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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-2026-210</article-id>
<title-group>
<article-title>Precipitation reduction overrides edaphic controls on nitrous oxide emissions along a soil carbon, texture and pH gradient in a cereal field</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Kjær</surname>
<given-names>Sigrid Trier</given-names>
<ext-link>https://orcid.org/0000-0002-2810-9353</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>Dörsch</surname>
<given-names>Peter</given-names>
<ext-link>https://orcid.org/0000-0002-4916-1839</ext-link>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, NMBU, Ås, 1433, Norway</addr-line>
</aff>
<pub-date pub-type="epub">
<day>26</day>
<month>01</month>
<year>2026</year>
</pub-date>
<volume>2026</volume>
<fpage>1</fpage>
<lpage>25</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2026 Sigrid Trier Kjær</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-2026-210/">This article is available from https://egusphere.copernicus.org/preprints/2026/egusphere-2026-210/</self-uri>
<self-uri xlink:href="https://egusphere.copernicus.org/preprints/2026/egusphere-2026-210/egusphere-2026-210.pdf">The full text article is available as a PDF file from https://egusphere.copernicus.org/preprints/2026/egusphere-2026-210/egusphere-2026-210.pdf</self-uri>
<abstract>
<p>Nitrous oxide (N&lt;sub&gt;2&lt;/sub&gt;O) is a potent soil-borne greenhouse gas (GHG) which increases in the atmosphere due to the widespread use of synthetic nitrogen (N) fertilisers. Soil N&lt;sub&gt;2&lt;/sub&gt;O emissions are intrinsically controlled by soil moisture and edaphic properties such as soil organic carbon (SOC) content, texture and pH. With a future climate projected to increase&amp;nbsp;frequency&amp;nbsp;and severity of&amp;nbsp;droughts in northern Europe, understanding how these factors interact to affect N&lt;sub&gt;2&lt;/sub&gt;O emissions is critical for predicting climate feedbacks. In this study, we investigated N&lt;sub&gt;2&lt;/sub&gt;O emissions along a hillslope gradient in an agricultural field in southeast Norway, characterised by increasing SOC and clay content and decreasing pH from top to bottom. Eight rainout shelters were installed along the hillslope, nominally reducing precipitation by 49 %. N&lt;sub&gt;2&lt;/sub&gt;O emissions were measured weekly using static chambers over two years during the snow-free period. In the first year, N&lt;sub&gt;2&lt;/sub&gt;O emission measurements started two months after fertilisation and covered a four-month period, which included episodes of heavy rainfall; during this time, we found no effect of precipitation reduction or edaphic factors on emission rates. In the second year, reduced precipitation significantly decreased N&lt;sub&gt;2&lt;/sub&gt;O emissions (~25 %). Under ambient precipitation, cumulative N&lt;sub&gt;2&lt;/sub&gt;O emissions were positively correlated with SOC content and showed weak negative and positive trends with soil pH and clay content, respectively. No significant correlations were found in plots with reduced precipitation. Altogether, our findings illustrate that soil physicochemical controls on N&lt;sub&gt;2&lt;/sub&gt;O emissions depend on the interaction between soil properties and climate. This has consequences for parameterising process-based N&lt;sub&gt;2&lt;/sub&gt;O models driven by soil properties and weather and calls for more in-depth studies on interdependencies of edaphic and climatic drivers of N&lt;sub&gt;2&lt;/sub&gt;O emissions.</p>
</abstract>
<counts><page-count count="25"/></counts>
<funding-group>
<award-group id="gs1">
<funding-source>Norges Forskningsråd</funding-source>
<award-id>336692</award-id>
</award-group>
</funding-group>
</article-meta>
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