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Holocene Palaeoenvironmental and Palaeoproductivity Changes in the Western Amundsen Sea Embayment of Antarctica

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dc.contributor.authorKim Minkyoung-
dc.contributor.authorLee, Jae Il-
dc.contributor.authorBak Young-Suk-
dc.contributor.authorHillenbrand Claus-Dieter-
dc.contributor.authorYang, Eun Jin-
dc.contributor.authorMontlucon Daniel B.-
dc.contributor.authorHaghipour Negar-
dc.contributor.authorEglinton Timothy I.-
dc.contributor.authorHwang Jeomshik-
dc.date.accessioned2023-12-06T16:38:09Z-
dc.date.available2023-12-06T16:38:09Z-
dc.date.issued2023-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/14883-
dc.description.abstractThe Amundsen Polynya (AP) on the inner and middle continental shelf of the western Amundsen Sea Embayment is the fourth largest coastal polynya around Antarctica. The AP is highly productive when it opens in austral summer, with similar to 20 times greater organic carbon accumulation rates over the last few thousand years compared to those at nearby shelf sites with more persistent seasonal sea-ice cover. We examined sedimentary records at a site from the AP and another site from the outer shelf to investigate temporal variations in the depositional environment with a special focus on the timing of the AP opening since the deglaciation following the Last Glacial Maximum (LGM; ca. 23-19 cal. ka BP). In the AP region, sedimentological and biogeochemical proxy data reveal a transition from a sub-glacial to a sub-ice shelf and then seasonally open marine conditions comparable to those at present. Total organic carbon contents and diatom valve abundances during the seasonally open marine period imply that the polynya environments was reached at ca. 9.2 cal. ka BP. Since the post-LGM deglaciation, diatom productivity and assemblages in the AP region appear to have varied in association with the variation in the physical environment. Compared to the AP site, only small amounts of organic carbon accumulated on the outer shelf. Differences in the depositional environments and productivity modes between the inner and outer shelf sites have persisted since ca. 10.5 cal. ka BP.-
dc.languageEnglish-
dc.subject.classificationAraon-
dc.titleHolocene Palaeoenvironmental and Palaeoproductivity Changes in the Western Amundsen Sea Embayment of Antarctica-
dc.title.alternative남극 서부 아문젠해만의 홀로세 고환경 및 고생산성 변화-
dc.typeArticle-
dc.identifier.bibliographicCitationKim Minkyoung, et al. 2023. "Holocene Palaeoenvironmental and Palaeoproductivity Changes in the Western Amundsen Sea Embayment of Antarctica". <em>JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS</em>, 128(6): 1-14.-
dc.citation.titleJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS-
dc.citation.volume128-
dc.citation.number6-
dc.identifier.doi10.1029/2023JC019797-
dc.citation.startPage1-
dc.citation.endPage14-
dc.description.articleClassificationSCIE-
dc.description.jcrRateJCR 2021:18.182-
dc.subject.keywordAmundsen Sea-
dc.subject.keywordHolocene-
dc.subject.keywordpalaeoenvironment-
dc.subject.keywordpalaeoproductivity-
dc.subject.keywordpolynya-
dc.identifier.localId2023-0100-
Appears in Collections  
2023-2023, Ice sheet retreat and ocean circulation in West Antarctica during the past warm periods (23-23) / Yoo, Kyu-Cheul (PE23090)
2023-2023, 2023년도 국내 학·연 극지연구 진흥프로그램(PAP사업) 총괄 (23-23) / Shin, Hyoung Chul (PE23900)
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