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    Home»Science & Environment»Undersea volcano eruption in Tonga was a “once-in-a-lifetime event” that could warm Earth’s surface, scientists say
    Science & Environment

    Undersea volcano eruption in Tonga was a “once-in-a-lifetime event” that could warm Earth’s surface, scientists say

    By adminSeptember 23, 2022Updated:September 23, 2022No Comments0 Views
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    When an undersea volcano erupted in Tonga in January, its watery blast was enormous and strange — and scientists are nonetheless making an attempt to grasp its impacts.

    The volcano, often known as Hunga Tonga-Hunga Ha’apai, shot thousands and thousands of tons of water vapor excessive up into the environment, in line with a examine printed Thursday in the journal Science.

    The researchers estimate the eruption, which dwarfed the ability of the Hiroshima atomic bombraised the quantity of water in the stratosphere – the second layer of the environment, above the vary the place people stay and breathe – by round 5%.

    Now, scientists are attempting to determine how all that water could have an effect on the environment, and whether or not it’d warm Earth’s floor over the subsequent few years.

    “This was a once-in-a-lifetime event,” mentioned lead creator Holger Voemel, a scientist on the National Center for Atmospheric Research in Colorado.

    FILE PHOTO: Satellite view of the eruption of an underwater volcano off Tonga
    The eruption of an underwater volcano off Tonga is seen in a picture from a NOAA GOES-West satellite tv for pc taken on January 15, 2022.

    CIRA / NOAA / Handout by way of REUTERS


    Big eruptions often cool the planet. Most volcanoes ship up giant quantities of sulfur, which blocks the solar’s rays, defined Matthew Toohey, a local weather researcher on the University of Saskatchewan who was not concerned in the examine.

    The Tongan blast was a lot soggier: The eruption began beneath the ocean, so it shot up a plume with rather more water than traditional. And since water vapor acts as a heat-trapping greenhouse gasoline, the eruption will most likely elevate temperatures as a substitute of decreasing them, Toohey mentioned.

    It’s unclear simply how a lot warming could be in retailer.

    Karen Rosenlof, a local weather scientist on the National Oceanic and Atmospheric Administration who was not concerned with the examine, mentioned she expects the results to be minimal and non permanent.

    “This amount of increase might warm the surface a small amount for a short amount of time,” Rosenlof mentioned in an electronic mail.

    In August, scientists mentioned it broke “all records” for the injection of water vapor since satellites started recording such information — sufficient water vapor to fill 58,000 Olympic-sized swimming swimming pools,

    The water vapor will stick across the higher environment for a few years earlier than making its means into the decrease environment, Toohey mentioned. In the meantime, the additional water may additionally pace up ozone loss in the environment, Rosenlof added.

    But it is exhausting for scientists to say for positive, as a result of they’ve by no means seen an eruption like this one.

    The stratosphere stretches from round 7.5 miles to 31 miles above Earth and is often very dry, Voemel defined.

    Voemel’s group estimated the volcano’s plume utilizing a community of devices suspended from climate balloons. Usually, these instruments cannot even measure water ranges in the stratosphere as a result of the quantities are so low, Voemel mentioned.

    Another analysis group monitored the blast utilizing an instrument on a NASA satellite tv for pc. In their examine, printed earlier this summer season, they estimated the eruption to be even larger, including round 150 million metric tons of water vapor to the stratosphere – 3 times as a lot as Voemel’s examine discovered.

    In that examine, scientists additionally concluded that the unprecedented plume could quickly have an effect on Earth’s world common temperature.

    Voemel acknowledged that the satellite tv for pc imaging might need noticed elements of the plume that the balloon devices could not catch, making its estimate greater.

    Either means, he mentioned, the Tongan blast was not like something seen in current historical past, and learning its aftermath could maintain new insights into our environment.

    e2-tonga-ash-plume-width-1320.jpg
    An picture from the ISS from Jan. 16, 2022, reveals the ash plume from the Hunga Tonga-Hunga Ha’apai volcanic eruption that occurred the day earlier than.

    NASA


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