macdoc
Philosopher
Good - irked me to no end to see a known climate troll authorong the previous thread....even if it was luck of the draw
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This was from 1981 and undershot the actual gain..
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This was from 1981 and undershot the actual gain..
Evaluating a 1981 temperature projection
Filed under: Climate modelling Climate Science Greenhouse gases Instrumental Record — group @ 2 April 2012
Guest commentary from Geert Jan van Oldenborgh and Rein Haarsma, KNMI
Sometimes it helps to take a step back from the everyday pressures of research (falling ill helps). It was in this way we stumbled across Hansen et al (1981) (pdf). In 1981 the first author of this post was in his first year at university and the other just entered the KNMI after finishing his masters. Global warming was not yet an issue at the KNMI where the focus was much more on climate variability, which explains why the article of Hansen et al. was unnoticed at that time by the second author. It turns out to be a very interesting read.
They got 10 pages in Science, which is a lot, but in it they cover radiation balance, 1D and 3D modelling, climate sensitivity, the main feedbacks (water vapour, lapse rate, clouds, ice- and vegetation albedo); solar and volcanic forcing; the uncertainties of aerosol forcings; and ocean heat uptake. Obviously climate science was a mature field even then: the concepts and conclusions have not changed all that much. Hansen et al clearly indicate what was well known (all of which still stands today) and what was uncertain.
- See more at: http://www.realclimate.org/index.ph...-temperature-projection/#sthash.pyd1ya4U.dpuf
