Ocean and Polar Research

  • 제26권1호
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  • Pages.1-10
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  • 2004
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  • 1598-141X(pISSN)
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  • 2234-7313(eISSN)
한국해양과학기술원 (Korea Institute of Ocean Science & Technology)
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세종기지 주변에서 관찰된 빙벽 후퇴와 바다 결빙

Ice cliff retreat and sea-ice formation observed around King Sejong Station in King George Island, West Antarctica

  • 정호성 (한국해양연구원 극지연구소) ;
  • 이방용 (한국해양연구원 극지연구소) ;
  • 장순근 (한국해양연구원 극지연구소) ;
  • 김지희 (한국해양연구원 극지연구소) ;
  • 김예동 (한국해양연구원 극지연구소)
  • 발행 : 2004.03.31
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초록

Ice cliff retreat and sea-ice formation around King Sejong Station in King George Island were analysed and compared with air temperature change. Analysis of 33-year (1969-2001) air temperature records at Bellingshausen Station has revealed regional atmospheric warming, and the increasing rate of air temperature Is equivalent to a warming of $1^{\circ}C$ for 27-year period. Here we present time-series of observations for the areal extent of the ice cliff and ice sheet, showing that they have retreated dramatically in the past 45 years (1956-2001). Retreat of 1,050 m in length of the ice clifr has changed the Marian Cove into a low rectangular form of 4 km in length and 1 to 1.3km in width. The retreat rates have since increased from 6 m/yr of the Primary investigated Period to 54 and 81m/yr in the recent years. Exceptionally, the ice cliff had been advanced of 21m in length for a year between 1987 and 1988 of cold winters. Ice sheet in King George Island also shows a similar decrease, and the decreasing extent is much larger at the southern part of the Main Cove, relatively more exposed to the sun, than at the northern part. Comparing sea-ice formation in winter with air temperature data shows a pattern starting to freeze below $-5^{\circ}C$ and to thaw over $-3^{\circ}C$. It is conclusively estimated that the patterns and magnitudes of ice cliff retreat and sea-ice formation are consistent with fluctuations of the air temperature, and that the recent rapid retreat of ice cliff and less formation of sea-ice are caused especially by the warming trends in autumn accompanied with expansion of summer thawing period.

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참고문헌

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피인용 문헌

  1. Simulation of a tidewater glacier evolution in Marian Cove, King George Island, Antarctica vol.12, pp.1, 2008, https://doi.org/10.1007/s12303-008-0005-x
  2. Polar gravel beach-ridge systems: Sedimentary architecture, genesis, and implications for climate reconstructions (South Shetland Islands/Western Antarctic Peninsula) vol.221, 2014, https://doi.org/10.1016/j.geomorph.2014.06.013
  3. Spectral Discrimination of Vegetation Classes in Ice-Free Areas of Antarctica vol.8, pp.10, 2016, https://doi.org/10.3390/rs8100856
  4. Distribution Pattern of Deschampsia antarctica, a Flowering Plant Newly Colonized around King Sejong Station in Antarctica vol.26, pp.1, 2004, https://doi.org/10.4217/OPR.2004.26.1.023
  5. Vegetation of Barton Peninsula in the neighbourhood of King Sejong Station (King George Island, maritime Antarctic) vol.30, pp.7, 2007, https://doi.org/10.1007/s00300-006-0250-2
  6. Thermal characteristics of soil and water during summer at King Sejong Station, King George Island, Antarctica vol.20, pp.4, 2016, https://doi.org/10.1007/s12303-016-0026-9
  7. Long-term Variation of the Freezing Climate near the Han River and Seoul in Korea vol.32, pp.7, 2011, https://doi.org/10.5467/JKESS.2011.32.7.761
  8. Vegetation abundance on the Barton Peninsula, Antarctica: estimation from high-resolution satellite images vol.37, pp.11, 2014, https://doi.org/10.1007/s00300-014-1543-5
  9. Assembly processes of moss and lichen community with snow melting at the coastal region of the Barton Peninsula, maritime Antarctic vol.40, pp.1, 2016, https://doi.org/10.1186/s41610-016-0008-x
  10. The Community Structure of Meiofauna in Marian Cove, King George Island, Antarctica vol.33, pp.3, 2011, https://doi.org/10.4217/OPR.2011.33.3.265