New Papers Document No Warming Trend In Antarctica

  • Date: 28/03/17
  • Kenneth Richard, No Tricks Zone

For several decades now, Antarctica has not been cooperating with the “global” warming narrative, as the continent as a whole has not been warming.

Antarctica-UAH-1979-2016
Image Source: State of the Climate, 2016

Several scientific papers have been published recently that document the lack of an anthropogenic warming signal for the Antarctic continent or the surrounding ocean, as well as the dominance of natural variability.

Smith and Polvani (2016) concluded that warming of West Antarctica or the Antarctic Peninsula are predominantly natural.

“[We] conclude that there is little evidence of anthropogenic SAM-induced driving of the recent temperature trends … compelling evidence pointing to natural climate variability as a key contributor to the recent warming of West Antarctica and of the Peninsula.

Turner et al., 2016, in a paper entitled “Absence of 21st century warming on Antarctic Peninsula consistent with natural variability,” documented a significant cooling trend for the Antarctic Peninsula since the late 1990s.

The annual mean temperature has decreased at a statistically significant rate, with the most rapid cooling during the Austral summer.”

Jones et al. (2016) concluded that (a) there has been no overall warming trend for large portions of the continent in the past few hundred years, (b) the Southern Ocean has been cooling since 1979, and that (c), because of the cooling ocean, sea ice extent has been advancing.  In other words, climate models that assume humans drive Antarctic climate are “not compatible with the observed trends.”

“Most observed trends [over the 36-year satellite data] are not unusual when compared with Antarctic palaeoclimate records of the past two centuries.  … [C]limate model simulations that include anthropogenic forcing are not compatible with the observed trends. This suggests that natural variability overwhelms the forced response in the observations“

A 2,000-Year Cooling Trend For Antarctica, Uninterrupted By Rising CO2 Levels

Scientific documentation of the dominance of natural variability — and a glaring lack of an anthropogenic forcing signal for Antarctica — continues in 2017.

The PAGES 2k reconstruction crew has just published a comprehensive analysis of the surface temperature trends for the entire continent of Antarctica.  The results do not advance the “global” warming narrative.  Instead, over 20 contributing scientists find that modern Antarctic temperatures are still much colder than they were during first millennium, and the long-term cooling trend has not been reversed on a continent-wide scale even with the onset of an assumed anthropogenic influence within the last century.

In other words, natural variability is the dominant factor influencing the Antarctic climate, not anthropogenic CO2 emissions.

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