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Continental-scale temperature variability during the past two millennia
Fed Urdu Univ Arts Sci & Technol, Dept Bot, Karachi 75300, Pakistan.
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
Stockholm University, Faculty of Humanities, Department of History.
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2013 (English)In: Nature Geoscience, ISSN 1752-0894, Vol. 6, no 5, 339-346 p.Article in journal (Refereed) Published
Abstract [en]

Past global climate changes had strong regional expression. To elucidate their spatio-temporal pattern, we reconstructed past temperatures for seven continental-scale regions during the past one to two millennia. The most coherent feature in nearly all of the regional temperature reconstructions is a long-term cooling trend, which ended late in the nineteenth century. At multi-decadal to centennial scales, temperature variability shows distinctly different regional patterns, with more similarity within each hemisphere than between them. There were no globally synchronous multi-decadal warm or cold intervals that define a worldwide Medieval Warm Period or Little Ice Age, but all reconstructions show generally cold conditions between ad 1580 and 1880, punctuated in some regions by warm decades during the eighteenth century. The transition to these colder conditions occurred earlier in the Arctic, Europe and Asia than in North America or the Southern Hemisphere regions. Recent warming reversed the long-term cooling; during the period ad 1971–2000, the area-weighted average reconstructed temperature was higher than any other time in nearly 1,400 years.

Place, publisher, year, edition, pages
2013. Vol. 6, no 5, 339-346 p.
National Category
Climate Research Earth and Related Environmental Sciences
Research subject
Physical Geography
URN: urn:nbn:se:su:diva-89316DOI: 10.1038/NGEO1797ISI: 000318227000011OAI: diva2:617118

Author count: 78;

Available from: 2013-04-22 Created: 2013-04-22 Last updated: 2013-06-10Bibliographically approved

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Krusic, Paul J.Charpentier Ljungqvist, Fredrik
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