Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Breakdown of differences between the Jones and IPCC global-mean temperature data over 1861–1994: combined effect of different marine and land data sets, and different corrections to marine data. Land data set differences have a relatively minor effect. The differences shown are annual values of the difference Jones data minus IPCC data adjusted to use the Jones averaging method, with both data sets adjusted to have the same (zero) 1961–1990 means.
