Thomas Homer-Dixon on why James Hansen’s latest climate findings matter
“The bottom line is startling: Hansen’s team argues that mainstream climate science, as reflected in the IPCC’s reports, underestimates climate sensitivity to CO2 by about 50 percent. Their research suggests that the “short-term”—century time scale—equilibrium warming from a doubling of CO2e should be 4.5 degrees C, not the standard estimate of 3 degrees.
The reason for this error, in the view of Hansen and his team, is that conventional climate science, which is almost wholly wedded to climate models, has miscalculated the past impact of aerosols on warming trends. Now that shipping aerosols have declined dramatically across the north Pacific and Atlantic, that extra climate forcing is being revealed—ergo the acceleration. Paleoclimatic data, they argue, also support a substantially higher estimate of climate sensitivity.” https://chalkboard.cascadeinstitute.org/a-climate-science-wake-up-call-james-hansens-latest-research/
Is Climate-sensitivity super-wrong?
Thomas Homer-Dixon on why James Hansen’s latest climate findings matter
“The bottom line is startling: Hansen’s team argues that mainstream climate science, as reflected in the IPCC’s reports, underestimates climate sensitivity to CO2 by about 50 percent. Their research suggests that the “short-term”—century time scale—equilibrium warming from a doubling of CO2e should be 4.5 degrees C, not the standard estimate of 3 degrees.
The reason for this error, in the view of Hansen and his team, is that conventional climate science, which is almost wholly wedded to climate models, has miscalculated the past impact of aerosols on warming trends. Now that shipping aerosols have declined dramatically across the north Pacific and Atlantic, that extra climate forcing is being revealed—ergo the acceleration. Paleoclimatic data, they argue, also support a substantially higher estimate of climate sensitivity.”
https://chalkboard.cascadeinstitute.org/a-climate-science-wake-up-call-james-hansens-latest-research/