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Hydrol. Earth Syst. Sci., 18, 1953-1977, 2014
www.hydrol-earth-syst-sci.net/18/1953/2014/
doi:10.5194/hess-18-1953-2014
© Author(s) 2014. This work is distributed
under the Creative Commons Attribution 3.0 License.
Overview of the first HyMeX Special Observation Period over Italy: observations and model results
R. Ferretti1, E. Pichelli1, S. Gentile1, I. Maiello1, D. Cimini1,2, S. Davolio3, M. M. Miglietta4, G. Panegrossi5, L. Baldini5, F. Pasi6,10, F. S. Marzano1,7, A. Zinzi8, S. Mariani9, M. Casaioli9, G. Bartolini10, N. Loglisci11, A. Montani12, C. Marsigli12, A. Manzato13, A. Pucillo13, M. E. Ferrario14, V. Colaiuda1, and R. Rotunno15
1CETEMPS, Department of Physics, University of L'Aquila, L'Aquila, Italy
2Institute of Methodologies for Environmental Analysis, CNR IMAA, Potenza, Italy
3Institute of Atmospheric Sciences and Climate, CNR ISAC, Bologna, Italy
4Institute of Atmospheric Sciences and Climate, CNR ISAC, Lecce, Italy
5Institute of Atmospheric Sciences and Climate, CNR ISAC, Rome, Italy
6Institute of Biometeorology, CNR IBIMET, Florence, Italy
7Department of Information Engineering, Electronics and Telecommunications DIET, Sapienza University, Rome, Italy
8ASI Science Data Center (ASDC), Rome, INAF-OAR, Monte Porzio Catone (Rome) Italy, University of Naples "Parthenope", Naples, Italy
9Institute for Environmental Protection and Research, ISPRA, Rome, Italy
10LaMMA Consortium, Florence, Italy
11ARPA Piemonte – Weather Forecasting Department, Turin, Italy
12ARPA Emilia Romagna – SIMC, Bologna, Italy
13ARPA Friuli Venezia Giulia – OSMER, Visco (Udine), Italy
14ARPA Veneto, Servizio Meteorologico, Teolo (Padua), Italy
15NCAR, Boulder, (CO), USA

Abstract. The Special Observation Period (SOP1), part of the HyMeX campaign (Hydrological cycle in the Mediterranean Experiments, 5 September–6 November 2012), was dedicated to heavy precipitation events and flash floods in the western Mediterranean, and three Italian hydro-meteorological monitoring sites were identified: Liguria–Tuscany, northeastern Italy and central Italy. The extraordinary deployment of advanced instrumentation, including instrumented aircrafts, and the use of several different operational weather forecast models, including hydrological models and marine models, allowed an unprecedented monitoring and analysis of high-impact weather events around the Italian hydro-meteorological sites. This activity has seen strong collaboration between the Italian scientific and operational communities. In this paper an overview of the Italian organization during SOP1 is provided, and selected Intensive Observation Periods (IOPs) are described. A significant event for each Italian target area is chosen for this analysis: IOP2 (12–13 September 2012) in northeastern Italy, IOP13 (15–16 October 2012) in central Italy and IOP19 (3–5 November 2012) in Liguria and Tuscany. For each IOP the meteorological characteristics, together with special observations and weather forecasts, are analyzed with the aim of highlighting strengths and weaknesses of the forecast modeling systems, including the hydrological impacts. The usefulness of having different weather forecast operational chains characterized by different numerical weather prediction models and/or different model set up or initial conditions is finally shown for one of the events (IOP19).

Citation: Ferretti, R., Pichelli, E., Gentile, S., Maiello, I., Cimini, D., Davolio, S., Miglietta, M. M., Panegrossi, G., Baldini, L., Pasi, F., Marzano, F. S., Zinzi, A., Mariani, S., Casaioli, M., Bartolini, G., Loglisci, N., Montani, A., Marsigli, C., Manzato, A., Pucillo, A., Ferrario, M. E., Colaiuda, V., and Rotunno, R.: Overview of the first HyMeX Special Observation Period over Italy: observations and model results, Hydrol. Earth Syst. Sci., 18, 1953-1977, doi:10.5194/hess-18-1953-2014, 2014.
 
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