1887

News Picks : Shrinking Aral Sea has recovered from worse water losses in the past

By: Physics Today
23 May 2014
New Scientist: In 1961 central Asia's Aral Sea was the fourth largest lake in the world. At present, it has split in two and covers just one-tenth the area it did at its peak. The primary cause for the shrinking is the establishment and expansion of irrigation systems that draw water from the rivers feeding the lake. Although the northern of the two remaining lakes has recovered somewhat, the southern lake had been considered a lost cause. Now, carbon dating of cores taken from the exposed lakebed suggest the southern lake could recover as well. Sergey Krivonogov of the Institute of Geology and Mineralogy in Novosibirsk, Russia, and his colleagues discovered that between AD 400 and 600 the lake's surface was just 10 m above sea level, and between AD 1000 and 1500 it was just 29 m above sea level. In comparison, the surface was at 54 m in 1961. Currently, the northern lake is at 42 m, but the southern lake has split into three pieces, each less than 29 m above sea level.

Comments

Submit comment
Close
Comment moderation successfully completed
This is a required field
Please enter a valid email address
This feature is disabled while Scitation upgrades its access control system.
This feature is disabled while Scitation upgrades its access control system.
e0bf90919b92373893d51373e6a49b70 weblog.blogpostzxybnytfddd
Scitation: News Picks: Shrinking Aral Sea has recovered from worse water losses in the past
http://aip.metastore.ingenta.com/content/aip/magazine/physicstoday/news/news-picks/shrinking-aral-sea-has-recovered-from-worse-water-losses-in-the-past-a-news-pick-post