ANCHORAGE, Alaska — Greenhouse gas emissions remain the primary threat to the preservation of polar bear populations worldwide. This conclusion holds true under both a reduced greenhouse gas emission scenario that stabilizes climate warming and another scenario where emissions and warming continue at the current pace, according to updated U.S. Geological Survey research models. (more…)
Tag Archives: sea ice loss
The Arctic Ocean has more open water each summer, a trend most scientists predict will continue in coming years. September 2012 set the record for the most open water since satellite observations began.
Led by corresponding author Eric Post, a biologist at Pennsylvania State University, the international team looked at effects on animals ranging from microorganisms to polar bears. As well as obvious changes for organisms that live in or on the ice, there also are trickle-down effects for food webs, animal behavior, species ranges, interbreeding and disease dynamics. (more…)
Projected Losses of Arctic Sea-Ice and Polar Bear Habitat may be Reduced if Greenhouse Gas Emissions are Stabilized
ANCHORAGE, Alaska – Sea-ice habitats essential to polar bears would likely respond positively should more curbs be placed on global greenhouse gas emissions, according to a new modeling study published in the journal, Nature.
The study, led by the U.S. Geological Survey, included university and other federal agency scientists. The research broke new ground in the “tipping point” debate in the scientific community by providing evidence that during this century there does not seem to be a tipping point at which sea-ice loss would become irreversible. (more…)