Abstract

The supereruption of Los Chocoyos (14.6 degrees N, 91.2 degrees W) in Guatemala similar to 84 kyr ago was one of the largest volcanic events of the past 100 000 years. Recent petrologic data show that the eruption released very large amounts of climate-relevant sulfur and ozone-destroying chlorin... Show moreThe supereruption of Los Chocoyos (14.6 degrees N, 91.2 degrees W) in Guatemala similar to 84 kyr ago was one of the largest volcanic events of the past 100 000 years. Recent petrologic data show that the eruption released very large amounts of climate-relevant sulfur and ozone-destroying chlorine and bromine gases (523 +/- 94 Mt sulfur, 1200 +/- 156 Mt chlorine, and 2 +/- 0.46 Mt bromine) Using the Earth system model (ESM) of the Community Earth System Model version 2 (CESM2) coupled with the Whole Atmosphere Community Climate Model version 6 (WACCM6), we simulated the impacts of the sulfur- and halogen-rich Los Chocoyos eruption on the preindustrial Earth system. Show less