Pentagon on climate change
A couple of links today about a report that’s been obtained from the Pentagon detailing some possible effects of an abrupt climate change in the near future. Here’s what seems to be the original piece, from Fortune magazine, and here’s another, from the Guardian.
It’s interesting on a number of levels - political, scientific, and even on a philosophy of science level.
The political level is straightforward - the Bush administration in the US has been basically trying to deny that there’s any possibility that the climate may change, and the Australian government has been, as usual, following along.
The scientific level is particularly interesting. Most discussions about climate change center around the production of carbon dioxide etc, and their contribution to global warming. The problem is that the warming is only ever going to be the start of the process. As the report says, it’s likely that global warming, rather than just passively increasing the temperature overall, will flip the state of global atmospheric weather patterns, leading to greater instability in general.
The issue that I have with all of this is that everyone seems to be ignoring the other cause of global warming - the production of excess heat. My argument goes like this: The Earth has a total radiative heat capacity like any body of matter. If the total amount of change in internal heat is less than its radiative capacity, then the temperature won’t change. Simply, if you’re not creating more heat than the atmosphere can get rid of, you don’t need to worry about climate change in the long term.
So there are therefore two factors in global warming/climate change - the total radiative capacity of the earth, and the amount of heat being produced. I think that people overestimate the importance of the former and underestimate the importance of the latter.
A lot of the stuff I’ve thought about this comes from some ideas in Peter F Hamilton’s Night’s Dawn trilogy of sci-fi novels, where the earth is basically uninhabitable except in huge protected arcologies because of giant storms caused by global warming.
Something to think about for your Monday morning.