Two case studies of severe storms in the Mediterranean using AMSU

Funatsu, Beatriz M.; Claud, Chantal; Chaboureau, Jean‐Pierre

doi:10.5194/adgeo-12-19-2007

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…They suggest a deep convective threshold (DCT) corresponding to an accumulated rainfall of at least 20 mm in 3 h in 50 % of the cases in the MR. This threshold was validated by Funatsu et al (2007a, b) with radar and rain gauges from meteorological ground stations for selected heavy precipitation events.…”

Section: Spatial Distribution Of Deep Convective Precipitation Over Tmentioning

confidence: 99%

Review Article: Atmospheric conditions inducing extreme precipitation over the eastern and western Mediterranean

Dayan

Nissen

Ulbrich

2015

Nat. Hazards Earth Syst. Sci.

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Abstract. This review discusses published studies of heavy rainfall events over the Mediterranean Basin, combining them in a more general picture of the dynamic and thermodynamic factors and processes that produce heavy rain storms. It distinguishes the western and eastern Mediterranean in order to point out specific regional peculiarities. The crucial moisture for developing intensive convection over these regions can be originated not only from the adjacent Mediterranean Sea but also from distant upwind sources. Transport from remote sources is usually in the mid-tropospheric layers and associated with specific features and patterns of the larger-scale circulations. The synoptic systems (tropical and extratropical) that account for most of the major extreme precipitation events and the coupling of circulation and extreme rainfall patterns are presented. Heavy rainfall over the Mediterranean Basin is caused at times in concert by several atmospheric processes working at different atmospheric scales, such as local convection, upper synoptic-scale-level troughs, and mesoscale convective systems. Under tropical air-mass intrusions, convection generated by static instability seems to play a more important role than synoptic-scale vertical motions. Locally, the occurrence of torrential rains and their intensity is dependent on factors such as temperature profiles and implied instability, atmospheric moisture, and lower-level convergence.

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Section: Spatial Distribution Of Deep Convective Precipitation Over Tmentioning

confidence: 99%

Review Article: Atmospheric conditions inducing extreme precipitation over the eastern and western Mediterranean

Dayan

Nissen

Ulbrich

2015

Nat. Hazards Earth Syst. Sci.

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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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Review Article: Atmospheric conditions inducing extreme precipitation over the Eastern and Western Mediterranean

Dayan¹,

Nissen²,

Ulbrich³

2015

Preprint

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Abstract. This review discusses published studies of heavy rainfall events over the Mediterranean Basin, combining them in a more general picture of the dynamic and thermodynamic factors and processes producing heavy rain storms. It distinguishes the Western and Eastern Mediterranean in order to point at specific regional peculiarities. The crucial moisture for developing intensive convection over these regions can be originated not only from the adjacent Mediterranean Sea but also from distant upwind sources. Transport from remote sources is usually in the mid-tropospheric layers and associated with specific features and patterns of the larger scale circulations. The synoptic systems (tropical and extra-tropical) accounting for most of the major extreme precipitation events and the coupling of circulation and extreme rainfall patterns are presented. Heavy rainfall over the Mediterranean Basin is caused at times in concert by several atmospheric processes working at different atmospheric scales, such as local convection, upper-level synoptic-scale troughs, and meso-scale convective systems. Under tropical air mass intrusions, convection generated by static instability seems to play a more important role than synoptic-scale vertical motions. Locally, the occurrence of torrential rains and their intensity is dependent on factors such as temperature profiles and implied instability, atmospheric moisture, and lower-level convergence.

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Two case studies of severe storms in the Mediterranean using AMSU

Cited by 3 publications

References 19 publications

Review Article: Atmospheric conditions inducing extreme precipitation over the eastern and western Mediterranean

Review Article: Atmospheric conditions inducing extreme precipitation over the eastern and western Mediterranean

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

Review Article: Atmospheric conditions inducing extreme precipitation over the Eastern and Western Mediterranean

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