Earth to USGS : How does the Hudson Bay bear population survive without sea ice for three months every year?
The overall conclusion of the USGS research effort is:
Projected changes in future sea ice conditions, if realized, will result in loss of approximately 2/3 of the world’s current polar bear population by the mid 21st century. Because the observed trajectory of Arctic sea ice decline appears to be underestimated by currently available models, this assessment of future polar bear status may be conservative.
They need to go back to studying geological features around the US and leave Biology to Biologists. Why is the USGS sticking their nose into Polar Bear population anyhow? What does that have to do with the height of mountains or how a river flows?
Two words: more funding.