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Volume 10, issue 5 | Copyright
The Cryosphere, 10, 2027-2041, 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
Sea Ice
Reflective properties of melt ponds on sea ice
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The Cryosphere, 12, 1921-1937,,, 2018
Improving Met Office seasonal forecasts of Arctic sea ice using assimilation of CryoSat-2 thickness
Edward W. Blockley and K. Andrew Peterson
The Cryosphere Discuss.,,, 2018
Revised manuscript accepted for TC
The color of melt ponds on Arctic sea ice
Peng Lu, Matti Leppäranta, Bin Cheng, Zhijun Li, Larysa Istomina, and Georg Heygster
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On the retrieval of sea ice thickness and snow depth using concurrent laser altimetry and L-band remote sensing data
Lu Zhou, Shiming Xu, Jiping Liu, and Bin Wang
The Cryosphere, 12, 993-1012,,, 2018
A network model for characterizing brine channels in sea ice
Ross M. Lieblappen, Deip D. Kumar, Scott D. Pauls, and Rachel W. Obbard
The Cryosphere, 12, 1013-1026,,, 2018
Cited articles
Amante, C. and Eakins, B. W.: ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis, NOAA Technical Memorandum NESDIS NGDC-24, National Geophysical Data Center, NOAA,, 2009.
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.
Barnhart, K. R., Miller, C. R., Overeem, I., and Kay, J. E.: Mapping the future expansion of Arctic open water, Nature Climate Change, 6, 280–285,, 2015.
Belchansky, G. I., Douglas, D. C., and Platonov, N. G.: Duration of the Arctic Sea Ice Melt Season: Regional and Interannual Variability, 1979–2001, J. Climate, 17, 67–80, 2004.
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,, 2011.
Publications Copernicus
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...