The impact of volcanic eruptions on surface climate is well-appreciated, but their in situ impact on the Quasi-Biennial Oscillation (QBO) has received comparatively little attention. This study examines the QBO responses to Krakatoa and Pinatubo using five configurations of the NASA Goddard Institute for Space Studies Model E2.2 and MERRA-2 reanalysis. A dynamically consistent response is found in terms of static stability, zonal wind, and upwelling. Eruptions are found to bias the QBO towards a westerly state, such that the QBO period response depends upon the phase at the time of eruption. The QBO does not have a clear amplitude response to an eruption, based on these simulations. The underlying mechanisms appear not to be influenced to first-order by interactive composition, sea surface temperatures, or long-term trends in and ozone-depleting substances.

中文翻译：

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准两年一次的振荡对历史火山喷发的响应

火山喷发对地表气候的影响已广为人知，但它们的原位对准两年振荡（QBO）的影响相对较少受到关注。本研究使用美国宇航局戈达德空间研究所模型 E2.2 和 MERRA-2 再分析的五种配置来检查 QBO 对 Krakatoa 和 Pinatubo 的响应。在静态稳定性、纬向风和上升流方面发现了动态一致的响应。发现喷发使 QBO 偏向西风状态，因此 QBO 周期响应取决于喷发时的相位。根据这些模拟，QBO 对喷发没有明确的幅度响应。潜在机制似乎不受相互作用成分、海面温度或臭氧消耗物质的长期趋势的一级影响。