Global Warming:Has the Climate Sensitivity Holy Grail Been Found?
[Editor’s note: Last summer University of Alabama Senior Research Scientist in climatology Dr. Roy Spencer and co-authors published a paper reporting their findings that (warming) cirrus clouds diminish rather than increasing in response to rising surface temperatures, thus making them a negative rather than a positive feedback, something they estimated could reduce by 75 percent the amount of warming to be expected from doubled CO2 in the atmosphere, since all the computer climate models assumed the opposite.
- The roughly 1.0C warming over the twentieth century, with far less than a doubling of CO2, cannot have come entirely from the increased CO2, and consequently natural causes must far outweigh human causes.
- Further, future warming from future increases in CO2 will be far less than the models have projected and the alarmists predict; consequently, its effects on sea level, severe weather events, vegetation, habitats, and biodiversity will be far smaller than the alarmists have claimed.
- That, in turn, both reduces the apparent need for reductions in CO2 emissions and worsens the benefit/cost ratio of such reductions.