NASA contrail sampling 2014 style

Back in 1972 UCAS published this paper showing the resu,ts of contrail sampling behing a DC-8.

42 years later NASA does something very similar - albeit the DC-8 has new engines that some people will tell can't possibly make contrails.........



Here's the ACCESS II page at NASA

From another page on the programme:

The story so far

Measurements taken during ACCESS I in 2013 of the burned blended fuel showed soot emissions were reduced by 40 to 60 percent compared to JP-8 fuel by itself, according to Bruce Anderson, NASA's principal investigator for the ACCESS program.

"We saw big changes in soot emissions from the DC-8, but we weren't able to make clear ties between the type of fuel burned and formation of contrails. So for ACCESS II we really want to dig into that," Anderson said.

Understanding more about contrail formation is important because they are considered an essential variable in discussions about climate change.

While it is known that contrails are ice particles that form when water vapor from jet exhaust condenses and freezes on some source of nuclei, there are a number of different models to suggest what the source of the nuclei might be, Anderson said.

The source could be soot from the jet engine exhaust, so the use of alternate fuels might reduce contrail formation. The source could be from the sulfur that is present in jet fuels, so a low-sulfur or non-sulfur fuel might make a difference. And still other models suggest that just the presence of normal background aerosols in the atmosphere is enough to trigger contrails.

"It could be any or all of those things. Some people say there’s so much water vapor in the exhaust of an aircraft that any particles at all will seed the formation of ice," Anderson said.

To help test at least one of those possibilities, for ACCESS II the DC-8 will fly with both a low sulfur and high sulfur grade of JP-8 jet fuel.

Did you not get the memo? Everything NASA says is 100% proven to be a lie .. unless it agrees with what a person really wants to be true, then it's them getting ready for disclosure.

a reply to: OccamsRazor04

Well yeah.....I was just trying to show het lengths they go to to support their lies, as opposed to eth lengths the "truth seekers" go to to support theirs.....

originally posted by: Aloysius the Gaul
a reply to: OccamsRazor04

Well yeah.....I was just trying to show het lengths they go to to support their lies, as opposed to eth lengths the "truth seekers" go to to support theirs.....

It's pretty established that's the case. I would not expect this thread to go very far as people are not interested in the truth. Great post though, it's the epitome of what ATS should be.