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<front>
<journal-meta>
<journal-id journal-id-type="publisher">ACP</journal-id>
<journal-title-group>
<journal-title>Atmospheric Chemistry and Physics</journal-title>
<abbrev-journal-title abbrev-type="publisher">ACP</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1680-7324</issn>
<publisher><publisher-name>Copernicus GmbH</publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/acp-9-207-2009</article-id>
<title-group>
<article-title>In situ measurements of speciated atmospheric mercury and the identification of source regions in the Mexico City Metropolitan Area</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Rutter</surname>
<given-names>A. P.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Snyder</surname>
<given-names>D. C.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Stone</surname>
<given-names>E. A.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Schauer</surname>
<given-names>J. J.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Gonzalez-Abraham</surname>
<given-names>R.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Molina</surname>
<given-names>L. T.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
<xref ref-type="aff" rid="aff4">
<sup>4</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Márquez</surname>
<given-names>C.</given-names>
</name>
<xref ref-type="aff" rid="aff5">
<sup>5</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Cárdenas</surname>
<given-names>B.</given-names>
</name>
<xref ref-type="aff" rid="aff5">
<sup>5</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>de Foy</surname>
<given-names>B.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
<xref ref-type="aff" rid="aff6">
<sup>6</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Environmental Chemistry and Technology Program, Univ. of Wisconsin, 660 N. Park Street, Madison, WI 53706, USA</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Wisconsin State Laboratory of Hygiene, Univ. of Wisconsin, 2601 Agriculture Drive, Madison, WI 53718, USA</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>Molina Center for Energy and the Environment 2, 3262 Holiday Ct. Suite 201, La Jolla, CA 92037, USA</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>Massachusetts Institute of Technology, Cambridge, MA 02319, USA</addr-line>
</aff>
<aff id="aff5">
<label>5</label>
<addr-line>Centro Nacional de Investigación y Capacitación Ambiental CENICA, Instituto Nacional de Ecología-SEMARNAT., Periférico 5000, Mexico City, 04530, Mexico</addr-line>
</aff>
<aff id="aff6">
<label>6</label>
<addr-line>Department of Earth and Atmospheric Sciences, Saint Louis University, 3642 Lindell Blvd., St. Louis, MO 63108, USA</addr-line>
</aff>
<pub-date pub-type="epub">
<day>13</day>
<month>01</month>
<year>2009</year>
</pub-date>
<volume>9</volume>
<issue>1</issue>
<fpage>207</fpage>
<lpage>220</lpage>
<permissions>
<license xlink:type="simple">
<license-p>This is an open-access article ditributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.</license-p>
</license>
</permissions>
<self-uri xlink:href="http://www.atmos-chem-phys.net/9/207/2009/acp-9-207-2009.html">This article is available from http://www.atmos-chem-phys.net/9/207/2009/acp-9-207-2009.html</self-uri>
<self-uri xlink:href="http://www.atmos-chem-phys.net/9/207/2009/acp-9-207-2009.pdf">The full text article is available as a PDF file from http://www.atmos-chem-phys.net/9/207/2009/acp-9-207-2009.pdf</self-uri>
<abstract>
<p>In order to expand the currently limited understanding of atmospheric
mercury source-receptor relationships in the Mexico City Metropolitan Area,
real time measurements of atmospheric mercury were made at a downtown urban
site, and a rural site on the outskirts of Mexico City, during March 2006.
&lt;br&gt;&lt;br&gt;
Numerous short-lived increases in particulate mercury (PHg) and reactive
gaseous mercury (RGM) concentrations were observed at the urban site during
the 17 day study, and less frequent increases in gaseous elemental mercury
(GEM) concentrations were measured at both the urban and rural sites. The
episodic increases observed were attributed to plume impacts from industrial
point source emissions in and around Mexico City. Average concentrations and
standard deviations measured during the study were as follows: i) urban
site; PHg=187&amp;plusmn;300 pg m&lt;sup&gt;&amp;minus;3&lt;/sup&gt;, RGM=62&amp;plusmn;64 pg m&lt;sup&gt;&amp;minus;3&lt;/sup&gt;, GEM=7.2&amp;plusmn;4.8 ng m&lt;sup&gt;&amp;minus;3&lt;/sup&gt;,
and; ii) rural site; GEM=5.0&amp;plusmn;2.8 ng m&lt;sup&gt;&amp;minus;3&lt;/sup&gt;.
&lt;br&gt;&lt;br&gt;
Several source regions of atmospheric mercury to the urban and rural sites
were determined using Concentration Field Analysis, in which atmospheric
mercury measurements were combined with back trajectory data to
determine source regions. Only some source regions correlated to mercury emission
sources listed in the Federal Pollutant Release and Transfer Register,
leaving the rest unaccounted for. Contributions of anthropogenic mercury
point sources in and around Mexico City to concentration averages measured
at the urban site during the study were estimated to be: 93&amp;plusmn;3% of
reactive mercury (PHg and RGM), and; 81&amp;plusmn;0.4% of GEM. Point source
contributions to GEM measured at the rural site were 72&amp;plusmn;1%. GEM
and reactive mercury (PHg+RGM) were not found to correlate with biomass
burning at either of the measurement sites.</p>
</abstract>
<counts><page-count count="14"/></counts>
</article-meta>
</front>
<body/>
<back>
<ref-list>
<title>References</title>
<ref id="ref1">
<label>1</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Bagnato, E., Aiuppa, A., Parello, F., Calabrese, S., D&apos;Alessandro, W., Mather, T. A., McGonigle, A. J. S., Pyle, D. M., and Wangberg, I.: Degassing of gaseous (elemental and reactive) and particulate mercury from Mount Etna volcano (Southern Italy), Atmos. Environ., 41, 7377–7388, 2007. </mixed-citation>
</ref>
<ref id="ref2">
<label>2</label><mixed-citation publication-type="other" xlink:type="simple"> Biswas, A., Blum, J. D., Klaue, B., and Keeler, G. J.: Release of mercury from Rocky Mountain forest fires, Global Biogeochem. Cy., 21, GB1002, doi:10.1029/2006GB002696, 2007. </mixed-citation>
</ref>
<ref id="ref3">
<label>3</label><mixed-citation publication-type="other" xlink:type="simple"> Chow, J. C., Watson, J. G., Edgerton, S. A., and Vega, E.: Chemical composition of PM2.5 and PM10 in Mexico City during winter 1997, Sci. Total Environ., 287, 177–201, 2002. </mixed-citation>
</ref>
<ref id="ref4">
<label>4</label><mixed-citation publication-type="other" xlink:type="simple"> Cinnirella, S. and Pirrone, N.: Spatial and temporal distributions of mercury emissions from forest fires in Mediterranean region and Russian federation, Atmos. Environ., 40, 7346–7361, 2006. </mixed-citation>
</ref>
<ref id="ref5">
<label>5</label><mixed-citation publication-type="other" xlink:type="simple"> Clarkson, T. W.: Mercury – Major Issues in Environmental-Health, Environ. Health Persp., 100, 31–38, 1993. </mixed-citation>
</ref>
<ref id="ref6">
<label>6</label><mixed-citation publication-type="other" xlink:type="simple"> de Foy, B., Lei, W., Zavala, M., Volkamer, R., Samuelsson, J., Mellqvist, J., Galle, B., Mart\&apos;inez, A.-P., Grutter, M., Retama, A., and Molina, L. T.: Modelling constraints on the emission inventory and on vertical dispersion for CO and SO&lt;sub&gt;2&lt;/sub&gt; in the Mexico City Metropolitan Area using Solar FTIR and zenith sky UV spectroscopy, Atmos. Chem. Phys., 7, 781–801, 2007. </mixed-citation>
</ref>
<ref id="ref7">
<label>7</label><mixed-citation publication-type="other" xlink:type="simple"> de Foy, B., Fast, J. D., Paech, S. J., Phillips, D., Walters, J. T., Coulter, R. L., Martin, T. J., Pekour, M. S., Shaw, W. J., Kastendeuch, P. P., Marley, N. A., Retama, A., and Molina, L. T.: Basin-scale wind transport during the MILAGRO field campaign and comparison to climatology using cluster analysis, Atmos. Chem. Phys., 8, 1209–1224, 2008. </mixed-citation>
</ref>
<ref id="ref8">
<label>8</label><mixed-citation publication-type="other" xlink:type="simple"> de la Rosa, D. A., Volke-Sepulveda, T., Solorzano, G., Green, C., Tordon, R., and Beauchamp, S.: Survey of atmospheric total gaseous mercury in Mexico, Atmos. Environ., 38, 4839–4846, 2004. </mixed-citation>
</ref>
<ref id="ref9">
<label>9</label><mixed-citation publication-type="other" xlink:type="simple"> Denis, M. S., Song, X. J., Lu, J. Y., and Feng, X. B.: Atmospheric gaseous elemental mercury in downtown Toronto, Atmos. Environ., 40, 4016–4024, 2006. </mixed-citation>
</ref>
<ref id="ref10">
<label>10</label><mixed-citation publication-type="other" xlink:type="simple"> Dommergue, A., Ferrari, C. P., Planchon, F. A. M., and Boutron, C. F.: Influence of anthropogenic sources on total gaseous mercury variability in grenoble suburban air (France), Sci. Total Environ., 297, 203–213, 2002. </mixed-citation>
</ref>
<ref id="ref11">
<label>11</label><mixed-citation publication-type="other" xlink:type="simple"> Ebinghaus, R., Kock, H. H., Coggins, A. M., Spain, T. G., Jennings, S. G., and Temme, C.: Long-term measurements of atmospheric mercury at Mace Head, Irish west coast, between 1995 and 2001, Atmos. Environ., 36, 5267–5276, 2002. </mixed-citation>
</ref>
<ref id="ref12">
<label>12</label><mixed-citation publication-type="other" xlink:type="simple"> Ebinghaus, R., Slemr, F., Brenninkmeijer, C. A. M., van Velthoven, P., Zahn, A., Hermann, M., O&apos;Sullivan, D. A., and Oram, D. E.: Emissions of gaseous mercury from biomass burning in South America in 2005 observed during CARIBIC flights, Geophys. Res. Lett., 34, L08813, doi:10.1029/2006GL028866, 2007. </mixed-citation>
</ref>
<ref id="ref13">
<label>13</label><mixed-citation publication-type="other" xlink:type="simple"> Fast, J. D., de Foy, B., Acevedo Rosas, F., Caetano, E., Carmichael, G., Emmons, L., McKenna, D., Mena, M., Skamarock, W., Tie, X., Coulter, R. L., Barnard, J. C., Wiedinmyer, C., and Madronich, S.: A meteorological overview of the MILAGRO field campaigns, Atmos. Chem. Phys., 7, 2233–2257, 2007. </mixed-citation>
</ref>
<ref id="ref14">
<label>14</label><mixed-citation publication-type="other" xlink:type="simple"> Fitzgerald, W. F. and Gill, G. A.: Sub-Nanogram Determination of Mercury by 2-Stage Gold Amalgamation and Gas-Phase Detection Applied to Atmospheric Analysis, Anal. Chem., 51, 1714–1720, 1979. </mixed-citation>
</ref>
<ref id="ref15">
<label>15</label><mixed-citation publication-type="other" xlink:type="simple"> Fraser, M. P. and Lakshmanan, K.: Using levoglucosan as a molecular marker for the long-range transport of biomass combustion aerosols, Environ. Sci. Technol., 34, 4560–4564, 2000. </mixed-citation>
</ref>
<ref id="ref16">
<label>16</label><mixed-citation publication-type="other" xlink:type="simple"> Friedli, H. R., Radke, L. F., Lu, J. Y., Banic, C. M., Leaitch, W. R., and MacPherson, J. I.: Mercury emissions from burning of biomass from temperate North American forests: laboratory and airborne measurements, Atmos. Environ., 37, 253–267, 2003. </mixed-citation>
</ref>
<ref id="ref17">
<label>17</label><mixed-citation publication-type="other" xlink:type="simple"> Friedli, H. R., Radke, L. F., Prescott, R., Li, P., Woo, J. H., and Carmichael, G. R.: Mercury in the atmosphere around Japan, Korea, and China as observed during the 2001 ACE-Asia field campaign: Measurements, distributions, sources, and implications, J. Geophys. Res.-Atmos., 109, D19S25, doi:10.1029/2003JD004244, 2004. </mixed-citation>
</ref>
<ref id="ref18">
<label>18</label><mixed-citation publication-type="other" xlink:type="simple"> Friedli, H. R., Radke, L. F., Payne, N. J., McRae, D. J., Lynham, T. J., and Blake, T. W.: Mercury in vegetation and organic soil at an upland boreal forest site in Prince Albert National Park, Saskatchewan, Canada, J. Geophys. Res.-Biogeosciences, 112, G01004, doi:10.1029/2005JG000061, 2007. </mixed-citation>
</ref>
<ref id="ref19">
<label>19</label><mixed-citation publication-type="other" xlink:type="simple"> Gabriel, M. C., Williamson, D. G., Brooks, S., and Lindberg, S.: Atmospheric speciation of Southeastern mercury in two contrasting US airsheds, Atmos. Environ., 39, 4947–4958, 2005. </mixed-citation>
</ref>
<ref id="ref20">
<label>20</label><mixed-citation publication-type="other" xlink:type="simple"> Hall, B. D., Olson, M. L., Rutter, A. P., Frontiera, R. R., Krabbenhoft, D. P., Gross, D. S., Yuen, M., Rudolph, T. M., and Schauer, J. J.: Atmospheric mercury speciation in Yellowstone National Park, Sci. Total Environ., 367, 354–366, 2006. </mixed-citation>
</ref>
<ref id="ref21">
<label>21</label><mixed-citation publication-type="other" xlink:type="simple"> Jensen, S. and Jernelov, A.: Biological Methylation of Mercury in Aquatic Organisms, Nature, 223, 753–754, 1969. </mixed-citation>
</ref>
<ref id="ref22">
<label>22</label><mixed-citation publication-type="other" xlink:type="simple"> Kainz, M., Telmer, K., and Mazumder, A.: Bioaccumulation patterns of methyl mercury and essential fatty acids in lacustrine planktonic food webs and fish, Sci. Total Environ., 368, 271–282, 2006. </mixed-citation>
</ref>
<ref id="ref23">
<label>23</label><mixed-citation publication-type="other" xlink:type="simple"> Kim, K. H., Ebinghaus, R., Schroeder, W. H., Blanchard, P., Kock, H. H., Steffen, A., Froude, F. A., Kim, M. Y., Hong, S. M., and Kim, J. H.: Atmospheric mercury concentrations from several observatory sites in the northern hemisphere, J. Atmos. Chem., 50, 1–24, 2005. </mixed-citation>
</ref>
<ref id="ref24">
<label>24</label><mixed-citation publication-type="other" xlink:type="simple"> Landis, M. S., Stevens, R. K., Schaedlich, F., and Prestbo, E. M.: Development and characterization of an annular denuder methodology for the measurement of divalent inorganic reactive gaseous mercury in ambient air, Environ. Sci. Technol., 36, 3000–3009, 2002a. </mixed-citation>
</ref>
<ref id="ref25">
<label>25</label><mixed-citation publication-type="other" xlink:type="simple"> Landis, M. S., Vette, A. F., and Keeler, G. J.: Atmospheric mercury in the Lake Michigan basin: Influence of the Chicago/Gary urban area, Environ. Sci. Technol., 36, 4508–4517, 2002b. </mixed-citation>
</ref>
<ref id="ref26">
<label>26</label><mixed-citation publication-type="other" xlink:type="simple"> Lin, C. J. and Pehkonen, S. O.: The chemistry of atmospheric mercury: a review, Atmos. Environ., 33, 2067–2079, 1999. </mixed-citation>
</ref>
<ref id="ref27">
<label>27</label><mixed-citation publication-type="other" xlink:type="simple"> Liu, S. L., Nadim, F., Perkins, C., Carley, R. J., Hoag, G. E., Lin, Y. H., and Chen, L. T.: Atmospheric mercury monitoring survey in Beijing, China, Chemosphere, 48, 97–107, 2002. </mixed-citation>
</ref>
<ref id="ref28">
<label>28</label><mixed-citation publication-type="other" xlink:type="simple"> Lu, J. Y., Schroeder, W. H., Berg, T., Munthe, J., Schneeberger, D., and Schaedlich, F.: A device for sampling and determination of total particulate mercury in ambient air, Anal. Chem., 70, 2403–2408, 1998. </mixed-citation>
</ref>
<ref id="ref29">
<label>29</label><mixed-citation publication-type="other" xlink:type="simple"> Lynam, M. M. and Keeler, G. J.: Comparison of methods for particulate phase mercury analysis: sampling and analysis, Anal. Bioanal. Chem., 374, 1009–1014, 2002. </mixed-citation>
</ref>
<ref id="ref30">
<label>30</label><mixed-citation publication-type="other" xlink:type="simple"> Lynam, M. M. and Keeler, G. J.: Automated speciated mercury measurements in Michigan, Environ. Sci. Technol., 39, 9253–9262, 2005. </mixed-citation>
</ref>
<ref id="ref31">
<label>31</label><mixed-citation publication-type="other" xlink:type="simple"> Lynam, M. M. and Keeler, G. J.: Source-receptor relationships for atmospheric mercury in urban Detroit, Michigan, Atmos. Environ., 40, 3144–3155, 2006. </mixed-citation>
</ref>
<ref id="ref32">
<label>32</label><mixed-citation publication-type="other" xlink:type="simple"> Manolopoulos, H., Schauer, J. J., Purcell, M. D., Rudolph, T. M., Olson, M. L., Rodger, B., and Krabbenhoft, D. P.: Local and regional factors affecting atmospheric mercury speciation at a remote location, J. Environ. Eng. Sci., 6, 491–501, doi:10.1139/s07-005, 2007. </mixed-citation>
</ref>
<ref id="ref33">
<label>33</label><mixed-citation publication-type="other" xlink:type="simple"> Manolopoulos, H., Snyder, D. C., Schauer, J. J., Turner, J. R., Olson, M. L., and Krabbenhoft, D. P.: Sources of Speciated Atmospheric Mercury at a Residential Neighbourhood Impacted by Industrial Sources, Environ. Sci. Technol., 40, 5626–5633, 2006. </mixed-citation>
</ref>
<ref id="ref34">
<label>34</label><mixed-citation publication-type="other" xlink:type="simple"> Michalakes, J., Dudhia, J., Gill, D., Klemp, J., and Skamarock, W.: Design of a next-generation regional weather research and forecast model: Towards Teracomputing, World Scientific, River Edge, New Jersey, 117–124, 1998. </mixed-citation>
</ref>
<ref id="ref35">
<label>35</label><mixed-citation publication-type="other" xlink:type="simple"> Moffet, R. C., de Foy, B., Molina, L. T., Molina, M. J., and Prather, K. A.: Measurement of ambient aerosols in northern Mexico City by single particle mass spectrometry, Atmos. Chem. Phys., 8, 4499–4516, 2008. </mixed-citation>
</ref>
<ref id="ref36">
<label>36</label><mixed-citation publication-type="other" xlink:type="simple"> Molina, L. T. and Molina, M. J. E.: Air Quality in the Mexico Megacity: An Integrated Assessment, Kluwer Academic Publishers, Boston, MA, USA, 2002. </mixed-citation>
</ref>
<ref id="ref37">
<label>37</label><mixed-citation publication-type="other" xlink:type="simple"> Nadim, F., Perkins, C., Liu, S. L., Carley, R. J., and Hoag, G. E.: Long-term investigation of atmospheric mercury contamination in Connecticut, Chemosphere, 45, 1033–1043, 2001. </mixed-citation>
</ref>
<ref id="ref38">
<label>38</label><mixed-citation publication-type="other" xlink:type="simple"> The Weather Research and Forecasting Model: http://wrf-model.org/index.php, last access: 4 March 2008. </mixed-citation>
</ref>
<ref id="ref39">
<label>39</label><mixed-citation publication-type="other" xlink:type="simple"> Nolte, C. G., Schauer, J. J., Cass, G. R., and Simoneit, B. R. T.: Trimethylsilyl derivatives of organic compounds in source samples and in atmospheric fine particulate matter, Environ. Sci. Technol., 36, 4273–4281, doi:10.1021/es020518y, 2002. </mixed-citation>
</ref>
<ref id="ref40">
<label>40</label><mixed-citation publication-type="other" xlink:type="simple"> Obrist, D., Moosmuller, H., Schurmann, R., Chen, L. W. A., and Kreidenweis, S. M.: Particulate-phase and gaseous elemental mercury emissions during biomass combustion: Controlling factors and correlation with particulate matter emissions, Environ. Sci. Technol., 42, 721–727, 2008. </mixed-citation>
</ref>
<ref id="ref41">
<label>41</label><mixed-citation publication-type="other" xlink:type="simple"> Pavlish, J. H., Sondreal, E. A., Mann, M. D., Olson, E. S., Galbreath, K. C., Laudal, D. L., and Benson, S. A.: State review of mercury control options for coal-fired power plants, Fuel Process. Technol., 82, 89–165, 2003. </mixed-citation>
</ref>
<ref id="ref42">
<label>42</label><mixed-citation publication-type="other" xlink:type="simple"> Poissant, L., Pilote, M., Beauvais, C., Constant, P., and Zhang, H. H.: A year of continuous measurements of three atmospheric mercury species (GEM, RGM and Hg-p) in southern Quebec, Canada, Atmos. Environ., 39, 1275–1287, 2005. </mixed-citation>
</ref>
<ref id="ref43">
<label>43</label><mixed-citation publication-type="other" xlink:type="simple"> Querol, X., Pey, J., Minguillon, M. C., Perez, N., Alastuey, A., Viana, M., Moreno, T., Bernabe, R. M., Blanco, S., Cardenas, B., Vega, E., Sosa, G., Escalona, S., Ruiz, H., and Artinano, B.: PM speciation and sources in Mexico during the MILAGRO-2006 Campaign, Atmos. Chem. Phys., 8, 111–128, 2008. </mixed-citation>
</ref>
<ref id="ref44">
<label>44</label><mixed-citation publication-type="other" xlink:type="simple"> Raga, G. B., Baumgardner, D., Castro, T., Martinez-Arroyo, A., and Navarro-Gonzalez, R.: Mexico City air quality: a qualitative review of gas and aerosol measurements (1960–2000), Atmos. Environ., 35, 4041–4058, 2001. </mixed-citation>
</ref>
<ref id="ref45">
<label>45</label><mixed-citation publication-type="other" xlink:type="simple"> Rutter, A. P., Hanford, K. L., Zwers, J. T., Perillo-Nicholas, A. L., Schauer, J. J., Worley, C. A., Olson, M. L., and DeWild, J. F.: Evaluation of an Off-line Method for the Analysis OF Atmospheric Reactive Gaseous Mercury and Particulate Mercury, Journal of Air and Waste Management Association, 58(3), 377–383, doi:10.3155/1047-3289.58.3.377, 2008. </mixed-citation>
</ref>
<ref id="ref46">
<label>46</label><mixed-citation publication-type="other" xlink:type="simple"> Rutter, A. P. and Schauer, J. J.: The Effect of Temperature on the Gas-Particle Partitioning of Reactive Mercury in Atmospheric Aerosol, Atmos. Environ., 41, 8647–8657, 2007a. </mixed-citation>
</ref>
<ref id="ref47">
<label>47</label><mixed-citation publication-type="other" xlink:type="simple"> Rutter, A. P. and Schauer, J. J.: The Impact of Aerosol Composition on the Particle to Gas Partitioning of Reactive Mercury, Environ. Sci. Technol., 41(11), 3934–3939, 2007b. </mixed-citation>
</ref>
<ref id="ref48">
<label>48</label><mixed-citation publication-type="other" xlink:type="simple"> Rutter, A. P., Schauer, J. J., Lough, G. C., Snyder, D. C., Kolb, C. J., Von Klooster, S., Rudolf, T., Manolopoulos, H., and Olson, M. L.: A comparison of speciated atmospheric mercury at an urban center and an upwind rural location, J. Environ. Monitor., 10, 102–108, 2008. </mixed-citation>
</ref>
<ref id="ref49">
<label>49</label><mixed-citation publication-type="other" xlink:type="simple"> Sakata, M. and Marumoto, K.: Formation of atmospheric particulate mercury in the Tokyo metropolitan area, Atmos. Environ., 36, 239–246, 2002. </mixed-citation>
</ref>
<ref id="ref50">
<label>50</label><mixed-citation publication-type="other" xlink:type="simple"> Schauer, J. J. and Cass, G. R.: Source apportionment of wintertime gas-phase and particle-phase air pollutants using organic compounds as tracers, Environ. Sci. Technol., 34, 1821–1832, 2000. </mixed-citation>
</ref>
<ref id="ref51">
<label>51</label><mixed-citation publication-type="other" xlink:type="simple"> Schroeder, W. H. and Munthe, J.: Atmospheric mercury – An overview, Atmos. Environ., 32, 809–822, 1998. </mixed-citation>
</ref>
<ref id="ref52">
<label>52</label><mixed-citation publication-type="other" xlink:type="simple"> Seigneur, C., Lohman, K., Vijayaraghavan, K., and Shia, R. L.: Contributions of global and regional sources to mercury deposition in New York State, Environ. Pollut., 123, 365–373, 2003. </mixed-citation>
</ref>
<ref id="ref53">
<label>53</label><mixed-citation publication-type="other" xlink:type="simple"> Seigneur, C., Vijayaraghavan, K., Lohman, K., Karamchandani, P., and Scott, C.: Global source attribution for mercury deposition in the United States, Environ. Sci. Technol., 38, 555–569, 2004. </mixed-citation>
</ref>
<ref id="ref54">
<label>54</label><mixed-citation publication-type="other" xlink:type="simple"> Pollutant Release and Transfer Register (Registro de Emisiones y Transferencia de Contaminantes): http://app1.semarnat.gob.mx/retc/index.php, last access: 8 January 2008, 2006. </mixed-citation>
</ref>
<ref id="ref55">
<label>55</label><mixed-citation publication-type="other" xlink:type="simple"> Sheesley, R. J., Schauer, J. J., Bean, E., and Kenski, D.: Trends in secondary organic aerosol at a remote site in Michigan&apos;s upper peninsula, Environ. Sci. Technol., 38, 6491–6500, 2004. </mixed-citation>
</ref>
<ref id="ref56">
<label>56</label><mixed-citation publication-type="other" xlink:type="simple"> Simoneit, B. R. T., Schauer, J. J., Nolte, C. G., Oros, D. R., Elias, V. O., Fraser, M. P., Rogge, W. F., and Cass, G. R.: Levoglucosan, a tracer for cellulose in biomass burning and atmospheric particles, Atmos. Environ., 33, 173–182, 1999. </mixed-citation>
</ref>
<ref id="ref57">
<label>57</label><mixed-citation publication-type="other" xlink:type="simple"> Simoneit, B. R. T. and Elias, V. O.: Detecting organic tracers from biomass burning in the atmosphere, Mar. Pollut. Bull., 42, 805–810, 2001. </mixed-citation>
</ref>
<ref id="ref58">
<label>58</label><mixed-citation publication-type="other" xlink:type="simple"> Slemr, F., Brunke, E. G., Ebinghaus, R., Temme, C., Munthe, J., Wangberg, I., Schroeder, W., Steffen, A., and Berg, T.: Worldwide trend of atmospheric mercury since 1977, Geophys. Res. Lett., 30(4), 1516, doi:10.1029/2003gl016954, 2003. </mixed-citation>
</ref>
<ref id="ref59">
<label>59</label><mixed-citation publication-type="other" xlink:type="simple"> Stohl, A., Forster, C., Frank, A., Seibert, P., and Wotawa, G.: Technical note: The Lagrangian particle dispersion model FLEXPART version 6.2, Atmos. Chem. Phys., 5, 2461–2474, 2005. </mixed-citation>
</ref>
<ref id="ref60">
<label>60</label><mixed-citation publication-type="other" xlink:type="simple"> Stone, E. A., Snyder, D. C., Sheesley, R. J., Sullivan, A. P., Weber, R. J., and Schauer, J. J.: Source apportionment of fine organic aerosol in Mexico City during the MILAGRO experiment 2006, Atmos. Chem. Phys., 8, 1249–1259, 2008. </mixed-citation>
</ref>
<ref id="ref61">
<label>61</label><mixed-citation publication-type="other" xlink:type="simple"> Stone, E. A., Snyder, D. C., Sheesley, R. J., Sullivan, A. P., Weber, R. J., and Schauer, J. J.: Source apportionment of fine organic aerosol in Mexico City during the MILAGRO experiment 2006, Atmos. Chem. Phys., 8, 1249–1259, 2008. </mixed-citation>
</ref>
<ref id="ref62">
<label>62</label><mixed-citation publication-type="other" xlink:type="simple"> Swartzendruber, P. C., Jaffe, D. A., Prestbo, E. M., Weiss-Penzias, P., Selin, N. E., Park, R., Jacob, D. J., Strode, S., and Jaegle, L.: Observations of reactive gaseous mercury in the free troposphere at the Mount Bachelor Observatory, J. Geophys. Res.-Atmos., 111, D24301, doi:10.1029/2006JD007415, 2006. </mixed-citation>
</ref>
<ref id="ref63">
<label>63</label><mixed-citation publication-type="other" xlink:type="simple"> Weiss-Penzias, P., Jaffe, D. A., Swartzendruber, P., Dennison, J. B., Chand, D., Hafner, W., and Prestbo, E.: Observations of Asian air pollution in the free troposphere at Mount Bachelor Observatory during the spring of 2004, J. Geophys. Res.-Atmos., 111, D10304, doi:10.1029/2005JD006522, 2006. </mixed-citation>
</ref>
<ref id="ref64">
<label>64</label><mixed-citation publication-type="other" xlink:type="simple"> Weiss-Penzias, P., Jaffe, D., Swartzendruber, P., Hafner, W., Chand, D., and Prestbo, E.: Quantifying Asian and biomass burning sources of mercury using the Hg/CO ratio in pollution plumes observed at the Mount Bachelor Observatory, Atmos. Environ., 41, 4366–4379, 2007. </mixed-citation>
</ref>
<ref id="ref65">
<label>65</label><mixed-citation publication-type="other" xlink:type="simple"> Wiener, J. G., Knights, B. C., Sandheinrich, M. B., Jeremiason, J. D., Brigham, M. E., Engstrom, D. R., Woodruff, L. G., Cannon, W. F., and Balogh, S. J.: Mercury in soils, lakes, and fish in Voyageurs National Park (Minnesota): Importance of atmospheric deposition and ecosystem factors, Environ. Sci. Technol., 40, 6261–6268, 2006. </mixed-citation>
</ref>
<ref id="ref66">
<label>66</label><mixed-citation publication-type="other" xlink:type="simple"> Wood, J.: Synthesis of Methyl-mercury Compounds by Extracts of a Methanogenic Bacterium, Nature, 220, 173–174, 1968. </mixed-citation>
</ref>
<ref id="ref67">
<label>67</label><mixed-citation publication-type="other" xlink:type="simple"> Yatavelli, R. L. N., Fahrni, J. K., Kim, M., Crist, K. C., Vickers, C. D., Winter, S. E., and Connell, D. P.: Mercury, PM2.5 and gaseous co-pollutants in the Ohio River Valley region: Preliminary results from the Athens supersite, Atmos. Environ., 40, 6650–6665, 2006. </mixed-citation>
</ref>
<ref id="ref68">
<label>68</label><mixed-citation publication-type="other" xlink:type="simple"> Yokelson, R. J., Urbanski, S. P., Atlas, E. L., Toohey, D. W., Alvarado, E. C., Crounse, J. D., Wennberg, P. O., Fisher, M. E., Wold, C. E., Campos, T. L., Adachi, K., Buseck, P. R., and Hao, W. M.: Emissions from forest fires near Mexico City, Atmos. Chem. Phys., 7, 5569–5584, 2007. </mixed-citation>
</ref>
</ref-list>
</back>
</article>