The jet stream is exhibiting unusual undulating behavior that’s become increasingly common in summertime over the past decade, reports Jeff Masters at Wunderground.com, causing 3 extreme weather events within the past two months. The latest was a sharp trough of low pressure over the Central US, and equally sharp ridges of high pressure over the West and East Coast. Since the jet stream acts as the boundary between cool, Canadian air to the north and warm, subtropical air to the south, this means that record heat penetrated unusually far to the northwest US under the ridges of high pressure, and record cold extended unusually far to the south into Texas under the trough of low pressure. In late May, a high pressure ridge became stuck over northern Scandanavia, causing all-time May heat records and blocked low pressure systems from moving north, which led to record rains and flooding over Austria and Germany. In mid June, a ridge of high pressure over Alaska broke all-time heat records in the state, while a low pressure system became trapped over Alberta, Canada, causing a $3 billion flood disaster in Calgary.
Join the swelling numbers of voters TELLING Congress they’ll vote for Clean Energy candidates here: http://signon.org/sign/we-are-the-clean-99?source=c.em.cp&r_by=487176 . This is an ongoing campaign (the next Congressional election is in 2 years!) so please, spread the word. It’s our way of telling Congress that a strong clean energy voting bloc is out there. This is how YOU can make a difference.
For more on Climate Change, check out my weekly column at the HuffingtonPost, Climate Change This Week : http://www.huffingtonpost.com/author/index.php?author=mary-ellen-harte
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New “Extreme” Jet Stream Has Caused 3 Extreme Climate Events in Past Two Months, reports Jeff Masters at Wunderground.com. This new behavior is becoming increasingly common during the summer over the past decade, he notes. As the jet stream, which separates cold polar from warm southern air, starts to trace gigantic undulations, it’s pushing record high AND record low temperatures into the US and elsewhere. http://www.wunderground.com/blog/JeffMasters/comment.html?entrynum=2452 in past