Editorial Type:
Article
Article Type:
Research Article

A Method of Detecting Change in the Ice Conditions of the Central Greenland Sea by the Whelping Locations of Harp Seals

J. P. Wilkinson Scottish Association for Marine Science, Oban, Argyll, United Kingdom

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P. Wadhams Scottish Association for Marine Science, Oban, Argyll, United Kingdom

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Print Publication:
15 Apr 2005
DOI:
https://doi.org/10.1175/JCLI3325.1
Page(s):
1216–1226
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Abstract

Variations in the extent of sea ice within the Greenland Sea on daily, seasonal, or longer time scales are well documented, while changes in ice conditions are not. By combining historical information on the location and timing of the hunt for the whelping harp seal (Phoca groenlandica) with the ice conditions needed for the seals to give birth, details of the types, concentration, and extent of ice within the central Greenland Sea in winter have been determined for the mid- to late nineteenth century. These in turn have been compared to ice extent and concentration from the passive microwave era, as well as ice types from field work in the region. Results suggest that the ice conditions in the central Greenland Sea in the mid- to late nineteenth century were significantly different from those witnessed in recent decades. These differences manifest themselves not only in the extent of ice, but in ice types, concentration, and longevity of the ice cover. It is hypothesized that these changes could be due to an increase in both air temperature and wave energy, which is consistent with an increase in the strength and frequency of southerly and easterly winds during winter.

* Current affiliation: Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge, United Kingdom

Corresponding author address: Dr. Jeremy P. Wilkinson, Scottish Association for Marine Science, Dunstaffnage Marine Laboratory, Oban, Argyll PA37 1JJ, United Kingdom. Email: jpw28@sams.ac.uk

Abstract

Variations in the extent of sea ice within the Greenland Sea on daily, seasonal, or longer time scales are well documented, while changes in ice conditions are not. By combining historical information on the location and timing of the hunt for the whelping harp seal (Phoca groenlandica) with the ice conditions needed for the seals to give birth, details of the types, concentration, and extent of ice within the central Greenland Sea in winter have been determined for the mid- to late nineteenth century. These in turn have been compared to ice extent and concentration from the passive microwave era, as well as ice types from field work in the region. Results suggest that the ice conditions in the central Greenland Sea in the mid- to late nineteenth century were significantly different from those witnessed in recent decades. These differences manifest themselves not only in the extent of ice, but in ice types, concentration, and longevity of the ice cover. It is hypothesized that these changes could be due to an increase in both air temperature and wave energy, which is consistent with an increase in the strength and frequency of southerly and easterly winds during winter.

* Current affiliation: Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge, United Kingdom

Corresponding author address: Dr. Jeremy P. Wilkinson, Scottish Association for Marine Science, Dunstaffnage Marine Laboratory, Oban, Argyll PA37 1JJ, United Kingdom. Email: jpw28@sams.ac.uk

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  • Ackley, S. F., P. Wadhams, J. C. Comiso, and A. Worby, 2003: Decadal decrease of Antarctic sea ice extent from whaling records revisited on the basis of historical and modern sea ice records. Polar Res., 22 , 10–25.

    • Search Google Scholar
    • Export Citation

  • Bacon, S., and D. J. T. Carter, 1991: Wave climate changes in the North Atlantic and the North Sea. Int. J. Climate, 11 , 545–558.

    • Search Google Scholar
    • Export Citation

  • Bonner, W. N., 1982: Seals and Man: A Study of Interactions. University of Washington Press, 170 pp.

  • Brown, R., 1868: Notes on the history and geographical relations of the Pinnipedia frequenting the Spitzbergan and Greenland Sea. Proc. Zool. Soc. London, 28 , 405–440.

    • Search Google Scholar
    • Export Citation

  • Carter, D. J. T., 1999: Variability and trends in the wave climate of the North Atlantic: A review. Proc. Ninth ISOPE Conf., Vol. 3, Cupertino, CA, ISOPE, 12–18.

  • Carter, D. J. T., and L. Draper, 1988: Has the northeast Atlantic become rougher? Nature, 332 , 494.

  • Comiso, J. C., P. Wadhams, L. T. Pedersen, and R. A. Gersten, 2001: Seasonal and interannual variability of the Odden ice tongue and a study of environmental effects. J. Geophys. Res., 106 , 9093–9116.

    • Search Google Scholar
    • Export Citation

  • de la Mare, W. K., 1997: Abrupt mid-twentieth-century decline in Antarctic sea-ice extent from whaling records. Nature, 389 , 87–90.

    • Search Google Scholar
    • Export Citation

  • Deser, C., J. E. Walsh, and M. S. Timlin, 2000: Arctic sea ice variability in the context of recent atmospheric circulation trends. J. Climate, 13 , 617–633.

    • Search Google Scholar
    • Export Citation

  • Dickson, R. R., J. Meincke, S. V-A. Malmberg, and A. J. Lee, 1988: The Great Salinity Anomaly in the northern North Atlantic 1968–82. Progress in Oceanography, Vol. 20, Pergamon, 103–151.

  • Estep, K. W., F. Macintyre, T. T. Noji, B. Stensholt, and T. Oritsland, 1994: Seal sizes and habitat conditions assessed from aerial photography and video analysis. J. Mar. Sci., 51 , 253–261.

    • Search Google Scholar
    • Export Citation

  • Gray, R. W., 1932: Whelping places of the Saddle or Harp Seal. Naturalist, June, 183–186.

  • Gray, R. W., 1942: Peterhead and the Greenland Sea:. Transactions of the Buchan Club, 1939–1942. Vol. 16, Observer Printing Works, 131 pp.

    • Search Google Scholar
    • Export Citation

  • Houghton, J. T., Y. Ding, D. J. Griggs, M. Noguer, P. J. van der Linden, X. Dai, K. Maskell, and C. A. Johnson, 2001: Climate Change 2001: The Scientific Basis. Cambridge University Press, 881 pp.

    • Search Google Scholar
    • Export Citation

  • Hurrell, J. W., 1996: Influence of variations in extratropical wintertime teleconnections on Northern Hemisphere temperatures. Geophys. Res. Lett., 23 , 665–668.

    • Search Google Scholar
    • Export Citation

  • Hurrell, J. W., and R. R. Dickson, 2004: Climate variability over the North Atlantic. Marine Ecosystems and Climate Variation: The North Atlantic, N. C. Stenseth et al., Eds., Oxford University Press, 15–31.

    • Search Google Scholar
    • Export Citation

  • Hurrell, J. W., Y. Kushnir, M. Visbeck, and G. Ottersen, 2003: An overview of the North Atlantic Oscillation. The North Atlantic Oscillation: Climate Significance and Environmental Impact Geophys. Monogr., No. 134, Amer. Geophys. Union, 1–35.

    • Search Google Scholar
    • Export Citation

  • Nansen, F., 1925: Hunting and Adventure in the Arctic. J. M. Dent, 462 pp.

  • Øristsland, T., and N. Øien, 1995: Arial surveys of harp and hooded seal pups in the Greenland Sea pack-ice. Whales, Seals, Fish and Man: Proceedings of the International Symposium on the Biology of Marine Mammals in the Northeast Atlantic, A. S. Blix, L. Walløe and Ø. Ulltang, Eds., Developments in Marine Biology, Vol. 4, Elsevier, 545–556.

    • Search Google Scholar
    • Export Citation

  • Rasmussen, B., 1957: Exploitation and protection of the East Greenland seal herds. Norwegian Whaling Gazette, No. 2, 45–59.

  • Schlosser, P., G. Boenisch, M. Rhein, and R. Bayer, 1991: Reduction of Greenland Sea deep-water formation during the 1980s: Evidence from tracer data. Science, 251 , 1054–1056.

    • Search Google Scholar
    • Export Citation

  • Scoresby Jr, W., 1820: An Account of the Arctic Regions. Vol. 1, Archibald Constable and Co., 551 pp.

  • Sergeant, D. E., 1991: Harp seals, man and ice. Canadian Special Publication of Fisheries and Aquatic Sciences 114, Department of Fisheries and Oceans, Ottawa, ON, Canada, 153 pp.

  • Shapiro, I., R. L. Colony, and T. Vinje, 2003: April sea ice extent in the Barents Sea, 1850–2001. Polar Res., 22 , 5–10.

  • Shuchman, R. A., E. G. Josberger, C. A. Russel, K. W. Fischer, O. M. Johannessen, J. Johannessen, and P. Gloersen, 1998: Greenland Sea Odden sea ice feature: Intra-annual and interannual variability. J. Geophys. Res., 103 , C6,. 12709–12724.

    • Search Google Scholar
    • Export Citation

  • Southwell, T., 1882: Seals and the seal fishery. Trans. Norf. Norw. Nat. Soc., 3 , 482–533.

  • Toudal, L., 1999: Ice extent in the Greenland Sea 1978–1995. Deep-Sea Res., 46B , 1237–1254.

  • Toudal, L., and M. Coon, 2004: A sea ice model for the marginal ice zone with an application to the Greenland Sea. J. Geophys. Res., 109 .C03008, doi:10.1029/2003JC001827.

    • Search Google Scholar
    • Export Citation

  • Vinje, T., 2001: Anomalies and trends of sea ice extent and atmosphere circulation in the Nordic Seas during the period 1864–1998. J. Climate, 14 , 255–267.

    • Search Google Scholar
    • Export Citation

  • Visbeck, M., J. Fischer, and F. Schott, 1995: Preconditioning the Greenland Sea for deep convection: Ice formation and ice drift. J. Geophys. Res., 100 , 18489–18502.

    • Search Google Scholar
    • Export Citation

  • Wadhams, P., 1999: The Odden ice tongue and Greenland Sea convection. Weather, 54 , 3,. 83–84. 91–98.

  • Wadhams, P., and J. P. Wilkinson, 1999: The physical properties of sea ice in the Odden ice tongue. Deep-Sea Res., 46B , 1275–1300.

    • Search Google Scholar
    • Export Citation

  • Wadhams, P., M. A. Lange, and S. F. Ackley, 1987: The ice thickness distribution across the Atlantic sector of the Antarctic ocean in midwinter. J. Geophys. Res., 92 , C13,. 14535–14552.

    • Search Google Scholar
    • Export Citation

  • Wang, X. L., F. W. Zwiers, and V. R. Swail, 2004: North Atlantic ocean wave climate change scenarios for the twenty-first century. J. Climate, 17 , 2368–2383.

    • Search Google Scholar
    • Export Citation

  • Wilkinson, J. P., and P. Wadhams, 2003: A salt flux model for salinity change through ice production in the Greenland Sea, and its relationship to winter convection. J. Geophys. Res., 108 .3147, doi:10.1029/2001JC001099.

    • Search Google Scholar
    • Export Citation

  • Wollebaek, A., 1907: Biologie der seehunde und die Seehundjagd in europaischen Eismeer. Rapp. P. V. Reun. Comm. Int. Explor. Sci. Mer. Mediterr., 8 , 109–119.

    • Search Google Scholar
    • Export Citation
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