"Bombing Raids Sent Shockwaves To The Edge of Space!"

Hmmm....doesn't sound like the effect was all that great. However, one has to wonder what ionospheric response to the Trinity bomb plus all the following atmospheric nuclear and thermo-nuclear explosions were.

 

No it's not pointless as it refutes your initial claim that if people can't detect it it doesn't exist.

Well here's your original quote and it's at least very close to maintaining that:

You also used the term "cease to exit"

Looks like the paper proves you wrong.

 

Well, it's rather "was".
Years ago, before I chose a more business-oriented carrier I was an electronics engineer with Master's Degree in applied metrology.
Metrology generally isn't about measuring things (because it's easy) but about proving you are doing it properly - that part is frequently very hard to do right.

 

The story is that since 1932 every day at noon at Ditton Park density of electrons 250+ kilometers above Ditton Park was measured. It was only a small part of the ionosphere but the only one which strongly affects the propagation of radio waves.
Obviously, such information was very needed.

The authors of the paper say they were able to find changes in the density which corresponded to bombing raids in Europe, more than 1000 kilometers away.
The effect isn't visible to humans, it was found using computers and a statistical tool design for detecting a faint signal in lots of noise. Then using more computers and statistical tools they were able to establish that the strongest changes happened several hours after the raids.
They assumed it was sound waves, such sound waves would require an hour to reach the ionosphere above Ditton Park and disturb it by heating.
But they don't know that as a fact.

That part of the ionosphere is just a bunch of electrons (not only but electrons are the only important) and not that many of them. Because they are electrons and not that many to boot they are very easy to disturb.
That was first noticed in 1933 when a strong radio station in Luxemburg was shown to be able to modify the density of ionosphere, and simultaneously signals of other radio stations.

Generally, because it has been known since 1933 that the ionosphere is very fragile the newest "bombing" discovery (if real) is rather a footnote that a groundbreaking discovery.