The modification of water column conditions in the Gulf of Thailand by the influences of the South China Sea and monsoonal winds

2016 ◽  
Vol 118 ◽  
pp. 100-110 ◽  
Author(s):  
Anukul Buranapratheprat ◽  
Pontipa Luadnakrob ◽  
Tetsuo Yanagi ◽  
Akihiko Morimoto ◽  
Fangli Qiao
Keyword(s):  
South China Sea ◽  
Water Column ◽  
South China ◽  
The South China Sea ◽  
Gulf Of Thailand ◽  
The South ◽  
China Sea ◽  
The Gulf Of Thailand

scholarly journals Tidal resonance in the Gulf of Thailand

2018 ◽  
Author(s):  
Xinmei Cui ◽  
Guohong Fang ◽  
Di Wu
Keyword(s):  
South China Sea ◽  
South China ◽  
Channel Model ◽  
The South China Sea ◽  
Gulf Of Thailand ◽  
The South ◽  
China Sea ◽  
Quarter Wavelength ◽  
The Gulf Of Thailand ◽  
Resonant Period

Abstract. The Gulf of Thailand is dominated by diurnal tides, which indicates that the resonant period of the gulf is potentially close to one day. However, when applied to the gulf, the classic quarter wavelength resonant theory fails to give a diurnal resonant period. In this study, we first perform a series of numerical experiments showing that the resonant period of the gulf is approximately one day and that the resonance of the South China Sea body has a critical impact on the resonance of the gulf. In contrast, the resonance of the Gulf of Thailand has little influence on the resonance of the South China Sea body. An idealised two-channel model that can reasonably explain the dynamics of the tidal resonance in the Gulf of Thailand is then established in this study.

scholarly journals Tidal resonance in the Gulf of Thailand

Ocean Science ◽  
2019 ◽  
Vol 15 (2) ◽  
pp. 321-331 ◽  
Author(s):  
Xinmei Cui ◽  
Guohong Fang ◽  
Di Wu
Keyword(s):  
South China Sea ◽  
Resonant Frequency ◽  
South China ◽  
The South China Sea ◽  
Gulf Of Thailand ◽  
The South ◽  
Resonance Theory ◽  
China Sea ◽  
Main Area ◽  
The Gulf Of Thailand

Abstract. The Gulf of Thailand is dominated by diurnal tides, which might be taken to indicate that the resonant frequency of the gulf is close to one cycle per day. However, when applied to the gulf, the classic quarter-wavelength resonance theory fails to yield a diurnal resonant frequency. In this study, we first perform a series of numerical experiments showing that the gulf has a strong response near one cycle per day and that the resonance of the South China Sea main area has a critical impact on the resonance of the gulf. In contrast, the Gulf of Thailand has little influence on the resonance of the South China Sea main area. An idealized two-channel model that can reasonably explain the dynamics of the resonance affecting the Gulf of Thailand is then established in this study. We find that the resonant frequency around one cycle per day in the main area of the South China Sea can be explained with the quarter-wavelength resonance theory, and the large-amplitude response at this frequency in the Gulf of Thailand is basically a passive response of the gulf to the increased amplitude of the wave in the southern portion of the main area of the South China Sea.

Contrasting demographic patterns of Ceriops tagal (Rhizophoraceae) populations in the South China Sea

2011 ◽  
Vol 59 (6) ◽  
pp. 523 ◽  
Author(s):  
Pei-Chun Liao ◽  
Shih-Ying Hwang ◽  
Shong Huang ◽  
Yu-Chung Chiang ◽  
Jenn-Che Wang
Keyword(s):  
South China Sea ◽  
South China ◽  
Demographic History ◽  
The South China Sea ◽  
Gulf Of Thailand ◽  
The South ◽  
Mangrove Species ◽  
China Sea ◽  
The Gulf Of Thailand ◽  
Ceriops Tagal

Demographic history and dispersal ability are significant factors in determining the genetic composition of a population. In this study, we examined the phylogeographic patterns of Ceriops tagal from the Hainan Island and the Gulf of Thailand in the South China Sea, where there are abundant mangrove species. Nucleotide variations in two chloroplast DNA spacers were compared with trace Ceriops propagule dispersal routes and demographic history. An analysis of Templeton, Crandall and Sing’s (TCS) parsimonious networks and population demographics suggests that the Ceriops population gradually expanded from the northern parts of the South China Sea to the south-western populations in the Gulf of Thailand. Such phylogeographic inferences reflect a postglacial southward shift in the mangrove genetic diversity centre and a connection between the demographic dynamics and the coastal range expansion caused by the sea-level rise in the Pleistocene. Therefore, the phylogeographic pattern and historical demography of mangrove species were affected by glaciations during the Pleistocene such as temperate biota.

Constraining barium isotope fractionation in the upper water column of the South China Sea

2020 ◽  
Vol 288 ◽  
pp. 120-137
Author(s):  
Zhimian Cao ◽  
Yating Li ◽  
Xinting Rao ◽  
Yang Yu ◽  
Ed C. Hathorne ◽  
...  
Keyword(s):  
South China Sea ◽  
Water Column ◽  
South China ◽  
Isotope Fractionation ◽  
The South China Sea ◽  
The South ◽  
China Sea ◽  
Barium Isotope

scholarly journals Coccolithophore responses to environmental variability in the South China Sea: species composition and calcite content

2016 ◽  
Vol 13 (16) ◽  
pp. 4843-4861 ◽  
Author(s):  
Xiaobo Jin ◽  
Chuanlian Liu ◽  
Alex J. Poulton ◽  
Minhan Dai ◽  
Xianghui Guo
Keyword(s):  
South China Sea ◽  
Species Composition ◽  
Water Column ◽  
South China ◽  
Water Samples ◽  
Environmental Variability ◽  
Emiliania Huxleyi ◽  
The South China Sea ◽  
The South ◽  
China Sea

Abstract. Coccolithophore contributions to the global marine carbon cycle are regulated by the calcite content of their scales (coccoliths) and the relative cellular levels of photosynthesis and calcification rates. All three of these factors vary between coccolithophore species and with response to the growth environment. Here, water samples were collected in the northern basin of the South China Sea (SCS) during summer 2014 in order to examine how environmental variability influenced species composition and cellular levels of calcite content. Average coccolithophore abundance and their calcite concentration in the water column were 11.82 cells mL−1 and 1508.3 pg C mL−1, respectively, during the cruise. Water samples can be divided into three floral groups according to their distinct coccolithophore communities. The vertical structure of the coccolithophore community in the water column was controlled by the trophic conditions, which were regulated by mesoscale eddies across the SCS basin. The evaluation of coccolithophore-based calcite in the surface ocean also showed that three key species in the SCS (Emiliania huxleyi, Gephyrocapsa oceanica, Florisphaera profunda) and other larger, numerically rare species made almost equal contributions to total coccolith-based calcite in the water column. For Emiliania huxleyi biometry measurements, coccolith size positively correlated with nutrients (nitrate, phosphate), and it is suggested that coccolith length is influenced by light and nutrients through the regulation of growth rates. Larger-sized coccoliths were also linked statistically to low pH and calcite saturation states; however, it is not a simple cause and effect relationship, as carbonate chemistry was strongly co-correlated with the other key environmental factors (nutrients, light).

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