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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-2026-4380</article-id>
<title-group>
<article-title>Effects of enhanced rock weathering on soil gas fluxes across UK land uses</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Rees</surname>
<given-names>Kate</given-names>
<ext-link>https://orcid.org/0009-0007-3881-0972</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>Val Martin</surname>
<given-names>Maria</given-names>
<ext-link>https://orcid.org/0000-0001-9715-0504</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>Beerling</surname>
<given-names>David</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>Bezanger</surname>
<given-names>Aurelia</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>Cowan</surname>
<given-names>Nicolas</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>Devlin</surname>
<given-names>Ruby</given-names>
</name>
<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>Hanlon</surname>
<given-names>Mark</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>Langford</surname>
<given-names>Ben</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>Medinets</surname>
<given-names>Sergiy</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</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>Drewer</surname>
<given-names>Julia</given-names>
<ext-link>https://orcid.org/0000-0002-6263-6341</ext-link>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Leverhulme Centre for Climate Change Mitigation, School of Biosciences, University of Sheffield, Sheffield, United  Kingdom</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>UK Centre for Ecology and Hydrology, Edinburgh, United Kingdom</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>School of Geosciences, University of Edinburgh, Edinburgh, United Kingdom</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>Regional Centre for Integrated Environmental Monitoring, Odesa National I.I. Mechnikov University, Odesa, Ukraine</addr-line>
</aff>
<pub-date pub-type="epub">
<day>28</day>
<month>07</month>
<year>2026</year>
</pub-date>
<volume>2026</volume>
<fpage>1</fpage>
<lpage>33</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2026 Kate Rees 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-2026-4380/">This article is available from https://egusphere.copernicus.org/preprints/2026/egusphere-2026-4380/</self-uri>
<self-uri xlink:href="https://egusphere.copernicus.org/preprints/2026/egusphere-2026-4380/egusphere-2026-4380.pdf">The full text article is available as a PDF file from https://egusphere.copernicus.org/preprints/2026/egusphere-2026-4380/egusphere-2026-4380.pdf</self-uri>
<abstract>
<p>Enhanced rock weathering (ERW) is a proposed carbon dioxide (CO&lt;sub&gt;2&lt;/sub&gt;) removal strategy via the application of crushed silicate rocks to accelerate the natural breakdown of silicate minerals, permanently trapping atmospheric CO&lt;sub&gt;2&lt;/sub&gt;. Application of rock dust may alter soil properties, such as pH, with potential consequences for soil trace gases fluxes relevant to climate forcing and air quality. However, previous ERW studies have focused mainly on the principal greenhouse gases, while broader trace gas responses remain poorly constrained. This laboratory study presents measurements of nitric oxide (NO), ammonia (NH&lt;sub&gt;3&lt;/sub&gt;), carbon monoxide (CO), hydrogen (H&lt;sub&gt;2&lt;/sub&gt;) and volatile organic compounds (VOCs), as well as CO&lt;sub&gt;2&lt;/sub&gt;, methane (CH&lt;sub&gt;4&lt;/sub&gt;) and nitrous oxide (N&lt;sub&gt;2&lt;/sub&gt;O), from control and ERW-treated soils collected from arable, grassland and newly planted broadleaf and conifer forest field trials in the UK. Soils were sieved, repacked and rewetted for laboratory measurements. A dynamic air-flow-through chamber system, equipped with a high-resolution multi-gas analyser and a proton-transfer-reaction mass spectrometer, was used to measure N&lt;sub&gt;2&lt;/sub&gt;O, NO, NH&lt;sub&gt;3&lt;/sub&gt;, CO, and VOCs between 5 and 25 &amp;deg;C. CO&lt;sub&gt;2&lt;/sub&gt; and CH&lt;sub&gt;4&lt;/sub&gt; fluxes were measured online at 20 &amp;deg;C using a closed-loop chamber method, and H&lt;sub&gt;2&lt;/sub&gt; fluxes were measured by discrete sampling from static chamber headspace using gas chromatography. ERW-associated differences varied among gases and soils, with no consistent response across all incubated samples. The reported treatment differences included lower CO&lt;sub&gt;2&lt;/sub&gt; emissions in both forest soils, greater CH&lt;sub&gt;4&lt;/sub&gt; uptake in broadleaf forest soil, higher NO emissions in grassland soil, and changes in CO and hydrocarbon fluxes in forest soils. NH&lt;sub&gt;3&lt;/sub&gt; and H&lt;sub&gt;2&lt;/sub&gt; fluxes showed no statistically significant treatment responses, and no individual VOC remained significantly different after correction for multiple testing. Overall, rock dust application had limited and inconsistent impacts on trace gas fluxes across the soils examined in this snapshot study. Longer-term measurements at ERW field trials are needed to examine how these responses vary seasonally and evolve as the applied materials continued to weather. These measurements should be accompanied by in-depth soil characterisation and microbial analyses to elucidate the complex relationships between ERW treatment and trace gas fluxes. This evidence is needed to assess the full climate, air-quality and environmental implications of large-scale ERW deployment.</p>
</abstract>
<counts><page-count count="33"/></counts>
<funding-group>
<award-group id="gs1">
<funding-source>UK Research and Innovation</funding-source>
<award-id>MR/T019867/1</award-id>
<award-id>UKRI2059</award-id>
</award-group>
<award-group id="gs2">
<funding-source>UK Research and Innovation</funding-source>
<award-id>NE/X013456/1</award-id>
</award-group>
</funding-group>
</article-meta>
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