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Water Vapour Feedback

28 Nov 2004 by rasmus

Translations: (Français)

Water vapour act as a powerful greenhouse gas absorbing long-wave radiation. If the atmospheric water vapour concentration increases as a result of a global warming, then it is expected that it will enhance the greenhouse effect further. It is well known that the rate of evaporation is affected by the temperature and that higher temperatures increase the (saturated) vapour pressure (the Clausius-Clapeyron equation). This process is known as the water vapour feedback. One important difference between water vapour and other greenhouse gases such as CO2 is that the moisture spends only a short time in the atmosphere before being precipitated out, whereas the life time of CO2 in the atmosphere may be longer than 100 years.

Filed Under: Glossary

Rutherford et al 2005 highlights

22 Nov 2004 by mike

The claims of McIntyre and McKitrick regarding the Mann et al (1998) temperature reconstruction have recently been discredited by the following peer-reviewed article to appear in the American Meteorological Society journal, “Journal of Climate“:

Rutherford, S., Mann, M.E., Osborn, T.J., Bradley, R.S., Briffa, K.R., Hughes, M.K., Jones, P.D., Proxy-based Northern Hemisphere Surface Temperature Reconstructions: Sensitivity to Methodology, Predictor Network, Target Season and Target Domain, Journal of Climate, in press (2005).

Key excerpts from the article are provided below: [Read more…] about Rutherford et al 2005 highlights

Filed Under: Supplemental data

PCA details

22 Nov 2004 by mike

PCA of the 70 North American ITRDB Tree-ring Proxy Series used by Mann et al (1998)

[Read more…] about PCA details

Filed Under: Supplemental data

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