The Great Channel 4 Swindle. Robin Hogan Thanks to: Jonathan Gregory, Giles Harrison and Peter Stott. Return. Overview. The following claims were made in “The Great Global Warming Swindle” produced by Martin Durkin: “Concentrations of CO 2 are too small to be important”
The Great Channel 4 Swindle
Thanks to: Jonathan Gregory, Giles Harrison and Peter Stott
Carbon dioxide absorption in the middle of the infrared spectrum
…a daft comment anyway: 300 ppmv of HCN is lethal, so why shouldn’t 300 ppmv of CO2 be important?
Carbon dioxide and other gases
Tropospheric aerosol emissions
Land use changes
Natural forcings with an established mechanism
Stratospheric aerosol (volcanoes)
Solar irradiance changes
Changes to Earth’s orbit (Milankovic cycles) (~20 kyr)
Solar cycle effect on ozone via UV modulation (11 yr)
Possible natural forcings lacking an established mechanism
Cosmic ray effects on clouds (11 or 22 yr?)
Solar system and galactic spiral arms (~0.5 Gyr)
And natural variability!
Official NASA data have an earlier upturn
Solar irradiance + volcanoes
Carbon dioxide + aerosols
Smoothed solar-cycle length
Un-smoothed points (end of time series as of 1991)
When the new data became available: Lassen and Friis-Christensen 2000
Corrected by Damon and Laut (2004)
Upturn previously used to explain recent warming now looks like a blip!
Damon and Laut (2004)
Christy and Spencer (2003) analysis indicated troposphere warming slower than surface
Mears and Wentz corrected for diurnal drift of satellite: there is now consistency with theory
*TAR = Third Assessment Report, IPCC 2001
El Chichon 1982
Mauna Loa is itself a volcano!
John Houghton’s site
The graphs from the programme