The tiny black particles released into the atmosphere by burning fuels are far more powerful agents of global warming than had previously been estimated, some of the world’s most prominent atmospheric scientists reported in a study issued on Tuesday.
These particles, which are known as black carbon and are the major component of soot, are the second most important contributor to global warming, behind only carbon dioxide, wrote the 31 authors of the study, published online by The Journal of Geophysical Research-Atmospheres.
The new estimate of black carbon’s heat-trapping power is about double the one made in the last major report by the United Nations’ Intergovernmental Panel on Climate Change, in 2007. And the researchers said that if indirect warming effects of the particles are factored in, they may be trapping heat at almost three times the previously estimated rate.
Is Earth F**Ked: At 2012 AGU Meeting, Scientists Consider Advocacy, Activism, Politics, and Getting Arrested.
Many of us have wondered at some point in almost precisely these terms: “Is Earth F**ked?” But it’s not the sort of frank query you expect an expert in geomorphology to pose to his colleagues as the title of a formal presentation at one of the world’s largest scientific gatherings.
Nestled among offerings such as “Bedrock Hillslopes to Deltas: New Insights Into Landscape Mechanics” and “Chemical Indicators of Pathways in the Water Cycle,” the question leapt off the pages of the schedule for the American Geophysical Union’s fall meeting. Brad Werner, a geophysicist at the University of California, San Diego, is one of the more than 20,000 Earth and atmospheric scientists who descended on downtown San Francisco this week to share their research on everything from Antarctic ice-sheet behavior to hurricane path modeling to earthquake forecasting. But he’s the only one whose presentation required the use of censorious asterisks. When the chairman of Werner’s panel announced the talk’s title on Wednesday, a titter ran through the audience at the naughtiness of it all.
Why shout out the blunt question on everyone’s mind? Werner explained at the outset of the presentation that it was inspired by friends who are depressed about the future of the planet. “Not so much depressed about all the good science that’s being done all over the world—a lot of it being presented here—about what the future holds,” he clarified, “but by the seeming inability to respond appropriately to it.”