A strengthening of the Pacific Walker circulation (PWC) over recent decades triggered an
intense debate on the validity of model-projected weakening of the PWC in response to
anthropogenic warming. However, limitations of in situ observations and reanalysis datasets
have hindered an unambiguous attribution of PWC changes to either natural or
anthropogenic causes. Here, by conducting a comprehensive analysis based on multiple
independent observational records, including satellite observations along with a large …