Natural and anthropogenic impacts on environmental changes over the past 7500 years based on the multi-proxy study of shelf sediments in the northern South China Sea

Huang, Chao; Zeng, Tao; Ye, Feng; Xie, Luhua; Wang, Zhibing; Wei, Gangjian; Lo, Li; Deng, Wenfeng; Rao, Zhiguo

doi:10.1016/j.quascirev.2018.08.005

Cited by 34 publications

(64 citation statements)

References 104 publications

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“…The core YJ, situated on a modern mud belt formed predominantly by Pearl River sediment discharge , consists of fine-grained muddy sediment with grey clay and/or clayey silt. Downcore results of lithology, grain size and chronology ( Figure S3), as presented in Huang et al (2018), collectively suggest that the sedimentary sequence is neither physically nor biologically disturbed and is suitable to investigate past ocean-atmosphere-land interactions on longer timescales. To generate downcore biomarker records, we sampled core YJ in steps of 1 cm for the upper 190 cm and then 2 cm down to its bottom.…”

Section: Biomarkersmentioning

confidence: 82%

“…Particularly, these age control points were operated within the R script BACON software, incorporating a total of 10,000 age-depth realizations, to calculate the mean age and also the 2σ analytical uncertainty at 1-cm resolution ( Figure S3). The derived chronology has been reported previously in Huang et al (2018), and fully described in supporting information.…”

Section: Core Sitementioning

confidence: 87%

“…In addition, the total hopane concentration experiences pulse-like increases (2 to 4 orders of magnitude higher) during the same cool intervals (Figure 2c). Simultaneously, large differences in sedimentation rates (Figure 2d) and terrigenous organic matter (Huang et al, 2018) between the LIA and~1,200-2,500 years BP, together with a weakened ASM substantiated by numerous terrestrial records Wang et al, 2005), enable us to reject the lateral transport of riverine input as the dominant source of increased hopane compounds. Detailed identification of corresponding samples in these two cool intervals further confirms that hopane compounds, mainly comprising C 30 -17α(H)21β(H) and C 31 -17α(H)21β(H)-S, contain little hopene content.…”

Section: Geophysical Research Lettersmentioning

confidence: 97%

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Asian Winter Monsoon Imprint on Holocene SST Changes at the Northern Coast of the South China Sea

Zhang

Zhu

Huang

et al. 2019

Geophysical Research Letters

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Independent inference of the Asian winter monsoon (AWM), albeit achieved at several sparse sites, has reached no consensus for its variability through the Holocene. A sediment core from the northern coast of the South China Sea (SCS) was utilized to analyze organic biomarkers at (bi‐)decadal resolution, unveiling how SCS oceanic conditions fingerprint the AWM signal. Generally, alkenone sea surface temperature (SST) record, resembling the temporal structures of integrated tropical SST over the past 7,500 years, shows abnormal cool temperatures (up to ~4 °C) during the Little Ice Age and between ~1,200 and 2,500 years BP, when windborne terrigenous hopane compounds experienced considerable increases superimposed on a general increasing trend. Our results, together with augmented SST gradient between the SCS coast and open ocean, consistently suggest AWM strengthening toward the late Holocene. An intensified AWM during cold intervals like the Little Ice Age would have provided strong positive feedback to enhance coastal cooling.

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Section: Biomarkersmentioning

confidence: 82%

Section: Core Sitementioning

confidence: 87%

Section: Geophysical Research Lettersmentioning

confidence: 97%

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Asian Winter Monsoon Imprint on Holocene SST Changes at the Northern Coast of the South China Sea

Zhang

Zhu

Huang

et al. 2019

Geophysical Research Letters

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“…Near cessation of peat deposition and negligible sedimentation between 4 and 2 ka BP in the Kimotsuki lowland delta plain of Southern Japan, suggests greatly reduced precipitation (Ishii, 2018). Multi-proxy evidence from a marine sediment core from the inner shelf of the northern South China Sea also suggests reduced summer rainfall at 3.5-2 ka BP ( Figure 5E; Huang C. et al, 2018). The grain size fraction in Tengchongqinghai Lake (Zhang et al, 2017) and the redness values in Qinghai Lake (Ji et al, 2005) also suggest decreased summer monsoon rainfall.…”

Section: Drought In Taiwan During 4-2 Ka Bp and A Possible Link To Elmentioning

confidence: 93%

Holocene East Asian Summer Monsoon Rainfall Variability in Taiwan

Ding

Zheng

et al. 2020

Front. Earth Sci.

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Characterizing the spatiotemporal variability of the East Asian summer monsoon (EASM) advances our understanding of its rhythm, dynamics, and future impacts. East Asian summer monsoon variations during the Holocene have been reconstructed from a variety of geological archives and proxies. However, the spatiotemporal heterogeneity of EASM rainfall during the Holocene remains controversial. Taiwan is geographically suitable for studying the EASM history, through its geological archives. Herein, we synthesize the reported lake and peat sedimentary records of the entire Holocene, in addition to the records of mass-wasting and on-land deposition from cores collected from Taiwan to illustrate the EASM induced hydroclimate changes in Taiwan throughout the Holocene. Records from Taiwan indicate that the EASM rainfall maximum occurred during the early Holocene, concurring with other EASM records from monsoon regions in southern China. We suggest that the early Holocene EASM rainfall maximum in southern China was mainly forced by the higher Northern Hemisphere summer insolation and sea surface temperatures (SSTs) in the Western Pacific Warm Pool (WPWP). A synthesis of EASM rainfall records from across China shows that the timing of the Holocene EASM rainfall maximum occurred progressively later than that from southern to northern China. This time-transgressive EASM rainfall maximum may be due to the latitudinal shift of the westerlies and Western Pacific subtropical high (WPSH) that was induced by changes of interhemispheric temperature gradients (T N−S) and the northern high latitude ice volume. Moreover, records from Taiwan suggest a significant collapse of the EASM in Taiwan at ∼4-2 ka BP. Based on the records from Taiwan, coastal East Asia, and the Tropical Pacific, we propose that the SSTs of the WPWP and/or El Niño-Southern Oscillation activity may have exerted a strong influence on the EASM rainfall changes during the late Holocene. Moreover, increased EASM rainfall in southern China during the last 2 ka was likely caused by a southward shift of WPSH, which is associated with gradual decreases in T N−S during the late Holocene.

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“…The mineralogical and geochemical characteristics of sedimentary archives from lakes, deltas, and marginal seas have long been used for studying the source-to-sink pathways of terrigenous sediments in response to variations in climate and environment in the geological past [1][2][3][4][5][6]. However, the bulk composition of sediment is controlled by a complex interplay of many factors, including bedrock composition in the source area, intensity of chemical weathering, grain size of the sediment, transport mechanism, diagenesis, and anthropogenic activity [7,8].…”

Section: Introductionmentioning

confidence: 99%

Geochemical Study of Detrital Apatite in Sediment from the Southern Okinawa Trough: New Insights into Sediment Provenance

Zeng

Fang

et al. 2019

Minerals

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Detrital apatite is a promising accessory mineral for reliable fingerprinting of the protolith composition of detrital sediment. Here, we present the geochemical compositions of detrital apatites from four sections of a high-resolution (~140 cm/kyr) sedimentary archive from the southern Okinawa Trough (SOT) for constraining sediment source rock types and establishing changes in provenance. A series of diagrams based on the geochemical data show that apatites in Section 1 derived mainly from mafic/intermediate rocks, while apatites in the three younger sections largely originated from mafic/intermediate rocks and acid rocks. Further, the four sections included a few contributions of apatites from alkaline rocks and metamorphic rocks. Through a comprehensive analysis of controlling factors and regional stratigraphy in the study area, we concluded that sediments in the SOT are the weathering/erosion products of sedimentary and meta-sedimentary rocks in the western and northeastern Taiwan Island, with ultimate sources containing a wide variety of rock types. The sediment from rivers in eastern Taiwan did not significantly contribute to deposition in the SOT. Apatites in Sections 2–4 showed strong geochemical similarity but differed from those in Section 1, indicating that the types of weathered/eroded sedimentary rocks in the weathering profile of river drainage basins of Taiwan Island changed in Section 2 (2010–1940 cal. yr BP) and have remained stable since then.

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Natural and anthropogenic impacts on environmental changes over the past 7500 years based on the multi-proxy study of shelf sediments in the northern South China Sea

Cited by 34 publications

References 104 publications

Asian Winter Monsoon Imprint on Holocene SST Changes at the Northern Coast of the South China Sea

Asian Winter Monsoon Imprint on Holocene SST Changes at the Northern Coast of the South China Sea

Holocene East Asian Summer Monsoon Rainfall Variability in Taiwan

Geochemical Study of Detrital Apatite in Sediment from the Southern Okinawa Trough: New Insights into Sediment Provenance

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