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As California finally experienced the arrival of a rain-bearing Pineapple Express last week, two climate scientists have shown that the drought of 2012-2014 has been the worst in 1,200 years.
A new tree-ring study, led by the University of Arizona, reveals that long-term droughts in Southwestern North America often mean a failure of both summer and winter rains. This contradicts a long held belief that a dry winter rainy season is usually followed by a wet monsoon season, or vice versa.
Immunologist Thomas L.
- In the month which preceded the present; in the last month, as distinguished from the current or present month and all others.