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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-7-6075-2007</article-id>
<title-group>
<article-title>Balloon-borne radiometer measurements of Northern Hemisphere mid-latitude stratospheric HNO&lt;sub&gt;3&lt;/sub&gt; profiles spanning 12 years</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Toohey</surname>
<given-names>M.</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>Quine</surname>
<given-names>B. M.</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>Strong</surname>
<given-names>K.</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>Bernath</surname>
<given-names>P. F.</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>Boone</surname>
<given-names>C. D.</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>Jonsson</surname>
<given-names>A. I.</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>McElroy</surname>
<given-names>C. T.</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>Walker</surname>
<given-names>K. A.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</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>Wunch</surname>
<given-names>D.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff5">
<sup>5</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Department of Physics, University of Toronto, Toronto, ON,  M5S 1A7, Canada</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>School of Engineering, York University, Toronto, ON, M3J  1P3, Canada</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>Department of Chemistry, University of York, Heslington,  York, YO10 5DD, UK</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>Department of Chemistry, Waterloo University, Waterloo,  ON, N2L 3G1, Canada</addr-line>
</aff>
<aff id="aff5">
<label>5</label>
<addr-line>California Institute of Technology, Pasadena, CA, 91125,  USA</addr-line>
</aff>
<aff id="aff6">
<label>6</label>
<addr-line>Environment Canada, Downsview, ON, M3H 5T4, Canada</addr-line>
</aff>
<pub-date pub-type="epub">
<day>11</day>
<month>12</month>
<year>2007</year>
</pub-date>
<volume>7</volume>
<issue>23</issue>
<fpage>6075</fpage>
<lpage>6084</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>
<self-uri xlink:href="http://www.atmos-chem-phys.net/7/6075/2007/acp-7-6075-2007.html">This article is available from http://www.atmos-chem-phys.net/7/6075/2007/acp-7-6075-2007.html</self-uri>
<self-uri xlink:href="http://www.atmos-chem-phys.net/7/6075/2007/acp-7-6075-2007.pdf">The full text article is available as a PDF file from http://www.atmos-chem-phys.net/7/6075/2007/acp-7-6075-2007.pdf</self-uri>
<abstract>
<p>Low-resolution atmospheric thermal emission spectra collected by
balloon-borne radiometers over the time span of 1990&amp;ndash;2002 are used
to retrieve vertical profiles of HNO&lt;sub&gt;3&lt;/sub&gt;, CFC-11 and CFC-12
volume mixing ratios between approximately 10 and 35 km altitude.
All of the data analyzed have been collected from launches from a
Northern Hemisphere mid-latitude site, during late summer, when
stratospheric dynamic variability is at a minimum. The retrieval
technique incorporates detailed forward modeling of the instrument
and the radiative properties of the atmosphere, and obtains a best
fit between modeled and measured spectra through a combination of
onion-peeling and optimization steps. The retrieved HNO&lt;sub&gt;3&lt;/sub&gt;
profiles are consistent over the 12-year period, and are consistent
with recent measurements by the Atmospheric Chemistry
Experiment-Fourier transform spectrometer satellite instrument. We
therefore find no evidence of long-term changes in the HNO&lt;sub&gt;3&lt;/sub&gt;
summer mid-latitude profile, although the uncertainty of our
measurements precludes a conclusive trend analysis.</p>
</abstract>
<counts><page-count count="10"/></counts>
</article-meta>
</front>
<body/>
<back>
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