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

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

via NoTricksZone

August 17, 2020 at 04:47AM

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