| 摘要: |
| 根据福建省近岸海域 2019—2023 年春、夏、秋三季的海洋环境监测数据，进行了盐度的时空变化分析，识别了闽浙沿岸流的扩散范围，并分析了闽浙沿岸流对沿海氮、磷的影响。结果 表明：2019—2023 年，春季和夏季盐度均呈现先上升、后下降、再上升的趋势，秋季盐度呈现先下降、后上升、再下降的趋势。春、秋季的盐度较高，夏季盐度最低；盐度的空间分布呈现近 岸盐度低、远海盐度高，南部海域盐度高、北部海域盐度低的格局。闽浙沿岸流扩展具有明显的 季节变化特征，春、秋季闽浙沿岸流表层水可影响至海坛岛、兴化湾口附近海域，夏季未影响福 建近岸海域。DIN、DIP 质量浓度平面分布呈现近岸高、外海低的趋势；闽浙沿岸流影响区域的DIN、DIP 明显高于其他区域。2019—2023 年，对于 DIN 或 DIP，季节之间存在显著的差异性
（p ＜ 0.001），秋季闽浙沿岸流对 DIP 影响比春季更大，DIN 的季节变化与影响因素可能更复杂。未来应加强监测，以提升研究数据时空序列的全面性、完整性。 |
| 关键词: 海洋环境科学 闽浙沿岸流 季节性扩散范围 氮磷影响 近岸海域 |
| DOI：10.20016/j.cnki.hykfygl.2025.10.011 |
| 投稿时间：2025-03-10修订日期：2025-08-26 |
| 基金项目:福建省环保科技计划项目（2021R021，2024R015）. |
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| The Seasonal Expansion of Fujian and Zhejiang Coastal Current and Its Influence on Nitrogen and Phosphorus in the Coastal Waters |
| LIN Jianguo,LI Qingsheng,FU Shifeng,WANG Cui,JIANG Jinlong |
| Fujian Coastal Marine Environmental Monitoring Station |
| 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 spring and 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 pattern of lower salinity near the coast and higher salinity in the far sea，with higher salinity in the southern sea area and lower salinity in the northern sea area．The expansion of FZCC had obvious seasonal variation characteristics．In spring and autumn，the surface water of FZCC could affect the sea area near Haitan Island， while in summer it did not affect the coastal waters of Fujian．The planar distribution of DIN and DIP content showed a trend of higher content near the coast and lower content in the outer sea．The DIN and DIP content in the influence area of FZCC 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. |
| Key words: Marine environmental science,Fujian-Zhejiang coastal current,Seasonal expansion,Nitrogen and phosphorus influence,Coastal waters |
