WMO: The pressure wave generated by the volcanic eruption in Tonga
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https://www3.nhk.or.jp/nhkworld/en/news/20220116_36/
"... These facts are reminders that we all share the same atmosphere, all around the globe.".Pressure change in my hometown because of the shock wave
in the atmosphere!
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@gkikas-lgpz
Very impressive ! It has been noted in my country too in several wx stations. I was not aware this phenomena would be possible at the opposite position on the globe of the volcanic eruption. -
@idefix37
If "the flap of a butterfly’s wings in Brazil set off a tornado in Texas"
we must expect low predictability by wx. models into next days :)
We'll see! -
@gkikas-lgpz
The Volcanic eruption has brought a lot of sulfur dioxide into the atmosphere.
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The very rapid change in pressure probably propagated through the atmosphere like a wave.
But it is strange to see on your SO2 map wave circles like those that appear when you throw a pebble in the water. -
@idefix37
A pebble in the water, produces transverse waves,
with the surface going up and down.
Pressure waves from the volcanic eruption are longitudinal waves
(like those of sound) and are consisting of alternating compressions and rarefactions in a medium (air).
Seems that compressions correspond to high SO2 density. -
@gkikas-lgpz
You are absolutely right. I used the image of a pebble in the water, just to evoke the possible vibratory cause of the typical drawing shown in the SO2 map. -
@Gkikas-LGPZ
Beautiful imagery gathered on the Eumetsat website, specially that showing the shockwaves
https://www.eumetsat.int/hunga-tonga-hunga-haapai_2022
And here a very interesting article:
https://eos.org/articles/the-surprising-reach-of-tongas-giant-atmospheric-waves -
@idefix37
Thanks for sharing this info with us !
