闽浙沿岸流的季节性扩散及其对近岸海域氮磷的影响

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中图分类号：P736.21；X145 文献标志码：A 文章编号：1005-9857（2025）10-0096-09

Abstract：Based on the marine environmental monitoring data of the coastal waters of Fujian Province from 2019 to 2023 in spring，summer and autumn，the temporal and spatial variations of salinity were analyzed， the seasonal expansion of the Fujian-Zhejiang Coastal Current（FZCC）was studied，and the influence of the FZCC on nitrogen and phosphorus in the coastal waters was analyzed.The results showed that from 2019 to 2023，the salinity in springand summer showed a trend of first increasing，then decreasing，and then increasing，while in autumn it showed a trend of first decreasing，then increasing，and then decreasing. The salinity was higher in spring and autumn，lower in summer.The spatial distribution of salinity showed a paternoflower salinity near thecoast and higher salinityinthefar sea，with higher salinity inthe southern sea areaand lower salinity in the northern sea area.The expansion ofFZCC had obvious seasonal variation characteristics. In spring and autumn，the surface water ofFZCC could affect the sea area near Haitan Island， while in summer it did not affect the coastal waters ofFujian.The planar distribution of DIN and DIP content showed a trendof higher content near the coast and lower content in the outer sea．The DINand DIP content in the influence area ofFZCC was significantly higher than that in other areas．From 2019 to 2023，there were significant seasonal differences for DIN or DIP （ p<0.001 ）.FZCC exerts a greater influence on DIP in affected waters during autumn compared to spring，while the seasonal variations and driving factors of DIN may exhibit higher complexity.Future studies should prioritize enhanced monitoring efforts to improve the spatiotemporal comprehensiveness and integrity of research datasets.

Keywords： Marine environmental science，Fujian-Zhejiang coastal current， Seasonal expansion，Nitrogen and phosphorusinfluence，Coastalwaters

0 引言

闽浙沿岸流是东海陆架区重要的海洋动力现象，主要起源于长江口区域。（剩余8099字）