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TitleSupplementary data, code, and other information for ‘Global Signatures and Dynamical Origins of the Little Ice Age and Medieval Climate Anomaly’ (Science, Mann et al. 2009)
AbstractGlobal temperatures are known to have varied over the past 1500 years, but the spatial patterns have remained poorly defined. We used a global climate proxy network to reconstruct surface temperature patterns over this interval. The Medieval period is found to display warmth that matches or exceeds that of the past decade in some regions, but which falls well below recent levels globally. This period is marked by a tendency for La Niña–like conditions in the tropical Pacific. The coldest temperatures of the Little Ice Age are observed over the interval 1400 to 1700 C.E., with greatest cooling over the extratropical Northern Hemisphere continents. The patterns of temperature change imply dynamical responses of climate to natural radiative forcing changes involving El Niño and the North Atlantic Oscillation–Arctic Oscillation.
MetadataClick here for full metadata
Data DOIdoi:10.26208/b6tz-2708

Mann, M. E.
Penn State Department of Meteorology
Zhang, Z.
Penn State
Rutherford, S.
Roger Williams University
Bradley, R. S.
University of Massachusetts
Hughes, M. K.
University of Arizona
Shindall, D.
NASA Goddard Institute for Space Studies
Ammann, C.
National Center for Atmospheric Research
Faluvegi , G.
NASA Goddard Institute for Space Studies
Ni, F.
University of Arizona

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Mann, M.E., Zhang, Z., Rutherford, S., Bradley, R.S., Hughes, M.K., Shindell, D., Ammann, C., Faluvegi, G., Ni, F., Global Signatures and Dynamical Origins of the Little Ice Age and Medieval Climate Anomaly, Science, 326, 1256-1260, 2009.