Speaker
Description
Hunga, a submarine volcano in the South Pacific, reached an eruption climax on 15 January 2022. This eruption not only led to the largest perturbation in the stratospheric aerosol loading in the last 30 years but also injected around 150 Tg of water directly into the stratosphere, increasing the stratospheric water vapor mass by ∼10% instantaneously. The Hunga eruption has impacted stratospheric chemistry, and the stratospheric and mesospheric temperature and circulation. In this presentation, we use MLS data to investigate the 2.5-year evolution of the water vapor plume, examine the dehydration in 2023 caused by polar stratospheric clouds, and discuss potential future scenarios for the stratospheric water vapor burden. The Hunga eruption significantly altered the middle-atmosphere, leaving it in an unprecedented anomalous state.
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