Comparative study on the characteristics of marine bloom events in two representative areas of the South China Sea

Gao Xinyu; Wang Tianhao; Su Hua; Wu Wenting; Lu Wenfang

doi:10.12284/hyxb2023058

Volume 45 Issue 5

May 2023

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Gao Xinyu，Wang Tianhao，Su Hua, et al. Comparative study on the characteristics of marine bloom events in two representative areas of the South China Sea[J]. Haiyang Xuebao，2023, 45(5)：90–106 doi: 10.12284/hyxb2023058

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Comparative study on the characteristics of marine bloom events in two representative areas of the South China Sea

doi: 10.12284/hyxb2023058

Gao Xinyu^1
,,
Wang Tianhao¹,
Su Hua¹,
Wu Wenting¹,
Lu Wenfang^{2, 3
,
,}

1.
The Academy of Digital China, Fuzhou University, Fuzhou 350002, China
2.
School of Marine Sciences, Sun Yat-Sen University, Zhuhai 519000, China
3.
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China

Received Date: 2022-08-08
Rev Recd Date: 2022-11-17

Available Online: 2022-12-08

Publish Date: 2023-05-01

Abstract

Abstract

Quantitative analysis on the properties of marine phytoplankton bloom events is helpful to understand the marine ecology, environment, and dynamic processes. In the South China Sea, remote sensing is vulnerable to clouds. Previous studies were mostly conducted with discontinuous observation or remote sensing data, which failed to comprehensively understand the characteristics and controlling factors of marine bloom events in the South China Sea. This study applied the statistical framework for defining marine heat waves, based on previously reconstructed daily full coverage remotely sensed chlorophyll a product from 2005 to 2019, to extract marine bloom events in two representative subregions, i.e., the northwestern Luzon in winter and southeastern Vietnam in summer. The duration, intensity, and corresponding long-term trends of marine bloom events in the two representative sea areas were analyzed. The results showed that the bloom frequency in the Luzon Strait has decreased, while the intensity has increased. These trends were significant in most areas for the winter Luzon Strait, while the trends for most of the summer Vietnam coasts were not significant. We further analyzed the influencing factors of marine bloom events and found that the winds (positive correlation) and sea surface temperature (negative correlation) had the greatest impacts on the bloom events. In both two representative sea areas, the marine bloom events were mainly dominated by upwelling, and the wind was the most important influencing factor. Analysis on the precursor conditions of marine bloom events found that the sub-mesoscale activity represented by the temperature front is also an important influencing factor. The study applied in South China Sea as a case study, as well can provide a new perspective to study marine ecosystem and environment.
- South China Sea,
- marine bloom event,
- gap-free remote sensing product,
- long-term trend,
- influencing factors

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References(51)

References

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