Cloud systems leading to flood events in Europe: an overview and classification

Porcú, Federico; Caracciolo, C.; Prodi, F.

doi:10.1017/s1350482703003025

Cited by 20 publications

(11 citation statements)

References 19 publications

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“…Figure 12 shows that NCP is more frequent over land, at the upper-half of the domain, while extreme DC is found more evenly distributed over the domain. Summer occurrences are the smallest for both cases, but extreme DC is more frequent in autumn and winter, in agreement with findings of Porcù et al (2003).…”

Section: Southern Coast Of Turkeysupporting

confidence: 89%

Comparison between the Large-Scale Environments of Moderate and Intense Precipitating Systems in the Mediterranean Region

Funatsu

Claud

Chaboureau

2009

Monthly Weather Review

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International audienceA characterization of the large-scale environment associated with precipitating systems in the Mediterranean region, based mainly on NOAA-16 Advanced Microwave Sounding Unit (AMSU) observations from 2001 to 2007, is presented. Channels 5, 7, and 8 of AMSU-A are used to identify upper-level features, while a simple and tractable method, based on combinations of channels 3-5 of AMSU-B and insensitive to land-sea contrast, was used to identify precipitation. Rain occurrence is widespread over the Mediterranean in wintertime while reduced or short lived in the eastern part of the basin in summer. The location of convective precipitation shifts from mostly over land from April to August, to mostly over the sea from September to December. A composite analysis depicting large-scale conditions, for cases of either rain alone or extensive areas of deep convection, is performed for selected locations where the occurrence of intense rainfall was found to be important. In both cases, an upper-level trough is seen to the west of the target area, but for extreme rainfall the trough is narrower and has larger amplitude in all seasons. In general, these troughs are also deeper for extreme rainfall. Based on the European Centre for Medium-Range Weather Forecasts operational analyses, it was found that sea surface temperature anomalies composites for extreme rainfall are often about 1 K warmer, compared to nonconvective precipitation conditions, in the vicinity of the affected area, and the wind speed at 850 hPa is also stronger and usually coming from the sea

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Section: Southern Coast Of Turkeysupporting

confidence: 89%

Comparison between the Large-Scale Environments of Moderate and Intense Precipitating Systems in the Mediterranean Region

Funatsu

Claud

Chaboureau

2009

Monthly Weather Review

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“…MEDEX project for high impact cyclones in the Mediterranean area; http: //medex.inm.uib.es). A classification of cloud systems responsible for flood events in Europe has been proposed in Porcù et al (2003) while, more recently, Homar et al (2007) have analyzed the sensitivity patterns of high impact weather related to intense cyclones in the Mediterranean basin. This latter study highlights the needs of a more homogenous, hopefully adaptive, observations deployment in order to reduce cyclonic systems prediction errors.…”

Section: Introductionmentioning

confidence: 99%

Toward an estimation of the relationship between cyclonic structures and damages at the ground in Europe

Porcú

Carrassi

2009

Nat. Hazards Earth Syst. Sci.

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Abstract.Cyclonic systems dominate European and Mediterranean meteorology throughout the year and often induce severe weather in terms of heavy and/or long-lasting precipitation with related phenomena such as strong winds and lightning. Surface cyclonic structures are often related to well defined precipitation patterns with different scales, duration and intensity. Cyclones confined in the upper troposphere, usually referred to as cut off low, may induce instability at lower levels and the development of convective precipitation.In this work the occurrence of cyclonic events (discriminated between surface ones and cut-off lows) is analyzed and matched with an economic losses database to highlight a relation between the atmospheric structures and the impact on the social environment in terms of casualties and material damages. The study focus on the continental Europe and, based on the ERA-40 reanalysis, two databases of surface cyclones and cut-off lows have been constructed by means of automatic pattern recognition algorithms. The impact on the local communities is estimated from an insurance company record, which provides the location, date and type of the events, as well as related losses in terms of damages and casualties. Results show the relatively high impact of cyclonic structures on human life in Europe: most of the weather induced damages occur close to a cyclonic center, especially during warm months. Damages and human losses are more frequent from late summer to January, and precipitation is the most relevant meteorological damaging feature throughout the year.

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“…As a consequence, a double front-like structure formed west of Italy as confirmed by numerical simulations and Meteosat satellite images (Buzzi et al (1998); Doswell III et al (1998)). This configuration is not uncommon in the western Mediterranean; see for instance the discussions in Buzzi et al (1998) and Porcú et al (2003). It is often associated, as in the P94 case, with intense precipitations in the Alpine region; see the plots in Fig.…”

Section: Synoptic Overviewmentioning

confidence: 79%

Reforecasting the November 1994 flooding of Piedmont with a convection-permitting model

Capecchi¹

2020

Bull. of Atmos. Sci.& Technol.

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The Piedmont region in Italy was affected by a heavy rainfall event in November 1994. On the 4th convective cells involved the coastal mountains of the region. On the 5th and early 6th, there were abundant precipitations, related to orographic lift and low-level convergences, in the Alpine area. This study aims to evaluate whether a convection-permitting model provides more valuable information with respect to past numerical experiments. Results for the 4th of November show that the high-resolution model successfully reconstructs the structure of precipitation systems on the downstream side of the coastal mountains. As regards the precipitations of the 5th of November, no added value is found. However, we provide evidence of the anomalously intense transport of moist air from the tropical and subtropical Atlantic and postulate how such transport is responsible for reducing the stability of the flow impinging on the Alps.

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Cloud systems leading to flood events in Europe: an overview and classification

Cited by 20 publications

References 19 publications

Comparison between the Large-Scale Environments of Moderate and Intense Precipitating Systems in the Mediterranean Region

Comparison between the Large-Scale Environments of Moderate and Intense Precipitating Systems in the Mediterranean Region

Toward an estimation of the relationship between cyclonic structures and damages at the ground in Europe

Reforecasting the November 1994 flooding of Piedmont with a convection-permitting model

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