文献类型：期刊文献

英文题名：Spatiotemporal distribution of chlorophyll-a concentration in the south China sea and its possible environmental regulation mechanisms

作者：Wei, Xijun[1,3,4];Zhao, Hui[1,2,3,4]

机构：[1]Guangdong Ocean Univ, Coll Chem & Environm Sci, Zhanjiang, Peoples R China;[2]Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China;[3]Guangdong Ocean Univ, Res Ctr Coastal Environm Protect & Ecol Resilience, Zhanjiang, Peoples R China;[4]Guangdong Ocean Univ, Cooperat Res Ctr Nearshore Marine Environm Change, Zhanjiang, Peoples R China

年份：2025

卷号：204

外文期刊名：MARINE ENVIRONMENTAL RESEARCH

收录：SCI-EXPANDED(收录号：WOS:001413621100001)、、EI(收录号：20245017523597)、Scopus(收录号：2-s2.0-85211643773)、WOS

基金：The present research is supported by the National Natural Science Foundation of China (No. 42076162) , and the project was supported by the Innovation Group Project of Southern MarineScience and Engineering Guangdong Laboratory (Zhuhai) (No. 311020004) , and Guangdong Ocean University Student Innovation and Entrepreneurship Training Project (NO. 010403122106) . We thank GlobColor's Working Group for the chlorophyll concentration data and aerosol optical thickness data (https://hermes.acri.fr/) , and European Centre for Medium-Range Weather Forecasts for providing monthly sea surface temperature data and 10 m wind speed data (https://cds.climate.coper nicus.eu/) .

语种：英文

外文关键词：Sea surface temperature; Sea surface wind; Aerosol; Chlorophyll-a; South China sea; Spatiotemporal variation

外文摘要：In this paper, the spatial and temporal distribution of chlorophyll-a (Chl-a) concentration in the South China Sea (SCS) and its major environmental regulator mechanisms were studied by using satellite remote sensing data sea surface temperature (SST), sea surface wind (SSW), and aerosol optical depth (AOD) spanning from January 2000 to December 2022. The results show that Chl-a in the SCS exhibit notable spatio-temporal variations: they peak in winter (similar to 0.234 mg m(-3)) and autumn (similar to 0.156 mg m(-3)), and decline in spring (similar to 0.144 mg m(-3)) and summer (similar to 0.136 mg m(-3)). Spatially, Chl-a near the coast and in upwelling areas are generally higher than those in offshore areas. A monthly average time series correlation analysis across the entire SCS shows that Chl-a significantly correlate with SST (R = -0.78, P <0.01) and SSW (R = 0.78, P < 0.01), and moderately correlate with AOD (R = 0.29, P < 0.01). The regulator of environmental factors also shows seasonal differences: during the winter monsoon period, Chl-a has the highest partial correlation with SSW (R = 0.73, P < 0.01), followed by SST (R = -0.55, P < 0.01), and no significant partial correlation with AOD (R = 0.14, P > 0.05); during the summer monsoon period, Chl-a has the highest partial correlation with SST (R = -0.63, P < 0.01), followed by AOD (R = 0.40, P < 0.01), and no significant partial correlation with SSW (R = 0.12, P > 0.05). A comprehensive analysis indicates that the mixing and upwelling processes regulated by the winter monsoon and SST exert a greater influence on nutrient variations. The enhanced mixing caused by the winter monsoon and the cold environment promote the growth of phytoplankton, leading to higher Chl-a concentrations in winter compared to other seasons. In contrast, the increased temperature in the summer monsoon period significantly weakens the mixing effect of wind speed and nutrients influx from deep layers to surface layers. Consequently, the external nutrient sourced from aerosol becomes crucial in determining Chl-a distribution, especially in oligotrophic regions near the southern SCS and the basin. However, in regions where other nutrient sources significantly contribute, such as the coastal areas influenced by seasonal upwelling, the contribution of aerosols is negligible.