Universität zu Köln

Arteaga, Diana, Planche, Celine, Kagkara, Christina, Wobrock, Wolfram, Banson, Sandra, Tridon, Frederic and Flossmann, Andrea (2020). Evaluation of Two Cloud-Resolving Models Using Bin or Bulk Microphysics Representation for the HyMeX-IOP7a Heavy Precipitation Event. Atmosphere, 11 (11). BASEL: MDPI. ISSN 2073-4433

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Abstract

The Mediterranean region is frequently affected in autumn by heavy precipitation that causes flash-floods or landslides leading to important material damage and casualties. Within the framework of the international HyMeX program (HYdrological cycle in Mediterranean EXperiment), this study aims to evaluate the capabilities of two models, WRF (Weather Research and Forecasting) and DESCAM (DEtailed SCAvenging Model), which use two different representations of the microphysics to reproduce the observed atmospheric properties (thermodynamics, wind fields, radar reflectivities and precipitation features) of the HyMeX-IOP7a intense precipitating event (26 September 2012). The DESCAM model, which uses a bin resolved representation of the microphysics, shows results comparable to the observations for the precipitation field at the surface. On the contrary, the simulations made with the WRF model using a bulk representation of the microphysics (either the Thompson scheme or the Morrison scheme), commonly employed in NWP models, reproduce neither the intensity nor the distribution of the observed precipitation-the rain amount is overestimated and the most intense cell is shifted to the East. The different simulation results show that the divergence in the surface precipitation features seems to be due to different mechanisms involved in the onset of the precipitating system: the convective system is triggered by the topography of the Cevennes mountains (i.e., south-eastern part of the Massif Central) in DESCAM and by a low-level flux convergence in WRF. A sensitivity study indicates that the microphysics properties have impacted the thermodynamics and dynamics fields inducing the low-level wind convergence simulated with WRF for this HyMeX event.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Arteaga, Diana UNSPECIFIED UNSPECIFIED UNSPECIFIED Planche, Celine UNSPECIFIED UNSPECIFIED UNSPECIFIED Kagkara, Christina UNSPECIFIED UNSPECIFIED UNSPECIFIED Wobrock, Wolfram UNSPECIFIED UNSPECIFIED UNSPECIFIED Banson, Sandra UNSPECIFIED UNSPECIFIED UNSPECIFIED Tridon, Frederic UNSPECIFIED UNSPECIFIED UNSPECIFIED Flossmann, Andrea UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-313079
DOI:	10.3390/atmos11111177
Journal or Publication Title:	Atmosphere
Volume:	11
Number:	11
Date:	2020
Publisher:	MDPI
Place of Publication:	BASEL
ISSN:	2073-4433
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PART I; SQUALL LINE; NUMERICAL SIMULATIONS; EXPLICIT FORECASTS; ICE-NUCLEATION; SEVERE STORM; SENSITIVITY; SCHEME; PARAMETERIZATION; RAINFALL Multiple languages Meteorology & Atmospheric Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/31307