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Thanks Carol. Contrails and the condensation that causes them are only a part of the story, and I doubt if the no-flying after 9/11 went on long enough anyway. But surely if there was a will, at least some observational studies could be undertaken to answer the simple question 'do aircraft flying in the jet streams affect their speed, depth or behaviour?' This would need planning and money, but how much are the climatic disasters we are seeing costing in terms of physical damage and human suffering?

This is what meteorologist Geoff Masters had to say on August 10th 2014 on a five minute interview on ‘the real news’ on ow the Jet Stream Affects Weather Patterns.......
(see [www.therealnews.com])

.....‘Yeah. I was talking about the jet stream, which is that upper-level river of air that tends to control our weather. And the reason it controls our weather is because it acts as the boundary between cold air to the polar side and then warmer subtropical air on the other side. And normally the jet stream flows straight, West to East over our latitudes, which means you don't have a big sort of variation in the weather patterns. But when that jet stream starts to take these big bows, these big excursions like a meandering river, that's when we tend to get really major extreme weather events.

‘In particular, this past winter over the Eastern U.S. and Midwest, this so-called polar vortex episode happened. And what that was: it was a big bulge in the jet stream. It went way far to the south, allowing cold air to spill out of Canada, down much farther south than usual. And on the converse side, over in California you have a compensating ridge, kind of a U-shaped bulge in the jet stream going far to the north, which allowed very warm air from Mexico in the south to bring California its warmest and driest winter on record. So when you get one of these major jet stream undulations, it tends to bring extreme weather of both kinds, both the hot extreme and the cold extreme, and wet and dry extremes.

‘And there's evidence that these sorts of unusual jet stream undulations are increasing in frequency. In fact, they've doubled over the past 11 years compared to the previous 22 years. So that's a big concern. And we don't even know what's causing this jet stream behavior, but it makes sense that something to do with climate change might be involved. When you put the level of heat and moisture into the atmosphere that we've done over the past few decades, something has to give. Weather patterns have to shift. And one of the culprits we're looking at right now is the fact that the sea ice in the Arctic is about a factor of 2 less than it was 40 years ago, and that could be affecting global weather patterns and the jet stream.’

So here we have an eminent concerned meteorologist, and all he talks about is CO2 and reducing the burning of fossil fuels, while studiously ignoring the fact that those same jet streams are being systematically abused in a way never tried before. Also, incidentally ignoring the obvious fact that there is enough heat at the equator to melt all the sea ice (and doubtless much more) if the atmosphere is churned up enough.

David

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Subject Views Written By Posted
Climate change, jets and jet streams. 1014 drdavidanderson 11-Jan-18 13:12
Re: Climate change, jets and jet streams. 152 drrayeye 11-Jan-18 18:57
Re: Climate change, jets and jet streams. 93 drdavidanderson 11-Jan-18 21:23
Re: Climate change, jets and jet streams. 108 drrayeye 11-Jan-18 22:13
Re: Climate change, jets and jet streams. 84 drdavidanderson 12-Jan-18 07:03
Re: Climate change, jets and jet streams. 97 drrayeye 13-Jan-18 01:07
Re: Climate change, jets and jet streams. 86 drdavidanderson 13-Jan-18 09:22
Re: Climate change, jets and jet streams. 105 drrayeye 13-Jan-18 10:14
Re: Climate change, jets and jet streams. 82 drdavidanderson 13-Jan-18 18:08
Re: Climate change, jets and jet streams. 91 drrayeye 13-Jan-18 18:32
Re: Climate change, jets and jet streams. 82 drdavidanderson 13-Jan-18 19:54
Re: Climate change, jets and jet streams. 82 drrayeye 13-Jan-18 20:51
Re: Climate change, jets and jet streams. 86 drdavidanderson 13-Jan-18 21:43
Re: Climate change, jets and jet streams. 79 drrayeye 14-Jan-18 08:18
Re: Climate change, jets and jet streams. 90 drdavidanderson 14-Jan-18 08:36
Re: Climate change, jets and jet streams. 104 Archaic 11-Jan-18 23:48
Re: Climate change, jets and jet streams. 98 drdavidanderson 12-Jan-18 07:11
Re: Climate change, jets and jet streams. 88 Archaic 13-Jan-18 08:31
Re: Climate change, jets and jet streams. 88 Archaic 11-Jan-18 23:45
Re: Climate change, jets and jet streams. 110 carolb 12-Jan-18 01:06
Re: Climate change, jets and jet streams. 99 drdavidanderson 12-Jan-18 18:08
Re: Climate change, jets and jet streams. 86 molder 14-Jan-18 21:45
Re: Climate change, jets and jet streams. 90 drdavidanderson 15-Jan-18 11:41
Re: Climate change, jets and jet streams. 271 molder 16-Jan-18 03:22
Climate change, jets and jet streams. 130 Reagent 12-Jan-18 04:02
Re: Climate change, jets and jet streams. and The Blob 95 molder 13-Jan-18 23:23


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