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<front>
<journal-meta>
<journal-id journal-id-type="publisher">ACPD</journal-id>
<journal-title-group>
<journal-title>Atmospheric Chemistry and Physics Discussions</journal-title>
<abbrev-journal-title abbrev-type="publisher">ACPD</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1680-7375</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/acpd-8-6603-2008</article-id>
<title-group>
<article-title>Evaluation of a new lightning-produced NO&lt;sub&gt;x&lt;/sub&gt; parameterization for cloud resolving models and its associated uncertainties</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Barthe</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>Barth</surname>
<given-names>M. C.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>National Center for Atmospheric Research, Boulder, CO, USA</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>now at: Laboratoire d&apos;Aérologie, CNRS/Université Paul Sabatier, Toulouse, France</addr-line>
</aff>
<pub-date pub-type="epub">
<day>04</day>
<month>04</month>
<year>2008</year>
</pub-date>
<volume>8</volume>
<issue>2</issue>
<fpage>6603</fpage>
<lpage>6651</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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<abstract>
<p>A new parameterization of the lightning-produced NO&lt;sub&gt;x&lt;/sub&gt; has been developed for cloud-resolving models.
This parameterization is based on three unique characteristics.
First, the cells that can produce lightning are identified using a vertical velocity threshold.
Second, the flash rate in each cell is estimated from the non-precipitation and precipitation ice mass flux product.
Third, the source location is filamentary instead of volumetric as in previous parameterizations.

&lt;br&gt;&lt;br&gt;

This parameterization has been tested on the 10 July 1996 Stratospheric-Tropospheric Experiment: Radiation, Aerosols and Ozone (STERAO) storm.
Comparisons of the simulated flash rate and NO mixing ratio with observations at different locations and stages of the storm show a good agreement.
An individual flash produces on average 121&amp;plusmn;41 moles of NO (7.3&amp;plusmn;2.5&amp;times;10&lt;sup&gt;25&lt;/sup&gt; molecules
NO) for the simulated high cloud base, high shear storm.
Sensitivity tests have been performed to study the impact of the flash rate, the
cloud-to-ground flash ratio, the flash length, the spatial distribution of the NO
molecules, and the production rate per flash on the NO concentration and distribution.
Results show a strong impact from the flash rate, the spatial placement of the
lightning-NO&lt;sub&gt;x&lt;/sub&gt; source and the number of moles produced per flash.</p>
</abstract>
<counts><page-count count="49"/></counts>
</article-meta>
</front>
<body/>
<back>
<ref-list>
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