Spatiotemporal Expansion of Algal Blooms in Coastal China Seas

Zeng, Kai1; Gokul, Elamurugu Alias2,3; Gu, Haifeng2,3; Hoteit, Ibrahim2,3; Huang, Ye4; Zhan, Peng1

2024-05-01

10.1021/acs.est.4c01877

ENVIRONMENTAL SCIENCE & TECHNOLOGY   影响因子和分区

0013-936X

1520-5851

The coastal seas of China are increasingly threatened by algal blooms, yet their comprehensive spatiotemporal mapping and understanding of underlying drivers remain challenging due to high turbidity and heterogeneous water conditions. We developed a singular value decomposition-based algorithm to map these blooms using two decades of MODIS-Aqua satellite data, spanning from 2003 to 2022. Our findings indicate significant algal activity along the Chinese coastline, impacting an average annual area of approximately 1.8 x 10(5) km(2). The blooms exhibit peak intensity in August, while the maximum affected area occurs in September, featuring multifrequency outbreaks in spring, and pronounced large-scale events in summer and autumn. Notably, our analysis demonstrates a robust 67% increase in bloom occurrences over the study period. This expansion is primarily attributed to increased nutrient inflow from terrestrial sources linked to human activity and precipitation, compounded by rising global sea surface temperatures. These spatiotemporal insights are critical for devising effective management strategies and policies to mitigate the impacts of algal blooms.

algal blooms remote sensing singular valuedecomposition coastal China seas

SCI ; EI

英语

第一 ; 通讯

National Key Research and Development Program of China[2022YFC3105800]

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:001231826000001

AMER CHEMICAL SOC

20242216175383

Expansion ; Oceanography ; Remote sensing ; Surface temperature ; Surface waters

Surface Water:444.1 ; Oceanography, General:471.1 ; Thermodynamics:641.1 ; Mathematics:921 ; Materials Science:951

ENVIRONMENT/ECOLOGY

Web of Science

1.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China
2.Minist Nat Resources, Inst Oceanog 3, Xiamen 361005, Peoples R China
3.King Abdullah Univ Sci & Technol KAUST, Earth Sci & Engn, Thuwal 23955, Saudi Arabia
4.East China Normal Univ, Sch Geog Sci, Key Lab Geog Informat Sci, Minist Educ, Shanghai 200241, Peoples R China

Zeng, Kai,Gokul, Elamurugu Alias,Gu, Haifeng,et al. Spatiotemporal Expansion of Algal Blooms in Coastal China Seas[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2024,58:13076-13086.

Zeng, Kai,Gokul, Elamurugu Alias,Gu, Haifeng,Hoteit, Ibrahim,Huang, Ye,&Zhan, Peng.(2024).Spatiotemporal Expansion of Algal Blooms in Coastal China Seas.ENVIRONMENTAL SCIENCE & TECHNOLOGY,58,13076-13086.

Zeng, Kai,et al."Spatiotemporal Expansion of Algal Blooms in Coastal China Seas".ENVIRONMENTAL SCIENCE & TECHNOLOGY 58(2024):13076-13086.