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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-7-4267-2007</article-id>
<title-group>
<article-title>Ambient aerosol concentrations of sugars and sugar-alcohols at four different sites in Norway</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Yttri</surname>
<given-names>K. E.</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>Dye</surname>
<given-names>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>Kiss</surname>
<given-names>G.</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Norwegian Institute for Air Research, P.O. Box 100, 2027 Kjeller, Norway</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Air Chemistry Group of the Hungarian Academy of Sciences, University of Veszprém, P.O. Box 158, 8201 Veszprém, Hungary</addr-line>
</aff>
<pub-date pub-type="epub">
<day>20</day>
<month>08</month>
<year>2007</year>
</pub-date>
<volume>7</volume>
<issue>16</issue>
<fpage>4267</fpage>
<lpage>4279</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>
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<self-uri xlink:href="http://www.atmos-chem-phys.net/7/4267/2007/acp-7-4267-2007.pdf">The full text article is available as a PDF file from http://www.atmos-chem-phys.net/7/4267/2007/acp-7-4267-2007.pdf</self-uri>
<abstract>
<p>Sugars and sugar-alcohols are demonstrated to be important constituents of
the ambient aerosol water-soluble organic carbon fraction, and to be tracers
for primary biological aerosol particles (PBAP). In the present study,
levels of four sugars (fructose, glucose, sucrose, trehalose) and three
sugar-alcohols (arabitol, inositol, mannitol) in ambient aerosols have been
quantified using a novel HPLC/HRMS-TOF (High Performance Liquid
Chromatography in combination with High Resolution Mass Spectrometry &amp;ndash; Time
of Flight) method to assess the contribution of PBAP to PM&gt;sub&gt;10&lt;/sub&gt; and
PM&lt;sub&gt;2.5&lt;/sub&gt;. Samples were collected at four sites in Norway at different
times of the year in order to reflect the various contributing sources and
the spatial and seasonal variation of the selected compounds.
&lt;br&gt;&lt;br&gt;
Sugars and sugar-alcohols were present at all sites investigated,
underlining the ubiquity of these highly polar organic compounds. The
highest concentrations were reported for sucrose, reaching a maximum
concentration of 320 ng m&lt;sup&gt;&amp;minus;3&lt;/sup&gt; in PM&lt;sub&gt;10&lt;/sub&gt; and 55 ng m&lt;sup&gt;&amp;minus;3&lt;/sup&gt; in
PM&lt;sub&gt;2.5&lt;/sub&gt;. The mean concentration of sucrose was up to 10 times higher than
fructose, glucose and the dimeric sugar trehalose. The mean concentrations
of the sugar-alcohols were typically lower, or equal, to that of the
monomeric sugars and trehalose. Peak concentrations of arabitol and mannitol
did not exceed 30 ng m&lt;sup&gt;&amp;minus;3&lt;/sup&gt; in PM&lt;sub&gt;10&lt;/sub&gt;, and for PM&lt;sub&gt;2.5&lt;/sub&gt; all
concentrations were below 6 ng m&lt;sup&gt;&amp;minus;3&lt;/sup&gt;.
&lt;br&gt;&lt;br&gt;
Sugars and sugar-alcohols were associated primarily with coarse aerosols
except during wintertime at the suburban site in Elverum, where a shift
towards sub micron aerosols was observed. It is proposed that this shift was
due to the intensive use of wood burning for residential heating at this
site during winter, confirmed by high concurrent concentrations of
levoglucosan. Elevated concentrations of sugars in PM&lt;sub&gt;2.5&lt;/sub&gt; were observed
during spring and early summer at the rural background site Birkenes. It is
hypothesized that this was due to ruptured pollen.</p>
</abstract>
<counts><page-count count="13"/></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"> Bauer, H., Kasper-Giebl, A., Löflund, M., Giebl, H., Hitzenberger, R., Zibuschka, F., and Puxbaum, H.: The contribution of bacteria and fungal spores to the organic carbon content of cloud water, precipitation and aerosols, Atmos. Res., 64, 109&amp;ndash;119, 2002. </mixed-citation>
</ref>
<ref id="ref2">
<label>2</label><mixed-citation publication-type="other" xlink:type="simple"> Carvalho, A., Pio, C., and Santos, C.: Water-soluble hydroxylated organic compounds in German and Finnish aerosols, Atmos. Environ., 37, 1775&amp;ndash;1783, 2003. </mixed-citation>
</ref>
<ref id="ref3">
<label>3</label><mixed-citation publication-type="other" xlink:type="simple"> Claeys, M., Graham, B., Vas, G., Wang, W., Vermeylen, R., Pashynska, V., Cafmeyer, J., Guyon, P., Andreae, M. O., Artaxo, P., and Maenhaut, W.: Formation of secondary organic aerosols through photooxidation of isoprene, Science, 303, 1173&amp;ndash;1176, 2004. </mixed-citation>
</ref>
<ref id="ref4">
<label>4</label><mixed-citation publication-type="other" xlink:type="simple"> Decesari, S., Fuzzi, S., Facchini, M.C., Mircea, M., Emblico, L., Cavalli, F., Maenhaut, W. Chi, X., Schkolnik, G., Falkovich, A., Rudich, Y., Claeys, M., Pashynska, V., Vas, G., Kourtchev, I., Vermeylen, R., Hoffer, A., Andreae, M. O., Tagliavini, E., Moretti, F., and Artaxo, P.: Characterization of the organic composition of aerosols from Rondônia, Brazil, during the LBA-SMOCC 2002 experiment and its representation through model compounds, Atmos. Chem. Phys., 6, 375&amp;ndash;402, 2006. </mixed-citation>
</ref>
<ref id="ref5">
<label>5</label><mixed-citation publication-type="other" xlink:type="simple"> Dye, C. and Yttri, K. E.: Determination of monosaccharide anhydrides in atmospheric aerosols by use of high-resolution mass spectrometry combined with high performance liquid chromatography, Anal. Chem., 77, 1853&amp;ndash;1858, 2005. </mixed-citation>
</ref>
<ref id="ref6">
<label>6</label><mixed-citation publication-type="other" xlink:type="simple"> Edney, E. O., Kleindienst, T. E., Jaoui, M., Lewandowski, M., Offenberg, J. H., Wang, W., and Claeys, M.: Formation of 2-methyl tetrols and 2-methylglyceric acid in secondary organic aerosol from laboratory irradiated isoprene/NO&lt;sub&gt;x&lt;/sub&gt;/SO&lt;sub&gt;2&lt;/sub&gt;/air mixtures and their detection in ambient PM$_2.5 $ samples collected in the eastern United States, Atmos. Environ., 39, 5281&amp;ndash;5289, 2005. </mixed-citation>
</ref>
<ref id="ref7">
<label>7</label><mixed-citation publication-type="other" xlink:type="simple"> Elbert, W., Taylor, P. E., Andreae, M. O., and Pöschl, U.: Contribution of fungi to primary biogenic aerosols in the atmosphere: active discharge of spores, carbohydratres, and inorganic ions by Asco-and Basidiomycota, Atmos. Chem. Phys. Discuss., 6, 11 317&amp;ndash;11 355, 2006. </mixed-citation>
</ref>
<ref id="ref8">
<label>8</label><mixed-citation publication-type="other" xlink:type="simple"> Facchini, M. C., Mircea, M., Fuzzi, S., and Charlson, R. J.: Cloud albedo enhancement by surface-active organic solutes in growing droplets, Nature, 401, 257&amp;ndash;259, 1999. </mixed-citation>
</ref>
<ref id="ref9">
<label>9</label><mixed-citation publication-type="other" xlink:type="simple"> Falkovich, A. H., Graber, E. R., Schkolnik, G., Rudich, Y., Maenhaut, W., and Artaxo, P.: Low molecular weight organic acids in aerosol particles from Rondônia, Brazil, during the biomass-burning, transition and wet periods, Atmos. Chem. Phys., 5, 781&amp;ndash;797, 2005. </mixed-citation>
</ref>
<ref id="ref10">
<label>10</label><mixed-citation publication-type="other" xlink:type="simple"> Fine, P. M, Cass, G., and Simoneit, B. R. T.: Chemical characterization of fine particle emissions from the fireplace combustion of woods grown in the Southern United States, Environ. Sci. Technol., 36, 1442&amp;ndash;1451, 2002. </mixed-citation>
</ref>
<ref id="ref11">
<label>11</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&amp;ndash;4564, 2000. </mixed-citation>
</ref>
<ref id="ref12">
<label>12</label><mixed-citation publication-type="other" xlink:type="simple"> Graber, E. R. and Rudich, Y.: Atmospheric HULIS: How humic-like are they? A comprehensive and critical review, Atmos. Chem. Phys., 6, 729&amp;ndash;753, 2006. </mixed-citation>
</ref>
<ref id="ref13">
<label>13</label><mixed-citation publication-type="other" xlink:type="simple"> Graham, G., Falkovich, A. H., Rudich, Y., Maenhaut, W., Guyon, P., and Andreae, M. O.: Local and regional contributions to the atmospheric aerosol over Tel Aviv, Israel: a case study using elemental, ionic and organic tracers, Atmos. Environ., 38, 1593&amp;ndash;1604, 2004. </mixed-citation>
</ref>
<ref id="ref14">
<label>14</label><mixed-citation publication-type="other" xlink:type="simple"> Graham, B., Guyon, P., Taylor, P. E., Artaxo, P., Maenhaut, W., Glovsky, M. M., Flagan, R.C., and Andreae, M. O.: Organic compounds present in the natural Amazonian aerosol: Characterization by gas chromatography-mass spectrometry, J. Geophys. Res., 108, 4766, doi:10.1029/2003JD003990, 2003. </mixed-citation>
</ref>
<ref id="ref15">
<label>15</label><mixed-citation publication-type="other" xlink:type="simple"> Graham, B., Mayol-Bracero, O.L., Guyon, P., Roberts, G. C., Decesari, S. Facchini, M. C., Artaxo, P., Maenhaut, W., Köll, P., and Andreae, M. O.: Water-soluble organic compounds in biomass burning aerosols over Amazonia 1. Characterization by NMR and GC-MS, J. Geophys. Res., 107, 8047, doi:10.1029/2001JD000336, 2002. </mixed-citation>
</ref>
<ref id="ref16">
<label>16</label><mixed-citation publication-type="other" xlink:type="simple"> Gysel, M., Weingartner, E., Nyeki, S., Baltensperger, U., Galambos, I., and Kiss, G.: Hygroscopic properties of water soluble matter and humic-like organics in atmospheric fine aerosol, Atmos. Chem. Phys., 4, 35&amp;ndash;50, 2004. </mixed-citation>
</ref>
<ref id="ref17">
<label>17</label><mixed-citation publication-type="other" xlink:type="simple"> Havers, N., Burba, P., Lambert, J., and Klockow, D.: Spectroscopic characterization of humic-like substances in airborne particulate matter, J. Atmos. Chem., 29, 45&amp;ndash;54, 1998. </mixed-citation>
</ref>
<ref id="ref18">
<label>18</label><mixed-citation publication-type="other" xlink:type="simple"> Hopke, P. K., Xie, Y., Raunemaa, T., Biegalski, S., Landsberger, S., Maenhaut, W., Artaxo, P., and Cohen, D.: Characterization of the gent stacked filter unit PM$_10$ sampler, Aerosol Sci. Technol., 27, 726&amp;ndash;735, 1997. </mixed-citation>
</ref>
<ref id="ref19">
<label>19</label><mixed-citation publication-type="other" xlink:type="simple"> Ion, A. C., Vermeylen, R., Kourtchev, I., Cafmeyer, J., Chi, X., Gelencser, A., Maenhaut, W., and Claeys, M.: Polar organic compounds in rural PM2.5 aerosols from K-puszta, Hungary, during a 2003 summer field campaign: Sources and diel variations, Atmos. Chem. Phys., 5, 1805&amp;ndash;1814, 2005. </mixed-citation>
</ref>
<ref id="ref20">
<label>20</label><mixed-citation publication-type="other" xlink:type="simple"> Kamens, R., Bell, D., Dietrich, A., Perry, J., Goodman, R., Claxton, L., and Tejada, S.: Mutagenic transformations of dilute wood smoke systems in the presence of ozone and nitrogen dioxide &amp;ndash; analysis of selected high-pressure liquid chromatography fractions from wood smoke particle extracts, Environ. Sci. Technol., 19, 63&amp;ndash;69, 1985. </mixed-citation>
</ref>
<ref id="ref21">
<label>21</label><mixed-citation publication-type="other" xlink:type="simple"> Kawamura, K. and Yasui, O.: Diurnal changes in the distribution of dicarboxylic acids, ketocarboxylic acids and dicarbonyls in the urban Tokyo atmosphere, Atmos. Environ., 39, 1945&amp;ndash;1960, 2005. </mixed-citation>
</ref>
<ref id="ref22">
<label>22</label><mixed-citation publication-type="other" xlink:type="simple"> Kerminen, V. M., Ojanen, C., Pakkanen, T., Hillamo, R., Aurela, M., and Merilainen, J.: Low-molecular-weight dicarboxylic acids in an urban and rural atmosphere, J. Aerosol Sci., 31, 349&amp;ndash;362, 2000. </mixed-citation>
</ref>
<ref id="ref23">
<label>23</label><mixed-citation publication-type="other" xlink:type="simple"> Kirchstetter, T. W., Corrigan, C. E., and Novakov, T.: Laboratory and field investigation of the adsorption of gaseous organic compounds onto quartz filters, Atmos. Environ., 35, 1663&amp;ndash;1671, 2001. </mixed-citation>
</ref>
<ref id="ref24">
<label>24</label><mixed-citation publication-type="other" xlink:type="simple"> Kiss, G., Varga, B., Galambos, I., and Ganszky, I.: Characterization of water-soluble organic matter isolated from atmospheric fine aerosol, J. Geophys. Res., 107, 8339, doi:10.1029/2001JD000603, 2002. </mixed-citation>
</ref>
<ref id="ref25">
<label>25</label><mixed-citation publication-type="other" xlink:type="simple"> Kleefeld, S., Hoffer, A., Krivácsy, Z., and Jennings, S. G.: Importance of organic and black carbon in atmospheric aerosols at Mace Head, on the west coast of Ireland, Atmos. Environ., 36, 4479&amp;ndash;4490, 2002. </mixed-citation>
</ref>
<ref id="ref26">
<label>26</label><mixed-citation publication-type="other" xlink:type="simple"> Krivácsy, Z., Gelencser, A., Kiss, G., Meszaros, E., Molnar, A., Hoffer, A., Meszaros, T., Sarvari, Z., Temesi, D., Varga, B., Baltensperger, U., Nyeki, S., and Weingartner, E.: Study on the chemical character of water soluble organic compounds in fine atmospheric aerosol at the Jungfraujoch, J. Atmos. Chem., 39, 235&amp;ndash;259, 2001. </mixed-citation>
</ref>
<ref id="ref27">
<label>27</label><mixed-citation publication-type="other" xlink:type="simple"> Kourtchev, I., Ruuskanen, T., Maenhaut, W., Kulmala, M., and Claeys, M.: Observation of 2-methyltetrols and related photo-oxidation products of isoprene in boreal forest aerosols from Hyytiala, Finland, Atmos. Chem. Phys., 5, 2761&amp;ndash;2770, 2005. </mixed-citation>
</ref>
<ref id="ref28">
<label>28</label><mixed-citation publication-type="other" xlink:type="simple"> Lewis, D. H. and Smith, D. C.: Sugar-alcohols (polyols) in fungi and green plants. I. Distribution, physiology and metabolism, New Phytol., 66, 143-184, 1967. </mixed-citation>
</ref>
<ref id="ref29">
<label>29</label><mixed-citation publication-type="other" xlink:type="simple"> Mader, B. T., Yu, J. Z., Xu, J. H., Li, Q. F., Wu, W. S., Flagan, R. C., and Seinfeld, J. H.: Molecular composition of the water-soluble fraction of atmospheric carbonaceous aerosols collected during ACE-Asia, J. Geophys. Res., 109, D06206, doi:10.1029/2003JD004105, 2004. </mixed-citation>
</ref>
<ref id="ref30">
<label>30</label><mixed-citation publication-type="other" xlink:type="simple"> Matthias-Maser, S.: Primary biological aerosol particles: Their significance, sources, sampling methods and size distribution in the atmosphere, in: Atmospheric particles, edited by: Harrison, R. M. and van Grieken, R., John Wiley &amp; Sons, Chichester, 349&amp;ndash;368, 1998. </mixed-citation>
</ref>
<ref id="ref31">
<label>31</label><mixed-citation publication-type="other" xlink:type="simple"> Mayol-Bracero, O. L., Guyon, P., Graham, B., Roberts, G., Andreae, M. O., Decesari, S., Facchini, M. C., Fuzzi, S., and Artaxo, P.: Water-soluble organic compounds in biomass burning aerosols over Amazonia &amp;ndash; 2. Apportionment of the chemical composition and importance of the polyacidic fraction, J. Geophys. Res., 107, 8091, doi:10.1029/2001JD003249, 2002. </mixed-citation>
</ref>
<ref id="ref32">
<label>32</label><mixed-citation publication-type="other" xlink:type="simple"> McDow, S. R. and Huntzicker, J. J.: Vapor adsorption artifact in the sampling of organic aerosol: face velocity effects, Atmos. Environ., 24A, 2563&amp;ndash;2571, 1990. </mixed-citation>
</ref>
<ref id="ref33">
<label>33</label><mixed-citation publication-type="other" xlink:type="simple"> Medeiros, P. M., Conte, M. H., Weber, J. C., and Simoneit, B. R. T.: Sugars as source indicators of biogenic organic carbon in aerosols collected above the Howland Experimental Forest, Maine, Atmos. Environ., 40, 1694&amp;ndash;1705, 2006. </mixed-citation>
</ref>
<ref id="ref34">
<label>34</label><mixed-citation publication-type="other" xlink:type="simple"> Medeiros, P. M. and Simoneit, B. R. T.: Analysis of sugars in environmental samples by gas chromatography-mass spectrometry, J. Chromatogr., A, 1141, 271&amp;ndash;278, 2007. </mixed-citation>
</ref>
<ref id="ref35">
<label>35</label><mixed-citation publication-type="other" xlink:type="simple"> Nolte, C. G., Schauer, J. J., Cass, G. R., and Simoneit, B. R. T.: Highly polar organic compounds present in wood smoke and in the ambient atmosphere, Environ. Sci. Technol., 35, 1912&amp;ndash;1919, 2001. </mixed-citation>
</ref>
<ref id="ref36">
<label>36</label><mixed-citation publication-type="other" xlink:type="simple"> Novakov, T. and Penner, J. E.: Large contribution of organic aerosols to cloud condensation nuclei concentrations, Nature, 365, 823&amp;ndash;826, 1993. </mixed-citation>
</ref>
<ref id="ref37">
<label>37</label><mixed-citation publication-type="other" xlink:type="simple"> Pacini, E.: From anther and pollen ripening to pollen presentation, Plant Syst. Evol., 222, 19&amp;ndash;43, 2000. </mixed-citation>
</ref>
<ref id="ref38">
<label>38</label><mixed-citation publication-type="other" xlink:type="simple"> Pashynska, V., Vermeylen, R., Vas, G., Maenhaut, W., and Claeys, M.: Development of a gas chromatographic/ion trap mass spectrometric method for the determination of levoglucosan and saccharidic compounds in atmospheric aerosols. Application to urban aerosols, J. Mass Spectrom., 37, 1249&amp;ndash;1257, 2002. </mixed-citation>
</ref>
<ref id="ref39">
<label>39</label><mixed-citation publication-type="other" xlink:type="simple"> Ramanathan, V., Crutzen, P. J., Kiehl, J. T., and Rosenfeld, D.: Aerosols, climate and the hydrological cycle, Science, 294, 2119&amp;ndash;2124, 2001. </mixed-citation>
</ref>
<ref id="ref40">
<label>40</label><mixed-citation publication-type="other" xlink:type="simple"> Romero, F. and Oehme, M.: Organosulfates &amp;ndash; A new component of humic-like substances in atmospheric aerosols?, J. Atmos. Chem., 52, 283&amp;ndash;294, 2005. </mixed-citation>
</ref>
<ref id="ref41">
<label>41</label><mixed-citation publication-type="other" xlink:type="simple"> Sanders, E. B., Goldsmith, A. I., and Seeman, J. I.: A model that distinguishes the pyrolysis of D-glucose, D-fructose, and sucrose from that of cellulose. Application to the understanding of cigarette smoke formation, J. Anal. Appl. Pyrolysis, 66, 29&amp;ndash;50, 2002. </mixed-citation>
</ref>
<ref id="ref42">
<label>42</label><mixed-citation publication-type="other" xlink:type="simple"> Saxena, P. and Hildemann, L. M.: Water-soluble organics in atmospheric particles: A critical review of the literature and application of thermodynamics to identify candidate compounds, J. Atmos. Chem., 24, 57&amp;ndash;109, 1996. </mixed-citation>
</ref>
<ref id="ref43">
<label>43</label><mixed-citation publication-type="other" xlink:type="simple"> Schauer, J. J., Kleeman, M. J, Cass, G. R., and Simoneit, B. R. T.: Measurement of emissions from air pollution sources. 3. C$_1$-C$_29$ organic compounds from fireplace combustion of wood, Environ. Sci. Technol., 35, 1716&amp;ndash;1728, 2001. </mixed-citation>
</ref>
<ref id="ref44">
<label>44</label><mixed-citation publication-type="other" xlink:type="simple"> Schkolnik, G., Falkovich, A. H., Rudich, Y., Maenhaut, W., and Artaxo, P.: A new method for the determination of levoglucosan, methyl-erythritol and related compounds and its application for rainwater and smoke samples, Environ. Sci. Technol., 39, 2744&amp;ndash;2752, 2005. </mixed-citation>
</ref>
<ref id="ref45">
<label>45</label><mixed-citation publication-type="other" xlink:type="simple"> Schkolnik, G. and Rudich, Y.: Detection and quantification of levoglucosan in atmospheric aerosols &amp;ndash; review, Anal. Bioanal. Chem., 385, 26&amp;ndash;33 doi:10.1007/s00216-005-0168-5 2006. </mixed-citation>
</ref>
<ref id="ref46">
<label>46</label><mixed-citation publication-type="other" xlink:type="simple"> Simoneit, B. R. T.: Biomass burning &amp;ndash; a review of organic tracers for smoke from incomplete combustion, Appl. Geochem., 17, 129&amp;ndash;162, 2002. </mixed-citation>
</ref>
<ref id="ref47">
<label>47</label><mixed-citation publication-type="other" xlink:type="simple"> Simoneit, B. R. T., Elias, V. O., Kobayashi, M., Kawamura, K., Rushdi, A. I., Medeiros, P. M., Rogge, W. F., and Didyk, B. M.: Sugars &amp;ndash; Dominant water-soluble organic compounds in soils and characterization as tracers in atmospheric particulate matter, Environ. Sci. Technol., 38, 5939&amp;ndash;5949, 2004. </mixed-citation>
</ref>
<ref id="ref48">
<label>48</label><mixed-citation publication-type="other" xlink:type="simple"> Stohl, A., Berg, T., Burkhart, J. F., Fjǽraa, A. M., Forster, C., Herber, A., Hov, Ø., Lunder, C., McMillan, W. W., Oltmans, S., Shiobara, M., Simpson, D., Solberg, S., Stebel, K., Ström, J., Tørseth, K., Treffeisen, R., Virkkunen, K., and Yttri, K. E.: Arctic smoke &amp;ndash; record high air pollution levels in the European Arctic due to agricultural fires in Eastern Europe. Atmos. Chem. Phys. 7, 511&amp;ndash;534, 2007. </mixed-citation>
</ref>
<ref id="ref49">
<label>49</label><mixed-citation publication-type="other" xlink:type="simple"> Surratt, J. D., Kroll, J. H., Kleindienst, T. E., Edney, E. O., Claeys, M., Sorooshian, A., Ng, N. L., Offenberg, J. H., Lewandowski, M., Jaoui, M., Flagan, R. C., and Seinfeld, J. H.: Evidence for organosulfates in secondary organic aerosol. Environ. Sci. Technol., 41, 517&amp;ndash;527, 2007. </mixed-citation>
</ref>
<ref id="ref50">
<label>50</label><mixed-citation publication-type="other" xlink:type="simple"> Surratt, J. D., Murphy, S. M., Kroll, J. H., Ng, N. L., Hildebrandt, L., Sorooshian, A., Szmigielski, R., Vermeylen, R., Maenhaut, W., Claeys, M., Flagan, R. C., and Seinfeld, J. H.: Chemical composition of secondary organic aerosol formed from the photooxidation of isoprene. J. Phys. Chem. A., 6, 110, 9665&amp;ndash;9690, 2006. </mixed-citation>
</ref>
<ref id="ref51">
<label>51</label><mixed-citation publication-type="other" xlink:type="simple"> Taylor, P. E., Flagan, R. C., Miguel, A. G., Valenta, R., and Glovsky, M. M.: Birch pollen rupture and the release of aerosols of respirable allergens, Clin. Exp. Allergy, 34, 1591&amp;ndash;1596, 2004. </mixed-citation>
</ref>
<ref id="ref52">
<label>52</label><mixed-citation publication-type="other" xlink:type="simple"> Taylor, P. E., Flagan, R. C., Valenta, R., and Glovsky, M. M.: Release of allergens as respirable aerosols: A link between grass pollen and asthma, J. Allergy Clin. Immun.. 109, 51&amp;ndash;56, 2002. </mixed-citation>
</ref>
<ref id="ref53">
<label>53</label><mixed-citation publication-type="other" xlink:type="simple"> Tesfaigzi, Y., Singh, S. P., Foster, J. E., Kubatko, J., Barr, E. B., Fine, P. M., McDonald, J. D., Hahn, F. F., and Mauderly, J. L.: Health effects of subchronic exposure to low levels of wood smoke in rats, Toxicol. Sci., 65, 115&amp;ndash;125, 2002. </mixed-citation>
</ref>
<ref id="ref54">
<label>54</label><mixed-citation publication-type="other" xlink:type="simple"> Varga, B., Kiss, G., Ganszky, I., Gelencser, A., and Krivacsy, Z.: Isolation of water-soluble organic matter from atmospheric aerosol, Talanta, 55, 561&amp;ndash;572, 2001. </mixed-citation>
</ref>
<ref id="ref55">
<label>55</label><mixed-citation publication-type="other" xlink:type="simple"> Yttri, K. E., Dye, C., Slørdal, L. H., and Braathen, O.-A.: Quantification of monosaccharide anhydrides by negative electrospray HPLC/HRMS-TOF &amp;ndash; Application to aerosol samples from an urban and a suburban site influenced by small scale wood burning, J. Air Waste Ma., 55, 1169&amp;ndash;1177, 2005. </mixed-citation>
</ref>
<ref id="ref56">
<label>56</label><mixed-citation publication-type="other" xlink:type="simple"> Zappoli, S., Andracchio, A., Fuzzi, S., Facchini, M. C., Gelencser, A., Kiss, G., Krivacsy, Z., Molnar, A., Meszaros, E., Hansson, H. C., Rosman, K., and Zebuhr, Y.: Inorganic, organic and macromolecular components of fine aerosol in different areas of Europe in relation to their water solubility, Atmos. Environ., 33, 2733&amp;ndash;2743, 1999. </mixed-citation>
</ref>
<ref id="ref57">
<label>57</label><mixed-citation publication-type="other" xlink:type="simple"> Zdráhal, Z., Oliveira, J., Vermeylen, R., Claeys, M., and Maenhaut, W.: Improved method for quantifying levoglucosan and related monosaccharide anhydrides in atmospheric aerosols and application to samples from urban and tropical locations, Environ. Sci. Technol., 36, 747&amp;ndash;757, 2002. </mixed-citation>
</ref>
</ref-list>
</back>
</article>