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<front>
<journal-meta>
<journal-id journal-id-type="publisher">EGUsphere</journal-id>
<journal-title-group>
<journal-title>EGUsphere</journal-title>
<abbrev-journal-title abbrev-type="publisher">EGUsphere</abbrev-journal-title>
<abbrev-journal-title abbrev-type="nlm-ta">EGUsphere</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub"></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/egusphere-2025-5978</article-id>
<title-group>
<article-title>A progressively elevated temperature (PET) IRSL SAR procedure &amp;ndash; first experiments and results</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Kadereit</surname>
<given-names>Annette</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>Sontag-González</surname>
<given-names>Mariana</given-names>
<ext-link>https://orcid.org/0000-0003-4678-1212</ext-link>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Kreutzer</surname>
<given-names>Sebastian</given-names>
<ext-link>https://orcid.org/0000-0002-0734-2199</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>Colombo</surname>
<given-names>Marco</given-names>
<ext-link>https://orcid.org/0000-0001-6672-0623</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>Schmidt</surname>
<given-names>Christoph</given-names>
<ext-link>https://orcid.org/0000-0002-2309-3209</ext-link>
</name>
<xref ref-type="aff" rid="aff4">
<sup>4</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Hanson</surname>
<given-names>Paul R.</given-names>
</name>
<xref ref-type="aff" rid="aff5">
<sup>5</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Institute of Geography, Heidelberg University, Im Neuenheimer Feld 348, 69120 Heidelberg, Germany</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Luminescence Dating Laboratory, Research Laboratory for Archaeology &amp; the History of Art, School of Archaeology, University of Oxford, OX1 3QY Oxford, UK</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>Institute of Geography, Justus Liebig University of Giessen, 35390 Giessen, Germany</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>Institute of Earth Surface Dynamics, University of Lausanne, Bâtiment Géopolis, 1015 Lausanne, Switzerland</addr-line>
</aff>
<aff id="aff5">
<label>5</label>
<addr-line>Conservation and Survey Division, School of Natural Resources, University of Nebraska-Lincoln, Lincoln, Nebraska, USA</addr-line>
</aff>
<pub-date pub-type="epub">
<day>16</day>
<month>12</month>
<year>2025</year>
</pub-date>
<volume>2025</volume>
<fpage>1</fpage>
<lpage>57</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2025 Annette Kadereit et al.</copyright-statement>
<copyright-year>2025</copyright-year>
<license license-type="open-access">
<license-p>This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit <ext-link ext-link-type="uri"  xlink:href="https://creativecommons.org/licenses/by/4.0/">https://creativecommons.org/licenses/by/4.0/</ext-link></license-p>
</license>
</permissions>
<self-uri xlink:href="https://egusphere.copernicus.org/preprints/2025/egusphere-2025-5978/">This article is available from https://egusphere.copernicus.org/preprints/2025/egusphere-2025-5978/</self-uri>
<self-uri xlink:href="https://egusphere.copernicus.org/preprints/2025/egusphere-2025-5978/egusphere-2025-5978.pdf">The full text article is available as a PDF file from https://egusphere.copernicus.org/preprints/2025/egusphere-2025-5978/egusphere-2025-5978.pdf</self-uri>
<abstract>
<p>Infrared stimulated luminescence (IRSL) dating is a common technique for dating feldspar-bearing sediment deposits. The technique is preferentially applied as a single aliquot regenerative (SAR) protocol derivative: Post-infrared infrared (pIR&lt;sub&gt;1st&lt;/sub&gt;IR&lt;sub&gt;2nd&lt;/sub&gt;) and multiple elevated temperature (MET) SAR protocols. Both of these techniques aim to reduce problems with unstable luminescence traps common to feldspars, known as anomalous fading. Elimination of the unstable IRSL signal component, which may lead to age underestimation, is achieved by sequential sampling of the IRSL signal at either two (pIR&lt;sub&gt;1st&lt;/sub&gt;IR&lt;sub&gt;2nd&lt;/sub&gt;) or a few (MET) discrete temperatures, usually in the range 50 &amp;deg;C to 290 &amp;deg;C. We propose a modified approach, the progressively elevated temperature (PET) IRSL SAR, which continuously records the luminescence signal while progressively elevating the sample temperature. The benefits of this approach include the generation of quasi-continuous data chains, beginning with the recorded PET-IRSL signal curves, over De-value curves relevant for palaeodose assessment, a-value curves used for dose-rate refinement, and g-value curves serving to assess the signal loss resulting from fading. In addition to anomalous fading problems, feldspars do not bleach as quickly and thoroughly as quartz, potentially resulting in age overestimation. The illustrative PET data curves may be useful in illustrating a sample&amp;acute;s bleaching and fading history. Thus, they may allow users to both reduce problems with anomalous fading and identify aliquots that are least impacted by incomplete bleaching.</p>
</abstract>
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<funding-group>
<award-group id="gs1">
<funding-source>Deutsche Forschungsgemeinschaft</funding-source>
<award-id>528704761</award-id>
<award-id>505822867</award-id>
</award-group>
</funding-group>
</article-meta>
</front>
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