Feeding rhythm of Diaphus chrysorhynchus on the north slope of the South China Sea

2018 ◽  
Vol 25 (2) ◽  
pp. 395
Author(s):  
Zhongyi LI ◽  
Yaoyao YANG ◽  
Yiping YING ◽  
Zuozhi CHEN ◽  
Xinliang WANG ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
The South China Sea ◽  
North Slope ◽  
The South ◽  
China Sea ◽  
The North ◽  
Feeding Rhythm

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.

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>

scholarly journals Intrusion of the North Pacific waters into the South China Sea

2000 ◽  
Vol 105 (C3) ◽  
pp. 6415-6424 ◽  
Author(s):  
Tangdong Qu ◽  
Humio Mitsudera ◽  
Toshio Yamagata
Keyword(s):  
South China Sea ◽  
South China ◽  
North Pacific ◽  
The South China Sea ◽  
The South ◽  
China Sea ◽  
The North ◽  
Pacific Waters ◽  
The North Pacific

scholarly journals Isolation of the South China Sea from the North Pacific Subtropical Gyre since the latest Miocene due to formation of the Luzon Strait

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shaoru Yin ◽  
F. Javier Hernández-Molina ◽  
Lin Lin ◽  
Jiangxin Chen ◽  
Weifeng Ding ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
North Pacific ◽  
The South China Sea ◽  
Global Ocean ◽  
North Pacific Subtropical Gyre ◽  
The South ◽  
China Sea ◽  
The North ◽  
The North Pacific

AbstractThe North Pacific subtropical gyre (NPSG) plays a major role in present global ocean circulation. At times, the gyre has coursed through the South China Sea, but its role in the evolutionary development of that Sea remains uncertain. This work systematically describes a major shift in NPSG paleo-circulation evident from sedimentary features observed in seismic and bathymetric data. These data outline two contourite depositional systems—a buried one formed in the late Miocene, and a latest Miocene to present-day system. The two are divided by a prominent regional discontinuity that represents a major shift in paleo-circulation during the latest Miocene (~ 6.5 Ma). The shift coincides with the further restriction of the South China Sea with respect to the North Pacific due to the formation of the Luzon Strait as a consequence of further northwest movement of the Philippine Sea plate. Before that restriction, data indicate vigorous NPSG circulation in the South China Sea. Semi-closure, however, established a new oceanographic circulation regime in the latest Miocene. This work demonstrates the significant role of recent plate tectonics, gateway development, and marginal seas in the establishment of modern global ocean circulation.

scholarly journals Indonesian Defense Strategy to Encounter Challenges in the Indo-Pacific (Case Study: Hegemonic War of China and the United States of America in the South China Sea)

2021 ◽  
Vol 04 (10) ◽  
Author(s):  
Adhit Prayoga ◽  
Keyword(s):  
United States ◽  
South China Sea ◽  
South China ◽  
United States Of America ◽  
The United States ◽  
The South China Sea ◽  
The South ◽  
Defense Strategy ◽  
China Sea ◽  
The North

As an arena of hegemonic war between China and the United States of America (USA), Indo-Pacific has economic value that can increase conflict in the region. This hegemonic war then cultivated rapidly, as evidenced by the expanded issue through the involvement of other countries such as France, Germany, and England. This research basically examined the actions of Indonesia as a non-claimant country in conducting defense strategy to prevent threats that can disrupt its territory, especially in the North Natuna Sea which is adjacent to the South China Sea as the main theater of this hegemonic war in Indo-Pacific. This study was analysed using qualitative method, descriptive analysis and neorealism perspective. As an effort to maintain territorial sovereignty, especially in the North Natuna Sea which is close to South China Sea, Indonesia had done several defense strategies which can be categorized as internal and external balancing. Internal balancing consists of relocation process of fishermen from North Coast of Java to Natuna, increasing trend of defense budget and particular allocation for the security of North Natuna Sea, and execution of combat exercise. External balancing includes cooperation of joint exercises and national defense industry quality improvement through transfer of technology and knowledge, joint development, as well as acquisitions.

scholarly journals Submarine Geomorphological Features and Their Origins Analyzed from Multibeam Bathymetry Data in the South China Sea

2021 ◽  
Vol 9 (12) ◽  
pp. 1419
Author(s):  
Xiaolin Ou ◽  
Junjiang Zhu ◽  
Sanzhong Li ◽  
Yonggang Jia ◽  
Zhongjia Jia ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
The South China Sea ◽  
Internal Solitary Waves ◽  
The South ◽  
China Sea ◽  
The North ◽  
Local Areas ◽  
Dongsha Atoll ◽  
Geomorphological Features

We processed the raw multi-beam bathymetry data acquired in the central and northeastern part of the South China Sea by eliminating noise and abnormal water depth values caused by environmental factors, and a high resolution bathymetric map with a 20-m grid interval was constructed. Various scales of seafloor geomorphological features were identified from the data, including an image of Shenhu canyon, which is located in the northern continental margin of the South China Sea; submarine reticular dunes in the north of the Dongsha atoll; submarine parallel dunes in the northeast of the Dongsha atoll; and several seamounts in the southwest sub-basin and in the east sub-basin. In the processing step, various anomalies in the multi-beam bathymetry data were corrected. The optimal swath filtering and surface filtering methods were chosen for different scales of seafloor topography in order to restore the true geomorphological features. For the large-scale features with abrupt elevation changes, such as seamounts (heights of ~111–778 m) and submarine canyons (incision height of ~90–230 m), we applied swath filtering to remove noise from the full water depth range of the data, and then surface filtering to remove small noises in the local areas. For the reticular dunes and parallel dunes (heights of ~2–32 m), we applied only surface filtering to refine the data. Based on the geometries of the geomorphological features with different scales, the marine hydrodynamic conditions, and the regional structure in the local areas, we propose that the Shenhu submarine canyon was formed by turbidity current erosion during the Sag subsidence and the sediment collapse. The submarine reticular dunes in the north of the Dongsha atoll were built by the multi-direction dominant currents caused by the previously recognised internal solitary waves around the Dongsha atoll. The submarine parallel dunes in the northeast of the Dongsha atoll were built by the repeated washing of sediments with the influence of the tidal currents and internal solitary waves. The conical, linear and irregular seamounts identified from the bathymetry data were formed during the spreading of the southwest sub-basin and the east sub-basin. The identified seamounts in the multi-beam bathymetry data are correlated to deep magmatic activities, the Zhongnan transform fault and the NE-trending faults.

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