seasurfacetemperatureevolutioninthewesternsouthchinaseasincemis12asevidencedbyplanktonicforaminiferalassemblagesandglobigerinoidesrubermgcaratio
Based on the detailed planktonic foraminifera faunal count and Globigerinoides ruber Mg/Ca ratio analysis of Core MD05-2901,we reconstructed the longest Mg/Ca sea surface temperature(SST) sequence of the upwelling area off Vietnam in the western South China Sea(SCS).Ocean environment,especially the...
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ftchinacscnigpas:oai:ir.nigpas.ac.cn:332004/30975 2023-05-15T18:01:03+02:00 seasurfacetemperatureevolutioninthewesternsouthchinaseasincemis12asevidencedbyplanktonicforaminiferalassemblagesandglobigerinoidesrubermgcaratio Wang XiaoYan Li BaoHua 2012-01-01 http://ir.nigpas.ac.cn/handle/332004/30975 英语 eng sciencechinaearthsciences http://ir.nigpas.ac.cn/handle/332004/30975 期刊论文 2012 ftchinacscnigpas 2020-03-20T01:05:52Z Based on the detailed planktonic foraminifera faunal count and Globigerinoides ruber Mg/Ca ratio analysis of Core MD05-2901,we reconstructed the longest Mg/Ca sea surface temperature(SST) sequence of the upwelling area off Vietnam in the western South China Sea(SCS).Ocean environment,especially the SST variation,over the last 450 ka is discussed in this study.SST variation has typical glacial/interglacial alternations from 23.03°C to 29.93°C with a glacial/interglacial difference of 4.8°C on average.SST during the interglacial periods fluctuates significantly,up to 5.6°C,which is larger than the average glacial/interglacial difference.SST variation during the glacial periods is much smaller.Spectrum analysis shows that SST change dominates on the typical Milankovitch cycles,such as 112,40.7 and 23.6 ka.Evident leading of SST variation against the δ ~(18) O can be observed during the Terminations 1,4,and 5,which is confirmed by their cross-spectrum analysis on these cycles.MD05-2901 is the first core in the South China Sea that has multi-SST records,such as SST_(Mg/Ca),U~(k’)_(37) -SST and planktonic foraminiferal fauna-based SST.SSTs from different methods can be correlated with each other in glacial/interglacial time scale,whereas SST_(Mg/Ca) records abrupt climate change events more clearly.SST_(Mg/Ca) at MD05-2901 since MIS 5 is 0.6°C lower than that of the southern SCS on average,but equivalent to or even 2°C lower than that of the northern SCS during some interglacial period.The SST character of MD05-2901 reflects less influence of latitude,but an important role of the regional upwelling driven by the eastern Asian summer monsoon,and suggests a stronger upwelling during the interglacial periods in the western SCS. Report Planktonic foraminifera Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) |
institution |
Open Polar |
collection |
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacscnigpas |
language |
English |
description |
Based on the detailed planktonic foraminifera faunal count and Globigerinoides ruber Mg/Ca ratio analysis of Core MD05-2901,we reconstructed the longest Mg/Ca sea surface temperature(SST) sequence of the upwelling area off Vietnam in the western South China Sea(SCS).Ocean environment,especially the SST variation,over the last 450 ka is discussed in this study.SST variation has typical glacial/interglacial alternations from 23.03°C to 29.93°C with a glacial/interglacial difference of 4.8°C on average.SST during the interglacial periods fluctuates significantly,up to 5.6°C,which is larger than the average glacial/interglacial difference.SST variation during the glacial periods is much smaller.Spectrum analysis shows that SST change dominates on the typical Milankovitch cycles,such as 112,40.7 and 23.6 ka.Evident leading of SST variation against the δ ~(18) O can be observed during the Terminations 1,4,and 5,which is confirmed by their cross-spectrum analysis on these cycles.MD05-2901 is the first core in the South China Sea that has multi-SST records,such as SST_(Mg/Ca),U~(k’)_(37) -SST and planktonic foraminiferal fauna-based SST.SSTs from different methods can be correlated with each other in glacial/interglacial time scale,whereas SST_(Mg/Ca) records abrupt climate change events more clearly.SST_(Mg/Ca) at MD05-2901 since MIS 5 is 0.6°C lower than that of the southern SCS on average,but equivalent to or even 2°C lower than that of the northern SCS during some interglacial period.The SST character of MD05-2901 reflects less influence of latitude,but an important role of the regional upwelling driven by the eastern Asian summer monsoon,and suggests a stronger upwelling during the interglacial periods in the western SCS. |
format |
Report |
author |
Wang XiaoYan Li BaoHua |
spellingShingle |
Wang XiaoYan Li BaoHua seasurfacetemperatureevolutioninthewesternsouthchinaseasincemis12asevidencedbyplanktonicforaminiferalassemblagesandglobigerinoidesrubermgcaratio |
author_facet |
Wang XiaoYan Li BaoHua |
author_sort |
Wang XiaoYan |
title |
seasurfacetemperatureevolutioninthewesternsouthchinaseasincemis12asevidencedbyplanktonicforaminiferalassemblagesandglobigerinoidesrubermgcaratio |
title_short |
seasurfacetemperatureevolutioninthewesternsouthchinaseasincemis12asevidencedbyplanktonicforaminiferalassemblagesandglobigerinoidesrubermgcaratio |
title_full |
seasurfacetemperatureevolutioninthewesternsouthchinaseasincemis12asevidencedbyplanktonicforaminiferalassemblagesandglobigerinoidesrubermgcaratio |
title_fullStr |
seasurfacetemperatureevolutioninthewesternsouthchinaseasincemis12asevidencedbyplanktonicforaminiferalassemblagesandglobigerinoidesrubermgcaratio |
title_full_unstemmed |
seasurfacetemperatureevolutioninthewesternsouthchinaseasincemis12asevidencedbyplanktonicforaminiferalassemblagesandglobigerinoidesrubermgcaratio |
title_sort |
seasurfacetemperatureevolutioninthewesternsouthchinaseasincemis12asevidencedbyplanktonicforaminiferalassemblagesandglobigerinoidesrubermgcaratio |
publishDate |
2012 |
url |
http://ir.nigpas.ac.cn/handle/332004/30975 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
sciencechinaearthsciences http://ir.nigpas.ac.cn/handle/332004/30975 |
_version_ |
1766170373846466560 |