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Where is our Jet Stream?

26/7/2018

1 Comment

 
PictureRagged meadow brown, Scout Scar 26 July
 The bliss of a gentle breeze as temperatures soar, again.  Wisps of alto-stratus against the blue. We'll swelter this afternoon, but we know our good fortune to be in Cumbria.
Weather maps show Atlantic fronts massing off- shore, but they melt away and come to nothing.  A brief shower of the finest rain.
In town, the River Kent has vile-looking clots of algae   and looks sick, its current sluggish.  It smells stale.
Meanwhile, United Utilities, will at last introduce a hose-pipe ban at the beginning of August.  When will they have  robust procedures in place, toward the conservation of water, toward protecting our environment ?

Butterflies look as fagged and faded as the flora, wings worn and ragged.  Polyommatus Icarus, Common blue, its blue worn away, its wings dingy. Anthills are browned- off, failure to thrive. 
Our weather in Britain is influenced by the Jet Stream, that fast stream of air at 30,000 feet in the upper atmosphere.  If it shifts its course our weather gets stuck.  I'm eager to hear from Tomasz Shafernaker that normal service will be resumed as soon as possible: Atlantic weather systems bringing refreshing rain.
The presence of the Jet Stream, and how it works, was discovered in 1883 with the volcanic eruption of Krakatoa, an explosive force so intense that debris was sent  high into the middle part of the atmosphere, colouring sunsets, creating solar effects that were observed around the globe. An equatorial smoke stream, that's how it was seen in the aftermath of the Krakatoa volcanic eruption.  The Royal Society asked citizens to send in observations, which they collated, an early instance of citizen science.  The Jet Stream flows west to east around the Northern Hemisphere, between 100- 200 mph.  Bringing us deep areas of low pressure.
Back to weather maps to watch the progress of Atlantic lows. Bring on the thunder storms. Friday 27 is said to herald a change in the weather. 

For detail on the Jet Stream. BBC radio 4 Adam Hart,  Jet Streams.  26 July.
1 Comment
An orienteer
6/8/2018 06:36:47 am

Enjoying all your butterflies

I had over a dozen settle upon me whilst cooking my feet in a mountain stream. Is that puddling or piddling?

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    Jan Wiltshire is a nature writer living in Cumbria. She also explores islands and coast and the wildlife experience. (See Home and My Books.)

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