Suspended Matter Distribution in the Surface Layer of the East Equatorial Atlantic

Bubnova, E. S.; Капустина, М. В.; Krechik, V. А.; Sivkov, Vadim

doi:10.1134/s000143702001004x

Cited by 5 publications

(1 citation statement)

References 19 publications

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“…Suspended matter is all particulate matter present in water in a suspended state and can be divided into two main categories: combustible components (biogenic particles and various flocs) and non-combustible components (sand and mud particles, rock, and mineral fragments) (Bubnova et al, 2020;Chong et al, 2011;Wang, 2014). Suspended matter of terrestrial origin is the main source of the widely distributed muddy deposits in estuaries and shelves (Milliman and Syvitski, 1992).…”

Section: Introductionmentioning

confidence: 99%

Composition and concentration of suspended matter in the Zhongsha Great Atoll, South China Sea, before and during the summer monsoon

Yan,

Du,

et al. 2024

Front. Mar. Sci.

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Suspended matter in seawater carries abundant nutrients and carbon, playing a significant role in carbon cycle and ecosystem in many oceanic settings such as atolls. The Zhongsha Great Atoll (hereafter ZGA), located in the deep South China Sea, sustains a both regionally and globally important ecosystem. Characteristic of the suspended matter in this area, however, remains poorly investigated. Using a data set encompassing temperature, salinity, depth, and suspended matter concentration (hereafter SMC) of seawater collected respectively in May 2019 (spring-summer monsoon transition period) and June 2020 (summer monsoon outbreak period) in the ZGA, the main components and spatial distribution of suspended matter together with their influencing factors were comprehensively analyzed. Our results show that the components of suspended matter vary widely in space and include more than 20 types of materials such as planktonic remains and biogenic siliceous debris. During the transit between spring and summer monsoons, the SMC in seawater was generally low, with an average value of approximately 3.26 mg L-1, which decreased from the surface to the middle layer and then increased to deep waters; Horizontally, the SMC in the west was generally higher than that in the east likely because the wind-driven current transport significant amounts of particles from the east to the west. During the 2020 summer monsoon outbreak, average SMC in this area was 6.27 mg L-1, higher than that during the 2019 spring-summer monsoon transit. Moreover, significantly higher SMC in the 1-100 m layer and lower SMC in the 150 m layer were observed in the west. Owing to the impact of mesoscale eddies, low SMC in the surface layer and high concentrations in the bottom layer can occur in parts of the ZGA, leading to the deepening of the west-high and east-low distribution layers of SMC during the 2020 summer monsoon outbreak. Notably, we for the first time have observed an anomalously high SMC in the 1–100 m layer of the northwest area during the 2020 summer monsoon outbreak. This anomaly is higher than any previously reported values in the South China Sea and can be attributed to the multiple monsoon impacts. Sources of suspended matter, topography, currents, and wind field were identified as the main factors influencing the spatial distribution of SMC in this area. Our findings provide a basic context for understanding the sources and dynamics of suspended material in atolls.

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Section: Introductionmentioning

confidence: 99%

Composition and concentration of suspended matter in the Zhongsha Great Atoll, South China Sea, before and during the summer monsoon

Yan,

Du,

et al. 2024

Front. Mar. Sci.

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Effect of turbulent mixing on the formation of intermediate nepheloid layer over the northern continental slope of the Andaman sea

Ye,

Zhou,

et al. 2024

Deep Sea Research Part I: Oceanographic Research Papers

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Formation Mechanisms and Characteristics of the Marine Nepheloid Layer: A Review

Tian

Liu

Zhang

et al. 2022

Water

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Marine nepheloid layer is widely distributed in the oceans and marginal seas. The concentration of suspended particles in the nepheloid layer is significantly higher than that of the adjacent layers. Marine nepheloid layers include the surface nepheloid layer (SNL), intermediate nepheloid layer (INL), and bottom nepheloid layer (BNL). As a transport pathway for the particulate matter in the oceans, nepheloid layer is important to the carbon cycle and the source–sink system at the continental margin. This paper focused on the characteristics of the marine nepheloid layer and the mechanism of internal solitary waves that form INL and BNL, providing a reference for further research on the marine ecological environment dynamic process and source–sink system. BNL is formed by suspended seabed sediments with strong currents near the bottom, but the fate of BNL remains unknown. Marine nepheloid layer significantly affects the transportation of materials within the ocean. The transport of sediments by ISWs dramatically affects the formation of deep seabed sedimentary landform. However, the formation process and the transport contribution of INL and BNL are still unclear. The systematic and long-term research on the marine nepheloid layer in the world oceans is still limited.

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Suspended Matter Distribution in the Surface Layer of the East Equatorial Atlantic

Cited by 5 publications

References 19 publications

Composition and concentration of suspended matter in the Zhongsha Great Atoll, South China Sea, before and during the summer monsoon

Composition and concentration of suspended matter in the Zhongsha Great Atoll, South China Sea, before and during the summer monsoon

Effect of turbulent mixing on the formation of intermediate nepheloid layer over the northern continental slope of the Andaman sea

Formation Mechanisms and Characteristics of the Marine Nepheloid Layer: A Review

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