The Pennsylvania State University, National Oceanic and Atmospheric Administration Paleoclimatology Program, World Data Center for Paleoclimatology
Michael E. Mann

psu-nhhad_eiv_composite

Proxy-based reconstructions of hemispheric and global surface temperature variations over the past two millennia

Published in 2007. Version N/A.
Michael E. Mann

Following the suggestions of a recent National Research Council report [NRC (National Research Council) (2006) Surface Temperature Reconstructions for the Last 2,000 Years (Natl Acad Press, Washington, DC).], we reconstruct surface temperature at hemispheric and global scale for much of the last 2,000 years using a greatly expanded set of proxy data for decadal-to-centennial climate changes, recently updated instrumental data, and complementary methods that have been thoroughly tested and validated with model simulation experiments. Our results extend previous conclusions that recent Northern Hemisphere surface temperature increases are likely anomalous in a long-term context. Recent warmth appears anomalous for at least the past 1,300 years whether or not tree-ring data are used. If tree-ring data are used, the conclusion can be extended to at least the past 1,700 years, but with additional strong caveats. The reconstructed amplitude of change over past centuries is greater than hitherto reported, with somewhat greater Medieval warmth in the Northern Hemisphere, albeit still not reaching recent levels.

http://www.meteo.psu.edu/~mann/supplements/MultiproxyMeans07/data/reconstructions/eiv/nhhad_eiv_composite.csv

Identified by : DOI: 10.1073/pnas.0805721105

This dataset was released on September 09, 2008.

The temporal extent of this dataset is 0300-01-01T00:00:00/2006-12-31T23:59:59.

Provenance

This dataset was informed by Proxy-based reconstructions of hemispheric and global surface temperature variations over the past two millennia

• 3 images were derived from this dataset : image ea068b20, image 03cbf10a, image fb33b08b

When citing this dataset please refer to Mann, M. E., Zhang, Z., Hughes, M. K., Bradley, R. S., Miller, S. K., Rutherford, S., & Ni, F., 2008: Proxy-based reconstructions of hemispheric and global surface temperature variations over the past two millennia. Proceedings of the National Academy of Sciences, 105(36), 13252-13257. doi: 10.1073/pnas.0805721105.

Attributes : Surface temperatures