noaa-recon-6276 Mann et al 1999 N.Hemisphere Temperature Reconstruction, Past Millennium Mann, M.E.; Bradley, R.S.; Hughes, M.K. Mann et al 1999 N.Hemisphere Temperature Reconstruction, Past Millennium 1999-03-17 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/6276 Investigator M.E. Mann Investigator R.S. Bradley Investigator M.K. Hughes earth science paleoclimate instrumental temperature,null,null,degree Celsius,annual,instrumental,anomalized,null,N,null earth science paleoclimate climate reconstructions temperature,multiple proxies,two standard deviations,degree Celsius,annual,climate reconstructions,anomalized,null,N,null earth science paleoclimate climate reconstructions|instrumental age,null,null,year Common Era,null,climate reconstructions|instrumental,null,null,N,null earth science paleoclimate climate reconstructions temperature,multiple proxies,null,degree Celsius,annual,climate reconstructions,anomalized,null,N,null earth science paleoclimate climate reconstructions age,null,null,year Common Era,null,climate reconstructions,null,null,N,null earth science paleoclimate climate reconstructions temperature,multiple proxies,one standard deviation,degree Celsius,annual,climate reconstructions,anomalized,null,N,null earth science paleoclimate reconstructions air temperature geoscientificInformation Air Temperature Reconstruction 1000 AD 1998 AD 950 cal yr BP -48 cal yr BP Complete 0 90 -180 180 Geographic Region Northern Hemisphere Northern Hemisphere>LATITUDE >LONGITUDE None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Records of past temperature, precipitation, and other climate variables derived from paleoclimate proxies. Parameter keywords describe what was measured in this data set. Additional summary information can be found in the abstracts of papers listed in the data set citations. STUDY NOTES: Building on recent studies, we attempt hemispheric temperature reconstructions with proxy data networks for the past millennium. We focus not just on the reconstructions, but the uncertainties therein, and important caveats. Though expanded uncertainties prevent decisive conclusions for the period prior to AD 1400, our results suggest that the latter 20th century is anomalous in the context of at least the past millennium. The 1990s was the warmest decade, and 1998 the warmest year, at moderately high levels of confidence. The 20th century warming counters a millennial-scale cooling trend which is consistent with long-term astronomical forcing. Michael E. Mann, Raymond S. Bradley, and Malcolm K. Hughes, 1999, Northern Hemisphere Temperatures During the Past Millennium: Inferences, Uncertainties, and Limitations, Geophysical Research Letters Vol. 26 , No. 6 , p. 759, March 15, 1999.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mann1999/ Data Folder; Northern Hemisphere Temperature Reconstructions GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mann1999/recons/nhem-raw.dat Data Description; Northern Hemisphere Temperature Reconstructions readme File GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mann1999/readme_mann1999.txt Data Description; Northern Hemisphere Temperature Reconstructions readme File USA/NOAA DIF Version 9.8.4 2019-02-22 2019-02-22