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<front>
<journal-meta>
<journal-id journal-id-type="publisher">TC</journal-id>
<journal-title-group>
<journal-title>The Cryosphere</journal-title>
<abbrev-journal-title abbrev-type="publisher">TC</abbrev-journal-title>
<abbrev-journal-title abbrev-type="nlm-ta">The Cryosphere</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1994-0424</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/tc-7-1839-2013</article-id>
<title-group>
<article-title>Supercooled interfacial water in fine-grained soils probed by  dielectric spectroscopy</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Lorek</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>Wagner</surname>
<given-names>N.</given-names>
<ext-link>https://orcid.org/0000-0001-5416-7162</ext-link>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>German Aerospace Center (DLR),  Berlin, Germany</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Institute of Material Research and Testing at the  Bauhaus-University Weimar, Weimar, Germany</addr-line>
</aff>
<pub-date pub-type="epub">
<day>06</day>
<month>12</month>
<year>2013</year>
</pub-date>
<volume>7</volume>
<issue>6</issue>
<fpage>1839</fpage>
<lpage>1855</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2013 A. Lorek</copyright-statement>
<copyright-year>2013</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://tc.copernicus.org/articles/7/1839/2013/tc-7-1839-2013.html">This article is available from https://tc.copernicus.org/articles/7/1839/2013/tc-7-1839-2013.html</self-uri>
<self-uri xlink:href="https://tc.copernicus.org/articles/7/1839/2013/tc-7-1839-2013.pdf">The full text article is available as a PDF file from https://tc.copernicus.org/articles/7/1839/2013/tc-7-1839-2013.pdf</self-uri>
<abstract>
<p>Water substantially affects nearly all physical,
  chemical and biological processes on the Earth. Recent Mars
  observations as well as laboratory investigations suggest that water
  is a key factor of current physical and chemical processes on
  the Martian surface, e.g. rheological phenomena. Therefore it is of
  particular interest to get information about the liquid-like state
  of water on Martian analogue soils for temperatures below
  0 °C. To this end, a parallel plate capacitor has been developed
  to obtain isothermal dielectric spectra of fine-grained soils in the
  frequency range from 10 Hz to 1.1 MHz at Martian-like temperatures down to −70 °C. Two Martian analogue
  soils have been investigated: a Ca-bentonite (specific surface of
  237 m&lt;sup&gt;2&lt;/sup&gt; g&lt;sup&gt;−1&lt;/sup&gt;, up to 9.4% &lt;i&gt;w&lt;/i&gt; / w&lt;/i&gt; gravimetric water
  content) and JSC Mars 1, a volcanic ash (specific surface of
  146 m&lt;sup&gt;2&lt;/sup&gt; g&lt;sup&gt;−1&lt;/sup&gt;, up to 7.4% &lt;i&gt;w&lt;/i&gt; / &lt;i&gt;w&lt;/i&gt;). Three soil-specific
  relaxation processes are observed in the investigated
  frequency–temperature range: two weak high-frequency processes
  (bound or hydrated water as well as ice) and a strong low-frequency
  process due to counter-ion relaxation and the Maxwell–Wagner
  effect. To characterize the dielectric relaxation behaviour,
  a generalized fractional dielectric relaxation model was applied
  assuming three active relaxation processes with relaxation time of
  the &lt;i&gt;i&lt;/i&gt;th process modelled with an Eyring equation. The real part of
  effective complex soil permittivity at 350 kHz was used to
  determine ice and liquid-like water content by means of the Birchak
  or CRIM equation. There are evidence that bentonite down to
  −70 °C has a liquid-like water content of 1.17 monolayers
  and JSC Mars 1 a liquid-like water content of 1.96 monolayers.</p>
</abstract>
<counts><page-count count="17"/></counts>
</article-meta>
</front>
<body/>
<back>
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