Paleoceanography of the mid-Pleistocene South China Sea

Li, Qianyu; Wang, Pinxian; Zhao, Qi; Tian, Jie; Cheng, Xiao; Jian, Zhimin; Zhong, Guangfa; Chen, Mu‐Hong

doi:10.1016/j.quascirev.2008.02.007

Cited by 46 publications

(27 citation statements)

References 62 publications

(114 reference statements)

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“…Another possibility is CH 4 emitted from sources very near the equator but offshore the northern monsoonal continents. The northward movement of the ITCZ caused by the hemispheric asymmetry might have brought unusually cool temperatures to those regions and suppressed CH 4 emissions, consistent with lower SST in the low-latitude Pacific (De Garidel-Thoron et al, 2005) and South China Sea (Li et al, 2008).…”

Section: Strong Asymmetry Of Hemispheric Climates During Mis-13mentioning

confidence: 82%

“…SST had a great variability, but was lower than for the other interglacials during most of the MIS-13 (De Garidel- Thoron et al, 2005). The percentages of warm surface and subsurface planktonic foraminifers in South China Sea were also significant lower than for the other interglacials (Li et al, 2008).…”

Section: Broad Coupling and Decoupled Aspects Of Hemispheric Climatesmentioning

confidence: 91%

“…Reduced winter and spring snow cover over Eurasia is also particularly favourable to stronger southwest summer monsoon winds (Goes et al, 2005). These conditions during MIS-13, associated with precession-driven insolation maxima at northern low-latitudes (Berger, 1978) and lower interglacial low-latitude SST (De Garidel-Thoron et al, 2005;Li et al, 2008), can largely explain the unusually strengthened monsoons in the Northern Hemisphere.…”

Section: Strong Asymmetry Of Hemispheric Climates During Mis-13mentioning

confidence: 99%

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Strong asymmetry of hemispheric climates during MIS-13 inferred from correlating China loess and Antarctica ice records

et al. 2009

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Abstract. We correlate the China loess and Antarctica ice records to address the inter-hemispheric climate link over the past 800 ka. The results show a broad coupling between Asian and Antarctic climates at the glacial-interglacial scale. However, a number of decoupled aspects are revealed, among which marine isotope stage (MIS) 13 exhibits a strong anomaly compared with the other interglacials. It is characterized by unusually positive benthic oxygen (δ 18 O) and carbon isotope (δ 13 C) values in the world oceans, cooler Antarctic temperature, lower summer sea surface temperature in the South Atlantic, lower CO 2 and CH 4 concentrations, but by extremely strong Asian, Indian and African summer monsoons, weakest Asian winter monsoon, and lowest Asian dust and iron fluxes. Pervasive warm conditions were also evidenced by the records from northern high-latitude regions. These consistently indicate a warmer Northern Hemisphere and a cooler Southern Hemisphere, and hence a strong asymmetry of hemispheric climates during MIS-13. Similar anomalies of lesser extents also occurred during MIS-11 and MIS-5e. Thus, MIS-13 provides a case that the Northern Hemisphere experienced a substantial warming under relatively low concentrations of greenhouse gases. It suggests that the global climate system possesses a natural variability that is not predictable from the simple response of northern summer insolation and atmospheric CO 2 changes. During MIS-13, both hemispheres responded in different ways leading to anomalous continental, marine and atmospheric conditions at the global scale. The correlations also suggest that the marine δ 18 O record is not always a reliable indicator of the northern ice-volume changes, and that the asymmetry of hemispheric climates is one of the prominent factors controlCorrespondence to: Z. T. Guo (ztguo@mail.iggcas.ac.cn) ling the strength of Asian, Indian and African monsoon circulations, most likely through modulating the position of the inter-tropical convergence zone (ITCZ) and land-sea thermal contrasts.

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Section: Strong Asymmetry Of Hemispheric Climates During Mis-13mentioning

confidence: 82%

Section: Broad Coupling and Decoupled Aspects Of Hemispheric Climatesmentioning

confidence: 91%

Section: Strong Asymmetry Of Hemispheric Climates During Mis-13mentioning

confidence: 99%

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Strong asymmetry of hemispheric climates during MIS-13 inferred from correlating China loess and Antarctica ice records

et al. 2009

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“…Palaeoenvironmental proxies from the South China Sea also indicate that the East Asian summer monsoon intensified during 1.25–0.9 Ma (e.g. Boulay et al ., ; Li et al ., ). These patterns are consistent with phased recoveries of vegetation cover represented by an increase of broad‐leaved trees in the study area during 1.25–0.96 Ma (Fig.…”

Section: Discussionmentioning

confidence: 97%

A pollen record of the Mid‐Pleistocene Transition from Beijing, North China

Jiang

Guo²,

Xiangmin

et al. 2013

J Quaternary Science

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To reconstruct the history of climate and environment in East Asia during the Early Pleistocene, a palynofloral investigation was conducted on fluviolacustrine sediments in Beijing, North China. The results indicate that herb and shrub taxa were dominant in most of the samples, reflecting an open forest grassland covering the Beijing region during much of the Early Pleistocene. This vegetation generally declined during 1.68–1.25 Ma and recovered in part during 1.25–0.96 Ma. From 0.96 Ma, conifers gradually replaced broad‐leaved trees, shrubs and herbs. After 0.65 Ma, the pollen abundance of conifers, shrubs and herbs all increased significantly. These vegetation changes took place in the context of long‐term global cooling during the Late Cenozoic. A significant increase in Antarctic ice volume at 1.25–1.20 Ma and the resultant increased meridional temperature gradient in the Southern Ocean led to prominent anomalous warming in the tropics and increased heat/moisture flow across the Equator, probably resulting in vegetation recovery in the study area to some extent during 1.25–0.96 Ma. From 0.96 Ma, the stepwise decline of vegetation cover in the study area, especially after 0.65 Ma, was driven by further development of global cooling and increase in polar ice volume.

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“…The structural pattern and bathymetry of the SCS are mainly controlled by the NNE-to NE-, E-W-to ENE-and NW-to WNWtrending faults, which were mainly inherited and propagated from the Mesozoic faults that crop out in South China (Xu et al, 1998;Q.Y. The structural pattern and bathymetry of the SCS are mainly controlled by the NNE-to NE-, E-W-to ENE-and NW-to WNWtrending faults, which were mainly inherited and propagated from the Mesozoic faults that crop out in South China (Xu et al, 1998;Q.Y.…”

Section: Regional Geological Settingmentioning

confidence: 99%

Temporal and spatial distribution of Cenozoic igneous rocks in the South China Sea and its adjacent regions: implications for tectono‐magmatic evolution

Hui

et al. 2016

Geological Journal

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The ocean–continent transition/conjunction zone is a mysterious and significant region in global tectonics and geodynamic evolution. The South China Sea (SCS) is one of the largest marginal basins in the Western Pacific with significant Cenozoic magmatic activities. The relationship between the tectono‐magmatic evolution and the tectonic setting of these Cenozoic igneous rocks is still controversial. In this study, the interpretation of gravity data, magnetic observation and seismic profiles is combined to identify the Cenozoic igneous rocks in the SCS and adjacent regions, and more than 70 magmatic activities have been discerned. We also show how the tectonic movements control the lithology and distribution of these magmatic activities. These Cenozoic magmatic rocks are related to the pre‐spreading, syn‐spreading and post‐spreading of the SCS. We suggest a geodynamic evolution of the SCS according to the temporal and spatial distribution of the igneous rocks. (1) An early period of bimodal volcanism (>32 Ma ago) mainly happened in the Paleogene basins at the northern margin of the SCS. This earlier volcanism happened under a trans‐extensional regime, which resulted from the collision between the Indian and the Eurasian plates since the early Cenozoic. The magmatic rocks may be related to the NNE‐trending right‐stepping dextral strike‐slip faults and the syn‐kinematic pull‐apart basins. These igneous rocks are mostly NNE trending. It is consistent with the Cenozoic dextral trans‐extensional tectonic setting in the East Asian Continental Margin. (2) Syn‐spreading igneous rocks first formed in the Northwest Sub‐basin of the SCS, and then later in the Central and Southwest sub‐basins. The mechanism of the magmatic emplacement results from the NNE‐trending right‐stepping dextral strike‐slip pull‐apart tectonic activity. (3) The spatial alignment of the Quaternary post‐spreading basalts is nearly E–W‐trending, and the different magmatic zones are segmented by NNE‐trending strike‐slip faulting. These volcanics are under an extrusion regime, which resulted from the arc–continent collision between the Luzon–Taiwan Arc and the Eurasian Plate due to the continuously WNW‐directed indentation of the Philippine Sea Plate during the period 9–6 Ma ago. In addition, the nascent NNE trending and dextral Changle–Nanao Fault may have played a significant role in the southward extrusion of the Taiwan Island Arc and the southeast SCS, resulting in an E–W‐trending distribution or strike of the volcanics and normal faults. In Indochina and the Malay Peninsula, widespread Cenozoic extensional post‐spreading granitic plutons are possibly derived from the mantle plume. Magnetic anomaly interpretation and tectonic analysis on these mafic rocks suggest that they were controlled by the Ailaoshan Red River left‐lateral ductile strike‐slip fault zone. Copyright © 2016 John Wiley & Sons, Ltd.

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Paleoceanography of the mid-Pleistocene South China Sea

Cited by 46 publications

References 62 publications

Strong asymmetry of hemispheric climates during MIS-13 inferred from correlating China loess and Antarctica ice records

Strong asymmetry of hemispheric climates during MIS-13 inferred from correlating China loess and Antarctica ice records

A pollen record of the Mid‐Pleistocene Transition from Beijing, North China

Temporal and spatial distribution of Cenozoic igneous rocks in the South China Sea and its adjacent regions: implications for tectono‐magmatic evolution

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