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20th Century One of Driest in Nine Centuries for Northwest Africa

ScienceDaily (May 25, 2010)

20th Century One of Driest in Nine Centuries for Northwest Africa

ScienceDaily (May 25, 2010)

Droughts in the late 20th century rival some of North Africa’s major droughts of centuries past, reveals new research that peers back in time to the year 1179.

The first multi-century drought reconstruction that includes Morocco, Algeria and Tunisia shows frequent and severe droughts during the 13th and 16th centuries and the latter part of the 20th century.

An international research team figured out northwest Africa’s climate history by using the information recorded in tree rings. The oldest trees sampled contain climate data from the medieval period. One tree-ring sample from Morocco dates back to the year 883.

"Water issues in this part of the world are vital," said lead researcher Ramzi Touchan of the University of Arizona. "This is the first regional climate reconstruction that can be used by water resource managers." In most of North Africa, instruments have been recording weather information for 50 years or less, too short a time to provide the long-term understanding of regional climate needed for resource planning, he said.

Pour en savoir plus (ScienceDaily)

Page publiée le 18 novembre 2011, mise à jour le 1er août 2014