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Thanks Ray,
If dispassionate scientists were involved, then simple controlled observational experiments would be done to actually measure the effect. As aircraft get bigger the effect is likely to get larger. Of course most of the force of the engines goes into lift rather than forward thrust, in other words a downward and deepening effect on the stream it is flying through. An A380 at lift off weighs 550 tonnes, and if we assume an average weight of a transatlantic aircraft of 250 tonnes, with 2,500 crossing the Atlantic (for example) each day, it amounts to over 60,000 tonnes net downward force along the length of the stream being abused. It should not just be assumed that the effect is negligible. Time, surely, for some real data?
David

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Climate change, jets and jet streams. 1145 drdavidanderson 11-Jan-18 13:12
Re: Climate change, jets and jet streams. 180 drrayeye 11-Jan-18 18:57
Re: Climate change, jets and jet streams. 123 drdavidanderson 11-Jan-18 21:23
Re: Climate change, jets and jet streams. 136 drrayeye 11-Jan-18 22:13
Re: Climate change, jets and jet streams. 130 drdavidanderson 12-Jan-18 07:03
Re: Climate change, jets and jet streams. 123 drrayeye 13-Jan-18 01:07
Re: Climate change, jets and jet streams. 114 drdavidanderson 13-Jan-18 09:22
Re: Climate change, jets and jet streams. 153 drrayeye 13-Jan-18 10:14
Re: Climate change, jets and jet streams. 109 drdavidanderson 13-Jan-18 18:08
Re: Climate change, jets and jet streams. 115 drrayeye 13-Jan-18 18:32
Re: Climate change, jets and jet streams. 112 drdavidanderson 13-Jan-18 19:54
Re: Climate change, jets and jet streams. 111 drrayeye 13-Jan-18 20:51
Re: Climate change, jets and jet streams. 115 drdavidanderson 13-Jan-18 21:43
Re: Climate change, jets and jet streams. 100 drrayeye 14-Jan-18 08:18
Re: Climate change, jets and jet streams. 120 drdavidanderson 14-Jan-18 08:36
Re: Climate change, jets and jet streams. 125 Archaic 11-Jan-18 23:48
Re: Climate change, jets and jet streams. 126 drdavidanderson 12-Jan-18 07:11
Re: Climate change, jets and jet streams. 109 Archaic 13-Jan-18 08:31
Re: Climate change, jets and jet streams. 108 Archaic 11-Jan-18 23:45
Re: Climate change, jets and jet streams. 136 carolb 12-Jan-18 01:06
Re: Climate change, jets and jet streams. 128 drdavidanderson 12-Jan-18 18:08
Re: Climate change, jets and jet streams. 108 molder 14-Jan-18 21:45
Re: Climate change, jets and jet streams. 120 drdavidanderson 15-Jan-18 11:41
Re: Climate change, jets and jet streams. 336 molder 16-Jan-18 03:22
Climate change, jets and jet streams. 155 Reagent 12-Jan-18 04:02
Re: Climate change, jets and jet streams. and The Blob 119 molder 13-Jan-18 23:23


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