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Holocene paleoceanography of Bigo Bay, west Antarctic Peninsula: Connections between surface water productivity and nutrient utilization and its implication for surface-deep water mass exchange

Cited 7 time in wos
Cited 7 time in scopus
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Title
Holocene paleoceanography of Bigo Bay, west Antarctic Peninsula: Connections between surface water productivity and nutrient utilization and its implication for surface-deep water mass exchange
Other Titles
서남극반도 비고만의 홀로세 고해양학적 변화: 표층생산성과 영양염 이용률의 관계와 표층-심층 해수 순환에의 의의
Authors
Kim, Sung-Han
Yoo, Kyu-Cheul
Lee, Jae Il
Khim, Boo-Keun
Bak, Young-Suk
Lee, Min Kyung
Lee, Jongmin
Domack, Eugene W.
Christ, Andrew J.
Yoon, Ho Il
Subject
Geography, Physical; Geosciences, Multidisciplinary
Keywords
Holocene; Paleoceanography; West Antarctic Peninsula; Marine core; Geochemistry; Nutrient utilization
Issue Date
2018-07
Citation
Kim, Sung-Han, et al. 2018. "Holocene paleoceanography of Bigo Bay, west Antarctic Peninsula: Connections between surface water productivity and nutrient utilization and its implication for surface-deep water mass exchange". QUATERNARY SCIENCE REVIEWS, 192(1): 59-70.
Abstract
Paleoceanographic changes in response to Holocene climate variability in Bigo Bay, west Antarctic Peninsula (WAP) were reconstructed through geochemical, isotopic, sedimentological, and microfossil analysis. Core WAP13-GC47 is composed of 4 lithologic units. Unit 4 was deposited under ice shelf settings. Unit 3 represents the mid-Holocene open marine conditions. Unit 2 indicates lateral sediment transport by a glacier advance during the Neoglacial period. The chronological contrast between the timing of open marine conditions at core WAP13-GC47 (ca. 7060 cal. yr BP at 540cm) and the ages of calcareous shell fragments (ca. 8500 cal. yr BP) in Unit 2b suggests sediment reworking during the Neoglacial period. Unit 1 was deposited during the Medieval Warm Period (MWP) and the Little Ice Age (LIA). Surface water productivity, represented by biogenic opal and total organic carbon (TOC) concentrations, increased and bulk δ15N decreased during the warmer early to middle Holocene and the MWP. In contrast, surface water productivity decreased with increased bulk δ15N (nitrate utilization) during the colder Neoglacial period and LIA in Bigo Bay. The nitrate utilization was enhanced during cold periods in association with strong surface water stratification resulting from increased sea ice meltwater discharge or proximity to an ice shelf calving front in Bigo Bay. Reduced nitrate utilization during warm periods is related to weak stratification induced by less sea ice meltwater input and stronger Circumpolar Deep Water influence.
URI
https://repository.kopri.re.kr/handle/201206/10842
DOI
http://dx.doi.org/10.1016/j.quascirev.2018.05.028
Appears in Collections  
2018-2018, Reconstruction of Antarctic ice sheet and ocean history for the past two million years using sediment records (18-18) / Lee, Jae Il (PE18030)
2017-2018, Reconstruction of Antarctic ice sheet and ocean history for the past two million years using sediment records (17-18) / Lee, Min Kyung; Lee, Jae Il (PE17030; PE18030)
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