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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-2026-3563</article-id>
<title-group>
<article-title>Persistent and non-negligible aerodynamic entrainment during dust emission: new evidence from field observations and wind tunnel experiments</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Yang</surname>
<given-names>Shengfei</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>Du</surname>
<given-names>Heqiang</given-names>
<ext-link>https://orcid.org/0000-0002-3300-2921</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>Fan</surname>
<given-names>Yawei</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>Li</surname>
<given-names>Zongxing</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>Liu</surname>
<given-names>Yongjie</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>State Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>University of Chinese Academy of Sciences, Beijing, 100049, China</addr-line>
</aff>
<pub-date pub-type="epub">
<day>08</day>
<month>07</month>
<year>2026</year>
</pub-date>
<volume>2026</volume>
<fpage>1</fpage>
<lpage>28</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2026 Shengfei Yang et al.</copyright-statement>
<copyright-year>2026</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/2026/egusphere-2026-3563/">This article is available from https://egusphere.copernicus.org/preprints/2026/egusphere-2026-3563/</self-uri>
<self-uri xlink:href="https://egusphere.copernicus.org/preprints/2026/egusphere-2026-3563/egusphere-2026-3563.pdf">The full text article is available as a PDF file from https://egusphere.copernicus.org/preprints/2026/egusphere-2026-3563/egusphere-2026-3563.pdf</self-uri>
<abstract>
<p>Dust emission is a key process in wind erosion that influences climate and air quality. Consequently, the physical mechanisms of dust emission have attracted widespread attention. However, whether aerodynamic entrainment can persist during natural dust emission events remains debated, and this mechanism is often neglected or treated as secondary in dust emission parameterizations. To address this dispute, we combine field observations and wind tunnel experiments to investigate the persistence and contribution of aerodynamic entrainment. Field observations show that, in the observed plots where saltation rarely occurred, aerodynamic dust entrainment persisted throughout the emission process, whereas in most of the observed plots, the threshold friction velocity for dust entrainment (TFVa) was generally lower than that for saltation initiation. Even where the TFVa exceeded that for saltation, dust emission persisted beyond the cessation of saltation and its emission rate was enhanced by saltation disturbance. Wind tunnel experiments further demonstrated that aerodynamic entrainment persisted and contributed substantially to total dust emissions, accounting for 16&amp;ndash;62 %. Moreover, the enhancement of dust emission by saltation resulted primarily from surface renewal and aggregate breakdown, which continuously replenished erodible fine particles. Furthermore, existing dust emission models based solely on aerodynamic entrainment or saltation bombardment fail to reproduce observed dust emission magnitude and temporal dynamics. Together, these findings indicate that aerodynamic entrainment is persistent and non-negligible, while saltation contributes not only through dust production but also by modifying surface erodibility. We therefore propose an &amp;ldquo;entrainment&amp;ndash;saltation&amp;ndash;renewal&amp;ndash;entrainment&amp;rdquo; framework and suggest future models should consider coupled multi-mechanism processes.</p>
</abstract>
<counts><page-count count="28"/></counts>
<funding-group>
<award-group id="gs1">
<funding-source>National Natural Science Foundation of China</funding-source>
<award-id>No.42271016</award-id>
</award-group>
</funding-group>
</article-meta>
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