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Aren't planes at higher altitudes more likely to leave a persistent contrail, why in this case is the "persistent/spreading contrail in that video at a lower altitude?
Originally posted by weedwhacker
reply to post by donatellanator
Oh, and it is important to "beat" that horse when there is so much crap being spewed......crap in these threads, by one or two very prolific individuals....who just never seem to "get it".....
Originally posted by MountainLaurel
www.youtube.com...
This video expresses the outrage that many of us feel....but also shows some interesting attachments to certain planes I had never seen before.
the cemetary there is in open field area near orchards..was there for about an hour on a day there was a heavy haze in the sky with a rainbow sheen to it..
The scope of the study includes all technologies intended to moderate climate change by reducing the amount of short wave solar energy to reach the Earth's surface. The table below outlines a working model categorisation for different solar radiation management (SRM) research activities, and will help guide initial discussions on how governance arrangements may be differentiated.
1. Computer/desk studies: theoretical studies not involving any potentially hazardous materials, having no environmental impacts.
2. Laboratory studies: experiments and other activities conducted wi thin an appropriately contained laboratory environment: no deliberate release of potentially hazardous materials, no intentional
environmental Impacts
3. Small field trials: field trials involving activities (including release of materials to the environment) of a magnitude, spatial scale and temporal duration that lead to measurable environmental effects of a magnitude considered to be insignificant (below "de minimis" levels,).
4. Large field trials: field trials involving activities (including release of materials to the environment) of a magnitude, spatial scale and temporal duration that lead to measurable and significant environmental effects (ie exceed the de minimis levels), but that are not of a sufficient magnitude, spatial scale or duration to be considered to be deployment.
5. Deployment: activities (including release of materials to the environment) leading to environmental effects of a sufficient magnitude, spatial scale or duration to affect climate significantly
Overall working group objective
To produce discussion papers for the SRMGI conference in March 2011 that consider, and make practical recommendations on, possible governance arrangements for solar radiation management (SRM) research.
This study supposedly shows a "contrail" that was made by an aircraft operating in conditions favorable to persistent contrails. It lasted for about 18 hours.
Originally posted by Soylent Green Is People
reply to post by Tecumte
I'm confused...The question was:
Aren't planes at higher altitudes more likely to leave a persistent contrail, why in this case is the "persistent/spreading contrail in that video at a lower altitude?
To which I think I provided an accurate answer.
In short, it may not really matter if a plane is at 32,000 ft or 37,000 feet. Sometimes persistent contrails will form only at the higher altitude, and sometimes only at the lower. Sometimes at both; sometime at neither. A slight difference in altitude may or may not have any bearing on whether or not a trail is produced.
If you say that my answer is incorrect, could you please elaborate with specific reasons that what I said is inaccurate.
NOTE: Successful governance requires a wide range of viewpoints. The SRMGI team welcomes your submissions on geoengineering research and governance.
Originally posted by Aloysius the Gaul
reply to post by Tecumte
It is not ignored.
Many of us are waiting for any evidence to be produced.
Same with differences in exhausts making contrails - we do know that some differences in exhausts matter - there'e a study done comparing old a/c (a 707 with JT3 engines) with a newer one (A300 with CFM56's) - you can read the whole paper here - elib.dlr.de...
And yes there is a difference - the newer engines will make contrails at a lower altitude than the old ones - exactly as expected.
Originally posted by tsurfer2000h
reply to post by MathiasAndrew
Here you go why don't you take a gander at this...
climate.envsci.rutgers.edu...
This is where your linked pdf is adapted from. Also you should look at page six and try to understand what the pros and cons are.
I have to ask you this. How can you constantly post things without even knowing what your posting. Maybe you should actually try to understand what your posting because it would help you understand what is going on.
NOTE: Successful governance requires a wide range of viewpoints. The SRMGI team welcomes your submissions on geoengineering research and governance.
twas.ictp.it...
Just wondering if you are going to submit your geoengineering research you have since you seem to have such a vast knowledge and could tell them with their research.