J. Amos, Sci. correspondent, BBC
.2022-jan-21…aprox16h00.utc
“…data from three weather satellites … was used…”
see also : 2022-01-15 volcano

  • a_HaOP
    1·
    3 years ago

    .xpost.to./c/Green?
    “Eruptions can cool the climate. The Tonga event is unlikely to do that”
    --(same source)
    “Pinatubo did have a noticeable effect, but the Hunga-Tonga volcano’s emissions were more than 30 times smaller at less than half a million tonnes of sulphur dioxide, so we don’t expect that to have a cooling effect, even though it made a huge bang when it went off…”
    Dr Richard Betts
    Head of climate impacts
    UK Met(meteorological) Office

      • MerchantsOfMisery
        3·
        3 years ago

        You’re correct. Large volcanic eruptions like Pinotubo and the more recent Tonga eruption can only cool the climate as a result if the atmospheric ash layer that they produce (tephra). This cooling occurs by partially blocking sunlight and as the ash layer gradually settles, the cooling effect is considerably diminished.

        This sort of cooling effect (ash layer cooling) isn’t exactly something we should hope for or rely on, as any ash layer significant enough to cause long term climate cooling would be spread around the world and the particulate layer that blocks the sun would also cause all kinds of issues (i.e. grounding flights because the particulate matter would cause planes to malfunction).

      • a_HaOP
        1·
        3 years ago

        i say people should know, if even to debunk falsehoods … so i call @wabooti@lemmy.ml
        mod of lemmy.ml/c/green

        Hunga-Tonga volcano’s effect could be :
        1/30 Pinatubo …
        = 1/30 x 0.5⁰C so : quite negligible.
        (according to very early information)

        i am no expert, studies will come later