Co-chief Joanna Morgan, co-author of the article, was carrying a core retrieved from the crater of Chicxulub during IODP Expedition 364 – photo M. Mowat, ECORD/IODP

AGU press release – 31 October 2017
Dinosaur-killing asteroid impact may have cooled Earth’s climate more than previously thought

“The Chicxulub asteroid impact likely released far more climate-altering sulfur gas into the atmosphere than originally thought, according to new research.”
A new study1 makes a more refined estimate of how much sulfur and carbon dioxide gas were ejected into Earth’s atmosphere from vaporized rocks immediately after the Chicxulub event. The study’s authors estimate more than three times as much sulfur may have entered the air compared to what previous models assumed, implying the ensuing period of cool weather may have been colder than previously thought.”

Further reading:
AGU contact: Lauren Lipuma –

1 Artemieva N, Morgan J and Expedition 364 Science Party (2017). Quantifying the Release of Climate-Active Gases by Large Meteorite Impacts With a Case Study of Chicxulub. Geophysical Research Letters, 44.