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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-2026-3536</article-id>
<title-group>
<article-title>Smoke transport and potential impacts from all observed pyroCb events in North America during 2013&amp;ndash;2023</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Das</surname>
<given-names>Rubel Chandra</given-names>
<ext-link>https://orcid.org/0009-0009-8187-2209</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>Vernier</surname>
<given-names>Jean-Paul</given-names>
</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="aff5">
<sup>5</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Pandit</surname>
<given-names>Amit Kumar</given-names>
<ext-link>https://orcid.org/0000-0002-1957-5934</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>Peterson</surname>
<given-names>David 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>Fromm</surname>
<given-names>Michael 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>Kablick</surname>
<given-names>George</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>Dumelie</surname>
<given-names>Nicolas</given-names>
</name>
<xref ref-type="aff" rid="aff5">
<sup>5</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Joly</surname>
<given-names>Lilian</given-names>
</name>
<xref ref-type="aff" rid="aff5">
<sup>5</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Flaten</surname>
<given-names>James</given-names>
</name>
<xref ref-type="aff" rid="aff6">
<sup>6</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>National Institute of Aerospace, Hampton, VA, USA</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>NASA Langley Research Center, Hampton, VA, USA</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>Naval Research Laboratory, Monterey, California, USA</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>Naval Research Laboratory, Washington, DC, USA</addr-line>
</aff>
<aff id="aff5">
<label>5</label>
<addr-line>Université de Reims Champagne-Ardenne, GSMA UMR CNRS 7331, France</addr-line>
</aff>
<aff id="aff6">
<label>6</label>
<addr-line>Aerospace Engineering and Mechanics Department, University of Minnesota, Minneapolis, MN, USA</addr-line>
</aff>
<pub-date pub-type="epub">
<day>06</day>
<month>07</month>
<year>2026</year>
</pub-date>
<volume>2026</volume>
<fpage>1</fpage>
<lpage>37</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2026 Rubel Chandra Das 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-2026-3536/">This article is available from https://egusphere.copernicus.org/preprints/2026/egusphere-2026-3536/</self-uri>
<self-uri xlink:href="https://egusphere.copernicus.org/preprints/2026/egusphere-2026-3536/egusphere-2026-3536.pdf">The full text article is available as a PDF file from https://egusphere.copernicus.org/preprints/2026/egusphere-2026-3536/egusphere-2026-3536.pdf</self-uri>
<abstract>
<p>Pyrocumulonimbus (pyroCb) events provide an efficient pathway for wildfire smoke and combustion products to enter the Upper Troposphere and Lower Stratosphere (UTLS), where they are transported far from their source regions and perturb atmospheric composition, radiation, and dynamics. Although there are individual case studies, their cumulative transport behaviour over decadal time scales remains insufficiently characterized. Here, we investigate the short-, mid-, and long-range transport pathways, seasonal and regional variability, vertical structure, and residence characteristics of smoke from all observed North American pyroCbs during 2013&amp;ndash;2023 using the Langley Trajectory Model, evaluated against satellite observations. Results show that smoke transport is influenced by source region, season, injection layer, and the evolving synoptic-scale circulation. Summer accounts for the majority of events, while Canadian pyroCbs occur more frequently than pyroCbs in the United States and dominate much of the UTLS and long-range trans-Atlantic transport. Canadian smoke is often transported along midlatitude pathways toward Europe, whereas U.S. pyroCbs more strongly contribute to lower-latitude short- and mid-range transport and to tropical transport pathways. Short- and mid-range tropospheric transport reveals persistent free- and upper-tropospheric downstream convergence regions, indicating areas where smoke may repeatedly influence clouds, radiation, weather-relevant conditions. In contrast, UTLS and stratospheric transport pathways exhibit faster and longer-range transport, including recurrent midlatitude, tropical, cross-hemispheric pathways. This study provides a decadal transport framework for interpreting how smoke injected by North American pyroCbs is subsequently redistributed. The results help connect pyroCb smoke with observed smoke signatures and atmospheric impacts, while supporting future model evaluation and mission planning.</p>
</abstract>
<counts><page-count count="37"/></counts>
<funding-group>
<award-group id="gs1">
<funding-source>National Aeronautics and Space Administration</funding-source>
<award-id>80LARC23DA003</award-id>
</award-group>
</funding-group>
</article-meta>
</front>
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