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• W2013154303 endingPage "4863" @default.
• W2013154303 startingPage "4839" @default.
• W2013154303 abstract "Abstract. L. Zhang et al. (2012), in a recent report, compared model estimates with new observations of oxidized and particulate mercury species (Hg2+ and Hgp) in the Great Lakes region and found that the sum of Hg2+ and Hgp varied between a factor of 2 to 10 between measurements and model. They suggested too high emission inputs as Hg2+ and too fast oxidative conversion of Hg0 to Hg2+ and Hgp as possible causes. This study quantitatively explores measurement uncertainties in detail. These include sampling efficiency, composition of sample, interfering species and calibration errors. Model (Global/Regional Atmospheric Heavy Metals Model – GRAHM) sensitivity experiments are used to examine the consistency between various Hg measurements and speciation of Hg near emission sources to better understand the discrepancies between modelled and measured concentrations of Hg2+ and Hgp. We find that the ratio of Hg0, Hg2+ and Hgp in the emission inventories, measurements of surface air concentrations of oxidized Hg and measurements of wet deposition are currently inconsistent with each other in the vicinity of emission sources. Current speciation of Hg emissions suggests higher concentrations of Hg2+ in air and in precipitation near emission sources; however, measured air concentrations of Hg2+ and measured concentrations of Hg in precipitation are not found to be significantly elevated near emission sources compared to the remote regions. The averaged unbiased root mean square error (RMSE) between simulated and observed concentrations of Hg2+ is found to be reduced by 42% and for Hgp reduced by 40% for 21 North American sites investigated, when a ratio for Hg0 : Hg2+ : Hgp in the emissions is changed from 50 : 40 : 10 (as specified in the original inventories) to 90 : 8 : 2. Unbiased RMSE reductions near emissions sources in the eastern United States and Canada are found to be reduced by up to 58% for Hg2+. Significant improvement in the model simulated spatial distribution of wet deposition of mercury in North America is noticed with the modified Hg emission speciation. Measurement-related uncertainties leading to lower estimation of Hg2+ concentrations are 86%. Uncertainties yielding either to higher or lower Hg2+ concentrations are found to be 36%. Finally, anthropogenic emission uncertainties are 106% for Hg2+. Thus it appears that the identified uncertainties for model estimates related to mercury speciation near sources, uncertainties in measurement methodology and uncertainties in emissions can close the gap between modelled and observed estimates of oxidized mercury found in L. Zhang et al. (2012). Model sensitivity simulations show that the measured concentrations of oxidized mercury, in general, are too low to be consistent with measured wet deposition fluxes in North America. Better emission inventories (with respect to speciation), better techniques for measurements of oxidized species and knowledge of mercury reduction reactions in different environments (including in-plume) in all phases are needed for improving the mercury models." @default.
• W2013154303 created "2016-06-24" @default.
• W2013154303 creator A5026251507 @default.
• W2013154303 creator A5046394179 @default.
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• W2013154303 creator A5054862652 @default.
• W2013154303 creator A5058432864 @default.
• W2013154303 creator A5058615152 @default.
• W2013154303 creator A5061880834 @default.
• W2013154303 date "2013-05-14" @default.
• W2013154303 modified "2023-10-01" @default.
• W2013154303 title "Evaluation of discrepancy between measured and modelled oxidized mercury species" @default.
• W2013154303 cites W144874108 @default.
• W2013154303 cites W1514827352 @default.
• W2013154303 cites W189483233 @default.
• W2013154303 cites W1966950566 @default.
• W2013154303 cites W1968733385 @default.
• W2013154303 cites W1970990039 @default.
• W2013154303 cites W1971693459 @default.
• W2013154303 cites W1974576701 @default.
• W2013154303 cites W1976361607 @default.
• W2013154303 cites W1981621839 @default.
• W2013154303 cites W1983087287 @default.
• W2013154303 cites W1984466720 @default.
• W2013154303 cites W1984523046 @default.
• W2013154303 cites W1986227031 @default.
• W2013154303 cites W1987405156 @default.
• W2013154303 cites W1987969549 @default.
• W2013154303 cites W1988692277 @default.
• W2013154303 cites W1988846989 @default.
• W2013154303 cites W1989300302 @default.
• W2013154303 cites W1990731864 @default.
• W2013154303 cites W1994321957 @default.
• W2013154303 cites W1994658364 @default.
• W2013154303 cites W1996873734 @default.
• W2013154303 cites W1997756647 @default.
• W2013154303 cites W1997922101 @default.
• W2013154303 cites W1998898197 @default.
• W2013154303 cites W2001010126 @default.
• W2013154303 cites W2001222045 @default.
• W2013154303 cites W2001351643 @default.
• W2013154303 cites W2001389074 @default.
• W2013154303 cites W2002861022 @default.
• W2013154303 cites W2002938277 @default.
• W2013154303 cites W2004267106 @default.
• W2013154303 cites W2007205629 @default.
• W2013154303 cites W2009687030 @default.
• W2013154303 cites W2009692019 @default.
• W2013154303 cites W2009741608 @default.
• W2013154303 cites W2018962863 @default.
• W2013154303 cites W2019790084 @default.
• W2013154303 cites W2019943280 @default.
• W2013154303 cites W2022849060 @default.
• W2013154303 cites W2025151763 @default.
• W2013154303 cites W2025488113 @default.
• W2013154303 cites W2026967510 @default.
• W2013154303 cites W2031622454 @default.
• W2013154303 cites W2032876403 @default.
• W2013154303 cites W2033426986 @default.
• W2013154303 cites W2033502042 @default.
• W2013154303 cites W2033855312 @default.
• W2013154303 cites W2033987227 @default.
• W2013154303 cites W2036774213 @default.
• W2013154303 cites W2037135568 @default.
• W2013154303 cites W2039702955 @default.
• W2013154303 cites W2042092131 @default.
• W2013154303 cites W2050445358 @default.
• W2013154303 cites W2052824627 @default.
• W2013154303 cites W2055575437 @default.
• W2013154303 cites W2057528339 @default.
• W2013154303 cites W2058185723 @default.
• W2013154303 cites W2063995661 @default.
• W2013154303 cites W2068012376 @default.
• W2013154303 cites W2070090003 @default.
• W2013154303 cites W2070757384 @default.
• W2013154303 cites W2073642232 @default.
• W2013154303 cites W2074202773 @default.
• W2013154303 cites W2076646165 @default.
• W2013154303 cites W2077961836 @default.
• W2013154303 cites W2078997228 @default.
• W2013154303 cites W2081171907 @default.
• W2013154303 cites W2084341057 @default.
• W2013154303 cites W2084648648 @default.
• W2013154303 cites W2091707433 @default.
• W2013154303 cites W2091911080 @default.
• W2013154303 cites W2093523351 @default.
• W2013154303 cites W2095117336 @default.
• W2013154303 cites W2098910302 @default.
• W2013154303 cites W2104135312 @default.
• W2013154303 cites W2105614276 @default.
• W2013154303 cites W2109617704 @default.
• W2013154303 cites W2111624556 @default.
• W2013154303 cites W2112853880 @default.
• W2013154303 cites W2115963474 @default.
• W2013154303 cites W2117717745 @default.
• W2013154303 cites W2121086091 @default.
• W2013154303 cites W2134030726 @default.
• W2013154303 cites W2135222761 @default.

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