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More Polar Bear Climate Porn: Bears Use 4X More Energy In Computer Models

by Susan Crockford, Ph.D.
March 02, 2021, 11:13 AM
in News and Opinion
Reading Time: 3 mins read
A A
5

arctic polar bear sea iceLast week (24 February 2021), The Guardian was promoting a study that claims polar bears now use four times more energy than expected to survive because of ‘major ice loss’ in the Arctic, as a way of suggesting that the animals are already on their way to extinction.

But like many papers of this type, this study by Anthony Pagano and Terri Williams (Pagano and Williams 2021) is yet another model describing what biologists think may be happening based on experimental data collected from individual bears, not a conclusion based on evidence collected from subpopulations with the worst amounts of ice loss.

This is actually a review paper: a summary of what is known about measured energy use by polar bears in lab or zoo contexts (i.e. experimental evidence) – not what happens to bears under a variety of circumstances in the real world on a regular basis.

What real-life evidence they use comes from studies on individual bears in the Southern Beaufort (Pagano et al. 2018; Whiteman 2018) in a year that thick spring ice made ringed seal pups scarce (and thus left some bears in less than ideal condition) or from studies of swimming SB bears (Pagano et al. 2012; Pilfold et al. 2016).

Such models depend entirely on assumptions that may not be appropriate to apply across the board.

To support their claim, the authors cite a paper published last year by Laidre and colleagues (Laidre et al. 2020) about an apparent decline in body condition and cub survival among the Baffin Bay polar bears that seemed to be correlated with declining summer sea ice, despite the fact that the study looked at no other possible factors except ice loss and that the population has been stable.

In addition, Laidre and colleagues included a rather important caveat for their study not mentioned in the Pagano and Williams paper:

“We note, however, that the functional and temporal relationships between declines in body condition and recruitment, and declines in subpopulation size, are poorly understood and that the trend of the BB subpopulation is currently unknown.”

More importantly, however, they ignore strongly contradictory evidence from the Chukchi and Barents Seas, hoping no one will check.

However, if their premise was true – that bears, in general, are using four times as much energy to survive because of sea ice loss – then polar bears in the Barents Sea should be almost gone due to starvation.

Barents Sea bears have been dealing with almost four times as much sea ice loss as those in the Baffin Bay (Regehr et al. 2016, see graphs below) and according to Pagano and Williams, should not have been in better condition in 2015 than they were before 2005: yet the evidence shows they were (Lippold et al. 2019).

Numerous studies have documented that Chukchi Sea bears are also thriving despite having had only slightly less summer ice loss than those in the Baffin Bay (AC SWG 2018; Crockford 2017, 2019; Regehr et al. 2018; Rode et al. 2014, 2015, 2018).

Polar bear specialists fail to mention such contradictions because they hope journalists and policymakers won’t notice: they hype the examples that fit their narrative and ignore or downplay the rest.

I’m here to call them out on that kind of subterfuge.


Dr. Susan Crockford is a zoologist (former adjunct professor, University of Victoria) specializing in Holocene mammals, including polar bears and walruses. Her latest book is called Upheaval. She also wrote the bestselling novel, The Polar Bear Catastrophe That Never Happened (Amazon).

Read rest at Polar Bear Science

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Comments 5

  1. Dave O says:
    5 years ago

    As always, climate alarmist have to choose the proof of their alarmism that is so remote and unverifiable so that the average person cannot possible question their hoax.

    Reply
  2. Gumnut says:
    5 years ago

    Four times the energy requirements is beyond the realm of short-term adaptability in any reasonable sense. If this were true, there’d be no polar bears to study.

    Modern ecology is often so far removed from actual knowledge of nature as to be laughable. As I’ve said before, those who think climate science is the worst sort of pseudo-science haven’t given enough attention to ecology. It is a hotbed of neo-Pagan Sun-panel worship that sees every species as threatened, except for ones they don’t like, such as cockroaches.

    Reply
    • Dave O says:
      5 years ago

      And humans.

      Reply
  3. Sonnyhill says:
    5 years ago

    The North American Indians would look at the top of the food chain, predators , as a measure of the health of the environment. If the polar bear population is growing, why worry about ice?
    The Inuit have a good business these days, selling their hunting tags to wealthy trophy hunters.
    The North adapts.

    Reply
  4. Chaamjamal says:
    5 years ago

    The assumption underlying the polar bear argument in climate science is that the observed sea ice loss is a creation of anthropogenic global warming (AGW) and therefore it can and must be attenuated by cutting fossil fuel emissions and that the claimed plight of the polar bear should serve to motivate us to give up fossil fuels.

    Yet, no evidence is provided to show the claimed causal connection between AGW and sea ice, possibly because no such evidence is found in the data.

    https://tambonthongchai.com/2020/07/30/record-arctic-sea-ice-melt/

    Reply

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