The Cryosphere
The Cryosphere
TC
Articles | Volume 10, issue 5
Articles | Volume 10, issue 5
https://doi.org/10.5194/tc-10-2027-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/tc-10-2027-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 10, issue 5
Research article
 | 
14 Sep 2016
Research article |  | 14 Sep 2016

Sea-ice indicators of polar bear habitat

Harry L. Stern and Kristin L. Laidre

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Short summary
Polar bears, found in 19 distinct regions of the Arctic, depend on sea ice as a platform for hunting. Using satellite data of sea ice for the period 1979–2014, we found that the date of sea-ice retreat in spring is arriving weeks earlier, and the date of sea-ice advance in fall is arriving weeks later, in all 19 regions. We calculated several other measures of sea ice, which all show declines. These measures were designed to be useful for management agencies to assess polar bear habitat.
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