Different long-term trends of extra-tropical cyclones and windstorms in ERA-20C and NOAA-20CR reanalyses

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NOAA 20th century and ERA-20C reanalysis datasets are evaluated regarding the representation of extra-tropical cyclones and windstorms over the Northern and Southern Hemisphere during the respective 6-month winter seasons. The results indicate substantial differences in low-frequency variability between the two datasets – especially in the first half of the 20th century – expressed in different signs and/or magnitudes of long-term trends. This is hampering a reliable analysis of real long-term trends of cyclone and windstorm activity. However, higher-frequency variability is in good agreement between both datasets especially for the Northern Hemisphere.


Original languageEnglish
Pages (from-to)586-595
JournalAtmospheric Science Letters
Issue number11
Early online date14 Oct 2016
Publication statusPublished - Nov 2016


  • windstorm events, reanalysis data, extra-tropical cyclones