Articles | Volume 3, issue 1
Weather Clim. Dynam., 3, 231–250, 2022
https://doi.org/10.5194/wcd-3-231-2022
Weather Clim. Dynam., 3, 231–250, 2022
https://doi.org/10.5194/wcd-3-231-2022

Research article 01 Mar 2022

Research article | 01 Mar 2022

Past evolution of western Europe large-scale circulation and link to precipitation trend in the northern French Alps

Antoine Blanc et al.

Data sets

ERA5 hourly data on pressure levels from 1950 to 1978 (preliminary version) B. Bell, H. Hersbach, P. Berrisford, P. Dahlgren, A. Horányi, J. Muñoz Sabater, J. Nicolas, R. Radu, D. Schepers, A. Simmons, C. Soci, and J.-N. Thépaut https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-pressure-levels-preliminary-back-extension?tab=overview

The ERA5 global reanalysis (https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-pressure-levels?tab=overview) H. Hersbach, B. Bell, P. Berrisford, S. Hirahara, A. Horányi, J. Muñoz-Sabater, J. Nicolas, C. Peubey, R. Radu, D. Schepers, A. Simmons, C. Soci, S. Abdalla, X. Abellan, G. Balsamo, P. Bechtold, G. Biavati, J. Bidlot, M. Bonavita, G. De Chiara, P. Dahlgren, D. Dee, M. Diamantakis, R. Dragani, J. Flemming, R. Forbes, M. Fuentes, A. Geer, L. Haimberger, S. Healy, R. J. Hogan, E. Hólm, M. Janisková, S. Keeley, P. Laloyaux, P. Lopez, C. Lupu, G. Radnoti, P. de Rosnay, I. Rozum, F. Vamborg, S. Villaume, and J.-N. Thépaut https://doi.org/10.1002/qj.3803

ERA20C reanalysis ECMWF https://apps.ecmwf.int/datasets/data/era20c-daily/levtype=sfc/type=an/

20th Century Reanalysis V2c data NOAA/OAR/ESRL PSL https://psl.noaa.gov/data/gridded/data.20thC_ReanV2c.html

Model code and software

R: A Language and Environment for Statistical Computing R Core Team https://www.R-project.org

RStudio: Integrated Development Environment for R RStudio Team http://www.rstudio.com/

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Short summary
Precipitation variability and extremes in the northern French Alps are governed by the atmospheric circulation over western Europe. In this work, we study the past evolution of western Europe large-scale circulation using atmospheric descriptors. We show some discrepancies in the trends obtained from different reanalyses before 1950. After 1950, we find trends in Mediterranean circulations that appear to be linked with trends in seasonal and extreme precipitation in the northern French Alps.