Roger Coppock wrote:
Here, from Hadley Centre, are the global sea surface
temperatures from 1850 to 2006. Please see:

http://members.cox.net/rcoppock/HadSST2gl.jpg

As predicted by Arrhenius over a century ago,
the rate of sea warming is slower than global land
warming. NASA GISS has global land surface
warming at .58K/per century between 1880 and
2006. (Please see:
http://data.giss.nasa.gov/gistemp/tabledata/GLB.Ts.txt)

These data come from:
http://www.cru.uea.ac.uk/cru/data/temperature/

Why is 1970-ish the baseline for the temperature anomaly?

What was the sensitivity/accuracy of the thermometers used?

Why should I care that sea surface temperatures have risen over the past
150 years?