Tag Archives: satellite images

Tracking polar bears in the Southern Beaufort, with a sea ice surprise – April 2015 map

USGS biologists were clearly busy this spring putting more satellite radio collars and glue-on tags on Southern Beaufort Sea polar bears but there’s some surprising information in their April 2015 tracking map about current sea ice conditions.

From the 2013-2014 issue of  “Polar Bear News” (USFWS).

From the 2013-2014 issue of “Polar Bear News” (USFWS).

What’s interesting is that the sea ice maps they use show less dark spots that might be open water this year than were present last year in late April. Oddly, this phenomenon has one prominent biologist worried about “challenging” polar bear habitat developing this year – without mentioning last year at all.

The USGS track map for April 2015 is copied below.1
Continue reading

Counting bears from space can be just as accurate as by helicopter, claims new study

Satellites images might be able to replace aerial counts of polar bears in some places — if there are no clouds. But it seldom distinguishes cubs and can’t tell males from females, found a 2012 study of Foxe Basin bears that’s just been published.

Foxe Basin polar_bears_rowley_island_Stapleton 2012 press photo labeled sm

Note: This is my 200th post since July 26, 2012!

Continue reading