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Diatom assemblages from core sediments in the western sea area of the South Orkney Islands, Antarctica

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Title
Diatom assemblages from core sediments in the western sea area of the South Orkney Islands, Antarctica
Other Titles
남극 사우스 오크니 제도 서부 해역의 코어 퇴적물에서 산출된 규조 군집
Authors
Lee, Jong-Deock
Bak, Young-Suk
Lee, Jae Il
Yoon, Ho Il
Subject
Geology
Keywords
South Orkney Islands; diatom assemblage zone; sea-ice species; open water speciesUniversity; Jeonju; 561-756; Korea; Ho Il Yon and Jae Il Lee; Korea Polar Research Institute; Songdo Techno Park; 7-50 Songdo-dong; Yeonsu-gu; Incheon 406-840; Korea)
Issue Date
2007
Citation
Lee, Jong-Deock, et al. 2007. "Diatom assemblages from core sediments in the western sea area of the South Orkney Islands, Antarctica". The Geological Society Of Korea, 43(1): 33-42.
Abstract
Holocene paleoenvironmental history in the western South Orkney Islands was reconstructedthrough the paleoecological analysis on the diatom taxa from sediment core GC02-SOI03. Thre diatom zones are identified on the basis of frequency of the critical taxa throughout the section: diatom assemblage zone I (533 cm∼360 cm), diatom assemblage zone II (352 cm∼240 cm), and diatom assemblage zone III (232 cm∼0 cm). High concentration of open water species and Eucampia antarctica var. antarctica in the diatom assemblage zone I indicates open water environment with little sea-ice during the early Holocene. Sea-ice species and Eucampia antarctica var. recta increase in abundance in the diatom assemblage zone II, suggesting increased sea-ice cover in the study area since 5 ka. Even more extensive sea-ice coverage during the late Holocene is implied by abundant sea-ice species and decreased Corethron criophilum in the diatom assemblage zone III.
URI
http://repository.kopri.re.kr/handle/201206/6645
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