Despite decades of research, relationships between clouds, aerosols and precipitation are poorly understood, concludes a review article in Nature today. Read more
If we are trying to keep global warming to 2 degrees Celsius or less but 4 degrees is possible even within some of our lifetimes, which world do we prepare for? Talks at today’s session on adaptation took on the problem of the multiple futures that decision-makers have to face. Mark Stafford-Smith of CSIRO in Australia talked specifically about long-term decisions – such as planting and managing forests – where the best option depends on which way the climate goes later this century. If you expect strong mitigation that holds down warming, then you try to preserve today’s forests and nurse them through, protecting them from fire and other threats. Read more
Immersing yourself in the impacts of extreme climate change can give rise to a certain amount of gallows humor. Conversation among my dinner companions last night turned to whether this week’s 4 Degrees and Beyond conference or March’s Copenhagen Climate Congress provided “more apocalypse for your conference fee”. The far more serious question, of course, is how much upheaval and human suffering would come with the substantial warming that delegates here are contemplating. Some interesting talks today looked at the facets of sea level rise and population displacement. Read more
Unless major breakthroughs in policy, industry and individual behavior turn around our emissions trajectory pronto, this century could well see average global temperatures 4 degrees Celsius or more above their pre-industrial baseline. That’s the starting point for the 4 Degrees and Beyond conference in Oxford this week. Here, 130 scientists and policy experts are taking a detailed look at a world warmed by twice the amount that’s usually considered dangerous. Read more
A newly launched series of Google Earth tours will map out the projected impacts of climate change worldwide and look at mitigation and adaptation options. Here’s a brief intro, narrated in the light Tennessee drawl of Al Gore: … Read more
After a banner week of international summits, a great leap forward on climate policy has yet to materialize, and some players are expressing a growing frustration. Read more
Considered by some a silver bullet and by others a hopeless dream, the idea that we can simply capture our carbon dioxide emissions and store them safely away is nothing if not compelling. After all, it lends an air of practicality to the notion that human ingenuity can somehow continue the unabated use of fossil fuels over the coming decades without dangerously warming the climate. Read more
Many glaciers in Greenland and Antarctica are speeding up their slide into the sea. But this type of ice loss – known as dynamic thinning – is so ill-understood and difficult to predict that the IPCC, in their 2007 assessment report, threw up their hands and refused to guess how much it would contribute to future sea level rise. Read more
Despite the apparent stress that humanity is causing to the Earth system, defining sustainable limits for our own existence has proved to be something of an intractable problem. But what if we could define global sustainability numerically? Read more
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Climate Feedback is a blog hosted by Nature Publishing Group to facilitate lively and informative discussion on the science and wider implications of global warming. The blog aims to be a forum for debate and commentary on climate science in the Nature Climate Change journal and in the world at large.
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