scholarly journals Upwelling of Pacific Intermediate Water in the South China Sea Revealed by Coral Radiocarbon Record

Radiocarbon ◽  
2016 ◽  
Vol 58 (1) ◽  
pp. 37-53 ◽  
Author(s):  
Annette Bolton ◽  
Nathalie F Goodkin ◽  
Ellen R M Druffel ◽  
Sheila Griffin ◽  
Sujata A Murty
Keyword(s):  
South China Sea ◽  
South China ◽  
North Equatorial Current ◽  
Intermediate Water ◽  
The South ◽  
Porites Lutea ◽  
China Sea ◽  
The North ◽  
Upwelled Water ◽  
Equatorial Current

AbstractAnnual radiocarbon from a massive Porites lutea coral collected from Hon Tre Island, Vietnam, South China Sea (SCS) was analyzed over a ~100-yr-long period from AD 1900 to 1986. The pre-bomb results from 1900–1953 show a steady Δ14C value of –54.4±1.8‰ (n=60). These values are similar to coral records located in the central and southern SCS and from Indonesian waters, but are lower than those from Japan. Following the input of anthropogenic bomb 14C, our results show a sharp increase in Δ14C from 1960, reaching a peak value of 155.3‰ in 1973. The Hon Tre Island post-bomb Δ14C values are lower than those of other corals located in the SCS and Japan, but higher compared to those in the Indonesian Seas. This study infers a seasonal input of upwelled water depleted in 14C from the deeper SCS basin that originates from the tropical Pacific via the Luzon Strait. The bifurcation of the North Equatorial Current feeds the surface and intermediate currents in the SCS and Makassar Strait region. However, unlike the Makassar site, this study’s coral Δ14C does not receive lower 14C water from the South Pacific Equatorial Current. The Vietnam record therefore represents a unique oceanographic position, reflecting the seasonal influence of older, deeper SCS waters that upwell periodically in this area and have modified the surface waters locally in this region over the last 100 yr.

Response of upper ocean structure to the initiation of the North Hemisphere glaciation in the South China Sea

2003 ◽  
Vol 196 (3-4) ◽  
pp. 305-318 ◽  
Author(s):  
Baoqi Huang ◽  
Xingrong Cheng ◽  
Zhimin Jian ◽  
Pinxian Wang
Keyword(s):  
South China Sea ◽  
South China ◽  
The South China Sea ◽  
Upper Ocean ◽  
The South ◽  
China Sea ◽  
The North

scholarly journals Interannual Variation of the Late Spring–Early Summer Monsoon Rainfall in the Northern Part of the South China Sea

2011 ◽  
Vol 24 (16) ◽  
pp. 4295-4313 ◽  
Author(s):  
Tsing-Chang Chen ◽  
Wan-Ru Huang ◽  
Ming-Cheng Yen
Keyword(s):  
South China Sea ◽  
South China ◽  
North Pacific ◽  
Interannual Variation ◽  
The South China Sea ◽  
The South ◽  
China Sea ◽  
Northern Vietnam ◽  
The North ◽  
The North Pacific

Abstract Major rainfall (≥60%) in the northern part of the South China Sea (between North Vietnam and Taiwan) during May–June (the mei-yu season—the first phase of the Southeast–East Asian monsoon) is produced by rainstorms originating over the northern Vietnam–southwestern China region and the northern part of the South China Sea. As observed in this study, the occurrence frequency of rainstorms and rainfall contribution by these rainstorms undergoes a distinct interannual variation, in-phase with those of monsoon westerlies in northern Indochina and sea surface temperature (SST) anomalies over the NOAA Niño-3.4 region ΔSST (Niño-3.4). This in-phase relationship between monsoon westerlies and the ΔSST (Niño-3.4) anomalies is a result of the filling (deepening) of the subtropical Asian continental thermal low in response to the ΔSST (Niño-3.4) warm (cold) anomalies. Accompanied with this response is a slight southward (northward) shift of the North Pacific convergence zone (NPCZ), which extends from southern China to the North Pacific east of Japan. Thus, a favorable environment that meets the Charney–Stern instability criterion in initiating rainstorm genesis is enhanced (suppressed) by the intensification (weakening) of the monsoon shear flow formed by the midtropospheric northwesterly flow around the northeast periphery of the Tibetan Plateau and the monsoon westerlies. The meridional shift of the NPCZ established an elongated anomalous convergence (divergence) zone of water vapor flux along rainstorm tracks to increase (reduce) the rain-producing efficiency of rainstorms. Consequently, this interannual rainfall variation between northern Vietnam and Taiwan is primarily caused by rainstorm genesis and rain-producing efficiency.

Genetic diversity and large-scale connectivity of the scleractinian coral Porites lutea in the South China Sea

Coral Reefs ◽  
2018 ◽  
Vol 37 (4) ◽  
pp. 1259-1271 ◽  
Author(s):  
Wen Huang ◽  
Ming Li ◽  
Kefu Yu ◽  
Yinghui Wang ◽  
Jingjing Li ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
South China Sea ◽  
South China ◽  
Scleractinian Coral ◽  
Large Scale ◽  
The South China Sea ◽  
The South ◽  
Porites Lutea ◽  
China Sea

Research progress on the Zhongnan-Liyue Fault Zone in the South China Sea Basin

2020 ◽  
Author(s):  
Ziying Xu ◽  
Jun Wang ◽  
Hongfang Gao ◽  
Yongjian Yao
Keyword(s):  
Spatial Distribution ◽  
South China Sea ◽  
Fault Zone ◽  
South China ◽  
The South China Sea ◽  
Magnetic Data ◽  
Tectonic Deformation ◽  
The South ◽  
China Sea ◽  
The North

<p>We give a review of the up-to-date research situation about The Zhongnan-Liyue Fault Zone (ZLFZ), than analyze the spatial distribution and tectonic deformation feature of the ZLFZ based on the geophysical data including topographic, seismic, gravity and magnetic data. The results show that the ZLFZ has obvious north-south segmentation characteristics in in the South China Sea Basin. The north section, which is between northwest sub-basin and east sub-basin, is a narrow zone with the width of ~16 km, and is NNW trend from 18°N,115.5°E to 17.5°N,116°E. Meanwhile ,the south section, which is between southwest sub-basin and east sub-basin, is a wide zone with the width of 60-80 km, and is NNW trend from the east of ZhongshaBank to the west of LiyueBank. The main fault of the ZLFZ is NNW trend along the seamounts ridge of Zhongnan. the ZLFZ of transition region is NNE trend from the north section to the south section. According the sub-basin’s sedimentary thickness and oceanic crust thickness exist obvious difference, on both sides of the ZLFZ, we speculate that the ZLFZ play an important role on geological structure of sub-basin. According to the chang of crustal structure, We speculate that the ZLFZ is at least a crustal fracture zone.</p><p><strong>Key words: </strong>South China Sea Basin; Zhongnan-Liyue Fault Zone; Spatial distribution; Tectonic deformation<strong> </strong></p><p><strong>Foundation item:</strong> National Natural Science Foundation of China (41606080, 41576068); The China Geological Survey Program (GZH201400202, 1212011220117, DD20160138, 1212011220116).</p>

Inner Shelf Benthic Foraminifera of the South China Sea, East Coast Peninsular Malaysia

2019 ◽  
Vol 49 (1) ◽  
pp. 11-28 ◽  
Author(s):  
Rokiah Suriadi ◽  
Hasrizal Shaari ◽  
Stephen J. Culver ◽  
Mohd Lokman Husain ◽  
V. R. Vijayan ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Benthic Foraminifera ◽  
East Coast ◽  
Peninsular Malaysia ◽  
The South ◽  
Inner Shelf ◽  
China Sea ◽  
The North ◽  
Muddy Sediments

Abstract The distributional patterns of modern benthic foraminifera from the inner shelf of the southern South China Sea, off the east coast of peninsular Malaysia, are documented for the first time. The study area from Tanjung Sedili, Johor in the south to Marang, Terengganu, in the north was selected for a sand-resource study by the Minerals and Geoscience Department, Malaysia in 1993. Twenty-four surface sediment samples from <50 m water depth contained 266 foraminiferal species belonging to 6 orders, 49 families, and 117 genera, including 32 agglutinated, 130 calcareous hyaline, and 104 calcareous porcelaneous species. Two biofacies were distinguished by cluster analysis. Biofacies A was characterized by high relative abundance of Amphistegina papillosa and few other larger benthic foraminiferal (LBF) taxa in sandier sediments. Biofacies B was characterized by Pseudorotalia schroeteriana and other small rotaliids that were found in muddy sediments. The following features of foraminiferal assemblages and sediments reflect the strong fluvial/terrestrial influence on this tropical shelf environment: the overall moderate foraminiferal diversity, dominance of rotaliids over miliolids, overall dominance of smaller foraminiferal assemblages by Elphidium crispum, the limited diversity of LBF, the limited abundance of A. lessonii and the dominance of LBF assemblages by A. papillosa at relatively shallow depths. These features indicate at least intermittently turbid waters with limited light penetration and the dominance of the shelf sediments by siliciclastics, with mean percent carbonates <35%.

Geothermal investigation of the thickness of gas hydrate stability zone in the north continental margin of the South China Sea

2017 ◽  
Vol 36 (4) ◽  
pp. 72-79 ◽  
Author(s):  
Yanmin Wang ◽  
Shaowen Liu ◽  
Feifei Hao ◽  
Yunlong Zhao ◽  
Chunyan Hao
Keyword(s):  
South China Sea ◽  
Continental Margin ◽  
South China ◽  
Gas Hydrate ◽  
The South China Sea ◽  
Stability Zone ◽  
The South ◽  
China Sea ◽  
The North ◽  
Hydrate Stability
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