globalchange  > 气候减缓与适应
DOI: 10.1016/j.quascirev.2018.05.028
Scopus记录号: 2-s2.0-85047755789
论文题名:
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
作者: Kim S.; Yoo K.-C.; Lee J.I.; Khim B.-K.; Bak Y.-S.; Lee M.K.; Lee J.; Domack E.W.; Christ A.J.; Yoon H.I.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 192
起始页码: 59
结束页码: 70
语种: 英语
英文关键词: Geochemistry ; Holocene ; Marine core ; Nutrient utilization ; Paleoceanography ; West Antarctic Peninsula
Scopus关键词: Discharge (fluid mechanics) ; Geochemistry ; Nitrates ; Nutrients ; Oceanography ; Organic carbon ; Productivity ; Sea ice ; Sediment transport ; Antarctic Peninsula ; Holocenes ; Marine cores ; Nutrient utilization ; Paleoceanography ; Surface waters ; biological production ; geochemistry ; Holocene ; iceberg calving ; lithology ; Little Ice Age ; Medieval Warm Period ; meltwater ; Neoglacial ; nutrient use ; paleoceanography ; paleoclimate ; sediment transport ; stratification ; surface water ; water exchange ; water mass ; Antarctic Peninsula ; Antarctica ; West Antarctica
英文摘要: 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 540 cm) 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 (nitrate utilization) decreased during the warmer early to middle Holocene and the MWP. In contrast, surface water productivity decreased with increased bulk δ15N 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. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112141
Appears in Collections:气候减缓与适应

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作者单位: Korea Polar Research Institute, Incheon, 21990, South Korea; Department of Oceanography, Pusan National University, Busan, 46241, South Korea; Department of Earth and Environmental Sciences, Chonbuk National University, Jeonju, 54896, South Korea; College of Marine Science, University of South Florida, Tampa, FL 33620, United States; Department of Earth & Environment, Boston University, Boston, MA 02115, United States

Recommended Citation:
Kim S.,Yoo K.-C.,Lee J.I.,et al. 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[J]. Quaternary Science Reviews,2018-01-01,192
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