The heatwaves in Switzerland in summer 1947

Grütter, Jenny; Lehmann, Stephanie Sarah; Auchmann, Renate; Martius, Olivia; Brönnimann, Stefan (2013). The heatwaves in Switzerland in summer 1947. In: Brönnimann, Stefan; Martius, Olivia (eds.) Weather extremes during the past 140 years. Grundlagenforschung: Vol. G89 (pp. 69-80). Bern: Geographica Bernensia 10.4480/GB2013.G89.08

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In 1947, Switzerland was affected by a heat period of large spatial and temporal extent and rare occurrence. The heatwaves of 1947 can be compared with the events of 2003 in terms of intensity and duration. The summer of 1947 is studied based on the analysis of MeteoSwiss station data as well as the “Twentieth Century Reanalysis” (20CR) data set. Heatwaves were defined as six consecutive exceedances of the local 90th percentile of temperature. Five different heatwaves were identified which struck Switzerland during the summer of 1947. The most intense heatwave event is analysed in more detail. The meteorological situation was characterized by a high-pressure bridge over Central Europe. Based on a comparison with literature and with observations, the applicability of the 20CR dataset for the meteorological analysis of heatwave events could be demonstrated. The representation of the heat period in summer 1947 in 20CR is satisfactory when compared with station data, albeit with a temperature bias due to differences in topography. Hence, heatwaves cannot be defined using an absolute threshold. We conclude that 20CR is applicable for an overview of the meteorological patterns characterizing a heat wave but may not reproduce local details.

Item Type:

Book Section (Book Chapter)

Division/Institute:

08 Faculty of Science > Institute of Geography > Physical Geography > Unit Climatology
08 Faculty of Science > Institute of Geography > Physical Geography > Unit Impact
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Institute of Geography

UniBE Contributor:

Auchmann, Renate; Romppainen-Martius, Olivia and Brönnimann, Stefan

Subjects:

500 Science > 550 Earth sciences & geology
900 History > 910 Geography & travel

Series:

Grundlagenforschung

Publisher:

Geographica Bernensia

Language:

English

Submitter:

Monika Wälti-Stampfli

Date Deposited:

05 Feb 2014 17:52

Last Modified:

25 Mar 2019 13:47

Publisher DOI:

10.4480/GB2013.G89.08

BORIS DOI:

10.7892/boris.40477

URI:

https://boris.unibe.ch/id/eprint/40477

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