Early interglacial carbonate-dilution events in the South China Sea: Implications for strengthened typhoon activities over subtropical East Asia

Huang, Enqing; Tian, Jie; Qiao, Peijun; Wan, Sui; Xie, Xinong; Yang, Wencong

doi:10.1016/j.quascirev.2015.08.007

Cited by 25 publications

(11 citation statements)

References 83 publications

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“…More works are needed, especially numerical models of marine ecosystems in geological history, to extent the understanding of paleoproductivity. [Huang et al, 2015]. Therefore, we suggest that the discussions of the Holocene records are reliable.…”

Section: Pp Forced By the Eawm And Sea Level During The Lgm And Deglamentioning

confidence: 71%

“…Since only three AMS 14 C age constraints were analyzed for the Holocene period of MD12‐3428cq, caution is needed in the interpretation of the PP variations during this epoch. Sedimentation rates of different cores on the upper continental slope seem to remain stable since the middle Holocene [ Huang et al ., ]. Therefore, we suggest that the discussions of the Holocene records are reliable.…”

Section: Resultsmentioning

confidence: 99%

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Dynamics of primary productivity in the northern South China Sea over the past 24,000 years

Zhang

Liu

Jin

et al. 2016

Geochem Geophys Geosyst

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In this study, paleoproductivity on millennial scales was precisely reconstructed from core MD12‐3428cq in the northern South China Sea (SCS) over the past 24 kyr, based on a transfer function derived from the strong exponential negative correlation between relative abundance of Florisphaera profunda (%FP) in core top sediments and basin‐wide satellite‐based primary productivity (PP) in the SCS. To detect the potential driving mechanisms of PP, correlation analyses were carried out among our PP records and other paleoenvironment parameters. PP peaked during 18–15 ka in parallel with the strong East Asian Winter Monsoon (EAWM). From 15 ka to the early Holocene, a decrease in PP coincided with sea level progradation and weakening of EAWM, which ultimately reduced fluvial nutrient levels and wind‐driven upper water column mixing. Since the middle Holocene, gradually more frequent El Niño‐Southern Oscillation (ENSO) events have taken place, further decreasing PP by injecting oligotrophic Kuroshio water masses into the northern SCS. Associated findings conclusively indicated that the main controlling factors of PP in the northern SCS have shifted from EAWM (glacial) to ENSO (interglacial) over the past 24 kyr.

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Section: Pp Forced By the Eawm And Sea Level During The Lgm And Deglamentioning

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Dynamics of primary productivity in the northern South China Sea over the past 24,000 years

Zhang

Liu

Jin

et al. 2016

Geochem Geophys Geosyst

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“…Selection of proxies for East Asian summer monsoon.The sediments of the South China Sea contain a large amount of paleoenvironmental information, which is an excellent material for the reconstruction of East Asian monsoon history and the study of paleo-oceanic evolution [11][12][13]29,[31][32] . Previous studies have found that element ratios can effectively record the surface chemical weathering intensity 10,[33][34][35][36] 2015) believed that the correlation coe cient between geochemical parameters and particle size of KNG5 core was weak, and chemical alteration index, orthoclase alteration index, Rb/Sr, Al/Ti and K/Al could be used as reliable proxies for climate change 36 . Many studies suggest that the particle size of about 2-10 μm is weakly affected by sea level change or bottom current, and is a reliable source of aeolian dust and river input, so it can be used as a proxy index for the East Asian Summer monsoon [37][38][39] .…”

Section: Discussionmentioning

confidence: 99%

Paleoclimatic evolution and weathering in the Northern South China Sea during the last 61 kyr BP--Sedimentary records from the coastal zone

Liang¹,

Xu²,

Xia³

et al. 2023

Preprint

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The history of silicate chemical weathering is recorded by Marine sediments in the west coastal zone, contains the information of terrigenous climate and environment evolution.in order to constrain the Proxy index and driving mechanism of summer monsoon intensityof the sediments from this core since ~61 Kyr BP, the grain size, clay minerals and elemental geochemistry of sediments from core KZK01 in the coastal zone of the Northern South China Sea have been analyzed. The results showed that the illite crystallinity and smectite/(illite+chlorite) not only reflects the intensity of surface chemical weathering in the source area, but also clearly records the Heinrich event (H5), Younger Dryas event and the cold events since the Holocene, such as 8.2 Ka, 4.2 Ka and 2.8 Ka.The regional East Asian summer monsoon is mainly driven by the summer solar radiation at low latitudes in the northern hemisphere,Cold climate events have a global consistency and may be related to the global impact of high-latitude ice sheets.The paleoclimatic changes since 61 Kyr BP in the Northern South China Sea can be divided into 61kry BP~59.5kry BP、59.5kry BP~49.5kry BP、49.5kry BP~40.5kry BP、and 40.5kry BP~11.5kry BP、11.5kry bp~2 kry BP and 2kry BP to present six stages.In different stages of climate evolution, the alternating characteristics of cold, dry, warm and wet are obvious, with significant stages.

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“…Since the last deglaciation, the EASM (Figures 8C, D) and the solar radiation in the Northern Hemisphere have gradually become stronger (Figure 8H). By the early Holocene, the East Asian monsoon reached its peak (Dykoski et al, 2005), and the strong summer monsoon inevitably brought heavy rainfall and enhanced river supply capacity, which, together with the increased typhoon events during this period, led to increased soil erosion in Taiwan (Huang et al, 2015). As a result, for core SCS18-1, the total amount of terrigenous detrital material from Taiwan increased, i.e., the relative content of EM1+EM2, representing fluvial material, increased (Figure 8A), and the sedimentation rate reached a maximum near 10.6 ka BP (Figure 8I).…”

Section: Relevance Of Environmental Indicatorsmentioning

confidence: 99%

Provenance and paleoenvironmental significance of sediments in the Beipo seamount of the northern South China Sea during the last deglaciation

Tian

Zhang²,

Wang³

et al. 2023

Front. Mar. Sci.

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The sedimentary processes of seamount regions are closely related to climate change and ocean evolution. The clay minerals, grain size and 14C ages of core SCS18-1, which was collected from the Beipo seamount in the northern South China Sea (SCS) were analyzed to discuss the provenance and paleoenvironmental conditions during the last deglaciation. The sediments of core SCS18-1 are dominated by clayey silt, which is mainly composed of illite (55.2~62.1%) and chlorite (17.1~22.5%), with subordinate kaolinite (9.5~12.6%) and smectite (7.3~15.1%). The illite chemical index and illite crystallinity indicate strong physical weathering conditions. The results of the end-member modeling algorithm (EMMA) suggest that the sediments of core SCS18-1 consist of three end-members containing EM1 (0.98 μm), EM2 (9.29 μm) and EM3 (44.19 μm), with average contents of 3%, 66% and 31%, respectively. The finest endmember represents fluvial mud, the middle and coarsest endmembers are considered fluvial fine silt and eolian dust, respectively. The mean grain size is mainly controlled by the coarser fraction EM3. Based on the clay minerals, grain size and SEM analysis, we can conclude that since the onset of the last deglaciation (16.1 ka BP), the sediments of core SCS18-1 mainly originate from fluvial input, and eolian material also contributed to the sediments. The clay mineral assemblages of core SCS18-1 are stable and originate mainly from Taiwan. Additionally, the Pearl River appears to be a secondary contributor of clay minerals. Further, the Luzon Islands only account for a small proportion. Major kaolinite and moderate illite and chlorite are thought to originate from the Pearl River, predominant illite and chlorite from Taiwan, and principal smectite from the Luzon Islands. Both the relative content of EM1+ EM2 and the illite chemical index effectively represent the variation of East Asia summer monsoon (EASM) strength. Meanwhile, the relative content of EM3 effectively represents the East Asian winter monsoon (EAWM) change. The material supply of core SCS18-1 is mainly controlled by solar radiation in the Northern Hemisphere.

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Early interglacial carbonate-dilution events in the South China Sea: Implications for strengthened typhoon activities over subtropical East Asia

Cited by 25 publications

References 83 publications

Dynamics of primary productivity in the northern South China Sea over the past 24,000 years

Dynamics of primary productivity in the northern South China Sea over the past 24,000 years

Paleoclimatic evolution and weathering in the Northern South China Sea during the last 61 kyr BP--Sedimentary records from the coastal zone

Provenance and paleoenvironmental significance of sediments in the Beipo seamount of the northern South China Sea during the last deglaciation

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