Medieval Warm Period

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The Medieval warm period, an era when it was much warmer than global temperatures today, lasted roughly from 1000 to 1300 A.D. - a full 400-700 years before humans began pumping out those 'deadly greenhouse gases.'[1] Willie Soon and Sallie Baliunas of the Harvard-Smithsonian Center for Astrophysics "found 112 studies containing information about the medieval warm period [in] Russia, the U.S. Corn Belt, Central Plains and Southwest; much of China and Japan; southern Africa; Argentina, Chile and Peru in South America, Australia and Antarctica ... in the Indian Ocean, both central and southern; and in the Central and Western Pacific Ocean. In the Southern Hemisphere, twenty-one of twenty-two studies (95 percent) showed evidence of the Medieval Warming." [1]

Nonetheless, AGW advocate Michael Mann said it was limited to "Europe and neighboring regions or the North Atlantic". [2]


  1. Anthony G. Martin. A thorough examination of Climategate evidence,, December 13, 2009.

See Also

  • Coherent High- and Low-Latitude Climate Variability During the Holocene Warm Period (Science, vol. 288. no. 5474, pp. 2198 - 2202, 23 June 2000) - Peter deMenocal, Joseph Ortiz, Tom Guilderson, Michael Sarnthein
  • Evidence for a 'Medieval Warm Period' in a 1,100 year tree-ring reconstruction of past austral summer temperatures in New Zealand (Geophysical Research Letters, vol. 29, no. 14, pp. 12-1 to 12-4. 15 July 2002) - E. R. Cook, J. G. Palmer, R. D'Arrigo
  • Evidence for the existence of the medieval warm period in China (Climatic Change, vol. 26, nos. 2-3, March, 1994) - De'Er Zhang
  • Glacial geological evidence for the medieval warm period (Climatic Change, vol. 26, nos. 2-3, March, 1994) - Jean M. Grove, Roy Switsur
  • Medieval climate warming and aridity as indicated by multiproxy evidence from the Kola Peninsula, Russia (Palaeogeography, Palaeoclimatology, Palaeoecology, vol. 209, issues 1-4, pp. 113-125, 6 July 2004) - K. V. Kremenetski, T. Boettger, G. M. MacDonald, T. Vaschalova, L. Sulerzhitsky, A. Hiller
  • Medieval Warm Period, Little Ice Age and 20th century temperature variability from Chesapeake Bay (Global and Planetary Change, vol. 36, issues 1-2, March 2003, Pages 17-29) - T. M. Cronin, G. S. Dwyer, T. Kamiya, S. Schwede, D. A. Willard
  • The Little Ice Age and Medieval Warm Period in the Sargasso Sea (Science, vol. 274. no. 5292, pp. 1503 - 1508, 29 November 1996) - Lloyd D. Keigwin
  • The Little Ice Age and Medieval Warming in South Africa (South African Journal of Science 96: 121-126, 2000) - P. D. Tyson, W. Karlén, K. Holmgren and G. A. Heiss
  • The 'Mediaeval Warm Period' drought recorded in Lake Huguangyan, tropical South China (Holocene, vol. 12, no. 5, pp. 511-516, 2002) - Guoqiang Chu, Jiaqi Liu, Qing Sun, Houyuan Lu, Zhaoyan Gu, Wenyuan Wang, Tungsheng Liu
  • The Medieval Warm Period in the Daihai Area (Journal of Lake Sciences, vol. 14, no. 3, pp. 209-216, September 2002) - Z. Jin, J. Shen, S. Wang, E. Zhang
  • Tree-ring and glacial evidence for the medieval warm epoch and the little ice age in southern South America (Climatic Change, vol. 26, nos. 2-3, March, 1994) - Ricardo Villalba