DOI: 10.1016/j.atmosres.2018.03.007
Scopus记录号: 2-s2.0-85044928215
论文题名: A severe hail storm in complex topography in Switzerland - Observations and processes
作者: Trefalt S. ; Martynov A. ; Barras H. ; Besic N. ; Hering A.M. ; Lenggenhager S. ; Noti P. ; Röthlisberger M. ; Schemm S. ; Germann U. ; Martius O.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 209 起始页码: 76
结束页码: 94
语种: 英语
英文关键词: Complex topography
; Crowd-sourcing
; Hail
; Severe weather
; Weather radar
; WRF
Scopus关键词: Meteorological radar
; Shear flow
; Storms
; Topography
; Complex topographies
; Large-scale flows
; Propagation mechanism
; Severe weather
; Thunderstorm development
; Tropospheric moisture
; Vertical Lifting
; Very high resolution
; Precipitation (meteorology)
; crowdsourcing
; evapotranspiration
; hail
; radar
; severe weather
; storm
; topography
; weather forecasting
; Switzerland
英文摘要: This paper studies a damaging hail storm that occurred on 6 June 2015 in the complex topography of Switzerland. The storm persisted for several hours and produced large hail resulting in significant damage. Storms of comparable severity occur on average only three times per year within the entire Swiss radar domain, but are rare events at this exact location, according to a set of over 400,000 automatically identified storms. A multitude of datasets, partly novel for central Europe, is now available to study the storm in great detail capturing its impacts, severity and development. The data we use include radar-based hail products, crowd-sourced hail reports, and insurance loss data. These independent datasets permitted a verification of both hail occurrence and hail size estimations by radar. The crowd-sourced reports agree well with radar-based hail observations and insurance data. Model data (ERA-Interim reanalysis, regional COSMO-2 analysis and WRF simulations) and radio-sounding data showed, that conditions were favourable for thunderstorm development due to an unstable and moist atmosphere over Switzerland, brought about by an interplay of large-scale pattern and local processes. Advection ahead of a cold front west of Switzerland and local evapotranspiration lead to high lower-tropospheric moisture. The large-scale flow and topographically induced Alpine pumping resulted in strong directional wind shear, and contributed to the longevity and severity of this storm. The cold front was not relevant for the vertical lifting. Using model simulations with very high resolution, we identified mountain wind systems and cold-air outflow as possible triggering and propagation mechanisms of this hail storm. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108863
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
There are no files associated with this item.
作者单位: Mobiliar Lab for Natural Risks, University of Bern, Bern, Switzerland; Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland; Institute of Geography, University of Bern, Bern, Switzerland; Division for Radar, Satellite and Nowcasting, MeteoSwiss, Locarno Monti, Switzerland; Division for Analysis and Forecasting, MeteoSwiss, Zurich Airport, Switzerland; Environmental Remote Sensing Laboratory, EPFL, Lausanne, Switzerland; Geophysical Instituteand Bjerknes Centre for Climate Research, University of Bergen, Bergen, Norway; Bjerknes Centre for Climate Research, University of Bergen, Bergen, Norway
Recommended Citation:
Trefalt S.,Martynov A.,Barras H.,et al. A severe hail storm in complex topography in Switzerland - Observations and processes[J]. Atmospheric Research,2018-01-01,209