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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. 1091 drdavidanderson 11-Jan-18 13:12
Re: Climate change, jets and jet streams. 168 drrayeye 11-Jan-18 18:57
Re: Climate change, jets and jet streams. 109 drdavidanderson 11-Jan-18 21:23
Re: Climate change, jets and jet streams. 125 drrayeye 11-Jan-18 22:13
Re: Climate change, jets and jet streams. 105 drdavidanderson 12-Jan-18 07:03
Re: Climate change, jets and jet streams. 111 drrayeye 13-Jan-18 01:07
Re: Climate change, jets and jet streams. 102 drdavidanderson 13-Jan-18 09:22
Re: Climate change, jets and jet streams. 128 drrayeye 13-Jan-18 10:14
Re: Climate change, jets and jet streams. 96 drdavidanderson 13-Jan-18 18:08
Re: Climate change, jets and jet streams. 103 drrayeye 13-Jan-18 18:32
Re: Climate change, jets and jet streams. 96 drdavidanderson 13-Jan-18 19:54
Re: Climate change, jets and jet streams. 100 drrayeye 13-Jan-18 20:51
Re: Climate change, jets and jet streams. 101 drdavidanderson 13-Jan-18 21:43
Re: Climate change, jets and jet streams. 91 drrayeye 14-Jan-18 08:18
Re: Climate change, jets and jet streams. 103 drdavidanderson 14-Jan-18 08:36
Re: Climate change, jets and jet streams. 117 Archaic 11-Jan-18 23:48
Re: Climate change, jets and jet streams. 113 drdavidanderson 12-Jan-18 07:11
Re: Climate change, jets and jet streams. 101 Archaic 13-Jan-18 08:31
Re: Climate change, jets and jet streams. 99 Archaic 11-Jan-18 23:45
Re: Climate change, jets and jet streams. 125 carolb 12-Jan-18 01:06
Re: Climate change, jets and jet streams. 113 drdavidanderson 12-Jan-18 18:08
Re: Climate change, jets and jet streams. 98 molder 14-Jan-18 21:45
Re: Climate change, jets and jet streams. 106 drdavidanderson 15-Jan-18 11:41
Re: Climate change, jets and jet streams. 314 molder 16-Jan-18 03:22
Climate change, jets and jet streams. 142 Reagent 12-Jan-18 04:02
Re: Climate change, jets and jet streams. and The Blob 106 molder 13-Jan-18 23:23


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