The long-term harms from climate change over the next decades may undermine support for efforts to reduce emissions
Almost two straight months of wildfires and smoke in California are a tangible sign of the impacts of climate change on our lives and our world. This article from the New York Times a couple of weeks ago does a good job of laying out why the wildfires in California are only one example of …CONTINUE READING
Could mega-adaptation projects in Antarctica slow the rise of global sea levels?
As the planet warms over the coming centuries, glacial melt in Greenland and Antarctica will lead to significant sea level rise. This phenomenon threatens to flood coastal cities, submerge island nations, and displace hundreds of millions of people. Coastal adaptation projects underway give us a glimpse into how we will respond to this future. Some …CONTINUE READING
We need to address the procedures and structures for climate policymaking.
There’s a lot of discussion about the substance of climate policy today. That’s obviously critical, but we also need to think about the procedural and institutional issues involved in making climate policy. For instance, we need to think about how to divide authority between the states and the federal government. I thought it would be …CONTINUE READING
We’re making progress on addressing climate change, and I’m hopeful that we’ll continue doing so. Yet it’s not clear whether the path we’re currently on will make progress fast enough to avoid very serious risks. So what would it take for us to make a quantum leap in this effort? I wouldn’t hazard a prediction …CONTINUE READING
Did the IPCC bury the lede regarding solar geoengineering?
In my previous posts on the reports of the Intergovernmental Panel on Climate Change (IPCC), I described how models assume the use of uncertain negative emissions technologies at very large — if not impossible — scales in order to keep global warming within 1.5 or two degrees Celsius (1, 2; see also my colleague Julia …CONTINUE READING
If we’re serious keeping warming “well below 2°C, geoengineering may be necessary.
The Paris establishes an aspiration goal of holding climate change to 1.5°C, with a firmer goal of holding the global temperature decrease “well below” 2°C. As a practical matter, the 1.5°C goal almost certainly would require geoengineering, such as injecting aerosols into the stratosphere or solar mirrors. Even getting well below 2°C is likely to …CONTINUE READING
An NAS report on controversial engineered responses to climate change gets all the big things right, but avoids the hardest questions
Earlier this week, the National Research Council Committee on Geoengineering Climate released two reports, “Climate Intervention: Carbon Dioxide Removal and Reliable Sequestration” and “Climate Intervention: Reflecting Sunlight to Cool Earth.” Requested and funded by several US federal departments – NASA, NOAA, DOE, and the cutely labeled “U.S. Intelligence Community” – this report is the first …CONTINUE READING
There’s been a lot of attention paid to a geoengineering “experiment” conducted recently in the North Pacific. A team distributed iron into the ocean: This is a form of geoengineering because, in many parts of oceans around the world, iron is the main nutrient that limits the growth and productivity of phytoplankton. If you add more iron in …CONTINUE READING
The scientific journal Nature reports on two recent research findings. One is bad news. I think the other is good news, but not everyone will agree. The first report (the bad news) is a reminder that ecological harm is a cumulative process: The [new] study suggests that the cold weather was the first of three …CONTINUE READING
Is it unethical for scientists studying techniques to geoengineer the earth’s climate to advocate for additional government funding to expand the study of the science and geopolitics of the topic? That’s the conclusion of a recent Guardian article that criticizes Harvard’s David Keith and the Carnegie Institute’s Ken Caldeira for a) receiving outside money to …CONTINUE READING