Southern Beaufort Sea Polar Bear Habitat at the Summer Solstice is Above Average

from Polar Bear Science

Dr. Susan Crockford

Sea ice is well above recent levels for this time of year in the Southern Beaufort and only time will tell if that’s bad news for polar bears. Seals need the open water that early summer polynyas provide in order to feed and some polar bears make use of the hunting opportunities (Stirling and Cleator 1981; Stirling et al. 1981).

It’s been a decade since there was this little open water at the beginning of summer in the western North American Arctic, especially the Southern Beaufort. It’s looking unlikely there will be extensive open water until well into July, which may result in many fewer bears on shore in early summer. Recall that in July 2019, NOAA employees counted 31 fat, healthy bears onshore along the Alaska coast.

Past and Present conditions

The Cape Bathurst polynya in the Eastern Beaufort Sea west of Banks Island was usually prominent in May during the late 1970s (images below from Smith and Rigby 1981):

As you can see, this polynya was present in classic formation at May 15 this year:

However, by early June it had almost entirely re-frozen:

Now, at the first day of summer, the polynya is only just starting to open back up again and the ice surrounding it is thick multiyear ice (brown) and thick first year ice >1.2m (dark green):

The chart below shows there is more ice than usual in the Eastern Beaufort (blue):

The classic CIS chart shows what this looks like as ice coverage vs. open water:

Compare the above chart for this year (above) to previous years (below).

On or about the same date going back in time shows how unusual this situation is: there hasn’t been this little open water since 2013.

References

Stirling, I. and Cleator, H. (eds). 1981. Polynyas in the Canadian Arctic. Canadian Wildlife Service, Occasional Paper No. 45. Ottawa.

Smith, M. and Rigby, B. 1981. Distribution of polynyas in the Canadian Arctic. In: Polynyas in the Canadian Arctic, Stirling, I. and Cleator, H. (eds), pg. 7-28. Canadian Wildlife Service, Occasional Paper No. 45. Ottawa.

Stirling, I, Cleator, H. and Smith, T.G. 1981. Marine mammals. In: Polynyas in the Canadian Arctic, Stirling, I. and Cleator, H. (eds), pg. 45-58. Canadian Wildlife Service, Occasional Paper No. 45. Ottawa. Pdf of pertinent excerpts of above papers here.

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fretslider
June 26, 2022 10:28 am

The only polar bear disaster I can think of was in 2019…

“With the announcement of the planned closure of Leicester’s Fox’s Glacier Mint factory, the fate of the sweets’ iconic stuffed polar bear has come into question.

Peppy, short for peppermint, has been the face of Fox’s Glacier Mints since 1922.”

https://www.leicestermercury.co.uk/news/local-news/what-happened-peppy-foxs-glacier-2595309

Phil
June 26, 2022 12:45 pm

Might be worth annotating the third map, to show whereabouts the first the first two are located. I’m not familiar with the north of Canada, and it took me a while to work it out!

Ben Vorlich
June 26, 2022 1:07 pm

According to the DMI the Arctic Sea Ice is doing quite well so far this summer

DMI Arctic Sea Ice

DMI also says temperature below average

Arctic Temperatures

And Greenland gaining mass until yesterday

Greenland Surface Conditions

tommyboy
June 26, 2022 1:20 pm

Thank you for posting multiple Canadian ice maps, it very clearly shows the multi year melt and refreeze cycle of the last ten years. I imagine the 2022 polar bears will handle conditions about the same as the 2013 polar bears. How long do the bears generally live? Are some of them experiencing extensive pack ice for the second time?

Derg
Reply to  tommyboy
June 26, 2022 1:57 pm

Yeah but this new ice is not as good 😉

Vuk
June 26, 2022 1:36 pm

WWF needs to send few nutrition experts to the Arctic region.
Polar bears one year go on starvation diet and the next gorging themselves to obesity.
Occasionally feeding on a WWF expert might bring to balance the polar bears annual dietary oscillations
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Last edited 1 month ago by Vuk
Mr.
Reply to  Vuk
June 26, 2022 1:54 pm

That’s David Attenborough in a bear suit?

Dnalor50
Reply to  Vuk
June 26, 2022 3:19 pm

Perhaps most polar bears become emaciated as they get closer to the end of life given the dearth of aged care facilities. Just photograph the oldies if your aim is to promote the climate crisis.

Gary Meyers
June 26, 2022 4:28 pm

I thought that the problem for Polar Bears was too little ice!

William Grubel
June 26, 2022 4:54 pm

I am so confused. I thought low ice was bad for the bears. Now more ice is bad? Did I miss a /sarc tag? Did I misread the article? Is there anybody out there that doesn’t have their head shoved up their agenda hole?

Call me a skeptic
Reply to  William Grubel
June 27, 2022 11:46 am

Too much ice, climate change.
Too little ice , climate change. It is just amazing what the magic CO2 gas can do. For it’s next trick……fill in the blanks.

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