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The Greenhouse Effect
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26 Articles

Trends in Tropospheric Humidity from NCEP Reanalysis Data

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This paper examines the radiosonde (weather balloon) data from the National Centers for Environmental Prediction (NCEP) reanalysis on tropospheric humidity. It shows that the 35-year trends in specific humidity at all altitudes above the 850 hPa level are significantly negative, implying that the long-term water vapor feedback is negative, contrary to the assumption used for climate models.



Water Vapor Decline Cools the Earth: NASA Satellite Data

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An analysis of NASA satellite data show that water vapor, the most important greenhouse gas, has declined in the upper atmosphere causing a cooling effect that is 16 times greater than the warming effect from man-made greenhouse gas emission during the period 1990 to 2001. Radiosonde data also shows declining upper atmosphere humidity. Both satellite data and radiosonde data confirms no tropical upper atmosphere temperature amplification, contrary to IPCC theory. Four independent data sets prove the IPCC theory wrong. CO2 does not cause significant global warming.



English Translation: The Presumed Cause of Climate Fluctuations - Svante Arrhenius, 1906

The Friends of Science Society has translated the 1906 paper by Svante Arrhenius from the original German to English. In this paper, Arrhenius revised downward his previously estimated effect of doubling CO2 (including water vapour feedback) from 5 deg. C to 3.9 deg. C, By comparison, the climate model mean estimate is 3.2 deg. C. Arrhenius also estimated the direct effect of doubling CO2 (without a change of water vapour) at 2.1 deg. C. The corresponding climate model mean estimate is 1.16 deg. C. Arrhenius also concludes that changes to CO2 can't explain the ice ages.



Evidence for Negative Water Feedback

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Positive linear climate feedback for combined water effects is shown to be incompatible with the Faint Sun Paradox. Earth like planets with large liquid water surfaces can self-regulate temperature for small changes in incident solar radiation. Direct evidence for negative water feedback is found in CRUTEM4 station data by comparing temperature anomalies for arid regions (deserts and polar regions) with those for humid regions (mainly saturated tropics).



The Skeptic's Case

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Dr. David Evans presents the skeptics case. Government funded climate scientists claim that water vapour amplifies the direct warming effect of carbon dioxide three-fold, but independent climate skeptics say that empirical evidence shows that clouds and water vapour cut the direct warming effect in half.




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