Atmospheric Forcing of Debris Flows in the Southern Swiss Alps
| Autor: | Jürg Luterbacher, Michelle Schneuwly-Bollschweiler, Andrea Toreti, Markus Stoffel |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Convection
ddc:333.7-333.9 Rainfall Atmospheric Science 010504 meteorology & atmospheric sciences Hydrometeorology Flow (psychology) 0207 environmental engineering Mesoscale meteorology 02 engineering and technology Forcing (mathematics) Extreme events Atmospheric sciences 01 natural sciences Debris Instability Europe Atmospheric circulation 13. Climate action Climatology Environmental science Precipitation Predictability 020701 environmental engineering 0105 earth and related environmental sciences |
| Zdroj: | Journal of Applied Meteorology and Climatology, Vol. 52, No 7 (2013) pp. 1554-1560 Journal of Applied Meteorology and Climatology |
| ISSN: | 1558-8432 |
| Popis: | This article addresses the role of large-scale circulation and thermodynamical features in the release of past debris flows in the Swiss Alps by using classification algorithms, potential instability, and convective time scale. The study is based on a uniquely dense dendrogeomorphic time series of debris flows covering the period 1872–2008, reanalysis data, instrumental time series, and gridded hourly precipitation series (1992–2006) over the area. Results highlight the crucial role of synoptic and mesoscale forcing as well as of convective equilibrium on triggering rainfalls. Two midtropospheric synoptic patterns favor anomalous southwesterly flow toward the area and high potential instability. These findings imply a certain degree of predictability of debris-flow events and can therefore be used to improve existing alert systems. |
| Databáze: | OpenAIRE |
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