edu.ucar.opensky::articles:24256 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T06:32:25.221068 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7kh0rq3 https://doi.org/10.5281/zenodo.4028819 https Related Software #1 hansbrenna/LCY_QBO_figures_code: First release. Without data link Decadal disruption of the QBO by tropical volcanic supereruptions 2021-03-16T00:00:00Z publication https://n2t.org/ark:/85065/d7kh0rq3 https://doi.org/10.1029/2020GL089687 Brenna, H. author Kutterolf, S. author Mills, Michael J. author Niemeier, U. author Timmreck, C. author Krüger, K. author UCAR/NCAR - Library publisher The Los Chocoyos (14.6 degrees N, 91.2 degrees W) supereruption happened similar to 75,000 years ago in Guatemala and was one of the largest eruptions of the past 100,000 years. It emitted enormous amounts of sulfur, chlorine, and bromine, with multi-decadal consequences for the global climate and environment. Here, we simulate the impact of a Los Chocoyos-like eruption on the quasi-biennial oscillation (QBO), an oscillation of zonal winds in the tropical stratosphere, with a comprehensive aerosol chemistry Earth System Model. We find a similar to 10-year disruption of the QBO starting 4 months post eruption, with anomalous easterly winds lasting similar to 5 years, followed by westerlies, before returning to QBO conditions with a slightly prolonged periodicity. Volcanic aerosol heating and ozone depletion cooling leads to the QBO disruption and anomalous wind regimes through radiative changes and wave-mean flow interactions. Different model ensembles, volcanic forcing scenarios and results of a second model back up the robustness of our results. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation