2012 is the hottest year ever.

In the history of record keeping, so far 2012 is the hottest year in U.S. history. Spring was 5.2° warmer than the 20th century average, and fully 2° warmer than the prior record, in 1910. (That’s a huge difference. We’re not talking about tenths of a degree here.) Even more alarming is the resulting increase …

Links for November 25th

BBC News: CO2 climate sensitivity ‘overestimated’Of all that is very clearly known about global climate change, the one connection that is not well understood is the quantity of climate forcing that results from each unit of CO2. That is, exactly how much additional heat can the atmosphere store for each each ton of CO2 that …