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Evidence for sea level and monsoonally driven variations in terrigenous input to the northern East China Sea during the last 24.3ka
Chang, Fengming; Li, Tiegang; Xiong, Zhifang; Xu, Zhaokai
2015-06-01
Source PublicationPALEOCEANOGRAPHY
Volume30Issue:6Pages:642-658
SubtypeArticle
AbstractGeochemical and sedimentological analyses of core PC-1 recovered from the northern East China Sea (ECS) provide insights into variations in terrigenous input associated with sea level and climate changes over the past 24.3ka. Based on high-resolution multiproxy records, our results suggest that the competing processes of sea level and monsoonally driven precipitation determined terrigenous input to the northern ECS. Dominance of terrigenous material, along with relatively light Globigerinoides ruber O-18, indicates that the Last Glacial Maximum (LGM) lowstand of sea level has occurred during the period 21.5-19.6ka, not suggesting an early slow rise but supporting the conventional LGM age of 21ka. This LGM lowstand was terminated by the rapid sea level rise of 19ka meltwater pulse (MWP), which is well expressed by the nearly synchronous decreases in both terrigenous detritus and mean grain size from 19.6 to 18.9ka. MWP-1A is clearly marked in our records by a sharp reduction in terrigenous input and pronounced maxima of G. ruber O-18 at 15.3-14.8ka, given the considerable age uncertainties of deglacial marine radiocarbon samples. A slightly increasing input of terrigenous matter is noted after 13.4ka, potentially pointing to a sea level fall following the Inter-AllerOd Cooling Period, which was seldom reported previously. Although MWP-1B did not leave robust signatures in terrigenous input, it is explicitly captured by the heavy O-18 of G. ruber and decline in mean grain size at 11.5-10.9ka. MWP-1c probably occurred in a broad millennial interval with multiple peaks, which are robustly marked by the abrupt variations in terrigenous input and marine organic matter at 9.7-9.3 and 9.1ka, respectively. During the late Holocene, the effect of continuously weakening monsoon precipitation overwhelmed that of stable sea level resulting in a uniform increase in the proportion of marine-derived organic matter after 5.5ka.
KeywordTerrigenous Input Sea Level Change East Asian Monsoon East China Sea
DOI10.1002/2014PA002733
Indexed BySCI
Language英语
WOS IDWOS:000358041400005
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Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/49052
Collection海洋地质与环境重点实验室
AffiliationChinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao, Peoples R China
Recommended Citation
GB/T 7714
Chang, Fengming,Li, Tiegang,Xiong, Zhifang,et al. Evidence for sea level and monsoonally driven variations in terrigenous input to the northern East China Sea during the last 24.3ka[J]. PALEOCEANOGRAPHY,2015,30(6):642-658.
APA Chang, Fengming,Li, Tiegang,Xiong, Zhifang,&Xu, Zhaokai.(2015).Evidence for sea level and monsoonally driven variations in terrigenous input to the northern East China Sea during the last 24.3ka.PALEOCEANOGRAPHY,30(6),642-658.
MLA Chang, Fengming,et al."Evidence for sea level and monsoonally driven variations in terrigenous input to the northern East China Sea during the last 24.3ka".PALEOCEANOGRAPHY 30.6(2015):642-658.
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