Graphic shows typical influence of Rossby waves on jetstream and factors leading to the Russian heatwave and Pakistan floods in July and August this year.
WEATHER
Jetstream blockage
By Phil Bainbridge
August 17, 2010 - A “blocking event” in the movement of the jetstream over the northern hemisphere is believed to be behind the sequence of extreme weather events from Russia’s heatwave to torrential rains in Pakistan and China.
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