Hi skeptic
1900-1940. Although the burning of fossil fuels was commonplace as early as the 1700s, CO2 concentrations were only about 295 parts per million (ppm) by 1900, just 7% higher than pre-industrial levels of 270 ppm. The warming associated with this CO2 increase is considered to be too small to account for the observed warming. However, natural factors, particularly increases in solar radiation and a decline in volcanic activity, are well correlated with temperature over this time period, indicating that the warming was predominantly due to these two factors.
Mann et al 2003.
Hi P, i'll expand on the sun soon, hi series thanks for posting the link.
In 1989, the Marshall Institute released a report arguing that "cyclical variations in the intensity of the sun would offset any climate change associated with elevated greenhouse gases." Although it was refuted by the IPCC, the report was used by the Bush Sr. Administration to argue for a more lenient climate change policy.
Sun 0.12 w/m2 (variance 0.1-0.3w/m2 1000’s years)
GHG 2.4w/m2 (Increased by ~2w/m2 100years)
George C. Marshall Institute has received $630,000 from ExxonMobil since 1998.
The marshall institute started the sun rumour or propigated it anyway.
