Do Atlantic-European Weather Regimes Physically Exist?

Assaf Hochman*, Gabriele Messori, Julian F. Quinting, Joaquim G. Pinto, Christian M. Grams

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

The subseasonal variability of the extratropical large-scale atmospheric flow is characterized by recurrent or quasi-stationary circulation anomalies, termed weather regimes. Despite the usefulness of these regimes in numerous meteorological and socioeconomic applications, there is an ongoing debate as to whether they represent physical modes of the atmosphere, or are merely useful statistical categorizations. Here, we answer this question for wintertime Atlantic-European regimes. We argue that dynamical systems theory applied to a refined regime definition provides strong evidence in support of most weather regimes being physically meaningful. This finding underpins the broad relevance of weather regimes, for understanding the response of the atmosphere to external forcing, supporting subseasonal weather forecasting, and down scaling of climate projections.

Original languageAmerican English
Article numbere2021GL095574
JournalGeophysical Research Letters
Volume48
Issue number20
DOIs
StatePublished - 28 Oct 2021

Bibliographical note

Publisher Copyright:
© 2021. The Authors.

Keywords

  • Euro-Atlantic
  • Europe
  • climate dynamics
  • extratropical weather regimes
  • subseasonal variability

Fingerprint

Dive into the research topics of 'Do Atlantic-European Weather Regimes Physically Exist?'. Together they form a unique fingerprint.

Cite this