Diabatic processes modulating the vertical structure of the jet stream above the cold front of an extratropical cyclone: sensitivity to deep convection schemes
Meryl Wimmer,Gwendal Rivière,Philippe Arbogast,Jean-Marcel Piriou,Julien Delanoë,Carole Labadie,Quitterie Cazenave,and Jacques Pelon
CNRM, Université de Toulouse, Météo-France, CNRS, Toulouse, France
Laboratoire de Météorologie Dynamique/IPSL, Ecole Normale Supérieure, PSL Research University, Sorbonne University, École Polytechnique, IP Paris, CNRS, Paris, France
Laboratoire de Météorologie Dynamique/IPSL, Ecole Normale Supérieure, PSL Research University, Sorbonne University, École Polytechnique, IP Paris, CNRS, Paris, France
Philippe Arbogast
Direction des Opérations pour la prévision, Météo-France, Toulouse, France
Jean-Marcel Piriou
CNRM, Université de Toulouse, Météo-France, CNRS, Toulouse, France
Julien Delanoë
LATMOS-IPSL, CNRS/INSU, University of Versailles, Guyancourt, France
Carole Labadie
CNRM, Université de Toulouse, Météo-France, CNRS, Toulouse, France
Quitterie Cazenave
LATMOS-IPSL, CNRS/INSU, University of Versailles, Guyancourt, France
Jacques Pelon
LATMOS-IPSL, CNRS/INSU, University of Versailles, Guyancourt, France
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The effect of deep convection representation on the jet stream above the cold front of an extratropical cyclone is investigated in the global numerical weather prediction model ARPEGE. Two simulations using different deep convection schemes are compared with (re)analysis datasets and NAWDEX airborne observations. A deeper jet stream is observed with the less active scheme. The diabatic origin of this difference is interpreted by backward Lagrangian trajectories and potential vorticity budgets.
The effect of deep convection representation on the jet stream above the cold front of an...
