Global Average Temperatures from UAH
John Christy and Roy Spencer at the University of Alabama in Huntsville have produced credible temperature data from satellite measurements since 1979 which are used for the World Climate Widget available from Anthony Watts’ www.wattsupwiththat.com.
Roy Spencer maintains a useful, latest global temperature change page on his website. On 16th March he posted an interesting analysis of the Urban Heat Island effect. Both pages are well worth a visit.
and here are global sea surface temperatures (x10) plotted against the Nino3.4 region average from the tropical E. Pacific which suggests a relationship between SSTs and global temperatures which lag the former.
Anthony Watts has undertaken extensive study of the urban heat island effect and conducted a physical study of surface temperature measurement stations throughout the USA. He also authored a paper with Joseph D’Aleo:
SURFACE TEMPERATURE RECORDS: POLICY DRIVEN DECEPTION?
by Joseph D’Aleo & Anthony Watts | January 29, 2010
Meanwhile, Dr Judith Curry of the Georgia Institute of Technology has written an essay On the Credibility of Climate Research, Part II: Towards Rebuilding Trust which offers useful insights into the current state of climate science, how AGW scepticism has evolved and suggests how trust can be rebuilt.