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Climate modelling

Michaels misquotes Hansen

2 Dec 2004 by Gavin

Pat Michaels (under the guise of the Greening Earth society) is particularly fond of misquoting Jim Hansen, director of the NASA GISS laboratory (and in the interests of full disclosure, GS’s boss).

Recently he claimed that Dr. Hansen has now come around to the ‘skeptics’ (i.e. Pat Michaels) way of thinking and suggests that they agree on the (small) amount of warming to be expected in the future. Michaels quotes Hansen from a 2001 PNAS paper:

[Read more…] about Michaels misquotes Hansen

Filed Under: Climate modelling, Greenhouse gases

Climate model scenarios

1 Dec 2004 by Gavin

Translations: (Français)

A couple of commentators (Pat Michaels, Roy Spencer) recently raised an issue about the standard scenarios used to compare climate models, in this case related to a study on the potential increase in hurricane activity.

The biggest uncertainty in what will happen to climate in the future (say 30 years or more) is the course that the global economy will take and the changes in technology that may accompany that. Since climate scientists certainly don’t have a crystal ball, we generally take a range of scenarios or projections of future emissions of CO2 and other important forcings such as methane and aerosols.

[Read more…] about Climate model scenarios

Filed Under: Climate modelling, Climate Science, Greenhouse gases, IPCC

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