Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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A Study on High-Resolution Seasonal Variations of Major Ionic Species in Recent Snow Near the Antarctic Jang Bogo Station

남극 장보고과학기지 인근에서 채취한 눈시료 내의 주요 이온성분들의 고해상도 계절변동성 연구

  • Kwak, Hoje (Department of Ocean Sciences, College of Natural Sciences, Inha University) ;
  • Kang, Jung-Ho (Korea Polar Research Institute, KIOST) ;
  • Hong, Sang-Bum (Korea Polar Research Institute, KIOST) ;
  • Lee, Jeonghoon (Department of Science Education, College of Education, Ewha Womans University) ;
  • Chang, Chaewon (Department of Ocean Sciences, College of Natural Sciences, Inha University) ;
  • Hur, Soon Do (Korea Polar Research Institute, KIOST) ;
  • Hong, Sungmin (Department of Ocean Sciences, College of Natural Sciences, Inha University)
  • 곽호제 (인하대학교 자연과학대학 해양과학과) ;
  • 강정호 (한국해양과학기술원 부설 극지연구소) ;
  • 홍상범 (한국해양과학기술원 부설 극지연구소) ;
  • 이정훈 (이화여자대학교 사범대학 과학교육과) ;
  • 장채원 (인하대학교 자연과학대학 해양과학과) ;
  • 허순도 (한국해양과학기술원 부설 극지연구소) ;
  • 홍성민 (인하대학교 자연과학대학 해양과학과)
  • Received : 2014.11.17
  • Accepted : 2015.04.16
  • Published : 2015.06.30
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Abstract

A continuous series of 60 snow samples was collected at a 2.5-cm interval from a 1.5-m snow pit at a site on the Styx Glacier Plateau in Victoria Land, Antarctica, during the 2011/2012 austral summer season. Various chemical components (${\delta}D$, ${\delta}^{18}O$, $Na^+$, $K^+$, $Mg^{2+}$, $Ca^{2+}$, $Cl^-$, $SO_4{^2-}$, $NO_3{^-}$, $F^-$, $CH_3SO_3{^-}$, $CH_3CO_2{^-}$ and $HCO_2{^-}$) were determined to understand the highly resolved seasonal variations of these species in the coastal atmosphere near the Antarctic Jang Bogo station. Based on vertical profiles of ${\delta}^{18}O$, $NO_3{^-}$and MSA, which showed prominent seasonal changes in concentrations, the snow samples were dated to cover the time period from 2009 austral winter to 2012 austral summer with a mean accumulation rate of $226kgH_2Om^{-2}yr^{-1}$. Our snow profiles show pronounced seasonal variations for all the measured chemical species with a different pattern between different species. The distinctive feature of the occurrence patterns of the seasonal variations is clearly linked to changes in the relative strength of contributions from various natural sources (sea salt spray, volcanoes, crust-derived dust, and marine biogenic activities) during different short-term periods. The results allow us to understand the transport pathways and input mechanisms for each species and provide valuable information that will be useful for investigating long-term (decades to century scale periods) climate and environmental changes that can be deduced from an ice core to be retrieved from the Styx Glacier Plateau in the near future.

Keywords

References

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