DOI: 10.1016/j.quascirev.2015.08.007
Scopus记录号: 2-s2.0-84939783636
论文题名: Early interglacial carbonate-dilution events in the South China Sea: Implications for strengthened typhoon activities over subtropical East Asia
作者: Huang E. ; Tian J. ; Qiao P. ; Wan S. ; Xie X. ; Yang W.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 125 起始页码: 61
结束页码: 77
语种: 英语
英文关键词: Carbonate cycle
; Interglacial
; Sea level
; Sedimentary process
; South China Sea
; Typhoon
Scopus关键词: Carbonation
; Hurricanes
; Isotopes
; Ocean currents
; Sea level
; Sedimentology
; Sediments
; Storms
; Submarine geology
; Carbonate concentrations
; Carbonate cycle
; Fine-grained sediment
; Interglacial
; Marine isotope stages
; Northern South China Sea
; Sedimentary process
; South China sea
; Calcium carbonate
; calcium carbonate
; carbonate
; concentration (composition)
; continental slope
; geoaccumulation
; Holocene
; interglacial
; marine sediment
; sedimentation rate
; subtropical region
; typhoon
; Luzon Strait
; Pacific Ocean
; South China Sea
; Taiwan Strait
英文摘要: A compilation of many late Quaternary marine sediment records from the northern South China Sea (SCS) continental slope confirms 15-50% reductions in sedimentary calcium carbonate concentrations between 11.0 and 8.5 ka BP in the early Holocene. This low carbonate% event occurred at a time when the regional sea level rose from -50 m to -10 m, which drowned large areas of continental shelves especially those near and within the Taiwan Strait. This event is associated with a significant increase in bulk sedimentation rates on the upper continental slope and the relative abundance of fine-grained detritus. Sediment provenance analyses suggest a dominant terrigenous input from Taiwan and a minor contribution from Luzon during the low carbonate% event, similar to the background terrigenous deposition in other periods of the Holocene. Two comparable low carbonate% events, respectively from the beginning of marine isotope stages 5.5 and 7.3, have also been recognized, pointing to similar causal factors. While carbonate dissolution and carbonate accumulation rate should not have been responsible, increased terrigenous input and dilution is considered as the main cause for the recurrent low carbonate% events in early interglacials. We further hypothesize that, during early interglacials, fluvial sediment discharge from Taiwan and Luzon intensified due to stronger typhoon activities, and massive fine-grained sediments from these two end members may have been transported to the northern SCS continental slope via surface and deep ocean currents. The conjecture of strengthened typhoon activities over East Asia during the early Holocene is supported by high ocean heat contents in the West Pacific Warm Pool area with the prevailing La Niña-like conditions. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59841
Appears in Collections: 过去全球变化的重建
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作者单位: State Key Laboratory of Marine Geology, Tongji University, Shanghai, China; Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, China
Recommended Citation:
Huang E.,Tian J.,Qiao P.,et al. Early interglacial carbonate-dilution events in the South China Sea: Implications for strengthened typhoon activities over subtropical East Asia[J]. Quaternary Science Reviews,2015-01-01,125