The map above shows the location of borehole sites in the database that we have analyzed to date. The diagram below is a global perspective of surface temperature change over the last five centuries, averaged from 837 individual reconstructions. The thick red line represents the mean surface temperature since 1500 relative to the present-day. The shading represents ± one standard error of the mean. Shown in blue for comparision is the global mean surface air temperature (five year running average) derived from instrumental records by P.D. Jones and colleagues at the University of East Anglia <http://www.cru.uea.ac.uk/>.
http://www.ncdc.noaa.gov/paleo/borehole/core.html Downloaded Sunday, 26-Oct-2008 03:44:37 EDT Last Updated Friday, 16-Sep-2005 13:36:31 EDT by paleo@noaa.gov Please see the Paleoclimatology Contact Page or the NCDC Contact Page if you have questions or comments. |