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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. 1246 drdavidanderson 11-Jan-18 13:12
Re: Climate change, jets and jet streams. 211 drrayeye 11-Jan-18 18:57
Re: Climate change, jets and jet streams. 156 drdavidanderson 11-Jan-18 21:23
Re: Climate change, jets and jet streams. 164 drrayeye 11-Jan-18 22:13
Re: Climate change, jets and jet streams. 168 drdavidanderson 12-Jan-18 07:03
Re: Climate change, jets and jet streams. 161 drrayeye 13-Jan-18 01:07
Re: Climate change, jets and jet streams. 152 drdavidanderson 13-Jan-18 09:22
Re: Climate change, jets and jet streams. 187 drrayeye 13-Jan-18 10:14
Re: Climate change, jets and jet streams. 140 drdavidanderson 13-Jan-18 18:08
Re: Climate change, jets and jet streams. 144 drrayeye 13-Jan-18 18:32
Re: Climate change, jets and jet streams. 144 drdavidanderson 13-Jan-18 19:54
Re: Climate change, jets and jet streams. 141 drrayeye 13-Jan-18 20:51
Re: Climate change, jets and jet streams. 152 drdavidanderson 13-Jan-18 21:43
Re: Climate change, jets and jet streams. 130 drrayeye 14-Jan-18 08:18
Re: Climate change, jets and jet streams. 160 drdavidanderson 14-Jan-18 08:36
Re: Climate change, jets and jet streams. 159 Archaic 11-Jan-18 23:48
Re: Climate change, jets and jet streams. 160 drdavidanderson 12-Jan-18 07:11
Re: Climate change, jets and jet streams. 141 Archaic 13-Jan-18 08:31
Re: Climate change, jets and jet streams. 140 Archaic 11-Jan-18 23:45
Re: Climate change, jets and jet streams. 164 carolb 12-Jan-18 01:06
Re: Climate change, jets and jet streams. 161 drdavidanderson 12-Jan-18 18:08
Re: Climate change, jets and jet streams. 137 molder 14-Jan-18 21:45
Re: Climate change, jets and jet streams. 152 drdavidanderson 15-Jan-18 11:41
Re: Climate change, jets and jet streams. 383 molder 16-Jan-18 03:22
Climate change, jets and jet streams. 186 Reagent 12-Jan-18 04:02
Re: Climate change, jets and jet streams. and The Blob 149 molder 13-Jan-18 23:23


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