12796, doi:10.5194/acpd-13-12771-2013, 2013.
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