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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">1680-7375</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-2024-3893</article-id>
<title-group>
<article-title>On the Processes Determining the Slope of Cloud-Water Adjustments in Non-Precipitating Stratocumulus</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Hoffmann</surname>
<given-names>Fabian</given-names>
<ext-link>https://orcid.org/0000-0001-5136-0653</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>Chen</surname>
<given-names>Yao-Sheng</given-names>
<ext-link>https://orcid.org/0000-0002-0835-4132</ext-link>
</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>Feingold</surname>
<given-names>Graham</given-names>
<ext-link>https://orcid.org/0000-0002-0774-2926</ext-link>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Ludwig-Maximilans-Universität München, Meteorologisches Institut, Munich, Germany</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado, USA</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>Chemical Sciences Laboratory, NOAA, Boulder, Colorado, USA</addr-line>
</aff>
<pub-date pub-type="epub">
<day>18</day>
<month>12</month>
<year>2024</year>
</pub-date>
<volume>2024</volume>
<fpage>1</fpage>
<lpage>21</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2024 Fabian Hoffmann et al.</copyright-statement>
<copyright-year>2024</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/2024/egusphere-2024-3893/">This article is available from https://egusphere.copernicus.org/preprints/2024/egusphere-2024-3893/</self-uri>
<self-uri xlink:href="https://egusphere.copernicus.org/preprints/2024/egusphere-2024-3893/egusphere-2024-3893.pdf">The full text article is available as a PDF file from https://egusphere.copernicus.org/preprints/2024/egusphere-2024-3893/egusphere-2024-3893.pdf</self-uri>
<abstract>
<p>Cloud-water adjustments are a part of aerosol-cloud interactions, affecting the ability of clouds to reflect shortwave radiation by processes altering the vertically integrated cloud water content &lt;em&gt;L&lt;/em&gt; in response to changes in the droplet concentration &lt;em&gt;N&lt;/em&gt;. In this study, we utilize a simple entrainment parameterization for mixed-layer models to determine entrainment-mediated cloud-water adjustments in non-precipitating stratocumulus. At lower &lt;em&gt;N&lt;/em&gt;, &lt;em&gt;L&lt;/em&gt; decreases due to an increase in entrainment in response to an increase in &lt;em&gt;N&lt;/em&gt; suppressing the stabilizing effect of evaporating precipitation (virga) on boundary layer dynamics. At higher &lt;em&gt;N&lt;/em&gt;, the cessation of cloud-droplet sedimentation sustains more liquid water at the cloud top, and hence stronger preconditioning of free-tropospheric air, which increases entrainment with &lt;em&gt;N&lt;/em&gt;. Overall, cloud-water adjustments are found to weaken distinctly from dln(&lt;em&gt;L&lt;/em&gt;)/dln(&lt;em&gt;N&lt;/em&gt;)=-0.48 at &lt;em&gt;N&lt;/em&gt;=100 cm&lt;sup&gt;-3&lt;/sup&gt; to -0.03 at &lt;em&gt;N&lt;/em&gt;=1000 cm&lt;sup&gt;-3&lt;/sup&gt;, indicating that a single value to describe cloud-water adjustments in non-precipitating clouds is insufficient. Based on these results, we speculate that cloud-water adjustments at lower &lt;em&gt;N&lt;/em&gt; are associated with slow changes in boundary layer dynamics, while a faster response is associated with the preconditioning of free-tropospheric air at higher &lt;em&gt;N&lt;/em&gt;.</p>
</abstract>
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<funding-group>
<award-group id="gs1">
<funding-source>Deutsche Forschungsgemeinschaft</funding-source>
<award-id>HO6588/1-1</award-id>
</award-group>
<award-group id="gs2">
<funding-source>National Oceanic and Atmospheric Administration</funding-source>
<award-id>CI 03-01-07-001</award-id>
</award-group>
</funding-group>
</article-meta>
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