The above graph by Ian Hill.
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| http://geocraft.com/WVFossils/Carboniferous_climate.html |
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| Graph: David Archibald |
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| Reconstruction of pH levels for the South China Seas by Liu et al (2009) Source: Tim Ball |
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Very interesting data from the NOAA NCEEP/NCAR R1 database (1948 to 2008). It shows that the net greenhouse effect has remained virtually constant as CO2 has gone up and H2O has gone down. How could that be? The water vapor cycle is already saturated, and adding a little CO2 (which has similar GH properties to H2O) merely causes the atmosphere to shed a little net water vapor. Another way to look at this is to note the absence of 'water vapor catastrophes.' If our climate were so unstable as to be easily pushed over the edge by a hundred ppmv of additional GH gas (out of perhaps 20,000 ppmv total) then we would have been doomed long ago.
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The ‘relationship’ between CO2 and temperature this century
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Comparing Climate Models versus Real Data:
A comparison of 44 climate models versus the UAH and RSS satellite observations for global lower tropospheric temperature variations, for the period 1979-2012 from the satellites, and for 1975 – 2025 for the models.Source Roy Spencer (Link) and KNMI Climate Explorer (Link) + + + + + + + + + + |
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