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Identifying Northern Hemisphere Stratospheric and Surface Temperature Responses to the Mt. Pinatubo Eruption within E3SMv2-SPA


Abstract The Mt. Pinatubo eruption on 15 June 1991 is associated with stratospheric warming and tropospheric cooling. Employing E3SMv2 with prognostic aerosol modifications, we generated an ensemble of simulations initialized on 1 June 1991 to limit the intra-ensemble variability at the time of the eruption and a more traditional ensemble representing the full range of intra-ensemble variability. For each ensemble member we generated a paired counterfactual simulation with the Pinatubo forcing removed allowing for isolation of the Pinatubo impact. In general, the limited variability ensemble has greater coherence in the Pinatubo impact across ensemble members which leads to more statistically robust signals compared to the full variability ensemble. Stratospheric warming patterns from Pinatubo were approximately zonally symmetric and confined between 30°Sand 50°N. Isolating localized surface temperature impacts was more difficult, but the limited variability simulation did identify a preferential region of cooling between 20°S to 50°N.
Authors Thomas Ehrmann , Benjamin Wagman ORCID , Diana Bull ORCID , B. R. Hillman ORCID , Joseph Hollowed ORCID , Hunter Brown University of WyomingORCID , Kara Peterson ORCID , Laura Swiler ORCID , Jerry Watkins ORCID , Joseph Hart ORCID
Journal Info |
Publication Date 9/26/2024
ISSN
TypeKeyword Image report
Open Access closed Closed Access
DOI https://doi.org/10.2172/2462901
KeywordsKeyword Image Vulcanian eruption (Score: 0.49350035)