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Australia s severe 2019-20 wildfires acted like a volcanic eruption, slightly cooling the globe

These smoke plumes did something else scientists weren t expecting. Findings published recently in Communications Earth & Environment and presented at the virtual American Geophysical Union (AGU) conference this week show that smoke acted like a planetary shade, reducing the amount of sunlight hitting Earth s surface for several months. David Peterson, a meteorologist at the US Naval Research Laboratory who presented separate findings at AGU detailing the smoke s persistence in the stratosphere, says the Australian event marks the second volcanic scale pyroCb outbreak documented in records going back about 20 years. The first, a large wildfire thundercloud that formed over a blaze in British Columbia, occurred in 2017.

Australia s Black Summer bushfires acted like a volcanic eruption, slightly cooling the globe

Australia s Black Summer bushfires acted like a volcanic eruption, slightly cooling the globe We’re sorry, this service is currently unavailable. Please try again later. Dismiss Australia s Black Summer bushfires acted like a volcanic eruption, slightly cooling the globe By Maddie Stone Normal text size Advertisement Australia s disastrous 2019-2020 Black Summer bushfire season blew so much smoke into the upper atmosphere that it blocked sunlight from reaching Earth s surface, potentially causing a brief global cooling effect comparable to a moderate volcanic eruption, new research has found. In late 2019 and early 2020, raging bushfires in south-east Australia spawned a rash of rare fire-induced thunderclouds, known as pyrocumulonimbus clouds, or pyroCbs. This pyroCb super outbreak , as scientists are now calling it, injected plumes of smoke into the stratosphere, a layer of the atmosphere that starts about nine miles overhead. There, the smoke plumes spun up their own

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