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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>GÃ¶ttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/acp-12-3189-2012</article-id>
<title-group>
<article-title>One decade of parallel fine (PM&lt;sub&gt;2.5&lt;/sub&gt;) and coarse (PM&lt;sub&gt;10&lt;/sub&gt;â€“PM&lt;sub&gt;2.5&lt;/sub&gt;) particulate matter measurements in Europe: trends and variability</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Barmpadimos</surname>
<given-names>I.</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>Keller</surname>
<given-names>J.</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>Oderbolz</surname>
<given-names>D.</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>Hueglin</surname>
<given-names>C.</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>PrÃ©vÃ´t</surname>
<given-names>A. S. H.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Paul Scherrer Institute, Villigen, Switzerland</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Swiss Federal Laboratories for Materials Science and Technology, DÃ¼bendorf, Switzerland</addr-line>
</aff>
<pub-date pub-type="epub">
<day>03</day>
<month>04</month>
<year>2012</year>
</pub-date>
<volume>12</volume>
<issue>7</issue>
<fpage>3189</fpage>
<lpage>3203</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/12/3189/2012/acp-12-3189-2012.pdf">The full text article is available as a PDF file from http://www.atmos-chem-phys.net/12/3189/2012/acp-12-3189-2012.pdf</self-uri>
<abstract>
<p>The trends and variability of PM&lt;sub&gt;10&lt;/sub&gt;, PM&lt;sub&gt;2.5&lt;/sub&gt; and PM&lt;sub&gt;coarse&lt;/sub&gt;
concentrations at seven urban and rural background stations in five European
countries for the period between 1998 and 2010 were investigated. Collocated
or nearby PM measurements and meteorological observations were used in order
to construct Generalized Additive Models, which model the effect of each
meteorological variable on PM concentrations. In agreement with previous
findings, the most important meteorological variables affecting PM
concentrations were wind speed, wind direction, boundary layer depth,
precipitation, temperature and number of consecutive days with synoptic
weather patterns that favor high PM concentrations. Temperature has a
negative relationship to PM&lt;sub&gt;2.5&lt;/sub&gt; concentrations for low temperatures and
a positive relationship for high temperatures. The stationary point of this
relationship varies between 5 and 15 Â°C depending on the station.
PM&lt;sub&gt;coarse&lt;/sub&gt; concentrations increase for increasing temperatures almost
throughout the temperature range. Wind speed has a monotonic relationship to
PM&lt;sub&gt;2.5&lt;/sub&gt; except for one station, which exhibits a stationary point.
Considering PM&lt;sub&gt;coarse&lt;/sub&gt;, concentrations tend to increase or stabilize for
large wind speeds at most stations. It was also observed that at all
stations except one, higher PM&lt;sub&gt;2.5&lt;/sub&gt; concentrations occurred for east wind
direction, compared to west wind direction. Meteorologically adjusted PM
time series were produced by removing most of the PM variability due to
meteorology. It was found that PM&lt;sub&gt;10&lt;/sub&gt; and PM&lt;sub&gt;2.5&lt;/sub&gt; concentrations
decrease at most stations. The average trends of the raw and
meteorologically adjusted data are âˆ’0.4 Î¼g m&lt;sup&gt;âˆ’3&lt;/sup&gt; yr&lt;sup&gt;âˆ’1&lt;/sup&gt; for
PM&lt;sub&gt;10&lt;/sub&gt; and PM&lt;sub&gt;2.5&lt;/sub&gt; size fractions. PM&lt;sub&gt;coarse&lt;/sub&gt; have much smaller
trends and after averaging over all stations, no significant trend was
detected at the 95% level of confidence. It is suggested that decreasing
PM&lt;sub&gt;coarse&lt;/sub&gt; in addition to PM&lt;sub&gt;2.5&lt;/sub&gt; can result in a faster decrease of
PM&lt;sub&gt;10&lt;/sub&gt; in the future. The trends of the 90th quantile of PM&lt;sub&gt;10&lt;/sub&gt;
and PM&lt;sub&gt;2.5&lt;/sub&gt; concentrations were examined by quantile regression in order
to detect long term changes in the occurrence of very large PM
concentrations. The meteorologically adjusted trends of the 90th
quantile were significantly larger (as an absolute value) on average over
all stations (âˆ’0.6 Î¼g m&lt;sup&gt;âˆ’3&lt;/sup&gt; yr&lt;sup&gt;âˆ’1&lt;/sup&gt;).</p>
</abstract>
<counts><page-count count="15"/></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"> Aldrin, M. and Haff, I. H.: Generalised additive modelling of air pollution, traffic volume and meteorology, Atmos. Environ., 39, 2145â€“2155, http://dx.doi.org/10.1016/j.atmosenv.2004.12.020doi:10.1016/j.atmosenv.2004.12.020, 2005. </mixed-citation>
</ref>
<ref id="ref2">
<label>2</label><mixed-citation publication-type="other" xlink:type="simple"> Barmpadimos, I., Hueglin, C., Keller, J., Henne, S., and PrÃ©vÃ´t, A. S. H.: Influence of meteorology on PM$_10$ trends and variability in Switzerland from 1991 to 2008, Atmos. Chem. Phys., 11, 1813â€“1835, http://dx.doi.org/10.5194/acp-11-1813-2011doi:10.5194/acp-11-1813-2011, 2011a. </mixed-citation>
</ref>
<ref id="ref3">
<label>3</label><mixed-citation publication-type="other" xlink:type="simple"> Barmpadimos, I., Nufer, M., Oderbolz, D. C., Keller, J., Aksoyoglu, S., Hueglin, C., Baltensperger, U., and PrÃ©vÃ´t, A. S. H.: The weekly cycle of ambient concentrations and traffic emissions of coarse (PM$_10$â€“PM$_2.5)$ atmospheric particles, Atmos. Environ., 45, 4580â€“4590, http://dx.doi.org/10.1016/j.atmosenv.2011.05.068doi:10.1016/j.atmosenv.2011.05.068, 2011b. </mixed-citation>
</ref>
<ref id="ref4">
<label>4</label><mixed-citation publication-type="other" xlink:type="simple"> Becker, S., Soukup, J. M., Sioutas, C., and Cassee, F. R.: Response of human alveolar macrophages to ultrafine, fine, and coarse urban air pollution particles, Experimental Lung Research, 29, 29â€“44, 2003. </mixed-citation>
</ref>
<ref id="ref5">
<label>5</label><mixed-citation publication-type="other" xlink:type="simple"> Brunekreef, B. and Forsberg, B.: Epidemiological evidence of effects of coarse airborne particles on health, European Respiratory Journal, 26, 309â€“318, http://dx.doi.org/10.1183/09031936.05.00001805doi:10.1183/09031936.05.00001805, 2005. </mixed-citation>
</ref>
<ref id="ref6">
<label>6</label><mixed-citation publication-type="other" xlink:type="simple"> Carlton, A. G., Pinder, R. W., Bhave, P. V., and Pouliot, G. A.: To what extent can biogenic SOA be controlled?, Environ. Sci. Technol., 44, 3376â€“3380, http://dx.doi.org/10.1021/es903506bdoi:10.1021/es903506b, 2010. </mixed-citation>
</ref>
<ref id="ref7">
<label>7</label><mixed-citation publication-type="other" xlink:type="simple"> Chang, H. H., Peng, R. D., and Dominici, F.: Estimating the acute health effects of coarse particulate matter accounting for exposure measurement error, Biostatistics, 12, 637â€“652, http://dx.doi.org/10.1093/biostatistics/kxr002doi:10.1093/biostatistics/kxr002, 2011. </mixed-citation>
</ref>
<ref id="ref8">
<label>8</label><mixed-citation publication-type="other" xlink:type="simple"> Clot, B.: Airborne birch pollen in NeuchÃ¢tel (Switzerland): onset, peak and daily patterns, Aerobiologia, 17, 25â€“29, http://dx.doi.org/10.1023/a:1007652220568doi:10.1023/a:1007652220568, 2001. </mixed-citation>
</ref>
<ref id="ref9">
<label>9</label><mixed-citation publication-type="other" xlink:type="simple"> Colette, A., Granier, C., Hodnebrog, Ã˜., Jakobs, H., Maurizi, A., Nyiri, A., Bessagnet, B., D&apos;Angiola, A., D&apos;Isidoro, M., Gauss, M., Meleux, F., Memmesheimer, M., Mieville, A., RouÃ¯l, L., Russo, F., Solberg, S., Stordal, F., and Tampieri, F.: Air quality trends in Europe over the past decade: a first multi-model assessment, Atmos. Chem. Phys., 11, 11657â€“11678, http://dx.doi.org/10.5194/acp-11-11657-2011doi:10.5194/acp-11-11657-2011, 2011. </mixed-citation>
</ref>
<ref id="ref10">
<label>10</label><mixed-citation publication-type="other" xlink:type="simple"> Elminir, H. K.: Dependence of urban air pollutants on meteorology, Sci. Total Environ., 350, 225â€“237, http://dx.doi.org/10.1016/j.scitotenv.2005.01.043doi:10.1016/j.scitotenv.2005.01.043, 2005. </mixed-citation>
</ref>
<ref id="ref11">
<label>11</label><mixed-citation publication-type="other" xlink:type="simple"> European Parliament and Council of the European Union: Directive 2008/50/EC of the European Parliament and of the Council of 21 May 2008 on ambient air quality and cleaner air for Europe, Official Journal of the European Union, L 152, 1â€“144, 2008. </mixed-citation>
</ref>
<ref id="ref12">
<label>12</label><mixed-citation publication-type="other" xlink:type="simple"> Gerasopoulos, E., Kouvarakis, G., Babasakalis, P., Vrekoussis, M., Putaud, J. P., and Mihalopoulos, N.: Origin and variability of particulate matter (PM$_10$) mass concentrations over the Eastern Mediterranean, Atmos. Environ., 40, 4679â€“4690, http://dx.doi.org/10.1016/j.atmosenv.2006.04.020doi:10.1016/j.atmosenv.2006.04.020, 2006. </mixed-citation>
</ref>
<ref id="ref13">
<label>13</label><mixed-citation publication-type="other" xlink:type="simple"> Gerstengarbe, F.-W., Werner, P. C., and RÃ¼ge, U.: Katalog der GroÃŸwetterlagen Europas (1881â€“1998) nach Paul Hess und Helmuth Brezowsky. 5., verbesserte und ergÃ¤nzte Auflage Potsdam-Institut fÃ¼r Klimafolgenforschung, Potsdam, 1999. </mixed-citation>
</ref>
<ref id="ref14">
<label>14</label><mixed-citation publication-type="other" xlink:type="simple"> Gianini, M. F. D., Gehrig, R., Fischer, A., Ulrich, A., Wichser, A., and Hueglin, C.: Chemical composition of PM10 in Switzerland: An analysis for 2008/2009 and changes since 1998/1999, Atmos. Environ., in press, 2012. </mixed-citation>
</ref>
<ref id="ref15">
<label>15</label><mixed-citation publication-type="other" xlink:type="simple"> Gillette, D. A. and Passi, R.: Modeling dust emission caused by wind erosion, J. Geophys. Res.-Atmos., 93, 14233â€“14242, http://dx.doi.org/10.1029/JD093iD11p14233doi:10.1029/JD093iD11p14233, 1988. </mixed-citation>
</ref>
<ref id="ref16">
<label>16</label><mixed-citation publication-type="other" xlink:type="simple"> Harrison, R. M., Yin, J., Mark, D., Stedman, J., Appleby, R. S., Booker, J., and Moorcroft, S.: Studies of the coarse particle (2.5â€“10 Î¼m) component in UK urban atmospheres, Atmos. Environ., 35, 3667â€“3679, http://dx.doi.org/10.1016/s1352-2310(00)00526-4doi:10.1016/s1352-2310(00)00526-4, 2001. </mixed-citation>
</ref>
<ref id="ref17">
<label>17</label><mixed-citation publication-type="other" xlink:type="simple"> Harrison, R. M., Stedman, J., and Derwent, D.: New Directions: Why are PM10 concentrations in Europe not falling?, Atmos. Environ., 42, 603â€“606, http://dx.doi.org/10.1016/j.atmosenv.2007.11.023doi:10.1016/j.atmosenv.2007.11.023, 2008. </mixed-citation>
</ref>
<ref id="ref18">
<label>18</label><mixed-citation publication-type="other" xlink:type="simple"> Hastie, T. J. and Tibshirani, R. J.: Generalized Additive Models, Taylor and Francis, Boca Raton, 1990. </mixed-citation>
</ref>
<ref id="ref19">
<label>19</label><mixed-citation publication-type="other" xlink:type="simple"> Hien, P. D., Bac, V. T., Tham, H. C., Nhan, D. D., and Vinh, L. D.: Influence of meteorological conditions on PM$_2.5$ and PM$_2.5-10$ concentrations during the monsoon season in Hanoi, Vietnam, Atmos. Environ., 36, 3473â€“3484, http://dx.doi.org/10.1016/s1352-2310(02)00295-9doi:10.1016/s1352-2310(02)00295-9, 2002. </mixed-citation>
</ref>
<ref id="ref20">
<label>20</label><mixed-citation publication-type="other" xlink:type="simple"> Hoogerbrugge, R., Denier van der Gon, H. A. C., van Zanten, M. C., and Matthijsen, J.: Trends in Particulate Matter Netherlands Research Program on Particulate Matter, 2010. </mixed-citation>
</ref>
<ref id="ref21">
<label>21</label><mixed-citation publication-type="other" xlink:type="simple"> Hooyberghs, J., Mensink, C., Dumont, G., Fierens, F., and Brasseur, O.: A neural network forecast for daily average PM$_10$ concentrations in Belgium, Atmos. Environ., 39, 3279â€“3289, http://dx.doi.org/10.1016/j.atmosenv.2005.01.050doi:10.1016/j.atmosenv.2005.01.050, 2005. </mixed-citation>
</ref>
<ref id="ref22">
<label>22</label><mixed-citation publication-type="other" xlink:type="simple"> Jones, A. M., Harrison, R. M., and Baker, J.: The wind speed dependence of the concentrations of airborne particulate matter and NO&lt;sub&gt;x&lt;/sub&gt;, Atmos. Environ., 44, 1682â€“1690, http://dx.doi.org/10.1016/j.atmosenv.2010.01.007doi:10.1016/j.atmosenv.2010.01.007, 2010. </mixed-citation>
</ref>
<ref id="ref23">
<label>23</label><mixed-citation publication-type="other" xlink:type="simple"> Kalabokas, P. D., Adamopoulos, A. D., and Viras, L. G.: Atmospheric PM$_10$ particle concentration measurements at central and peripheral urban sites in Athens and Thessaloniki, Greece, Global NEST Journal, 12, 71â€“81, 2010. </mixed-citation>
</ref>
<ref id="ref24">
<label>24</label><mixed-citation publication-type="other" xlink:type="simple"> Karl, M., Guenther, A., KÃ¶ble, R., Leip, A., and Seufert, G.: A new European plant-specific emission inventory of biogenic volatile organic compounds for use in atmospheric transport models, Biogeosciences, 6, 1059â€“1087, http://dx.doi.org/10.5194/bg-6-1059-2009doi:10.5194/bg-6-1059-2009, 2009. </mixed-citation>
</ref>
<ref id="ref25">
<label>25</label><mixed-citation publication-type="other" xlink:type="simple"> Koenker, R.: quantreg: Quantile Regression. R package version 4.77, available at: http://CRAN.R-project.org/package=quantreg, 2012. </mixed-citation>
</ref>
<ref id="ref26">
<label>26</label><mixed-citation publication-type="other" xlink:type="simple"> Koenker, R. and Bassett Jr., G.: Regression Quantiles, Econometrica, 46, 33â€“50, 1978. </mixed-citation>
</ref>
<ref id="ref27">
<label>27</label><mixed-citation publication-type="other" xlink:type="simple"> Liu, Y.-J. and Harrison, R. M.: Properties of coarse particles in the atmosphere of the United Kingdom, Atmos. Environ., 45, 3267â€“3276, http://dx.doi.org/10.1016/j.atmosenv.2011.03.039doi:10.1016/j.atmosenv.2011.03.039, 2011. </mixed-citation>
</ref>
<ref id="ref28">
<label>28</label><mixed-citation publication-type="other" xlink:type="simple"> Mann, H. B.: NONPARAMETRIC TESTS AGAINST TREND, Econometrica, 13, 245â€“259, http://dx.doi.org/10.2307/1907187doi:10.2307/1907187, 1945. </mixed-citation>
</ref>
<ref id="ref29">
<label>29</label><mixed-citation publication-type="other" xlink:type="simple"> Monks, P. S., Granier, C., Fuzzi, S., Stohl, A., Williams, M. L., Akimoto, H., Amann, M., Baklanov, A., Baltensperger, U., Bey, I., Blake, N., Blake, R. S., Carslaw, K., Cooper, O. R., Dentener, F., Fowler, D., Fragkou, E., Frost, G. J., Generoso, S., Ginoux, P., Grewe, V., Guenther, A., Hansson, H. C., Henne, S., Hjorth, J., Hofzumahaus, A., Huntrieser, H., Isaksen, I. S. A., Jenkin, M. E., Kaiser, J., Kanakidou, M., Klimont, Z., Kulmala, M., Laj, P., Lawrence, M. G., Lee, J. D., Liousse, C., Maione, M., McFiggans, G., Metzger, A., Mieville, A., Moussiopoulos, N., Orlando, J. J., O&apos;Dowd, C. D., Palmer, P. I., Parrish, D. D., Petzold, A., Platt, U., Poeschl, U., Prevot, A. S. H., Reeves, C. E., Reimann, S., Rudich, Y., Sellegri, K., Steinbrecher, R., Simpson, D., ten Brink, H., Theloke, J., van der Werf, G. R., Vautard, R., Vestreng, V., Vlachokostas, C., and von Glasow, R.: Atmospheric composition change â€“ global and regional air quality, Atmos. Environ., 43, 5268â€“5350, http://dx.doi.org/10.1016/j.atmosenv.2009.08.021doi:10.1016/j.atmosenv.2009.08.021, 2009. </mixed-citation>
</ref>
<ref id="ref30">
<label>30</label><mixed-citation publication-type="other" xlink:type="simple"> Nel, A.: Air Pollution-Related Illness: Effects of Particles, Science, 308, 804â€“806, http://dx.doi.org/10.1126/science.1108752doi:10.1126/science.1108752, 2005. </mixed-citation>
</ref>
<ref id="ref31">
<label>31</label><mixed-citation publication-type="other" xlink:type="simple"> Nieddu, G., Chessa, I., Canu, A., Pellizzaro, G., Sirca, C., and Vargiu, G.: Pollen emission from olive trees and concentrations of airborne pollen in an urban area of North Sardinia, Aerobiologia, 13, 235â€“242, http://dx.doi.org/10.1007/bf02694491doi:10.1007/bf02694491, 1997. </mixed-citation>
</ref>
<ref id="ref32">
<label>32</label><mixed-citation publication-type="other" xlink:type="simple"> OrdÃ³Ã±ez, C., Mathis, H., Furger, M., Henne, S., HÃ¼glin, C., Staehelin, J., and PrÃ©vÃ´t, A. S. H.: Changes of daily surface ozone maxima in Switzerland in all seasons from 1992 to 2002 and discussion of summer 2003, Atmos. Chem. Phys., 5, 1187â€“1203, http://dx.doi.org/10.5194/acp-5-1187-2005doi:10.5194/acp-5-1187-2005, 2005. </mixed-citation>
</ref>
<ref id="ref33">
<label>33</label><mixed-citation publication-type="other" xlink:type="simple"> Pearce, J. L., Beringer, J., Nicholls, N., Hyndman, R. J., and Tapper, N. J.: Quantifying the influence of local meteorology on air quality using generalized additive models, Atmos. Environ., 45, 1328â€“1336, http://dx.doi.org/10.1016/j.atmosenv.2010.11.051doi:10.1016/j.atmosenv.2010.11.051, 2011. </mixed-citation>
</ref>
<ref id="ref34">
<label>34</label><mixed-citation publication-type="other" xlink:type="simple"> PÃ©rez, N., Pey, J., Castillo, S., Viana, M., Alastuey, A., and Querol, X.: Interpretation of the variability of levels of regional background aerosols in the Western Mediterranean, Sci. Total Environ., 407, 527â€“540, http://dx.doi.org/10.1016/j.scitotenv.2008.09.006doi:10.1016/j.scitotenv.2008.09.006, 2008. </mixed-citation>
</ref>
<ref id="ref35">
<label>35</label><mixed-citation publication-type="other" xlink:type="simple"> Putaud, J.-P., Van Dingenen, R., Alastuey, A., Bauer, H., Birmili, W., Cyrys, J., Flentje, H., Fuzzi, S., Gehrig, R., Hansson, H. C., Harrison, R. M., Herrmann, H., Hitzenberger, R., HÃ¼glin, C., Jones, A. M., Kasper-Giebl, A., Kiss, G., Kousa, A., Kuhlbusch, T. A. J., LÃ¶schau, G., Maenhaut, W., Molnar, A., Moreno, T., Pekkanen, J., Perrino, C., Pitz, M., Puxbaum, H., Querol, X., Rodriguez, S., Salma, I., Schwarz, J., Smolik, J., Schneider, J., Spindler, G., ten Brink, H., Tursic, J., Viana, M., Wiedensohler, A., and Raes, F.: A European aerosol phenomenology â€“ 3: Physical and chemical characteristics of particulate matter from 60 rural, urban, and kerbside sites across Europe, Atmos. Environ., 44, 1308â€“1320, http://dx.doi.org/10.1016/j.atmosenv.2009.12.011doi:10.1016/j.atmosenv.2009.12.011, 2010. </mixed-citation>
</ref>
<ref id="ref36">
<label>36</label><mixed-citation publication-type="other" xlink:type="simple"> Querol, X., Alastuey, A., RodrÃ­guez, S., Viana, M. M., ArtÃ­Ã±ano, B., Salvador, P., Mantilla, E., do Santos, S. G., Patier, R. F., de La Rosa, J., de la Campa, A. S., MenÃ©ndez, M., and Gil, J. J.: Levels of particulate matter in rural, urban and industrial sites in Spain, Sci. Total Environ., 334â€“335, 359â€“376, http://dx.doi.org/10.1016/j.scitotenv.2004.04.036doi:10.1016/j.scitotenv.2004.04.036, 2004. </mixed-citation>
</ref>
<ref id="ref37">
<label>37</label><mixed-citation publication-type="other" xlink:type="simple"> Querol, X., Alastuey, A., Moreno, T., Viana, M. M., Castillo, S., Pey, J., RodrÃ­guez, S., ArtiÃ±ano, B., Salvador, P., SÃ¡nchez, M., Garcia Dos Santos, S., Herce Garraleta, M. D., Fernandez-Patier, R., Moreno-Grau, S., Negral, L., MinguillÃ³n, M. C., Monfort, E., Sanz, M. J., Palomo-MarÃ­n, R., Pinilla-Gil, E., Cuevas, E., de la Rosa, J., and SÃ¡nchez de la Campa, A.: Spatial and temporal variations in airborne particulate matter (PM$_10$ and PM$_2.5)$ across Spain 1999â€“2005, Atmos. Environ., 42, 3964â€“3979, http://dx.doi.org/10.1016/j.atmosenv.2006.10.071doi:10.1016/j.atmosenv.2006.10.071, 2008. </mixed-citation>
</ref>
<ref id="ref38">
<label>38</label><mixed-citation publication-type="other" xlink:type="simple"> Querol, X., Viana, M., Alastuey, A., Moreno, T., Gonzalez, A., Pallares, M., and Jimenez, S.: Niveles, Composicion y Fuentes de PM$_10$, PM$_2.5$ y PM$_1$ en Espana: Cantabria, Castilla LeÃ³n, Madrid y Melilla Instituto de DiagnÃ³stico Ambiental y Estudios del Agua (IDAEA-CSIC), Ministerio de Medio Ambiente, Madrid, 2009. </mixed-citation>
</ref>
<ref id="ref39">
<label>39</label><mixed-citation publication-type="other" xlink:type="simple"> R Development Core Team: R: A language and environment for statistical computing, R Foundation for Statistical Computing, Vienna, Austria, ISBN 3-900051-07-0, available at: http://www.R-project.org/, 2012. </mixed-citation>
</ref>
<ref id="ref40">
<label>40</label><mixed-citation publication-type="other" xlink:type="simple"> Rao, S. T., Zurbenko, I. G., Neagu, R., Porter, P. S., Ku, J. Y., and Henry, R. F.: Space and time scales in ambient ozone data, B. Am. Meteorol. Soc., 78, 2153â€“2166, http://dx.doi.org/10.1175/1520-0477(1997)078&lt;2153:satsia&gt;2.0.co;2doi:10.1175/1520-0477(1997)078&lt;2153:satsia&gt;2.0.co;2, 1997. </mixed-citation>
</ref>
<ref id="ref41">
<label>41</label><mixed-citation publication-type="other" xlink:type="simple"> Sandradewi, J., Prevot, A. S. H., Szidat, S., Perron, N., Alfarra, M. R., Lanz, V. A., Weingartner, E., and Baltensperger, U.: Using aerosol light absorption measurements for the quantitative determination of wood burning and traffic emission contributions to particulate matter, Environ. Sci. Technol., 42, 3316â€“3323, http://dx.doi.org/10.1021/es702253mdoi:10.1021/es702253m, 2008. </mixed-citation>
</ref>
<ref id="ref42">
<label>42</label><mixed-citation publication-type="other" xlink:type="simple"> Seibert, P., Beyrich, F., Gryning, S.-E., Joffre, S., Rasmussen, A., and Tercier, P.: Review and intercomparison of operational methods for the determination of the mixing height, Atmos. Environ., 34, 1001â€“1027, http://dx.doi.org/10.1016/s1352-2310(99)00349-0doi:10.1016/s1352-2310(99)00349-0, 2000. </mixed-citation>
</ref>
<ref id="ref43">
<label>43</label><mixed-citation publication-type="other" xlink:type="simple"> Spangl, W. and Nagl, C.: Jahresbericht der LuftgÃ¼temessungen in Ã–sterrreich 2009, Umweltbundesamt, ViennaREP-0261, 2010. </mixed-citation>
</ref>
<ref id="ref44">
<label>44</label><mixed-citation publication-type="other" xlink:type="simple"> Stach, A., Emberlin, J., Smith, M., Adams-Groom, B., and Myszkowska, D.: Factors that determine the severity of Betula spp. pollen seasons in Poland (PoznaÃ± and Krakow) and the United Kingdom (Worcester and London), International J. Biometeorology, 52, 311â€“321, http://dx.doi.org/10.1007/s00484-007-0127-2doi:10.1007/s00484-007-0127-2, 2008. </mixed-citation>
</ref>
<ref id="ref45">
<label>45</label><mixed-citation publication-type="other" xlink:type="simple"> Szidat, S., Prevot, A. S. H., Sandradewi, J., Alfarra, M. R., Synal, H.-A., Wacker, L., and Baltensperger, U.: Dominant impact of residential wood burning on particulate matter in Alpine valleys during winter, Geophys. Res. Lett., 34, L05820, http://dx.doi.org/10.1029/2006gl028325doi:10.1029/2006gl028325, 2007. </mixed-citation>
</ref>
<ref id="ref46">
<label>46</label><mixed-citation publication-type="other" xlink:type="simple"> Tong, Y. Y. and Lighthart, B.: The annual bacterial particle concentration and size distribution in the ambient atmosphere in a rural area of the Willamette valley, Oregon, Aerosol Sci. Technol., 32, 393â€“403, http://dx.doi.org/10.1080/027868200303533doi:10.1080/027868200303533, 2000. </mixed-citation>
</ref>
<ref id="ref47">
<label>47</label><mixed-citation publication-type="other" xlink:type="simple"> Vardoulakis, S. and Kassomenos, P.: Sources and factors affecting PM$_10$ levels in two European cities: Implications for local air quality management, Atmos. Environ., 42, 3949â€“3963, http://dx.doi.org/10.1016/j.atmosenv.2006.12.021doi:10.1016/j.atmosenv.2006.12.021, 2008. </mixed-citation>
</ref>
<ref id="ref48">
<label>48</label><mixed-citation publication-type="other" xlink:type="simple"> Venables, W. N. and Ripley, B. D.: Modern Applied Statistics with S, Springer, New York, 2002. </mixed-citation>
</ref>
<ref id="ref49">
<label>49</label><mixed-citation publication-type="other" xlink:type="simple"> Winiwarter, W., Bauer, H., Caseiro, A., and Puxbaum, H.: Quantifying emissions of primary biological aerosol particle mass in Europe, Atmos. Environ., 43, 1403â€“1409, http://dx.doi.org/10.1016/j.atmosenv.2008.01.037doi:10.1016/j.atmosenv.2008.01.037, 2009. </mixed-citation>
</ref>
<ref id="ref50">
<label>50</label><mixed-citation publication-type="other" xlink:type="simple"> Wise, E. K. and Comrie, A. C.: Extending the Kolmogorov-Zurbenko filter: Application to ozone, particulate matter, and meteorological trends, J. Air Waste Manage. Assoc., 55, 1208â€“1216, 2005. </mixed-citation>
</ref>
<ref id="ref51">
<label>51</label><mixed-citation publication-type="other" xlink:type="simple"> Wood, S.: Generalized Additive Models: an Introduction with R, Chapman &amp; Hall/CRC, Boca Raton, 2006. </mixed-citation>
</ref>
<ref id="ref52">
<label>52</label><mixed-citation publication-type="other" xlink:type="simple"> Wood, S.: Fast stable restricted maximum likelihood and marginal likelihood estimation of semiparametric generalized linear models, J. Roy. Statistical Society: Series B (Statistical Methodology), 73, 3â€“36, http://dx.doi.org/10.1111/j.1467-9868.2010.00749.xdoi:10.1111/j.1467-9868.2010.00749.x, 2011. </mixed-citation>
</ref>
<ref id="ref53">
<label>53</label><mixed-citation publication-type="other" xlink:type="simple"> World Health Organisation: Health Aspects of Air Pollution; Results from the WHO project &quot;Systematic review of health apsects of air pollution in Europe&quot; World Health Organisation, CopenhagenE83080, 2004. </mixed-citation>
</ref>
<ref id="ref54">
<label>54</label><mixed-citation publication-type="other" xlink:type="simple"> Yan, X. and Su, X.: Linear Regression Analysis: Theory and Computing, World Scientific, Singapore, 2009. </mixed-citation>
</ref>
<ref id="ref55">
<label>55</label><mixed-citation publication-type="other" xlink:type="simple"> Yttri, K. E., Simpson, D., Stenström, K., Puxbaum, H., and Svendby, T.: Source apportionment of the carbonaceous aerosol in Norway â€“ quantitative estimates based on 14C, thermal-optical and organic tracer analysis, Atmos. Chem. Phys., 11, 9375â€“9394, http://dx.doi.org/10.5194/acp-11-9375-2011doi:10.5194/acp-11-9375-2011, 2011. </mixed-citation>
</ref>
<ref id="ref56">
<label>56</label><mixed-citation publication-type="other" xlink:type="simple"> Zelenka, M. P.: An analysis of the meteorological parameters affecting ambient concentrations of acid aerosols in Uniontown, Pennsylvania, Atmos. Environ., 31, 869â€“878, http://dx.doi.org/10.1016/s1352-2310(96)00237-3doi:10.1016/s1352-2310(96)00237-3, 1997. </mixed-citation>
</ref>
</ref-list>
</back>
</article>