<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD Journal Publishing DTD v3.0 20080202//EN" "https://jats.nlm.nih.gov/nlm-dtd/publishing/3.0/journalpublishing3.dtd">
<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" article-type="research-article" dtd-version="3.0" xml:lang="en">
<front>
<journal-meta>
<journal-id journal-id-type="publisher">BG</journal-id>
<journal-title-group>
<journal-title>Biogeosciences</journal-title>
<abbrev-journal-title abbrev-type="publisher">BG</abbrev-journal-title>
<abbrev-journal-title abbrev-type="nlm-ta">Biogeosciences</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1726-4189</issn>
<publisher><publisher-name>Copernicus Publications</publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/bg-6-1655-2009</article-id>
<title-group>
<article-title>Concentrations and fluxes of biogenic volatile organic compounds above a Mediterranean macchia ecosystem in western Italy</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Davison</surname>
<given-names>B.</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>Taipale</surname>
<given-names>R.</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>Langford</surname>
<given-names>B.</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>Misztal</surname>
<given-names>P.</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>Fares</surname>
<given-names>S.</given-names>
</name>
<xref ref-type="aff" rid="aff5">
<sup>5</sup>
</xref>
<xref ref-type="aff" rid="aff6">
<sup>6</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Matteucci</surname>
<given-names>G.</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>Loreto</surname>
<given-names>F.</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>Cape</surname>
<given-names>J. N.</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>Rinne</surname>
<given-names>J.</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>Hewitt</surname>
<given-names>C. N.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>University of Helsinki, Department of Physics, P.O. Box 64, 00014 University of Helsinki, Finland</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>Centre for Ecology &amp; Hydrology, Bush Estate, Penicuik, Midlothian EH26 0QB, UK</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>School of Chemistry, University of Edinburgh, Edinburgh EH9 3JJ, UK</addr-line>
</aff>
<aff id="aff5">
<label>5</label>
<addr-line>National Research Council, Institute of Agro-environmental and Forest Biology, Via Salaria km. 29300, 00016 Monterotondo Scalo, Rome, Italy</addr-line>
</aff>
<aff id="aff6">
<label>6</label>
<addr-line>now at: University of California, Department of Environmental Science, Policy, and Management, 137 Mulford Hall, Berkeley, CA 94720, USA</addr-line>
</aff>
<pub-date pub-type="epub">
<day>14</day>
<month>08</month>
<year>2009</year>
</pub-date>
<volume>6</volume>
<issue>8</issue>
<fpage>1655</fpage>
<lpage>1670</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2009 B. Davison et al.</copyright-statement>
<copyright-year>2009</copyright-year>
<license license-type="open-access">
<license-p>This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit <ext-link ext-link-type="uri"  xlink:href="https://creativecommons.org/licenses/by/3.0/">https://creativecommons.org/licenses/by/3.0/</ext-link></license-p>
</license>
</permissions>
<self-uri xlink:href="https://bg.copernicus.org/articles/6/1655/2009/bg-6-1655-2009.html">This article is available from https://bg.copernicus.org/articles/6/1655/2009/bg-6-1655-2009.html</self-uri>
<self-uri xlink:href="https://bg.copernicus.org/articles/6/1655/2009/bg-6-1655-2009.pdf">The full text article is available as a PDF file from https://bg.copernicus.org/articles/6/1655/2009/bg-6-1655-2009.pdf</self-uri>
<abstract>
<p>Emission rates and concentrations of biogenic volatile organic compounds
(BVOCs) were measured at a Mediterranean coastal site at Castelporziano,
approximately 25 km south-west of Rome, between 7 May and 3 June 2007, as
part of the ACCENT-VOCBAS field campaign on biosphere–atmosphere
interactions. Concentrations and emission rates were measured using the
disjunct eddy covariance (DEC) method utilizing three different proton
transfer reaction mass spectrometers (PTR-MS) so allowing a comparison
between the instruments. The high resolution data from the PTR-MS
instruments considerably enhances the original BEMA measurements of the mid
1990s.
&lt;br&gt;&lt;br&gt;
Depending on the measurement period, the volume mixing ratios were in the
range 1.6–3.5 ppbv for methanol, 0.44–1.3 ppbv for acetaldehyde,
0.96–2.1 ppbv for acetone, 0.10–0.14 ppbv for isoprene, and 0.13–0.30 ppbv for
monoterpenes. A diurnal cycle in mixing ratios was apparent with daytime
maxima for methanol, acetaldehyde, acetone, and isoprene. The fluxes ranged
from 370–440 μg m&lt;sup&gt;&amp;minus;2&lt;/sup&gt; h&lt;sup&gt;&amp;minus;1&lt;/sup&gt; for methanol,
180–360 μg m&lt;sup&gt;&amp;minus;2&lt;/sup&gt; h&lt;sup&gt;&amp;minus;1&lt;/sup&gt; for acetaldehyde, 180–450 μg m&lt;sup&gt;&amp;minus;2&lt;/sup&gt; h&lt;sup&gt;&amp;minus;1&lt;/sup&gt; for
acetone, 71–290 μg m&lt;sup&gt;&amp;minus;2&lt;/sup&gt; h&lt;sup&gt;&amp;minus;1&lt;/sup&gt; for isoprene, and
240–860 μg m&lt;sup&gt;&amp;minus;2&lt;/sup&gt; h&lt;sup&gt;&amp;minus;1&lt;/sup&gt; for monoterpenes. From the measured flux data (7 May–3
June) an average basal emission rate for the Macchia vegetation was
calculated of 430 μg m&lt;sup&gt;&amp;minus;2&lt;/sup&gt; h&lt;sup&gt;&amp;minus;1&lt;/sup&gt; for isoprene and
1100 μg m&lt;sup&gt;&amp;minus;2&lt;/sup&gt; h&lt;sup&gt;&amp;minus;1&lt;/sup&gt; for monoterpenes.</p>
</abstract>
<counts><page-count count="16"/></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"> Ammann, C., Brunner, A., Spirig, C., and Neftel, A.: Technical note: Water vapour concentration and flux measurements with PTR-MS, Atmos. Chem. Phys., 6, 4643–4651, 2006. </mixed-citation>
</ref>
<ref id="ref2">
<label>2</label><mixed-citation publication-type="other" xlink:type="simple"> Beauchamp, J., Wisthaler, A., Hansel, A., Kleist, E., Miebach, M., Niinemets, U., Schurr, U., and Wildt, J.: Ozone induced emissions of biogenic VOC from tobacco: Relationships between ozone uptake and emission of LOX products, Plant Cell Environ., 28, 1334–1343, 2005. </mixed-citation>
</ref>
<ref id="ref3">
<label>3</label><mixed-citation publication-type="other" xlink:type="simple"> Bertin, N., Staudt, M., Hansen, U., Seufert, G., Ciccioli, P., Foster, P., Fugit, J. L., and Torres, L.: Diurnal and seasonal course of monoterpene emissions from \textitQuercus ilex (L.) under natural conditions – application of light and temperature algorithms, Atmos. Environ., 31(SI), 135–144, 1997. </mixed-citation>
</ref>
<ref id="ref4">
<label>4</label><mixed-citation publication-type="other" xlink:type="simple"> Brunner, A., Ammann, C., Neftel, A., and Spirig, C.: Methanol exchange between grassland and the atmosphere. Biogeosciences, 4, 395–410, 2007 </mixed-citation>
</ref>
<ref id="ref5">
<label>5</label><mixed-citation publication-type="other" xlink:type="simple"> Ciccioli, P., Fabozzi, C., Brancaleoni, E., Cecinato, A., Frattoni, M., Cieslik, S., Kotzias, D., Seufert, G., Foster, P., and Steinbrecher, R.: Biogenic emission from the Mediterranean pseudosteppe ecosystem present in Castelporziano, Atmos. Environ., 31(SI), 167–175, 1997. </mixed-citation>
</ref>
<ref id="ref6">
<label>6</label><mixed-citation publication-type="other" xlink:type="simple"> Davison, B., Brunner, A., Ammann, C., Spirig, C., Jocher, M., and Neftel, A.: Cut induced VOC emissions from agricultural grasslands. Plant Biol., 10, 76–85, https://doi.org/10.1055/s-2007-965043, 2008. </mixed-citation>
</ref>
<ref id="ref7">
<label>7</label><mixed-citation publication-type="other" xlink:type="simple"> de Gouw, J. and Warneke, C.: Measurements of volatile organic compounds in the Earth&apos;s atmosphere using proton-transfer-reaction mass spectrometry, Mass Spectrom. Rev., 26, 223–257, 2007. </mixed-citation>
</ref>
<ref id="ref8">
<label>8</label><mixed-citation publication-type="other" xlink:type="simple"> Fall, R. and Benson, A. A.: Leaf methanol – the simplest natural product from plants, Trends Plant Sci., 1, 296–301, 1996. </mixed-citation>
</ref>
<ref id="ref9">
<label>9</label><mixed-citation publication-type="other" xlink:type="simple"> Fall, R.: Abundant oxygenates in the atmosphere: A biochemical perspective, Chem. Rev., 103, 4941–4951, 2003. </mixed-citation>
</ref>
<ref id="ref10">
<label>10</label><mixed-citation publication-type="other" xlink:type="simple"> Fares, S., Mereu, S., Scarascia-Mugnozza, G., Vitale, M., Frattoni, M., Ciccioli, P., and Loreto, F.: The ACCENT-VOCBAS field campaign on biosphere-atmosphere interactions in a Mediterranean ecosystem of Castelporziano (Rome): site characteristics, climatic and meteorological conditions, and eco-physiology of vegetation, Biogeosciences, 6, 1043–1058, 2009 2009. </mixed-citation>
</ref>
<ref id="ref11">
<label>11</label><mixed-citation publication-type="other" xlink:type="simple"> Folkers, A., Huve, K., Ammann, C., Dindorf, T., Kesselmeier, J., Kleist, E., Kuhn, U., Uerlings, R., and Wildt, J.: Methanol emissions from deciduous tree species: Dependence on temperature and light intensity, Plant Biol., 10, 65–75, 2008. </mixed-citation>
</ref>
<ref id="ref12">
<label>12</label><mixed-citation publication-type="other" xlink:type="simple"> Fowler, D.: Ground-level ozone in the 21st century: future trends, impacts and policy implications, Royal Society, London, UK, 2008. </mixed-citation>
</ref>
<ref id="ref13">
<label>13</label><mixed-citation publication-type="other" xlink:type="simple"> Fukui, Y. and Doskey, P. V.: Air-surface exchange of non-methane organic compounds at a grassland site: Seasonal variations and stressed emissions, J. Geophys. Res.-Atmos., 103, 13153–13168, 1998. </mixed-citation>
</ref>
<ref id="ref14">
<label>14</label><mixed-citation publication-type="other" xlink:type="simple"> Garratt, J. R.: The atmospheric boundary layer, Cambridge University Press, Cambridge, UK, pp. 316, 1994. </mixed-citation>
</ref>
<ref id="ref15">
<label>15</label><mixed-citation publication-type="other" xlink:type="simple"> Göckede, M., Rebmann, C., and Foken, T.: A combination of quality assessment tools for eddy covariance measurements with footprint modelling for the characterisation of complex sites, Agr. For. Meteorol., 127, 175–188, 2004. </mixed-citation>
</ref>
<ref id="ref16">
<label>16</label><mixed-citation publication-type="other" xlink:type="simple"> Goulden, M. L., Munger, J. W., Fan, S.-M., Daube, B. C., and Wofsy, S. C.: Measurements of carbon sequestration by long-term eddy covariance: methods and a critical evaluation of accuracy, Global Change Biol., 2, 169–182, 1996. </mixed-citation>
</ref>
<ref id="ref17">
<label>17</label><mixed-citation publication-type="other" xlink:type="simple"> Grote, R., Mayrhofer, S., Fischbach, R. J., Steinbrecher, R., Staudt, M., and Schnitzler, J. P.: Process-based modelling of isoprenoid emissions from evergreen leaves of \textitquercus ilex (l.), Atmos. Environ., 40, S152–S165, 2006. </mixed-citation>
</ref>
<ref id="ref18">
<label>18</label><mixed-citation publication-type="other" xlink:type="simple"> Guenther, A. B., Zimmerman, P. R., Harley, P. C., Monson, R. K., and Fall, R.: Isoprene and monoterpene emission rate variability: model evaluations and sensitivity analyses, J. Geophys. Res., 98(D7), 12609–12617, 1993. </mixed-citation>
</ref>
<ref id="ref19">
<label>19</label><mixed-citation publication-type="other" xlink:type="simple"> Guenther, A., Hewitt, C. N., Erickson, D., Fall, R., Geron, C., Graedel, T., Harley, P., Klinger, L., Lerdau, M., McKay, W. A., Pierce, T., Scholes, B., Steinbrecher, R., Tallamraju, R., Taylor, J., and Zimmerman, P.: A global model of natural volatile organic compound emissions, J. Geophys. Res., 100(D5), 8873–8892, 1995. </mixed-citation>
</ref>
<ref id="ref20">
<label>20</label><mixed-citation publication-type="other" xlink:type="simple"> Guenther, A.: Seasonal and spatial variations in natural volatile organic compound emissions. Ecol. Appl., 7, 34–45, 1997. </mixed-citation>
</ref>
<ref id="ref21">
<label>21</label><mixed-citation publication-type="other" xlink:type="simple"> Hakola, H., Rinne, J., and Laurila, T.: Hydrocarbon emission rates of tea-leafed willow (Salix phylicifolia), Silver birch (Betula pendula) and European aspen (Populus tremula), Atmos. Environ., 32, 1825–1833, 1998. </mixed-citation>
</ref>
<ref id="ref22">
<label>22</label><mixed-citation publication-type="other" xlink:type="simple"> Hansel, A., Jordan, A., Holzinger, R., Prazeller, P., Vogel, W., and Lindinger, W.: Proton transfer reaction mass spectrometry: on-line trace gas analysis at the ppb level, Int. J. Mass Spectrom., 149–150, 609–619, 1995. </mixed-citation>
</ref>
<ref id="ref23">
<label>23</label><mixed-citation publication-type="other" xlink:type="simple"> Hayward, S., Tani, A., Owen, S. M., and Hewitt, C. N.: On-line analysis of volatile organic compound emissions from Sitka spuce (\textitPicea sitchensis). Tree Physiology, 24, 721–728, 2004. </mixed-citation>
</ref>
<ref id="ref24">
<label>24</label><mixed-citation publication-type="other" xlink:type="simple"> Helmig, D., Klinger, L.F., Guenther, A., Vierling, L., Geron, C., and Zimmerman, P.: Biogenic volatile organic compound emission (BVOCs): II. Landscape flux potentials from three continental sites in the US, Chemosphere, 38(9), 2189–2204, 1999. </mixed-citation>
</ref>
<ref id="ref25">
<label>25</label><mixed-citation publication-type="other" xlink:type="simple"> Hewitt, C. N., Hayward, S., and Tani, A. Application of proton transfer reaction mass spectrometry for the monitoring and measurement of volatile organic compounds in the atmosphere, Environ. Monitor., 5, 1–7, 2003. </mixed-citation>
</ref>
<ref id="ref26">
<label>26</label><mixed-citation publication-type="other" xlink:type="simple"> Holzinger, R., Sandoval-Soto, L., Rottenberger, S., Crutzen, P. J., and Kesselmeier, J.: Emissions of volatile organic compounds from quercus ilex l. Measured by proton transfer reaction mass spectrometry under different environmental conditions, J. Geophys. Res.-Atmos., 105, 20573–20579, 2000. </mixed-citation>
</ref>
<ref id="ref27">
<label>27</label><mixed-citation publication-type="other" xlink:type="simple"> Horst, T. W.: A simple formula for attenuation of eddy fluxes measured with first-order-response scalar sensors, Bound.-Layer Meteorol., 82, 219–233, 1997. </mixed-citation>
</ref>
<ref id="ref28">
<label>28</label><mixed-citation publication-type="other" xlink:type="simple"> Huve, K., Christ, M. M., Kleist, E., Uerlings, R., Niinemets, U., Walter, A., and Wildt, J.: Simultaneous growth and emission measurements demonstrate an interactive control of methanol release by leaf expansion and stomata, J. Exp. Bot., 58(7), 1783–1793, 2007. </mixed-citation>
</ref>
<ref id="ref29">
<label>29</label><mixed-citation publication-type="other" xlink:type="simple"> Karl, T. G., Spirig, C., Rinne, J., Stroud, C., Prevost, P., Greenberg, J., Fall, R., and Guenther, A.: Virtual disjunct eddy covariance measurements of organic compound fluxes from a subalpine forest using proton transfer reaction mass spectrometry, Atmos. Chem. Phys., 2, 279–291, 2002. </mixed-citation>
</ref>
<ref id="ref30">
<label>30</label><mixed-citation publication-type="other" xlink:type="simple"> Karl, T., Harley, P., Guenther, A., Rasmussen, R., Baker, B., Jardine, K., and Nemitz, E.: The bi-directional exchange of oxygenated vocs between a Loblolly pine (\textitPinus Taeda) plantation and the atmosphere, Atmospheric Chemistry And Physics, 5, 3015–3031, 2005. </mixed-citation>
</ref>
<ref id="ref31">
<label>31</label><mixed-citation publication-type="other" xlink:type="simple"> Kesselmeier, J., Bode, K., Hofmann, U., Müller, H., Schäfer, L., Wolf, A., Ciccioli, P., Brancaleoni, E., Cecinato, A., Frattoni, M., Foster, P., Ferrari, C., Jacob, V., Fugit, J. L., Dutaur, L., Simon, V., and Torres, L.: Emission of short chained organic acids, aldehydes and monoterpenes from \textitQuercus ilex L. and \textitPinus pinea L. in relation to physiological activities, carbon budget and emission algorithms, Atmos. Environ., 31(SI), 119–133, 1997. </mixed-citation>
</ref>
<ref id="ref32">
<label>32</label><mixed-citation publication-type="other" xlink:type="simple"> Kuhn, U., Rottenberger, S., Biesenthal, T., Wolf, A., Schebeske, G., Ciccioli, P., and Kesselmeier, J.,: Strong correlation between isoprene emission and gross photosynthetic capacity during leaf phenology of the tropical tree species Hymenaea courbaril with fundamental changes in volatile organic compounds emission composition during early leaf development, Plant Cell Environ., 27(12), 1469–1485, 2004. </mixed-citation>
</ref>
<ref id="ref33">
<label>33</label><mixed-citation publication-type="other" xlink:type="simple"> Lindinger, W., Hansel, A., and Jordan, A.: On-line monitoring of volatile organic compounds at pptv levels by means of Proton-Transfer-Reaction Mass Spectrometry (PTR-MS) – Medical applications, food control and environmental research, Int. J. Mass Spectrom., 173, 191–241, 1998. </mixed-citation>
</ref>
<ref id="ref34">
<label>34</label><mixed-citation publication-type="other" xlink:type="simple"> Loreto, F., Barta, C., Brilli, F., and Nogues, I.: On the induction of volatile organic compound emissions by plants as consequence of wounding or fluctuations of light and temperature, Plant Cell Environ., 29, 1820–1828, 2006. </mixed-citation>
</ref>
<ref id="ref35">
<label>35</label><mixed-citation publication-type="other" xlink:type="simple"> Mudgett, M. B., and Clarke, S.: Characterization of plant l-isoaspartyl methyltransferases that may be involved in seed survival – purification, cloning, and sequence-analysis of the wheat-germ enzyme, Biochemistry, 32, 11100–11111, 1993. </mixed-citation>
</ref>
<ref id="ref36">
<label>36</label><mixed-citation publication-type="other" xlink:type="simple"> Nemecek-Marshall, M., MacDonald, R. C., Franzen, J. J., Wojciechowski, C. L. and Fall, R.: Methanol Emission from Leaves (Enzymatic Detection of Gas-Phase Methanol and Relation of Methanol Fluxes to Stomatal Conductance and Leaf Development), Plant Physiol., 108, 4, 1359–1368. 1995 </mixed-citation>
</ref>
<ref id="ref37">
<label>37</label><mixed-citation publication-type="other" xlink:type="simple"> Niinemets, U., Loreto, F., and Reichstein, M.: Physiological and physicochemical controls on foliar volatile organic compund emissions. Trends in plant science, 4, 180–186, 2004. </mixed-citation>
</ref>
<ref id="ref38">
<label>38</label><mixed-citation publication-type="other" xlink:type="simple"> Owen, S. M., Boissard, C., Street, R. A., Duckham, S. C., Csiky, O., and Hewitt, C. N.: Screening of 18 Mediterranean plant species for volatile organic compound emissions, Atmos. Environ., 31(SI), 101–117, 1997. %</mixed-citation>
</ref>
<ref id="ref39">
<label>39</label><mixed-citation publication-type="other" xlink:type="simple"> %Owen, S. M.: VOC emissions from vegetation in the Mediterranean region, PhD, %Environmental Science Department, Lancaster University, Lancaster, UK, 1998. % %</mixed-citation>
</ref>
<ref id="ref40">
<label>40</label><mixed-citation publication-type="other" xlink:type="simple"> %Owen, S. M., Boissard, C., Hagenlocher, B., and Hewitt, C. N.: Field studies %of isoprene emissions from vegetation in the northwest mediterranean region, %J. Geophys. Res.-Atmos., 103, 25499–25511, 1998. </mixed-citation>
</ref>
<ref id="ref41">
<label>41</label><mixed-citation publication-type="other" xlink:type="simple"> Owen, S. M., Boissard, C., and Hewitt, C. N.: Volatile organic compounds (vocs) emitted from 40 mediterranean plant species: Voc speciation and extrapolation to habitat scale, Atmos. Environ., 35, 5393–5409, 2001. </mixed-citation>
</ref>
<ref id="ref42">
<label>42</label><mixed-citation publication-type="other" xlink:type="simple"> Owen, S. M., Harley, P., Guenther, A., and Hewitt, C. N.: Light dependency of VOC emissions from selected Mediterranean plant species, Atmos. Environ., 36, 3147–3159, 2002. </mixed-citation>
</ref>
<ref id="ref43">
<label>43</label><mixed-citation publication-type="other" xlink:type="simple"> Penuelas, J., Filella, I., Stefanescu, C., and Llusia, J.: Caterpillars of Euphydryas aurinia (Lepidoptera: Nymphalidae) feeding on Succisa pratensis leaves induce large foliar emissions of methanol, New Phytol., 167, 851–857, 2005. </mixed-citation>
</ref>
<ref id="ref44">
<label>44</label><mixed-citation publication-type="other" xlink:type="simple"> Rinne, H. J. I., Guenther, A. B., Warneke, C., de Gouw, J. A., and Luxembourg, S. L.: Disjunct eddy covariance technique for trace gas flux measurements, Geophys. Res. Lett., 28(16), 3139–3142, 2001. </mixed-citation>
</ref>
<ref id="ref45">
<label>45</label><mixed-citation publication-type="other" xlink:type="simple"> Rinne, J., Taipale, R., Markkanen, T., Ruuskanen, T. M., Hellén, H., Kajos, M. K., Vesala, T., and Kulmala, M.: Hydrocarbon fluxes above a Scots pine forest canopy: measurements and modeling, Atmos. Chem. Phys., 7, 3361–3372, 2007. </mixed-citation>
</ref>
<ref id="ref46">
<label>46</label><mixed-citation publication-type="other" xlink:type="simple"> Schade, G. W. and Custer, T. G.: OVOC emissions from agricultural soil in northern Germany during the 2003 European heat wave, Atmos. Environ., 38, 6105–6114, 2004. </mixed-citation>
</ref>
<ref id="ref47">
<label>47</label><mixed-citation publication-type="other" xlink:type="simple"> Schade, G. W. and Goldstein, A. H.: Seasonal measurements of acetone and methanol: Abundances and implications for atmospheric budgets, Global Biogeochem. Cy., 20, 2006. %</mixed-citation>
</ref>
<ref id="ref48">
<label>48</label><mixed-citation publication-type="other" xlink:type="simple"> %Schäfer, L. R., Gabriel, H., Muller, J., Wolf, A., and Kesselmeier, J.: Emission of %short chained organic acids and aldehydes in relation to physiological and %apoplastic ion concentrations in Mediterranean tree species during the %B.E.M.A.-Project, in Report on the 1st BEMA Measuring Campaign at the %Castelparziano, Rome, (Italy), May 1994, EUR 16293 EN, 1994. </mixed-citation>
</ref>
<ref id="ref49">
<label>49</label><mixed-citation publication-type="other" xlink:type="simple"> Seufert, G., Bartzis, J., Bomboi, T., Ciccioli, P., Cieslik, S., Dlugi, R., Foster, P., Hewitt, C. N., Kesselmeier, J., Kotzias, D., Lenz, R., Manes, F., Perez Pastor, R., Steinbrecher, R., Torres, L., Valentini, R., and Versino, B.: An overview of the Castelporziano experiments, Atmos. Environ., 31(SI), 5–17, 1997. </mixed-citation>
</ref>
<ref id="ref50">
<label>50</label><mixed-citation publication-type="other" xlink:type="simple"> Sillman, S.: The relation between ozone, NO&lt;sub&gt;x&lt;/sub&gt; and hydrocarbons in urban and polluted rural environments, Atmos. Environ., 33, 1821–1845, 1999. </mixed-citation>
</ref>
<ref id="ref51">
<label>51</label><mixed-citation publication-type="other" xlink:type="simple"> Simpson, D., Winiwarter, W., Borjesson, G.,Cinderby, S., Ferreiro, A. Guenther, A., Hewitt, C. N., Janson, R., Khalil, A., Owen, S., Pierce, T. E., Puxbaum, H., Shearer, M., Skiba, U., Steinbrecher, R., Tarrason, L., and Oquist, M. G.: Inventorying emissions from Nature in Europe, J. Geophys. Res., 104, 8113–8152, 1999. </mixed-citation>
</ref>
<ref id="ref52">
<label>52</label><mixed-citation publication-type="other" xlink:type="simple"> Spirig, C., Neftel, A., Ammann, C., Dommen, J., Grabmer, W., Thielmann, A., Schaub, A., Beauchamp, J., Wisthaler, A., and Hansel, A.: Eddy covariance flux measurements of biogenic VOCS during echo 2003 using proton transfer reaction mass spectrometry, Atmos. Chem. Phys., 5, 465–481, 2005. </mixed-citation>
</ref>
<ref id="ref53">
<label>53</label><mixed-citation publication-type="other" xlink:type="simple"> Staudt, M., Bertin, N., Hansen, U., Seufert, G., Ciccioli, P., Foster, P., Frenzel, B., and Fugit, J. L.: Seasonal and diurnal patterns of monoterpene emissions from \textitPinus Pinea (L) under field conditions, Atmos. Environ. 31(SI), 145–156, 1997. </mixed-citation>
</ref>
<ref id="ref54">
<label>54</label><mixed-citation publication-type="other" xlink:type="simple"> Staudt, M. and Bertin, N.: Light and temperature dependence of the emission of cyclic and acyclic monoterpenes from Holm Oak (\textitQuercus ilex l.) leaves, Plant Cell Environ., 21, 385–395, 1998. </mixed-citation>
</ref>
<ref id="ref55">
<label>55</label><mixed-citation publication-type="other" xlink:type="simple"> Street, R. A., Owen, S., Duckham, S. C., Boissard, C., and Hewitt, C. N.: Effect of habitat and age on variations in volatile organic compound (VOC) emissions from \textitQuercus ilex and \textitPinus pinea, Atmos. Environ., 31(SI), 89–100, 1997. </mixed-citation>
</ref>
<ref id="ref56">
<label>56</label><mixed-citation publication-type="other" xlink:type="simple"> Taipale, R., Ruuskanen, T. M., Rinne, J., Kajos, M. K., Hakola, H., Pohja, T., and Kulmala, M.: Technical Note: Quantitative long-term measurements of VOC concentrations by PTR-MS – measurement, calibration, and volume mixing ratio calculation methods, Atmos. Chem. Phys., 8, 6681–6698, 2008. </mixed-citation>
</ref>
<ref id="ref57">
<label>57</label><mixed-citation publication-type="other" xlink:type="simple"> Tani, A., Hayward, S., and Hewitt, C. N.: Measurement of monoterpenes and related compounds by proton transfer reaction mass spectrometry, Int. J. Mass Spectrom., 223–224, 561–578, 2003. </mixed-citation>
</ref>
<ref id="ref58">
<label>58</label><mixed-citation publication-type="other" xlink:type="simple"> Valentini, R., Greco, S., Seufert, G., Bertin, N., Ciccioli, P., Cecinato, A., Brancaleoni, E., and Frattoni, M.: Fluxes of biogenic VOC from Mediterranean vegetation by trap enrichment relaxed eddy accumulation, Atmos. Environ., 31(SI), 229–238, 1997. </mixed-citation>
</ref>
<ref id="ref59">
<label>59</label><mixed-citation publication-type="other" xlink:type="simple"> Warneke, C., Luxembourg, S. L., de Gouw, J. A., Rinne, H. J. I., Guenther, A. B., and Fall, R.: Disjunct eddy covariance measurements of oxygenated volatile organic compounds fluxes from an alfalfa field before and after cutting, J. Geophys. Res., 107(D8), 4067, https://doi.org/10.1029/2001JD000594, 2002. </mixed-citation>
</ref>
<ref id="ref60">
<label>60</label><mixed-citation publication-type="other" xlink:type="simple"> Wiberley, A. E., Linskey, A. R., Falbel, T. G., and Sharkey, T. D.: Development of the capacity for isoprene emission in kudzu, Plant Cell Environ., 28(7), 898–905, 2005. </mixed-citation>
</ref>
<ref id="ref61">
<label>61</label><mixed-citation publication-type="other" xlink:type="simple"> Wilkinson, M. J.: Circadian control of isoprene emissions from oil palm. Ph.D. Thesis, Lancaster University, UK, 2006. </mixed-citation>
</ref>
<ref id="ref62">
<label>62</label><mixed-citation publication-type="other" xlink:type="simple"> Zhao, J. and Zhang, R.: Proton transfer reaction rate constants between hydronium ion (H&lt;sub&gt;3&lt;/sub&gt;O$^+$) and volatile organic compounds, Atmos. Environ., 38, 2177–2185, 2004. </mixed-citation>
</ref>
</ref-list>
</back>
</article>