陈法锦,劳齐斌,周欣,王超,黄超,陆旋,陈淳青,蔡尚均,刘思海

• 1:广东海洋大学海洋与气象学院
• 2:广东海洋大学化学与环境学院
• 3:集美大学极地与海洋研究院

摘要(Abstract)：

【目的】台风作为强动力天气过程，能显著影响海洋生态环境和碳汇格局。然而，基于卫星遥感和现场实测的研究，存在两种不同的观点：前者普遍观测到台风后藻华现象，认为台风增强海洋碳汇；而后者则发现有机物降解常为主导过程，指示近海可能成为碳源。结合文献分析，厘清台风对湛江湾生态环境和碳汇效应的具体影响。【方法】以我国台风登陆频率较高的湛江湾为研究区域，基于超过10次台风现场航次观测数据，系统综述台风对其水动力过程和生态环境的影响。【结果】台风路径是调控湛江湾水动力与营养盐输运的关键，左侧登陆台风驱动向岸流形成强锋面，滞留营养盐并加剧湾内富营养化风险，对河口湾内水产养殖的影响显著；右侧登陆台风促进水体与营养盐向湾外输出。在生物地球化学层面，台风触发的强烈降解作用主要表现为对颗粒有机物的降解过程，沉积物碳埋藏效率约5%，远低于一般河口及近岸区域10%～15%的水平。同时，台风通过增强硝化—反硝化作用，提升氮移除效率及温室气体氧化亚氮排放通量。【结论】虽然台风在短期内可能刺激初级生产，但其所引发的强烈降解过程总体削弱了河口湾的碳汇潜力。

关键词(KeyWords)： 台风;营养盐;有机物;氮循环;碳埋藏

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(42276047);; 广东省基础与应用基础研究基金(2024A1515110183)

作者(Author): 陈法锦,劳齐斌,周欣,王超,黄超,陆旋,陈淳青,蔡尚均,刘思海

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