Upside-down "rivers" of warm ocean water may be one of the causes of Antarctica's ice shelves breaking up, leading to a rise in sea levels. A new study suggests that, in the past, increases in Antarctic sea ice in colder climates may have contributed to ice ages. Using computer simulations, the research looked at past changes during the glacial periods and noted that previous increases in sea ice levels may have significantly altered the circulation of the ocean, which led to a reverse greenhouse effect as carbon dioxide levels in the ocean increased and levels in the air decreased. It likely stems from an asteroid impact that "rocked the Northern Hemisphere" and led to the Younger Dryas climate event. CLICK HERE TO GET THE FOX NEWS APPCorrection: A previous version of the story said the study had implications for future events.

Source: Fox News October 30, 2019 12:47 UTC