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The Cryosphere An interactive open-access journal of the European Geosciences Union
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Volume 10, issue 5
The Cryosphere, 10, 2027-2041, 2016
https://doi.org/10.5194/tc-10-2027-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
The Cryosphere, 10, 2027-2041, 2016
https://doi.org/10.5194/tc-10-2027-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 14 Sep 2016

Research article | 14 Sep 2016

Sea-ice indicators of polar bear habitat

Harry L. Stern and Kristin L. Laidre
Related subject area
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Cited articles
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Amstrup, S. C., Marcot, B. G., and Douglas, D. C.: A Bayesian network modeling approach to forecasting the 21st century worldwide status of polar bears, in: Arctic Sea Ice Decline: Observations, Projections, Mechanisms and Implications, edited by: DeWeaver, E. T., Bitz, C. M., and Tremblay, L. B., Geophysical Monograph Series 180, American Geophysical Union, Washington, DC, USA, 213–268, 2008.
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Blanchard, E., Armour, K. C., and Bitz, C. M.: Persistence and Inherent Predictability of Arctic Sea Ice in a GCM Ensemble and Observations, J. Climate, 24, 231–250, https://doi.org/10.1175/2010JCLI3775.1, 2011.
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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.
Polar bears, found in 19 distinct regions of the Arctic, depend on sea ice as a platform for...
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