Late Quaternary climatic changes around the Elephant Islands, Antarctic Peninsula
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- Late Quaternary climatic changes around the Elephant Islands, Antarctic Peninsula
- Bak, Young-Suk
Yoon, Ho Il
- Antarctic Peninsula; Elephant Island; Quaternary; Diatom assemblage; Reworked species
- Issue Date
- Bak, Young-Suk, Kyu-Cheul Yoo, and Ho Il Yoon. 2014. Late Quaternary climatic changes around the Elephant Islands, Antarctic Peninsula. Geosciences Journal, 18(4): 495-501.
- Sixty-seven species of diatoms of 28 genera were identified in Core GC03-C2 acquired from the north slope of Elephant Island, Antarctic Peninsula. The number of diatom valves per gram of dry sediment ranged from 0.2~17.3 × 107g-1, and these were dominated by Fragilariopsis kerguelensis (65.8%). Diatom assemblage analysis reconstructed the Quaternary paleoclimatic change the Elephant Islands. Four diatom assemblage zones were identified according to the frequency of critical taxa as follows: zone I, from 830 to 710 cm (Antarctic Cold Reversal); zone II, from 700 to 550 cm (Deglaciation zone); zone III, from 540 to 260 cm (warm period; Holocene); and zone IV, from 250 to 0 cm (cool period;
Holocene). The high abundance of reworked species includes Actinocyclus ingens, Denticulopsis hustedtii, D. praedimorpha, and D. dimorpha appeared in Zone I by turbidity currents and ice rafting in the area during the glaciations-deglaciation event.
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