| Issue |
E3S Web Conf.
Volume 560, 2024
The 10th International Conference on Energy Materials and Environment Engineering (ICEMEE 2024)
|
|
|---|---|---|
| Article Number | 02017 | |
| Number of page(s) | 6 | |
| Section | Water Resources Management and Ecological Environment Control | |
| DOI | https://doi.org/10.1051/e3sconf/202456002017 | |
| Published online | 05 August 2024 | |
Spatial and Temporal Variation of Satellite-Derived Chlorophyll-a in Bohai Sea over the Past 20 Years
1 Department of Mechanics, Tianjin University, Tianjin 300350, China
2 State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China
* Corresponding author: xwang19951111@tju.edu.cn
The Chlorophyll-a (Chl-a) concentration in the surface layer of the Bohai Sea from 2003 to 2022 was obtained after processing the MODIS data with the improved shortwave infrared (SWIR) atmospheric correction algorithm and the Clack three-channel method. Its spatial and temporal variation were analyzed. The results show that it has obvious interannual spatial distribution characteristics, showing a trend of being high in nearshore waters and low in offshore waters, high in the estuarine bays and low in other sea areas. The interannual Chl-a variation shows an inverted U-shape. The year-by-year seasonal average spatial characteristics are basically consistent, with high in nearshore waters and low in other waters. The Chl-a in spring and summer was higher than that in autumn and winter. The temporal trend of the four seasons was similar to the interannual trend, showing an inverted U-shaped trend of first increasing, then stabilizing and then decreasing.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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