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<front>
<journal-meta>
<journal-id journal-id-type="publisher">AMT</journal-id>
<journal-title-group>
<journal-title>Atmospheric Measurement Techniques</journal-title>
<abbrev-journal-title abbrev-type="publisher">AMT</abbrev-journal-title>
<abbrev-journal-title abbrev-type="nlm-ta">Atmos. Meas. Tech.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1867-8548</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/amt-2-337-2009</article-id>
<title-group>
<article-title>MIPAS reduced spectral resolution UTLS-1 mode measurements of temperature,  O&lt;sub&gt;3&lt;/sub&gt;, HNO&lt;sub&gt;3&lt;/sub&gt;, N&lt;sub&gt;2&lt;/sub&gt;O, H&lt;sub&gt;2&lt;/sub&gt;O and relative humidity over ice: retrievals and comparison to MLS</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Chauhan</surname>
<given-names>S.</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>Höpfner</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>Stiller</surname>
<given-names>G. 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>von Clarmann</surname>
<given-names>T.</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>Funke</surname>
<given-names>B.</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>Glatthor</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>Grabowski</surname>
<given-names>U.</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>Linden</surname>
<given-names>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>Kellmann</surname>
<given-names>S.</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>Milz</surname>
<given-names>M.</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>Steck</surname>
<given-names>T.</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 contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Fischer</surname>
<given-names>H.</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>Froidevaux</surname>
<given-names>L.</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>Lambert</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>Santee</surname>
<given-names>M. L.</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>Schwartz</surname>
<given-names>M.</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>Read</surname>
<given-names>W. G.</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>Livesey</surname>
<given-names>N. J.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Institut für Meteorologie und Klimaforschung, Forschungszentrum Karlsruhe, Karlsruhe, Germany</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Instituto de Astrofísica de Andalucía CSIC, Granada, Spain</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>now at: Luleå Tekniska Universitet Institutionen för Rymdvetenskap, Kiruna, Sweden</addr-line>
</aff>
<aff id="aff5">
<label>5</label>
<addr-line>now at: Gymnasium, Neckartenzlingen, Germany</addr-line>
</aff>
<pub-date pub-type="epub">
<day>21</day>
<month>07</month>
<year>2009</year>
</pub-date>
<volume>2</volume>
<issue>2</issue>
<fpage>337</fpage>
<lpage>353</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2009 S. Chauhan et al.</copyright-statement>
<copyright-year>2009</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://amt.copernicus.org/articles/2/337/2009/amt-2-337-2009.html">This article is available from https://amt.copernicus.org/articles/2/337/2009/amt-2-337-2009.html</self-uri>
<self-uri xlink:href="https://amt.copernicus.org/articles/2/337/2009/amt-2-337-2009.pdf">The full text article is available as a PDF file from https://amt.copernicus.org/articles/2/337/2009/amt-2-337-2009.pdf</self-uri>
<abstract>
<p>During several periods since 2005 the Michelson Interferometer for Passive Atmospheric Sounding
(MIPAS) on Envisat has performed observations dedicated to the region of the upper
troposphere/lower stratosphere (UTLS). For the duration of November/December 2005 global
distributions of temperature and several trace gases from MIPAS UTLS-1 mode
measurements have been retrieved using the IMK/IAA (Institut für Meteorologie
und Klimaforschung/Instituto de Astrofísica de Andalucía)
scientific processor. In the UTLS region a vertical resolution of 3 km for temperaure,
3 to 4 km for H&lt;sub&gt;2&lt;/sub&gt;O,
2.5 to 3 km for O&lt;sub&gt;3&lt;/sub&gt;, 3.5 km for HNO&lt;sub&gt;3&lt;/sub&gt; and 3.5 to 2.5 km for N&lt;sub&gt;2&lt;/sub&gt;O has been achieved.
The retrieved temperature, H&lt;sub&gt;2&lt;/sub&gt;O, O&lt;sub&gt;3&lt;/sub&gt;, HNO&lt;sub&gt;3&lt;/sub&gt;, N&lt;sub&gt;2&lt;/sub&gt;O,
and relative humidity over ice are intercompared with the Microwave Limb Sounder
(MLS/Aura) v2.2 data in the pressure range 316 to 0.68 hPa, 316 to 0.68 hPa,
215 to 0.68 hPa, 215 to 3.16 hPa, 100 to 1 hPa and 316 to 10 hPa, respectively.
In general, MIPAS and MLS temperatures are biased within &amp;plusmn;4 K over the whole
pressure and latitude range. Systematic, latitude-independent differences of
&amp;minus;2 to &amp;minus;4 K (MIPAS-MLS) at 121 hPa are explained by previously observed
biases in the MLS v2.2 temperature retrievals. Temperature differences of &amp;minus;4 K
up to 12 K above 10.0 hPa are present both in MIPAS and MLS with respect to ECMWF
(European Centre for Medium-Range Weather Forecasts) and are likely due to deficiencies
of the ECMWF analysis data. MIPAS and MLS stratospheric volume mixing ratios (vmr)
of H&lt;sub&gt;2&lt;/sub&gt;O are biased within &amp;plusmn;1 ppmv,
with indication of oscillations between 146 and 26 hPa in the MLS dataset.
Tropical upper tropospheric values of relative humidity over ice measured by
the two instruments differ by &amp;plusmn;20% in the pressure range ~146 to 68 hPa.
These differences are mainly caused by the MLS temperature biases. Ozone mixing
ratios agree within 0.5 ppmv (10 to 20%) between 68 and 14 hPa. At pressures
smaller than 10 hPa, MIPAS O&lt;sub&gt;3&lt;/sub&gt; vmr are higher than MLS by an average of 0.5 ppmv (10%).
General agreement between MIPAS and MLS HNO&lt;sub&gt;3&lt;/sub&gt; is within the range of &amp;minus;1.0
(&amp;minus;10%) to 1.0 ppbv (20%). MIPAS HNO&lt;sub&gt;3&lt;/sub&gt; is 1.0 ppbv (10%) higher compared
to MLS  between 46 hPa and 10 hPa over the Northern Hemisphere. Over the tropics
at 31.6 hPa MLS shows a low bias of more than 1 ppbv (&amp;gt;50%).
In general, MIPAS and MLS N&lt;sub&gt;2&lt;/sub&gt;O vmr agree within 20 to 40 ppbv (20 to 40%).
Differences in the range between 100 to 21 hPa are attributed to a known 20%
positive bias in MIPAS N&lt;sub&gt;2&lt;/sub&gt;O data.</p>
</abstract>
<counts><page-count count="17"/></counts>
</article-meta>
</front>
<body/>
<back>
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