Evolution of a subgrid deep convection parameterisation in a limited area model with increasing resolution
Evolution d'une paramétrisation de la convection profonde en dessous de la maille d'un modèle à aire limitée selon une résolution croissante
Gérard, L. ; Geleyn, J.-F.
<br><h3 style="margin:0cm;margin-bottom:.0001pt;text-align:justify"><span style="font-size:11.0pt;mso-bidi-font-size:13.5pt;font-family:"Times New Roman";<br>mso-ansi-language:EN-GB;font-weight:normal" lang="EN-GB">Abstract</span></h3><br><br><p style="margin:0cm;margin-bottom:.0001pt;text-align:justify"><span style="font-size:11.0pt;mso-bidi-font-size:12.0pt;font-family:"Times New Roman";<br>mso-ansi-language:EN-GB" lang="EN-GB">The adaptation of a convective parametrization to high<br>resolution has been successfully performed, to a certain point, by refinements<br>in the representation of the entrainment, detrainment and some other features<br>of the original general-circulation-model oriented scheme. But, passing to<br>resolutions below 10 km requires dispensing with some fundamental hypotheses,<br>starting with quasi-equilibrium and the assumption of negligible up- and downdraught<br>mesh fractions. A prognostic scheme has been used for the draughts' vertical<br>velocities and mesh fractions. The prognostic closure of the convective scheme<br>has many benefits, but additional enhancements are required, starting with a<br>coherent treatment of the cloud condensates and a more integrated combination<br>of the different schemes producing condensation, cloud and precipitation.</span></p><div align="justify"><br><br><span style="font-size:11.0pt;mso-bidi-font-size:12.0pt;font-family:<br>"Times New Roman";mso-fareast-font-family:"Times New Roman";mso-ansi-language:<br>EN-GB;mso-fareast-language:FR;mso-bidi-language:AR-SA" lang="EN-GB">Copyright © 2005 Royal<br>Meteorological Society</span></div>
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