BLANCA MENDOZA; VICTOR VELASCO; ERNESTO JÁUREGUI (2006). «A Study of Historical Droughts in Southeastern Mexico». JOURNAL OF CLIMATE(en inglés) (American Meteorological Society) 19: 2924. «in Durango droughts are evident from 1540 to 1580».
Jim Erickson (11 de octubre de 2004). «Tree rings reveal 'megadroughts'». Deseret NewsScripps Howard News Service. Consultado el 15 de agosto de 2011. «The new record sheds light on a drought-prone 400-year period between A.D. 900 and 1300. It is punctuated by four decades-long, regionwide megadroughts centered on the years 936, 1034, 1150 and 1253.»
Ashish Sinhaa (January 2011). «A global context for megadroughts in monsoon Asia during the past millennium». Quaternary Science Reviews30 (1–2): 47-62. Bibcode:2011QSRv...30...47S. doi:10.1016/j.quascirev.2010.10.005. «Although the relationship between climate and societal change is complex and not necessarily deterministic, the widespread societal changes across monsoon Asia between the mid 13th to 15th centuries, which include famines and significant political reorganization within India ([Dando, 1980], [Pant et al., 1993] and [Maharatna, 1996]), the collapse of the Yuan dynasty in China (Zhang et al., 2008); Rajarata civilization in Sri Lanka (Indrapala, 1971), and the Khmer civilization of Angkor Wat fame in Cambodia (Buckley et al., 2010), strongly suggest that the MMDs may have played a major contributing role in shaping these societal changes.»
Ashish Sinhaa (January 2011). «A global context for megadroughts in monsoon Asia during the past millennium». Quaternary Science Reviews30 (1–2): 47-62. Bibcode:2011QSRv...30...47S. doi:10.1016/j.quascirev.2010.10.005. «Although the relationship between climate and societal change is complex and not necessarily deterministic, the widespread societal changes across monsoon Asia between the mid 13th to 15th centuries, which include famines and significant political reorganization within India ([Dando, 1980], [Pant et al., 1993] and [Maharatna, 1996]), the collapse of the Yuan dynasty in China (Zhang et al., 2008); Rajarata civilization in Sri Lanka (Indrapala, 1971), and the Khmer civilization of Angkor Wat fame in Cambodia (Buckley et al., 2010), strongly suggest that the MMDs may have played a major contributing role in shaping these societal changes.»
Catherine Brahic (16 de abril de 2009). «Africa trapped in mega-drought cycle». New Scientist. Consultado el 15 de agosto de 2011. «As well as the periodic droughts lasting decades, there was evidence that the Sahel region has undergone several droughts lasting a century or more....The most recent mega-drought was just 500 years ago, spanning 1400 to 1750 and coinciding with Europe's Little Ice Age.»
nytimes.com
William K. Stevens (19 de julio de 1994). «Severe Ancient Droughts: A Warning to California». The New York Times. Consultado el 15 de agosto de 2011. «In medieval times the California droughts coincided roughly with a warmer climate in Europe, which allowed the Vikings to colonize Greenland and vineyards to grow in England, and with a severe dry period in South America, which caused the collapse of that continent's most advanced pre-Inca empire, the rich and powerful state of Tiwanaku, other recent studies have found.»
William K. Stevens (19 de julio de 1994). «Severe Ancient Droughts: A Warning to California». The New York Times. Consultado el 15 de agosto de 2011. «The evidence for the big droughts comes from an analysis of the trunks of trees that grew in the dry beds of lakes, swamps and rivers in and adjacent to the Sierra Nevada, but died when the droughts ended and the water levels rose. Immersion in water has preserved the trunks over the centuries.»
