Email 4965, July 2005, Kevin Trenberth: "...to say that the warming in the first part of the 20th century was partly due to solar, the cooling from 1940 to 1970 to increased aerosol, and the warming after 1970 to the increasing GHGs"

Email 4965

In fact this could be linked to the modeling and attribution chapter to say that the warming in the first part of the 20th century was partly due to solar, the cooling from 1940 to
1970 to increased aerosol, and the warming after 1970 to the increasing GHGs.