caa a22 4500 605473692 CHVBK 20210128100344.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s00382-014-2404-1 doi (NATIONALLICENCE)springer-10.1007/s00382-014-2404-1 Large-scale atmospheric flow conditions and sea surface temperatures associated with hazardous winds in Switzerland [Elektronische Daten] [Christoph Welker, Olivia Martius] The link between hazardous winter winds in Switzerland and the large-scale atmospheric and sea surface temperature (SST) environment in the North Atlantic basin is examined. The analyses cover synoptic, interannual, and decadal time scales and are based on all ensemble members of the Twentieth Century Reanalysis dataset for 1871-2008. On the synoptic time scale, the top ten high wind events in Switzerland are analysed; on longer time scales, the variability of the integrated winter wind loss potential (WLP) in Switzerland is examined. The top ten high wind events were associated with an eastward extension of the extratropical jet, enhanced cyclone frequencies over the North Sea and Scandinavia and reduced cyclone frequencies over the Mediterranean. The events were further accompanied by positive SST anomalies in the East Atlantic and the Mediterranean, and positive lower-tropospheric temperature and atmospheric moisture anomalies over Western and Central Europe. On interannual and decadal time scales, the winter WLP variability was associated with a large-scale atmospheric and SST pattern resembling a southeastward displacement of the winter North Atlantic Oscillation (NAO) pattern. The correlation of the WLP with the NAO and the East Atlantic pattern was positive for most of the 1951-2008 period, and increased with time. The distinct eastward shift of the northern centre of action of the NAO at the end of the twentieth century may explain the improved correlation between the winter NAO variability and the WLP. Springer-Verlag Berlin Heidelberg, 2014 Variability of winter storms over Switzerland nationallicence Large-scale atmospheric and SST environment nationallicence NAO nationallicence Teleconnection patterns nationallicence 20CR nationallicence Objective cyclone detection nationallicence Welker Christoph Oeschger Centre for Climate Change Research and Institute of Geography, University of Bern, Hallerstrasse 12, 3012, Bern, Switzerland aut Martius Olivia Oeschger Centre for Climate Change Research and Institute of Geography, University of Bern, Hallerstrasse 12, 3012, Bern, Switzerland aut Climate Dynamics Springer Berlin Heidelberg 44/7-8(2015-04-01), 1857-1869 0930-7575 44:7-8<1857 2015 44 382 https://doi.org/10.1007/s00382-014-2404-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00382-014-2404-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Welker Christoph Oeschger Centre for Climate Change Research and Institute of Geography, University of Bern, Hallerstrasse 12, 3012, Bern, Switzerland aut NATIONALLICENCE 700 1- Martius Olivia Oeschger Centre for Climate Change Research and Institute of Geography, University of Bern, Hallerstrasse 12, 3012, Bern, Switzerland aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 44/7-8(2015-04-01), 1857-1869 0930-7575 44:7-8<1857 2015 44 382