However, since actual temperature and CO2 data result in a current climate sensitivity of ca. 1.25, there is plainly something wrong with the current “fad” for climate sensitivities of 3 or more.
Laws protecting Koalas and "the magnificent brood frog" have prevented a renewable energy company from clearing 500 acres of native vegetation in the Australian tropics.
By Frank Bosse and Nic Lewis A recent article by Roy Spencer was (strongly) criticized by Gavin Schmidt over at “Real Climate”. In the summary Gavin S. wrote: “Spencer’s shenanigans are designed to mislead readers...
The problems encountered by scientists trying to put a number on Equilibrium Climate Sensitivity (ECS) for CO2x2 are almost insurmountable because of this complexity and estimates, consequently, vary greatly.
From the NoTricksZone By Kenneth Richard Doubling the 2005 CO2 concentration (380 ppm) to 760 ppm only produces a globally-averaged 2.26 W/m² perturbation at the top of the atmosphere (TOA). This…
Is it possible to simplify the climate sensitivity debate?
...he leads are increasingly strongly biased towards overheated projections and dire conclusions.
James Hansen’s latest paper “Global warming in the pipeline” (Hansen et al. (2023)) has already been heavily criticized in a lengthy comment by Michael Mann, author of the original IPCC ‘hockey stick’....
From Dr. Roy Spencer: If we assume ALL *observed* warming of the deep oceans and land since 1970 has been due to humans, we get an effective climate sensitivity to…
Guest Post by Willis Eschenbach I got to thinking about the classical way to measure the very poorly-named “greenhouse effect”, which has nothing to do with greenhouses...
By Andy May The argument about the proper way to estimate error in the European Centre for Medium-Range Weather Forecast (ECMWF) ERA5 weather reanalysis dataset between Nicola Scafetta and Gavin…
Why matching of CMIP5 model-simulated to observed warming does not indicate model skill A well-known Dutch journalist, Maarten Keulemans of De Volkskrant, recently tweeted an open letter to the Nobel-prizewinning physicist...
Assuming that the climate sensitivity from Lewis22 is correct and that RCP3.4 is the most appropriate emissions scenario, then we find that global temperatures will rise by less than 1°C from 2023 to 2100 (not accounting...
On that assumption, each $1 billion spent on abatement would prevent less than 1/10,000,000 C:
By Andy May In part one we discussed various estimates of climate sensitivity (ECS, TCR, and observation-based values) and what they mean, especially those reported in the latest IPCC report,…
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