Cutoff low systems and their relevance to large-scale extreme precipitation in the European Alps

In this paper, we attempt to highlight the relevance of cutoff low systems (CoLs) to large-scale heavy precipitation events within the Alpine region which often lead to catastrophic flooding. The main results of this study are (1) a detailed climatology (1971–1999) of CoLs for the European region, (...

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Bibliographic Details
Published in:Theoretical and applied climatology 2017-07, Vol.129 (1-2), p.149-158
Main Authors: Awan, N. K., Formayer, H.
Format: Article
Language:English
Subjects:
Alpine environments
Alpine regions
Aquatic Pollution
Area
Atmospheric precipitations
Atmospheric Protection/Air Quality Control/Air Pollution
Atmospheric Sciences
Catastrophic events
Climate
Climate science
Climatology
Correlation
Cut-off
Earth and Environmental Science
Earth Sciences
Extreme weather
Flooding
Heavy precipitation
Identification
Original Paper
Precipitation
Precipitation (Meteorology)
Regions
Summer
Temperature effects
Waste Water Technology
Water Management
Water Pollution Control
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Summary:In this paper, we attempt to highlight the relevance of cutoff low systems (CoLs) to large-scale heavy precipitation events within the Alpine region which often lead to catastrophic flooding. The main results of this study are (1) a detailed climatology (1971–1999) of CoLs for the European region, (2) contribution of CoLs to extreme precipitation events in the European Alpine region, (3) identification of regions within the European Alps most affected by extreme precipitation caused by CoLs, and (4) identification of regions where presence of CoLs is related to extreme precipitation in the Alpine region. The findings of this paper suggest that CoLs have a significant correlation with extreme precipitation events and strongly influence the climate of the Alpine region. The total contribution of CoLs to large-scale heavy precipitation events ranges between 20 and 95 % and is most pronounced in the northern and eastern parts of the Alps. More than 80 % of the events occur in the summer season. The area around the Alps and West of Spain (over the Atlantic Ocean) is the most affected region. The location of the center of CoLs that affect the Alpine region most occur on the northern and southern sides of the Alpine ridge.
ISSN:0177-798X
1434-4483
DOI:10.1007/s00704-016-1767-0