Massive volcanic carbon dioxide (CO2) emissions contributing to an extreme global ocean deoxygenation event over 120 million years ago has modern day implications for understanding a climate warming “tipping point,” according to new research published in Nature, led by a scientist at Ocean Networks Canada, a University of Victoria initiative. Massive volcanic carbon dioxide (CO2) emissions contributing to an extreme global ocean deoxygenation event over 120 million years ago has modern day implications for understanding a climate warming “tipping point,” according to new research published in Nature, led by a scientist at Ocean Networks Canada, a University of Victoria initiative. Earth Sciences Environment Phys.org – latest science and technology news stories