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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-10-789-2010</article-id>
<title-group>
<article-title>Global model simulations of air pollution during the 2003 European heat wave</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Ordóñez</surname>
<given-names>C.</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>Elguindi</surname>
<given-names>N.</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>Stein</surname>
<given-names>O.</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>Huijnen</surname>
<given-names>V.</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>Flemming</surname>
<given-names>J.</given-names>
</name>
<xref ref-type="aff" rid="aff6">
<sup>6</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Inness</surname>
<given-names>A.</given-names>
</name>
<xref ref-type="aff" rid="aff6">
<sup>6</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Flentje</surname>
<given-names>H.</given-names>
</name>
<xref ref-type="aff" rid="aff7">
<sup>7</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Katragkou</surname>
<given-names>E.</given-names>
</name>
<xref ref-type="aff" rid="aff8">
<sup>8</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Moinat</surname>
<given-names>P.</given-names>
</name>
<xref ref-type="aff" rid="aff9">
<sup>9</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Peuch</surname>
<given-names>V.-H.</given-names>
</name>
<xref ref-type="aff" rid="aff9">
<sup>9</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Segers</surname>
<given-names>A.</given-names>
</name>
<xref ref-type="aff" rid="aff5">
<sup>5</sup>
</xref>
<xref ref-type="aff" rid="aff10">
<sup>10</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Thouret</surname>
<given-names>V.</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>Athier</surname>
<given-names>G.</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>van Weele</surname>
<given-names>M.</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>Zerefos</surname>
<given-names>C. S.</given-names>
</name>
<xref ref-type="aff" rid="aff11">
<sup>11</sup>
</xref>
<xref ref-type="aff" rid="aff12">
<sup>12</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Cammas</surname>
<given-names>J.-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>Schultz</surname>
<given-names>M. G.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Laboratoire d&apos;Aérologie, UMR5560, CNRS and Université de Toulouse, Toulouse, France</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Met Office, Atmospheric Dispersion Group, Exeter, UK</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>FZ Jülich, Institute for Chemistry and Dynamics of the Geosphere – 2: Troposphere, Jülich, Germany</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>Max Planck Institute for Meteorology, Hamburg, Germany</addr-line>
</aff>
<aff id="aff5">
<label>5</label>
<addr-line>Royal Netherlands Meteorological Institute (KNMI), De Bilt, The Netherlands</addr-line>
</aff>
<aff id="aff6">
<label>6</label>
<addr-line>European Centre for Medium-Range Weather Forecasts (ECMWF), Reading, UK</addr-line>
</aff>
<aff id="aff7">
<label>7</label>
<addr-line>Deutscher Wetterdienst (DWD), Observatorium Hohenpeißenberg, Germany</addr-line>
</aff>
<aff id="aff8">
<label>8</label>
<addr-line>Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece</addr-line>
</aff>
<aff id="aff9">
<label>9</label>
<addr-line>Météo-France, Centre National de Recherches Météorologiques, Toulouse, France</addr-line>
</aff>
<aff id="aff10">
<label>10</label>
<addr-line>TNO Built Environment and Geosciences, Department of Air Quality and Climate, Utrecht, The Netherlands</addr-line>
</aff>
<aff id="aff11">
<label>11</label>
<addr-line>Laboratory of Climatology and Atmospheric Environment, Faculty of Geology and Geoenvironment, University of Athens, Greece</addr-line>
</aff>
<aff id="aff12">
<label>12</label>
<addr-line>Atmospheric Environment Division, Biomedical Research Foundation of the Academy of Athens, Greece</addr-line>
</aff>
<pub-date pub-type="epub">
<day>26</day>
<month>01</month>
<year>2010</year>
</pub-date>
<volume>10</volume>
<issue>2</issue>
<fpage>789</fpage>
<lpage>815</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/10/789/2010/acp-10-789-2010.pdf">The full text article is available as a PDF file from http://www.atmos-chem-phys.net/10/789/2010/acp-10-789-2010.pdf</self-uri>
<abstract>
<p>Three global Chemistry Transport Models – MOZART, MOCAGE, and
TM5 – as well as MOZART coupled to the IFS meteorological model including
assimilation of ozone (O&lt;sub&gt;3&lt;/sub&gt;) and carbon monoxide (CO)
satellite column retrievals, have been compared to surface measurements and
MOZAIC vertical profiles in the troposphere over Western/Central Europe for
summer 2003. The models reproduce the meteorological features and
enhancement of pollution during the period 2–14 August, but not fully the
ozone and CO mixing ratios measured during that episode. Modified normalised
mean biases are around &amp;minus;25% (except ~5% for MOCAGE) in the case
of ozone and from &amp;minus;80% to &amp;minus;30% for CO in the boundary layer above
Frankfurt. The coupling and assimilation of CO columns from MOPITT overcomes
some of the deficiencies in the treatment of transport, chemistry and
emissions in MOZART, reducing the negative biases to around 20%. The
high reactivity and small dry deposition velocities in MOCAGE seem to be
responsible for the overestimation of O&lt;sub&gt;3&lt;/sub&gt;  in this model.
Results from sensitivity simulations indicate that an increase of the
horizontal resolution to around 1&amp;deg;&amp;times;1&amp;deg; and potential
uncertainties in European anthropogenic emissions or in long-range transport
of pollution cannot completely account for the underestimation of CO and
O&lt;sub&gt;3&lt;/sub&gt; found for most models. A process-oriented TM5
sensitivity simulation where soil wetness was reduced results in a decrease
in dry deposition fluxes and a subsequent ozone increase larger than the
ozone changes due to the previous sensitivity runs. However this latest
simulation still underestimates ozone during the heat wave and overestimates
it outside that period. Most probably, a combination of the mentioned
factors together with underrepresented biogenic emissions in the models,
uncertainties in the modelling of vertical/horizontal transport processes in
the proximity of the boundary layer as well as limitations of the chemistry
schemes are responsible for the underestimation of ozone (overestimation in
the case of MOCAGE) and CO found in the models during this extreme pollution
event.</p>
</abstract>
<counts><page-count count="27"/></counts>
</article-meta>
</front>
<body/>
<back>
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