Posted onJune 23, 2022|Comments Off on Southern Beaufort Sea polar bear habitat at the summer solstice is above average
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.
Posted onJune 11, 2016|Comments Off on Ice maps vs. observations in the W. Arctic – polar bear habitat reality check
Last Wednesday (8 June 2016), the US Coast Guard rescued walrus hunters from Shishmaref in the Bering Strait who got stuck in sea ice that is barely visible on sea ice maps. It’s a rare glimpse of what sea ice really looks like up close compared to what you see on the ice maps.
[Unfortunately, the screencaps from the video, like the one below, are less impressive than the film. In the video, you can see the hunters walking on the ice around their trapped boat – the ice does not visibly move]
Have a look at the sea ice maps below for the day the incident took place. They show what appears to be hardly any ice in the area.
This is a good lesson for assessing what’s been going on in the Beaufort Sea a bit further east, where winds and currents have opened up a rather large patch of open water surrounded by considerable expanses of sea ice – at issue is the possible impact on polar bear spring feeding for April and May. Continue reading
Comments Off on Ice maps vs. observations in the W. Arctic – polar bear habitat reality check
Posted onDecember 26, 2014|Comments Off on 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.