Late Quaternary environmental changes in the Pearl River mouth region, China

Zong, Yongqiang; Yim, Wyss W. -S.; Yu, Fang; Huang, Guangqing

doi:10.1016/j.quaint.2008.10.012

Cited by 117 publications

(56 citation statements)

References 32 publications

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“…There is a clear change in sedimentation at 10.07 marking the boundary between Holocene sedimentation above and pre-Holocene sedimentation below (poorly sorted firm clay through to gravel sediments below, soft silt and clay above). This is supported by the radiocarbon date of 33500 ± 360 cal yr BP at 12.5 m (Zong et al, 2009b). The age of the base of the Holocene section is estimated at 6650 cal yr BP based on the age model developed by Zong et al, 2010b (Figure 3).…”

Section: Resultssupporting

confidence: 54%

Mid-Holocene variability of the East Asian monsoon based on bulk organic δ¹³C and C/N records from the Pearl River estuary, southern China

Zong

Lloyd

et al. 2011

The Holocene

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Understanding the mid-Holocene dynamics of the East Asian monsoon (EAM) is integral to improving models of the Holocene development of the global climate system. Here we reconstruct the mid-Holocene EAM history from the Pearl River estuary, southern China, using bulk organic carbon isotopes (δ13C), total carbon to total nitrogen (C/N) ratios and total organic carbon (TOC) concentration. Sedimentary δ13C, C/N and TOC are potentially good indicators of changes in monsoonal precipitation strength. Sediments buried during a period of high precipitation exhibit a high proportion of terrigenous material, and have low δ13C and high C/N, and vice versa during a period of low precipitation. Results suggest a general decreasing trend in monsoonal precipitation from 6650 to 2150 cal. yr BP because of the weakening Northern Hemisphere insolation most likely related to the current precession circle. Superimposed on this trend are apparent dry–wet oscillations at centennial to millennial timescales most likely in response to solar activity. Mismatches between our δ13C record and results from the Dongge Cave in southern China at millennial timescales may indicate that the δ13C from the Pearl River estuary reveals changes in precipitation over a broader area than the δ18O from Dongge Cave.

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Section: Resultssupporting

confidence: 54%

Mid-Holocene variability of the East Asian monsoon based on bulk organic δ¹³C and C/N records from the Pearl River estuary, southern China

Zong

Lloyd

et al. 2011

The Holocene

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“…The sea level in MIS 3 seemed to not reach the location of the modern sea level in the study area and generally agreed that the coastline was close to or below 10-20 m of the modern shoreline [29]. In other words, the sea level regressed from this region with the time of 70-10 ka BP (MIS 2-4), and the corresponding sediments probably suffered from weathering denudation [33]. In the Holocene (MIS 1), the sea level rose rapidly and largescale seawater intrusion occurred, resulting in an interactive marine and terrestrial deposit with a whole transgressionto-regression succession [22,34].…”

Section: Transgressions and Regressionsmentioning

confidence: 76%

Cl⁻ as a Chemical Fingerprint of Solute Transport in the Aquitard-Aquifer System of the North Jiangsu Coastal Plain, China

Ge¹,

Liang²,

Jin³

et al. 2017

Geofluids

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Detailed vertical profiles of Cl− in porewaters through the aquitard-aquifer system were used to yield solute transport mechanism and build a conceptual model regarding evolution processes and transport time of natural tracer migration in North Jiangsu coastal plain, China. One-dimensional vertical simulated models of Cl − profiles illustrate that diffusion appeared to be the dominant solute transport mechanism in the aquitard-aquifer system. A downward groundwater flow did not improve the fitness between simulated and measured values. Several simulated models were constructed and suggested that the evolution of the Cl − profiles is mainly ascribed to the introduction of seawater and freshwater of transgression-regression to the first confined aquifer and the upper boundary. Groundwater in the first confined aquifer recharged by the Late Pleistocene glacial meltwater (25-15 ka BP) was supported in response to the low Cl − concentrations. The shallow groundwater in the first confined aquifer and porewater with high salt were attributable to the Holocene seawater intrusion. These timeframes were also consistent favorably with the results of previous studies into the palaeohydrology of the study area.

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“…Cores JT81 and BVC were selected for analysis to reconstruct water salinity history of the upper and lower estuarine areas respectively ( Figure 1A). The two cores are from sites where both the M1 and M2 units are preserved (Zong et al, 2009b). Cores UV1 and V37 are both from the pro-delta area, where continuous sedimentary accretion was recorded (Zong et al, 2009a), thus they are suitable for reconstruction of detailed Holocene salinity history.…”

Section: Methodsmentioning

confidence: 99%

“…The younger estuarine sequence (M1) was deposited during the present interglacial (Zong et al, 2009a). These two estuarine sequences are well preserved across the estuary and separated by the younger terrestrial sequence (T1), comprising either fl uvial sand/gravel or weathered clay (Zong et al, 2009b). Within the M1 sequence, Zong et al (2009b) identifi ed a sub-unit (M1a) which was deposited during the period of postglacial sea-level rise, preceding the M1 unit, which formed during the period of stable sea level over the last 8000 years (Yim, 1994).…”

Section: The Study Areamentioning

confidence: 99%

The history of water salinity in the Pearl River estuary, China, during the Late Quaternary

Zong

Huang

et al. 2010

Earth Surf Processes Landf

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This research reconstructed the Late Quaternary salinity history of the Pearl River estuary, China, from diatom records of four sedimentary cores. The reconstruction was produced through the application of a diatom-salinity transfer function developed based on 77 modern surface sediment samples collected across the estuary from shallow marine environment to deltaic distributaries. The statistical analysis indicates that the majority of sediment samples from the cores has good modern analogues, thus the reconstructions are reliable. The reconstructed salinity history shows the older estuarine sequence formed during the last interglacial was deposited under similar salinity conditions to the younger estuarine sequence, which was formed during the present interglacial. Further analysis into the younger estuarine sequence reveals the interplays between sea level, monsoon-driven freshwater discharge, and deltaic shoreline movement, key factors that have infl uenced water salinity in the estuary. In particular, a core from the delta plain shows the effects of sea-level change and deltaic progradation, while cores from the mouth region of the estuary reveal changes of monsoon-driven freshwater discharge. This study demonstrates the advantages of quantitative salinity reconstructions to improve the quality of reconstruction and allow direct comparison with other quantitative records and the instrumentally observed values of salinity.

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Late Quaternary environmental changes in the Pearl River mouth region, China

Cited by 117 publications

References 32 publications

Mid-Holocene variability of the East Asian monsoon based on bulk organic δ¹³C and C/N records from the Pearl River estuary, southern China

Mid-Holocene variability of the East Asian monsoon based on bulk organic δ¹³C and C/N records from the Pearl River estuary, southern China

Cl⁻ as a Chemical Fingerprint of Solute Transport in the Aquitard-Aquifer System of the North Jiangsu Coastal Plain, China

The history of water salinity in the Pearl River estuary, China, during the Late Quaternary

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Late Quaternary environmental changes in the Pearl River mouth region, China

Cited by 117 publications

References 32 publications

Mid-Holocene variability of the East Asian monsoon based on bulk organic δ13C and C/N records from the Pearl River estuary, southern China

Mid-Holocene variability of the East Asian monsoon based on bulk organic δ13C and C/N records from the Pearl River estuary, southern China

Cl− as a Chemical Fingerprint of Solute Transport in the Aquitard-Aquifer System of the North Jiangsu Coastal Plain, China

The history of water salinity in the Pearl River estuary, China, during the Late Quaternary

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Resources

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Mid-Holocene variability of the East Asian monsoon based on bulk organic δ¹³C and C/N records from the Pearl River estuary, southern China

Mid-Holocene variability of the East Asian monsoon based on bulk organic δ¹³C and C/N records from the Pearl River estuary, southern China

Cl⁻ as a Chemical Fingerprint of Solute Transport in the Aquitard-Aquifer System of the North Jiangsu Coastal Plain, China