Red Flags Rise on Global Warming and the Seas

Former Obama science adviser says somber intergrovernmental panel report may understate the urgency

The Intergovernmental Panel on Climate Change (IPCC) released a special report last week warning of the mounting effects of global warming on the seas, increasing temperatures and acidification, and on the world's melting ice. It noted the potential dangers from sea level rise, water shortages in glacier-fed rivers, declining and shifting fish stocks, and increased frequency and severity of storms, among many other hazards. The release came during a week marked by climate-related activities, from youth protests around the world to a United Nations summit meeting of global leaders to consider the issue.

The Gazette spoke with John Holdren, the Teresa and John Heinz Professor of Environmental Policy at the Harvard Kennedy School, of environmental science and policy in the Department of Earth and Planetary Sciences, and affiliated professor in the John A. Paulson School of Engineering and Applied Science. Holdren was director of the White House Office of Science and Technology Policy during the Obama administration and now co-leads the Arctic Initiative at HKS' Belfer Center for Science and International Affairs.

Surprisingly, while the situation seems urgent, Holdren suggested there may be something positive lurking under the gloom.

Q&A

John Holdren

GAZETTE: These IPCC reports on climate seem to be getting more and more dire. Is there any good news in this latest report, the "Special Report on the Ocean and Cryosphere"?

HOLDREN: I don't think there's any good news in the report because it's focused only on the science, and it's been true for decades now that virtually all of the new news from climate science has been bad news. The current good news is on the public awareness side. It's that the fraction of the American public and of publics around the world who understand that climate change is real, caused by humans, already doing significant damage, and that we need to act, has been going up. I actually think we could be close to a political tipping point, because of the combination of expanded grassroots conviction that more needs to be done and these authoritative reports underscoring how pervasive the impacts of climate change already are, even though we’re just at about 1 degree Celsius above the preindustrial temperature....