Regehr et al. 2016 model guarantees that polar bears will decline

“The real story has been the extent to which polar bears have managed to mitigate the demographic effects of sea ice loss so far. In retrospect this is perhaps not so surprising because polar bears have been around since the Pliocene which means they have persisted through not only glacial cycles, but also through all the natural climate cycles during the glacial periods and interglacial periods.” click here

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