Increased projected changes in quasi-resonant amplification and persistent summer weather extremes in the latest multimodel climate projections.

ABSTRACT: High-amplitude quasi-stationary atmospheric Rossby waves with zonal wave numbers 6-8 associated with the phenomenon of quasi-resonant amplification (QRA) have been linked to persistent summer extreme weather events in the Northern Hemisphere. QRA is not well-resolved in current generation climate models, therefore, necessitating an alternative approach to assessing their behavior. Using a previously-developed fingerprint-based semi-empirical approach, we project future occurrence of QRA events based on a QRA index derived from the zonally averaged surface temperature field, comparing results from CMIP 5 and 6 (Coupled Model Intercomparison Project). There is a general agreement among models, with most simulations projecting substantial increase in QRA index. Larger increases are found amon

SUBMITTER: Guimaraes SO 

PROVIDER: S-EPMC11420229 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature