Extreme springs in Switzerland since 1763 in climate and phenological indices

Author:

Imfeld Noemi,Hufkens Koen,Brönnimann Stefan

Abstract

Abstract. Historical sources report manifold on hazardous past climate and weather events that had considerable impacts on society. Studying changes in the occurrence or mechanisms behind such events is, however, hampered by a lack of spatially and temporally complete weather data. In particular, the spring season has received less attention in comparison to summer and winter but is nevertheless relevant, since weather conditions in spring can delay vegetation and create substantial damage due to late-frost events. For Switzerland, we created a daily high-resolution (1 × 1 km2) reconstruction of temperature and precipitation fields from 1763 to 1960 that forms, together with present-day meteorological fields, a 258-year-long gridded data set. With this data set, we study changes in long-term climate and historical weather events based on climate and phenological indices focusing on the spring season. Climate and phenological indices show few changes in the mean during the first 200 years compared to the most recent period from 1991 to 2020, where climate change signals clearly emerged in many indices. We evaluate the climate and phenological indices for three cases of extreme spring weather conditions: an unusually warm spring, two late-frost events, and three cold springs. Warm springs are much more frequent in the 21st century, but a very warm and early spring also occurred in 1862. Spring temperatures, however, do not agree on how anomalously warm the spring was when comparing the Swiss temperature reconstruction with reanalyses that extend back to 1868. The three springs of 1785, 1837, and 1853 were particularly cold, with historical sources reporting, for example, prolonged lake freezing and abundant snowfall. Whereas the springs of 1837 and 1853 were characterized by cold and wet conditions, in the spring of 1785 wet days were below average, and frost days reached an all-time maximum, in particular in the Swiss Plateau, indicating inversion conditions. Such conditions are in line with a high occurrence of northeasterly and high-pressure weather types and historical sources describing Bise conditions, a regional wind in the Alpine area related to inversions. Studying such historical events is valuable, since similar atmospheric conditions can lead to cold springs affecting vegetation growth and agricultural production.

Funder

Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

European Commission

Publisher

Copernicus GmbH

Reference89 articles.

1. Ambühl, E.: 100 Jahre Einschneien und Ausapern in Andermatt (1860/1960), Die Alpen, https://www.sac-cas.ch/index.php?eID=dumpFile&t=f&f=133729&token=e932334ef1e45fb867c0f664f81416f77eea1429, (last access: 20 June 2023), 1961. a

2. Appenzeller-Kalender: Appenzeller Kalender: Von der Witterung und Fruchtbarkeit vom Herbst 1872–1873, https://doi.org/10.5169/seals-373580, 1874. a

3. Auchmann, R., Brugnara, Y., Rutishauser, T., Brönnimann, S., Gehrig, R., Pietragalla, B., Begert, M., Sigg, C., Knechtl, V., Calpini, B., and Konzelmann, T.: Quality Analysis and Classification of Data Series from the Swiss Phenology Network, Technical Report Meteoswiss, 271, 77 pp., https://www.meteoschweiz.admin.ch/dam/jcr:5220f36c-435d-4d46-b766-ba91b0dffe37/fachbericht-271.pdf, (last access: 20 June 2023), 2018. a, b, c

4. Basler, D.: Evaluating phenological models for the prediction of leaf-out dates in six temperate tree species across central Europe, Agr. Forest Meteor., 217, 10–21, https://doi.org/10.1016/j.agrformet.2015.11.007, 2016. a

5. Begert, M., Stöckli, R., and Croci-Maspoli, M.: Klimaentwicklung in der Schweiz – vorindustrielle Referenzperiode und Veränderung seit 1864 auf Basis der Temperaturmessung, Technical Report Meteoswiss, 274, 23 pp., https://www.meteoswiss.admin.ch/dam/jcr:4c89a839-d577-47f1-aeb9-a30749ddaf2b/AB_Vorind_Refp_v1.1_de.pdf (last access: 30 June 2023), 2019. a

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