Preprints
https://doi.org/10.5194/acp-2021-350
https://doi.org/10.5194/acp-2021-350

  29 Apr 2021

29 Apr 2021

Review status: a revised version of this preprint was accepted for the journal ACP and is expected to appear here in due course.

Overview towards improved understanding of the mechanisms leading to heavy precipitation in the Western Mediterranean: lessons learned from HyMeX

Samira Khodayar1,2, Silvio Davolio3, Paolo Di Girolamo4, Cindy Lebeaupin Brossier5, Emmanouil Flaounas6, Nadia Fourrie5, Keun-Ok Lee7,8, Didier Ricard5, Benoit Vie5, Francois Bouttier5, Alberto Caldas-Alvarez2, and Veronique Ducrocq5 Samira Khodayar et al.
  • 1Mediterranean Centre for Environmental Studies (CEAM), Valencia, Spain
  • 2Institute of Meteorology and Climate Research (IMK-TRO), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
  • 3National Research Council of Italy, Institute of Atmospheric Sciences and Climate, (CNR-ISAC), Bologna, Italy
  • 4Scuola di Ingegneria, Università degli Studi della Basilicata (SI-UNIBAS), Potenza, Italy
  • 5CNRM, Université de Toulouse, Météo-France, CNRS, Toulouse, France
  • 6Institute of Oceanography, Hellenic Centre for Marine Research (HCMR), Athens, Greece
  • 7Laboratoire d’Aérologie, Université de Toulouse, CNRS, UPS, Toulouse, France
  • 8Laboratoire de L'Atmosphère et des Cyclones, UMR 8105 (CNRS, Université de La Réunion, Météo- France), Saint Denis, France

Abstract. Heavy precipitation (HP) constitutes a major meteorological threat in the western Mediterranean (WMed). Every year, recurrent events affect the area with fatal consequences on infrastructure and personal losses. Despite this being a well-known issue, widely investigated in the past, still open questions remain. Particularly, the understanding of the underlying mechanisms and the modelling representation of the events must be improved. One of the major goals of the Hydrological cYcle in the Mediterranean eXperiment (HyMeX; 2010–2020) has been to advance knowledge on this topic. In this article we present an overview of the most recent lessons learned from HyMeX towards improved understanding of the mechanisms leading to HP in the WMed.

The unique network of instruments deployed, the use of finer model resolutions and of coupled models, provided an unprecedented opportunity to validate numerical model simulations, to develop improved parameterizations, designing high-resolution ensemble modelling approaches and sophisticated assimilation techniques across scales.

All in all, HyMeX and particularly the science team heavy precipitation favoured the evidencing of theoretical results, the enrichment of our knowledge on the genesis and evolution of convection in a complex topography environment, and the improvement of precipitation forecasts. Illustratively, the intervention of cyclones and warm conveyor belts in the occurrence of heavy precipitation has been pointed out, the crucial role of the spatio-temporal distribution of the atmospheric water vapor for the understanding and accurate forecast of the timing and location of deep convection has been evidenced, as well as the complex interaction among processes across scales. The importance of soil and ocean conditions and the interactions among systems were highlighted and such systems were specifically developed in the framework of HyMeX to improve the realism of weather forecasts. Furthermore, the benefits of cross-disciplinary efforts within HyMeX have been a key asset in bringing a step forward our knowledge about heavy precipitation in the Mediterranean region.

Samira Khodayar et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2021-350', Anonymous Referee #1, 31 May 2021
    • AC1: 'Reply on RC1', Samira Khodayar Pardo, 06 Aug 2021
  • RC2: 'Comment on acp-2021-350', Anonymous Referee #2, 01 Jun 2021
    • AC2: 'Reply on RC2', Samira Khodayar Pardo, 06 Aug 2021

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2021-350', Anonymous Referee #1, 31 May 2021
    • AC1: 'Reply on RC1', Samira Khodayar Pardo, 06 Aug 2021
  • RC2: 'Comment on acp-2021-350', Anonymous Referee #2, 01 Jun 2021
    • AC2: 'Reply on RC2', Samira Khodayar Pardo, 06 Aug 2021

Samira Khodayar et al.

Samira Khodayar et al.

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Short summary
Heavy precipitation (HP) constitutes a major meteorological threat in the western Mediterranean. Every year, recurrent events affect the area with fatal consequences. Despite this being a well-known issue, still open questions remain. The understanding of the underlying mechanisms and the modelling representation of the events must be improved. In this article we present the most recent lessons learned from the Hydrological cYcle in the Mediterranean eXperiment (HyMeX).
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