Tag Archives: ice extent

Four years of PolarBearScience and polar bear habitat for ‘Christmas in July’

The traditional gift for a 4th anniversary is flowers, so to celebrate 4 years of blogging at PolarBearScience, I’m highlighting a CBC article from last year that featured the work of photographer Dennis Fast, who captured some fantastic images of polar bears cavorting in a field of fireweed near Churchill (see screencap below from the 2015 CBC feature, more at the DailyMail for 21 August 2015). Great photography – it deserves another look.

Churchill pbs in wildflowers_CBC feature_August 2015

Hard to imagine that four years have passed! Cheers to Hilary Ostrov (who blogs at The view from here) for getting me over my initial frustrations with WordPress – without which I’d never have made it this far – and for her much-appreciated typo alerts [Hilary is still dealing with on-going health issues but we talk on the phone from time to time.]

And thanks of course to my readers, who’ve made it all worthwhile. I truly appreciate all your tips and feedback. The word is getting out, via tweets and retweets, reblogging, personal blog and Facebook discussions, as well as links back to particular posts in the comments of news articles and other internet content, and straight up media mentions. The sum of it all has brought us to this point: 495 posts, over 764,000 views, and more than 411,000 visitors. Not too shabby for a single issue science blog, eh?

I thought of adding a Tip Jar button for next year, but decided against it – instead, if you’d like to support my efforts here, you can buy my polar bear attack novel (give it as a gift if you’re not keen on this type of fiction). I’d be just as grateful. See the sidebar for the link.

But back to business – below find sea ice maps of polar bear habitat at 25 July (‘Christmas in July’), this year as well as some previous years.
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Polar bear habitat – more Arctic sea ice in Canada this week than in early 1970s

This week, Arctic sea ice in Canada, where 2/3 of the world’s polar bears live, had more sea ice than was present in the early 1970s. Globally, the ice is spitting-distance close to the 1981-2010 average calculated by the NSIDC for this date – which means lots of winter/spring hunting habitat for polar bears.

Canada sea ice freeze-up_same week_Dec 25 1971_2014 standard average

This is the peak of the polar bear birthing season (both in the wild and in zoos.) Newborns will be snug in maternity dens built by their mothers onshore or on the sea ice; the rest of the population will be out on the ice.

Sea ice extent 2014 Dec 25 NSIDC

Regional ice charts going back to the late 1960s and early 1970s for this week show even more surprises — have a look.

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Hudson Bay sea ice above average for this date – more good news for polar bears

It’s only the 4th of December and Hudson Bay ice formation is way up over late 2000s coverage for this date — and higher than 2012, which had the lowest overall September ice extent for the Arctic since 1978.

Hudson Bay freeze-up same week_Dec 4 1971_2014 w average

This means boom times for Western and Southern Hudson Bay polar bears as sea ice formation is several days to a week ahead of last year. And as I mentioned in my last post, average November ice coverage across the Arctic this year was higher than 2003. Don’t forget that 2/3’s of the world’s polar bears live in Canada (see recent status update here; map below).

Figure 4. The Davis Strait (DS) subpopulation region runs from just below the Arctic Circle at the north end to at least 470N in the south. About half of DS lays at the same latitude as Western Hudson Bay (WH). Courtesy Environment Canada.

Polar bear population status in Canada. Courtesy Environment Canada.

More maps and charts below.
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Hudson Bay freeze-up: way more ice for this day than in 2013

On this day (20 November 2014), there is way more sea ice over Hudson Bay and Foxe Basin than 2013, with ice starting to form in Hudson Strait.

The polar bears of Hudson Bay are on the ice (except pregnant females, who will be in their dens); Churchill polar bear season is over (see previous discussions here and here).

Ice maps and graph courtesy Canadian Ice Service.

Sea ice extent Canada 2014 Nov 20 CIS
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