CYclogenesis COnvection RAdiation modifications package
the so-called CYCORA suit
Latest developments about cyclogenesis, convection and radiation were
compiled and tested in a parallel suit in Météo-France with
additional testing performed with ALADIN/LACE in Prague and ALADIN/Belgium in
Brussels. After some tunings, the proposed modifications have been validated
and are fully operational in ARPEGE and ALADIN/France. They had benefied from
the work of .E. Bazile, D. Banciu, M. Bellus, J. Boutahar, J.-F. Geleyn, L.
Gérard, V. Pastircak, C. Madeira, J.-M. Piriou, M. Sandev, A. Simon on :
Recent developments for the deep convection parametrization in the
ARPEGE/ALADIN model such as :
- the downdraft parametrization,
- a Gregory-Kershaw approach for momentum convective redistribution,
- the modification of the saturated adiabat computation,
- a limitation of the available humidity for convective updraft parametrization,
- an enhanced detrainment rate at the cloud top,
- a new formulation of the entrainment rate;
Recent developments for the vertical turbulent transport and associated
clou-cover parametrizations such as :
- a vertically varying limitation for the very stable case parametrization,
- a new version of the stratiform cloud-cover parametrization including
sub-inversion cloudiness.
