The unprecedented amount of water vapor hurled into the atmosphere, as detected by NASA’s Microwave Limb Sounder, could end up warming Earth’s surface temporarily. On January 15, 2022, the Hunga Tonga-Hunga Ha’apai volcano erupted, setting off a sonic boom that circled the globe twice and unleash
in Chile – sent appreciable amounts of water vapor to such high altitudes. But those were mere blips compared to the Tonga event, and the water vapor from both previous eruptions dissipated quickly. The excess water vapor injected by the Tonga volcano, on the other hand, could remain in the stratosphere for several years.
This extra water vapor could influence atmospheric chemistry, boosting certain chemical reactions that could temporarily worsen the depletion of the ozone layer. It could also influence surface temperatures. Massive volcanic eruptions like Krakatoa and Mount Pinatubo typically cool Earth’s surface by ejecting gases, dust, and ash that reflect sunlight back into space.
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