Meroni A. N. auteur aut IRD Renault Lionel auteur aut IRD Parodi A. auteur aut IRD Pasquero C. auteur aut IRD text journalArticle eng text/pdf born digital access The importance of the upper ocean thermal vertical structure (mixed-layer depth and stratification) in the control of the precipitation during a heavy-rain-producing mesoscale convective system is investigated by means of numerical simulations. In particular, the fully compressible, nonhydrostatic Euler equations for the atmosphere and the hydrostatic Boussinesq equations for the ocean are numerically integrated to study the effect of the ocean-atmosphere coupling both with realistic initial and boundary conditions and with simpler, analytical vertical temperature profile forcing. It is found that the action of the winds associated with the synoptic system, in which the heavy precipitation event is embedded, can entrain deep and cold water in the oceanic mixed layer, generating surface cooling. In the case of a shallow mixed layer and strongly stratified water column, this decrease in sea surface temperature can significantly reduce the air column instability and, thus, the total amount of precipitation produced. specialized Heavy precipitation events mesoscale convective systems air-sea interactions coupled numerical simulations MEDITERANNEE LIGURIE MER 032 021 020 175 11 4111-4130 2018 0033-4553 https://www.documentation.ird.fr/hor/fdi:010074404 10.1007/s00024-018-2002-y 0033-4553 [F B010074404] https://www.documentation.ird.fr/hor/fdi:010074404 https://www.documentation.ird.fr/intranet/publi/2018/11/010074404.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2018-12-06 2018-12-06 fdi:010074404 fre