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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-10-10223-2010</article-id>
<title-group>
<article-title>Ozone variability and halogen oxidation within the Arctic and sub-Arctic springtime boundary layer</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Gilman</surname>
<given-names>J. B.</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>Burkhart</surname>
<given-names>J. F.</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>Lerner</surname>
<given-names>B. M.</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>Williams</surname>
<given-names>E. J.</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>Kuster</surname>
<given-names>W. C.</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>Goldan</surname>
<given-names>P. D.</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>Murphy</surname>
<given-names>P. 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>Warneke</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>Fowler</surname>
<given-names>C.</given-names>
</name>
<xref ref-type="aff" rid="aff4">
<sup>4</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Montzka</surname>
<given-names>S. A.</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>Miller</surname>
<given-names>B. R.</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>Miller</surname>
<given-names>L.</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>Oltmans</surname>
<given-names>S. J.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
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<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Ryerson</surname>
<given-names>T. B.</given-names>
</name>
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<sup>1</sup>
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</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Cooper</surname>
<given-names>O. R.</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>Stohl</surname>
<given-names>A.</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>de Gouw</surname>
<given-names>J. A.</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-group><aff id="aff1">
<label>1</label>
<addr-line>Earth System Research Laboratory (ESRL), NOAA, Boulder, CO, USA</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Cooperative Institute for Research in the Environmental Sciences (CIRES), University of Colorado, Boulder, CO, USA</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>Norwegian Institute for Air Research (NILU), Kjeller, Norway</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>Colorado Center for Astrodynamics Research (CCAR), University of Colorado, Boulder, CO, USA</addr-line>
</aff>
<pub-date pub-type="epub">
<day>02</day>
<month>11</month>
<year>2010</year>
</pub-date>
<volume>10</volume>
<issue>21</issue>
<fpage>10223</fpage>
<lpage>10236</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/10/10223/2010/acp-10-10223-2010.pdf">The full text article is available as a PDF file from http://www.atmos-chem-phys.net/10/10223/2010/acp-10-10223-2010.pdf</self-uri>
<abstract>
<p>The influence of halogen oxidation on the variabilities of ozone (O&lt;sub&gt;3&lt;/sub&gt;)
and volatile organic compounds (VOCs) within the Arctic and sub-Arctic
atmospheric boundary layer was investigated using field measurements from
multiple campaigns conducted in March and April 2008 as part of the POLARCAT
project. For the ship-based measurements, a high degree of correlation (&lt;i&gt;r&lt;/i&gt; = 0.98
for 544 data points collected north of 68° N) was observed between
the acetylene to benzene ratio, used as a marker for chlorine and bromine
oxidation, and O&lt;sub&gt;3&lt;/sub&gt; signifying the vast influence of halogen oxidation
throughout the ice-free regions of the North Atlantic. Concurrent airborne
and ground-based measurements in the Alaskan Arctic substantiated this
correlation and were used to demonstrate that halogen oxidation influenced
O&lt;sub&gt;3&lt;/sub&gt; variability throughout the Arctic boundary layer during these
springtime studies. Measurements aboard the R/V &lt;i&gt;Knorr&lt;/i&gt; in the North Atlantic and
Arctic Oceans provided a unique view of the transport of O&lt;sub&gt;3&lt;/sub&gt;-poor air
masses from the Arctic Basin to latitudes as far south as 52° N.
FLEXPART, a Lagrangian transport model, was used to quantitatively determine
the exposure of air masses encountered by the ship to first-year ice (FYI),
multi-year ice (MYI), and total ICE (FYI+MYI). O&lt;sub&gt;3&lt;/sub&gt; anti-correlated with
the modeled total ICE tracer (&lt;i&gt;r&lt;/i&gt; = &amp;minus;0.86) indicating that up to 73% of the
O&lt;sub&gt;3&lt;/sub&gt; variability measured in the Arctic marine boundary layer could be
related to sea ice exposure.</p>
</abstract>
<counts><page-count count="14"/></counts>
</article-meta>
</front>
<body/>
<back>
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