Three-dimensional spatial interpolation for chlorophyll-a and its application in the Bohai Sea

Assessing the health of coastal ecosystems is crucial for maintaining ecological balance. One significant indicator of water eutrophication is the distribution of chlorophyll- a (Chl- a ), which makes obtaining a complete three-dimensional spatial distribution of Chl- a essential for assessment. Thi...

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Veröffentlicht in:Scientific reports 2023-05, Vol.13 (1), p.7930-7930, Article 7930
Hauptverfasser: Zhao, Zihan, Xiao, Rushui, Guo, Junting, Zhang, Yuming, Zhang, Shufang, Lv, Xianqing, Shi, Honghua
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Sprache:eng
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Zusammenfassung:Assessing the health of coastal ecosystems is crucial for maintaining ecological balance. One significant indicator of water eutrophication is the distribution of chlorophyll- a (Chl- a ), which makes obtaining a complete three-dimensional spatial distribution of Chl- a essential for assessment. This study utilized the linear radial basis function (RBF-Linear) method to obtain a comprehensive and reasonable spatial distribution of Chl- a . The method was applied to obtain the three-dimensional spatial field of Chl- a concentration in the Bohai Sea in March, May, August, and October from 2016 to 2018. The distribution pattern of Chl- a concentration in the Bohai Sea displayed characteristic spatial and temporal variations. Spatially, high Chl- a concentration was most concentrated in coastal waters, particularly in estuaries and mariculture areas. Temporally, there were two peaks in March and August. The total Chl- a and areas with high Chl- a concentration in four sub-regions of the Bohai Sea were also calculated to enable a comprehensive assessment of the marine ecological environment. By analyzing the temporal and spatial variation of Chl- a in the Bohai Sea and evaluating the marine ecological environment, we confirmed the feasibility and rationality of RBF-Linear. Our findings have the potential to contribute to improve the accuracy of ecological models and assessment of the satellite products.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-023-35123-6