Climate Scientists are Steadily Reducing Estimates of Warming from CO2

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Among climate scientists specializing in climate sensitivity there is a clear trend toward lower and lower estimates of it, as the chart below shows. Why? Because the empirical measurements of GAT have fallen so much lower than model-generated predictions. In the chart, the dates are dates of publication (bottom axis) of peer-reviewed studies making estimates […]

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“Global warming really has become a new religion”–Nobel Physicist Ivar Giaever

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Ivar Giaever explains in this video lecture why he rejects global warming alarming. “It’s ridiculous,” he says, to think we can measure global average temperature (GAT) accurately, and that we should consider an increase in GAT from ~1880 to 2015 from ~288 degrees Kelvin to ~288.8 degrees Kelvin (an increase of only 0.3%) frightening. There’s

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Validation of IPCC’s Global Warming Forecasts would Require More than Tripling Warming Rate

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At +0.11C per decade rate, Global Average Temperature would rise 1.1C in a century, not the ~3C generally predicted by IPCC without CO2 emission reduction. Actual increase in the 36.5 years since 1978 is 0.407C. To wind up with 3C increase in the century from 1978 through 2077, we’d need to add another 2.593C in

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Why do I Think Climate Alarmists Are Overreacting?

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Religion Dispatches posted Jacob J. Erickson’s interesting article “Falling in Love with the Earth: Francis’ Faithful Ecology,” about a week ago, and one follower, “Whiskyjack,” chastened Catholic Republican Presidential candidates for hypocrisy on the grounds that they accept his authority on abortion and homosexuality but not on climate change. I replied: Catholic dogma holds that

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Estimates of climate sensitivity falling

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Just came across this, and it’s stunning. Those who charge CAGW skeptics with being anti-science need to take a look at this and consider carefully: Who’s been trending right about how much warming comes from adding CO2 to the atmosphere? For in-depth discussion, see Nicholas Lewis, “Pitfalls in climate sensitivity estimation,” Part 1, Part 2, and

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Defense of Climate Models Fails–Just as the Models Do

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Critics of CAGW alarmism have for several years had fun pointing out the large and growing discrepancy between computer climate model simulations of global average temperature and real-world observations, with this graph being one of our favorite exhibits: Now Alex Sen Gupta, Senior Lecturer, School of Biological, Earth and Environmental Sciences at UNSW Australia, has come

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New Observational Evidence Supports Old “Infrared Iris” Theory

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About seven years ago I read a fascinating paper by Roy Spencer et al. that argued that clouds respond to Earth’s surface temperatures in ways that moderate them–cooling the surface in response to warming, warming it in response to cooling. It led me to an earlier paper by Richard Lindzen that argued that, at least in

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