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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>
<abbrev-journal-title abbrev-type="nlm-ta">Atmos. Chem. Phys.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1680-7324</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/acp-15-2019-2015</article-id>
<title-group>
<article-title>Contribution of liquid, NAT and ice particles to chlorine activation and ozone depletion in Antarctic winter and spring</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Kirner</surname>
<given-names>O.</given-names>
<ext-link>https://orcid.org/0000-0001-5668-6177</ext-link>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Müller</surname>
<given-names>R.</given-names>
<ext-link>https://orcid.org/0000-0002-5024-9977</ext-link>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Ruhnke</surname>
<given-names>R.</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>Fischer</surname>
<given-names>H.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Karlsruhe Institute of Technology, Steinbuch Centre for Computing (SCC), Karlsruhe, Germany</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Research Centre Jülich GmbH, Institute of Energy and Climate Research – Stratosphere (IEK-7), Jülich, Germany</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>Karlsruhe Institute of Technology, Institute for Meteorology and Climate Research (IMK), Karlsruhe, Germany</addr-line>
</aff>
<pub-date pub-type="epub">
<day>24</day>
<month>02</month>
<year>2015</year>
</pub-date>
<volume>15</volume>
<issue>4</issue>
<fpage>2019</fpage>
<lpage>2030</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2015 O. Kirner et al.</copyright-statement>
<copyright-year>2015</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://acp.copernicus.org/articles/15/2019/2015/acp-15-2019-2015.html">This article is available from https://acp.copernicus.org/articles/15/2019/2015/acp-15-2019-2015.html</self-uri>
<self-uri xlink:href="https://acp.copernicus.org/articles/15/2019/2015/acp-15-2019-2015.pdf">The full text article is available as a PDF file from https://acp.copernicus.org/articles/15/2019/2015/acp-15-2019-2015.pdf</self-uri>
<abstract>
<p>Heterogeneous reactions in the Antarctic stratosphere are the cause
  of chlorine activation and ozone depletion, but the relative roles
  of different types of polar stratospheric clouds (PSCs) in chlorine activation is an open
  question. We use multi-year simulations of the chemistry-climate
  model ECHAM5/MESSy for Atmospheric Chemistry (EMAC) to investigate the impact that the various types of PSCs
  have on Antarctic chlorine activation and ozone loss.
&lt;br&gt;&lt;br&gt;
One standard and three sensitivity EMAC simulations have been performed. In
all simulations a Newtonian relaxation technique using the ERA-Interim
reanalysis was applied to simulate realistic synoptic conditions. In the
three sensitivity simulations, we only changed the heterogeneous chemistry on
  PSC particles by switching the chemistry on liquid, nitric acid trihydrate (NAT) and
  ice particles on and off. The results of these simulations show that the
  significance of heterogeneous reactions on NAT and ice particles for chlorine activation
  and ozone depletion in Antarctic winter and spring is small in comparison
  to the significance of heterogeneous reactions on liquid particles. Liquid particles alone are sufficient to activate
  almost all of the available chlorine, with the exception of the upper PSC regions
  between 10 and 30 hPa, where temporarily ice particles show a relevant contribution.
  Shortly after the first PSC occurrence, NAT particles contribute a small
  fraction to chlorine activation.
&lt;br&gt;&lt;br&gt;
Heterogeneous chemistry on liquid particles is responsible for more than
90% of the ozone depletion in Antarctic spring in the model simulations.
In high southern latitudes, heterogeneous chemistry on ice particles causes
only up to 5 DU of additional ozone depletion in the column and
heterogeneous chemistry on NAT particles less than 0.5 DU.
&lt;br&gt;&lt;br&gt;
The simulated HNO&lt;sub&gt;3&lt;/sub&gt;, ClO and O&lt;sub&gt;3&lt;/sub&gt; results agree closely
with observations from the Microwave Limb Sounder (MLS) onboard NASA&apos;s Aura
satellite.</p>
</abstract>
<counts><page-count count="12"/></counts>
</article-meta>
</front>
<body/>
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