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<front>
<journal-meta>
<journal-id journal-id-type="publisher">HESS</journal-id>
<journal-title-group>
<journal-title>Hydrology and Earth System Sciences</journal-title>
<abbrev-journal-title abbrev-type="publisher">HESS</abbrev-journal-title>
<abbrev-journal-title abbrev-type="nlm-ta">Hydrol. Earth Syst. Sci.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1607-7938</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/hess-13-1307-2009</article-id>
<title-group>
<article-title>Reply to A. G. C. A. Meesters et al.&apos;s comment on &quot;Biotic pump of atmospheric moisture as driver of the  hydrological cycle on land&quot;</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Makarieva</surname>
<given-names>A. M.</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>Gorshkov</surname>
<given-names>V. G.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg, Russia</addr-line>
</aff>
<pub-date pub-type="epub">
<day>24</day>
<month>07</month>
<year>2009</year>
</pub-date>
<volume>13</volume>
<issue>7</issue>
<fpage>1307</fpage>
<lpage>1311</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2009 A. M. Makarieva</copyright-statement>
<copyright-year>2009</copyright-year>
<license license-type="open-access">
<license-p>This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit <ext-link ext-link-type="uri"  xlink:href="https://creativecommons.org/licenses/by/3.0/">https://creativecommons.org/licenses/by/3.0/</ext-link></license-p>
</license>
</permissions>
<self-uri xlink:href="https://hess.copernicus.org/articles/13/1307/2009/hess-13-1307-2009.html">This article is available from https://hess.copernicus.org/articles/13/1307/2009/hess-13-1307-2009.html</self-uri>
<self-uri xlink:href="https://hess.copernicus.org/articles/13/1307/2009/hess-13-1307-2009.pdf">The full text article is available as a PDF file from https://hess.copernicus.org/articles/13/1307/2009/hess-13-1307-2009.pdf</self-uri>
<abstract>
<p>Condensation removes water vapor molecules from the gas phase and reduces the weight of the air column. This disturbs
hydrostatic equilibrium and makes air circulate under the action of the recently described evaporative
force. Meesters, Dolman and Bruijnzeel (2009) criticized the physical bases of the new circulation
driver with a major claim that the ascending air motions induced by the evaporative force should rapidly restore the
hydrostatic equilibrium and become extinguished. Here we respond that in fact these air motions sustain the
disequilibrium of air pressure through the reduction of the weight of the air column via condensation that
continuously occurs as the ascending moist air cools. In the traditional meteorological paradigm condensation
is primarily considered in terms of the effect it has, via latent heat release, on air &lt;i&gt;density&lt;/i&gt;, while its
immediate effect on the &lt;i&gt;weight&lt;/i&gt; of air column is not accounted for. The critique of Meesters et al. is
therefore informative in highlighting the traditional lines of thought that should be re-visited to incorporate the new
physical knowledge. Such an effort is arguably worthy of undertaking as the evaporative force concept bears tangible
potential for solving some of the key problems that are challenging modern atmospheric science.</p>
</abstract>
<counts><page-count count="5"/></counts>
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</front>
<body/>
<back>
<ref-list>
<title>References</title>
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</article>