Dramatic research by two Queen's University biologists and a scientist from the University of Ghent suggests that the world's supply of fresh water could plummet causing drought-induced famine, political unrest and large-scale migration worldwide.
The research, which will appear in the January 27th edition of Nature, proves for the first time that extreme fluctuations in the earth's water-resources during the last millennium occurred naturally in Eastern Africa. Mounting scientific evidence now suggests that large changes in climatic conditions have occurred across the globe over the last millennium and could reoccur independent of human-induced global-warming.
The existence of extreme, global climate changes provides a clue to the future, says Dr. Brian Cumming, a biologist with Queen's Paleoecological Environmental Assessment & Research Laboratory (PEARL). "Our research clearly indicates that we should be prepared for naturally-occurring, extreme climate changes that will provoke water shortages in the future," says Dr. Cumming, who co-authored the study with Queen's biologist Kathleen Laird and University of Ghent biologist Dirk Verschuren.
The research, which was conducted on Lake Naivasha in Kenya, shows that during the past 1,100 years extreme changes in water availability occurred many times in East Africa, sometimes producing major droughts lasting hundreds of years. The study mirrors previous studies in North America, the caribbean and Europe and confirms not only that extreme variations in climate exist, but that these large-scale weather patterns may have occurred on a global scale (like the medieval warm period from 1,000 to 1,200 AD).
Now intent on identifying the trigger for extreme
climate shifts affecting water supplies in the past, the researchers speculate about the impact of current, human-induced global warm
Contact: Nancy Marrello
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