New Study: The Post-Pause Global Warming After 2013 Was Not Caused By CO2, But Shortwave Radiation Forcing

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Echoing the determination of NASA scientists, a new study suggests the natural variability in cloud cover allowing more solar radiation to be absorbed by the Earth’s oceans drove the 2014-2020 global warming.

NASA scientists (Loeb et al., 2018) used satellite data to assess the 2014-2017 warming was driven by a +0.83 W/m² shortwave forcing due to the downward trend in cloud cover.

Image Source: Loeb et al., 2018

A new study (Ollila, 2020) affirms this analysis and suggests the 2018-2020 temperature changes can also be explained by shortwave cloud forcing.

“…the pause was over at the end of 2014, and the major cause was not the anthropogenic forcing, but it was the SW [shortwave] radiation forcing”

“Decreases in low cloud cover were the primary driver of the decrease in reflected SW…”

Image Source: Ollila, 2020
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4 responses to “New Study: The Post-Pause Global Warming After 2013 Was Not Caused By CO2, But Shortwave Radiation Forcing”

  1. John Culhane

    I see Deutsche Welle has published pro-wind puff piece mainly to sooth the bird chopping concerns.

    https://www.youtube.com/watch?v=Qr5PEAK1t3U

  2. RoHa

    But Man-Made CO2 caused the reduction in cloud cover.

    Somehow.

  3. Yonason

    I see that Bob Tisdale addressed the cloud cover issue 11 years ago. The source of the heat is the sun, which warms the water more when fewer clouds are present, consistent with the info Kenneth presents.
    https://bobtisdale.blogspot.com/2009/04/did-decrease-in-total-cloud-amount-fuel.html
    Unfortunately all of his illustrations reference dead links, which makes it harder to visualize the points he’s making.

    Another of his posts connecting El Niños with warming, which they are able to do by pulling the warmer water up and distributing it on the surface.
    https://bobtisdale.wordpress.com/2019/01/20/does-the-climate-science-industry-purposely-ignore-a-simple-aspect-of-strong-el-nino-events-that-causes-long-term-global-warming/

    A simple analysis of how El Niño works, but in good detail.
    https://bobtisdale.files.wordpress.com/2013/01/the-manmade-global-warming-challenge.pdf

  4. Weekly Climate and Energy News Roundup #420 | Watts Up With That?

    […] New Study: The Post-Pause Global Warming After 2013 Was Not Caused By CO2, But Shortwave Radiation F… […]

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