There is growing evidence that rising carbon dioxide levels lead to insignificant warming. [emphasis, links added]
In a new study, seven Viennese Researchers provide more evidence that carbon dioxide absorption band is saturated at today's concentrations (over 400 ppm).
Therefore, rising CO2 concentrations will not cause severe global warming:
“Data from ground-based measurements indicate that downward (backwards) radiation from the atmosphere does show complete saturation of the infrared CO2 band and does not support significant additional thermal forcing (TF) by increasing CO2 in the lower atmosphere.”
“…We can expect complete saturation at current concentrations.”
As shown in Table 2 of the study, Carbon dioxide emissions have doubled from pre-industrial levels (280 to 560 ppm), and the global average infrared absorption rate has only increased by 1.1% (82.1% vs. 83.2%).
This is an indicator that the effectiveness of carbon dioxide as a warming agent decreases as its concentration increases.
indeed, An increase of 400 to 800 ppm “shows no significant increase in infrared absorption of the 15 μ central peak” and therefore would only lead to a warming of 0.5°C at most.
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