NOAA NCDC National Climatic Data Center
NOAA Paleoclimatology Program, NCDC Paleoclimatology Branch  
Paleoclimatology Navigation Bar Bookmark and Share
NOAA National Environmental Satellite, Data, and Information Service National Oceanic and Atmospheric Administration NOAA National Climatic Data Center U.S. Department of Commerce Paleo Home Data Paleo Projects Paleo Perspectives Education and Outreach About Paleo Program Site Map GW Home Story Data End Site Map Global Warming Spanish Page Contact NOAA Paleo
top

Global Temperatures of the Last Five Centuries


End

Henry N. Pollack, Shaopeng Huang and Po-Yu Shen

Complete Scientific Reference

Summary:

Pollack et al. recently generated a global temperature Borehole Locations Map reconstruction using a totally different paleoclimate proxy than those used in the other studies discussed on this set of web pages. In this study, underground temperature measurements were examined from a database of over 350 bore holes in eastern North America, Central Europe, Southern Africa and Australia. Using this unique approach, Pollack et al. found that the 20th century to be the warmest of the past five centuries, thus confirming the results of earlier multi-proxy studies.

Reconstruction, Pollack et al. The geophysical methods used to generate bore hole temperature reconstructions do not permit annual or decade resolution, but only the century-scale trend in temperatures over the last several centuries. Nonetheless, this record, totally independent of data and methods used in other studies, shows the same thing: the Earth is warming dramatically.

The instrumental record of global temperature change is also shown (in blue) for comparison.
Surface Temperature Graph
For larger viewing version of these graphs please click on the graphs themselves. Link to Pollack Data and information...

On to... "Paleo Data Before 2000 Years Ago"
Back to... "Paleo Data of the Last 2000 Years"

Dividing Line
Privacy Policy information Open Access Climate Data Policy link USA logo Disclaimer information
Dividing Line
http://www.ncdc.noaa.gov/paleo/globalwarming/pollack.html
Downloaded Thursday, 18-Dec-2014 23:53:13 EST
Last Updated Wednesday, 20-Aug-2008 11:23:45 EDT by paleo@noaa.gov
Please see the Paleoclimatology Contact Page or the NCDC Contact Page if you have questions or comments.