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

Daniel Befort, Simon Wild, Tim Kruschke, Uwe Ulbrich, Gregor Leckebusch

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Abstract

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
Volume17
Issue number11
Early online date14 Oct 2016
DOIs
Publication statusPublished - Nov 2016

Keywords

  • windstorm events
  • reanalysis data
  • extra-tropical cyclones

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