How relevant are frequency changes of weather regimes for understanding climate change signals in surface precipitation in the North Atlantic–European sector? A conceptual analysis with CESM1 large ensemble simulations
Luise J. Fischer,David N. Bresch,Dominik Büeler,Christian M. Grams,Robin Noyelle,Matthias Röthlisberger,and Heini Wernli
Luise J. Fischer
Institute for Atmospheric and Climate Science, ETH Zürich, Zurich, Switzerland
Institute for Environmental Decisions, ETH Zürich, Zurich, Switzerland
Atmospheric flows over the North Atlantic can be meaningfully classified into weather regimes, and climate simulations suggest that the regime frequencies might change in the future. We provide a quantitative framework that helps assess whether these regime frequency changes are relevant to understanding climate change signals in precipitation. At least in our example application, in most regions, regime frequency changes explain little of the projected precipitation changes.
Atmospheric flows over the North Atlantic can be meaningfully classified into weather regimes,...