Chronological characteristics for snow accumulation on Styx Glacier in northern Victoria Land, Antarctica
- 주제(키워드) Annual layer counting , ionic species , snow accumulation , stable water isotopes , Styx Glacier
- 등재 SCIE, SCOPUS
- 발행기관 Cambridge University Press
- 발행년도 2020
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000174856
- 본문언어 영어
- Published As http://dx.doi.org/10.1017/jog.2020.53
초록/요약
Under the potential to reconstruct the past climatic and atmospheric conditions from a deep ice core in the coastal Antarctic site (Styx Glacier), an 8.84 m long firn core (73°50.975′ S, 163°41.640′ E; 1623 m a.s.l.) was initially studied to propose a reliable age scale for the local estimation of snow accumulation rate. The seasonal variations of δ18O, methanesulfonic acid (MSA) and non-sea-salt sulfate (nssSO42-) were used for the firn core dating and revealed 25 annual peaks (from 1990 to 2014) with volcanic sulfate signal. The observed declining trend in annual accumulation rate with a mean value of 146 ± 60 kg m-2 a-1 is likely to be linked to the changes of sea-ice extent in the Ross Sea region. Moreover, the temporal variation of the annual mean δ18O, an annual flux of MSA and nssSO42- also likely to be under the influence of ice-covered and open water area. This study suggests a potential to recover past changes in an oceanic environment and will be useful for the interpretation of the long ice core drilled at the same site. Copyright © The Author(s), 2020. Published by Cambridge University Press.
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