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<p>Dear Dennis,<br></p>
<p>thanks for clarifications, that's exactly was I looking for.</p>
<p>Regards,<br></p>
<p>Markus<br></p>
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Il 03/09/2021 18:03 Dennis Shea <shea@ucar.edu> ha scritto:
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<p>"I found the function <span style="font-size: 12pt;"><strong>vinth2p_ecmwf</strong></span> very useful for my purpose, but I am a bit puzzled if it is right to use it with all the models.:</p>
<p>The difference between <span style="font-size: 12pt;"><strong>vinth2p</strong></span> and <span style="font-size: 12pt;"><strong>vinth2p_ecmwf </strong><br></span></p>
<p>is that the latter uses "an ECMWF formulation to extrapolate values below ground."</p>
<p>If the pressures at hybrid levels are computed using the dimensionless coefficients (A, B):</p>
<pre> p(k) = A(k)*PO + B(k)*PS <br></pre>
<pre>then yes.<br>====<br>Some models output a hybrid component, <em>Ap(k) [=A(k)*p0]</em>, which has units
of pressure. This must be made dimensionless <em>prior</em> to use.
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<pre> <br></pre>
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On Fri, Sep 3, 2021 at 2:20 AM markus mingel via ncl-talk <<a href="mailto:ncl-talk@mailman.ucar.edu">ncl-talk@mailman.ucar.edu</a>> wrote:
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<p>Dear All,<br></p>
<p>I would convert CMIP6 models from hybrid coordinates to pressure levels. I found the function <span style="font-size: 12pt;"><strong>vinth2p_ecmwf</strong></span> very useful for my purpose, but I am a bit puzzled if it is right using it with all the models. In fact, the description of the function reports: "<em>Interpolates CESM hybrid coordinates to pressure coordinates</em>", so I do not know if it works with all models (except CESM) even if they are in hybrid coordinates.</p>
<p>Any clarification is welcome,<br></p>
<p>Best Regards,<br></p>
<p>Markus<br></p>
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