Stronger influences of increased CO2 on subdaily precipitation extremes than at the daily scale

Wei Zhang, Gabriele Villarini, Enrico Scoccimarro, Gabriel Andres Vecchi

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12 Scopus citations

Abstract

Based on idealized experiments (preindustrial control experiment (PI) and 1% yr−1 increase (1%CO2) in atmospheric CO2) from 10 general circulation models produced under the Coupled Model Intercomparison Project Phase 5 and using the fraction of attributable risk, we examine the CO2 effects on extreme precipitation at the subdaily and daily scales. We find that the increased CO2 concentration substantially increases the odds of the occurrence of subdaily precipitation extremes compared to the daily scale in most areas of the world, with the exception of some regions in the subtropics, likely in relation to the subsidence of the Hadley Cell. These results point to the large role that atmospheric CO2 plays in extreme precipitation under an idealized framework.

Original languageEnglish (US)
Pages (from-to)7464-7471
Number of pages8
JournalGeophysical Research Letters
Volume44
Issue number14
DOIs
StatePublished - Jul 28 2017

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

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