New Study: A ‘Profound’ ~1°C Cooling Trend Across East Antarctica Since 1979 Is ‘Likely To Accelerate’

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Except for a few pockets of warming along the West Antarctic coast, surface air temperatures have cooled profoundly across East Antarctica – most of the continent, as well as the surrounding Southern Ocean – in the last 40 years (1979-2018). About 30% of the cooling can be explained by Madden-Julian Oscillation forcing.

Atmospheric CO2 concentrations rose from 337 ppm in 1979 to 408 ppm in 2018.

But according to graphical illustrations of surface air temperature (SAT) trends from satellite observations documented in a new study (Hsu et al., 2021), nearly the entire continent of Antarctica and much of the surrounding Southern Ocean have undergone about -0.02°C/year (-0.2°C per decade) SAT cooling during this period.

East Antarctica’s temperatures have fallen by about 1°C in the last 40 years, with approximately -0.4°C cooling from 1999-2018 relative to 1979-1998.

Per the authors, one-third of this 40-year cooling trend can be attributed to Madden-Julian Oscillation (MJO) forcing. The MJO influence is “likely to accelerate” the long-term cooling trend for East Antarctica in the coming decades.

Image Source: Hsu et al., 2021
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9 responses to “New Study: A ‘Profound’ ~1°C Cooling Trend Across East Antarctica Since 1979 Is ‘Likely To Accelerate’”

  1. John F Hultquist

    Since the study ended, CO2 is up another 10ppm.
    Just thought I’d mention this.
    Not making any significance of it.

    1. Phil Salmon

      That’s going to make Antarctica colder still. Over Antarctica the greenhouse effect is negative.

      https://ptolemy2.wordpress.com/2021/05/16/negative-greenhouse-effect-over-the-high-and-cold-antarctic-plateau/

  2. Climate change makes Antarctic summers… cooler – Climate- Science.press

    […] graphs come from a paper that Kenneth Richard at NoTricksZone found. The authors Hsu et al think the cooling trend has a natural explanation (but if it had been […]

  3. Travis T. Jones

    2003: “Climatologists are desperately trying to explain the mystery of where southern Australia’s winter rainfall is going.

    They’ve known the rain is being pulled south by an unexplained force.

    Now they’ve devised a revolutionary new theory to explain why.

    It appears that the circulation of the entire Southern Hemisphere is changing to suck our rain away.

    Most disturbing of all we might be responsible for shifting the speed of the vortex.

    The reason is the Antarctic Vortex – a natural tornado of 30km high, super-cold, super-fast winds spiralling around Antarctica.”

    Featuring comments from:
    Dr David Jones, Bureau of Meteorology
    Dr James Risbey, Monash University
    Kevin Hennessy, CSIRO

    The Drought Vortex
    https://www.abc.net.au/catalyst/drought-vortex/11007620

  4. Climate change makes Antarctic summers… cooler - Conservative News

    […] graphs come from a paper that Kenneth Richard at NoTricksZone found. The authors Hsu et al think the cooling trend has a natural explanation (but if it had been […]

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    […] Diagramme stammen aus einer Studie, die Kenneth Richard bei NoTricksZone gefunden hat. Die Autoren Hsu et al denken, dass der Abkühlungstrend eine natürliche Erklärung […]

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