双前线控制高度河口光衰减的分割参数化:长江河口的分割参数化方案
Zhihao Jiang1, Feng Zhou2, Hao Zheng3
1Ocean College, Zhejiang University, Zhoushan, 316021, China; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China.
The Science of the total environment
|October 7, 2025
概括
长江河口 (CJE) 的前沿形成了不同的区域,影响光学活性成分 (OAC) 和光衰减. 这项研究开发了特定区域的模型,以提高对沿海生态系统动态的理解.
科学领域:
- 海洋光学 海洋光学
- 沿海海洋学 沿海海洋学
- 生物地质化学生物地质化学
背景情况:
- 光学活性成分 (OAC) 的光衰减对海洋生态系统至关重要,特别是在乱的河口附近,如江河口 (CJE).
- 了解OAC分布和光衰减机制对于管理沿海资源和预测生态系统反应至关重要.
研究的目的:
- 为了研究沉积物和羽毛线如何将CJE划分为基于OAC和光衰减的独特子区域.
- 开发和验证扩散衰减系数 (Kd) 的分区域特定参数化方案.
- 将前部动态与初级生产率模式和缺氧易感区域联系起来.
主要方法:
- 综合卫星产品,模拟参数和现场观测数据.
- 利用多线性回归来开发基于悬浮沉积物度 (SSC),叶绿素 (Chl) 和盐度的分区域特定的Kd参数化方案.
- 与传统的非分区模型对开发的模型进行了验证.
主要成果:
- 该CJE被划分为三个子区域 (深度≤20m,20-50m,≥50m),具有不同的OAC分布和光衰减.
- 与未分区模型 (R2=0.46) 相比,分区特定的Kd模型显示出更高的性能 (R2=0.84和0.83).
- 发现双面调节"低-高-低"的初级生产率模式,将高生产率和缺氧区域与富含营养的中间区域联系起来.
结论:
- 额头动力学在沿海生态系统中的生物地球化学梯度结构中发挥着重要作用.
- 开发的空间显式框架改善了对沿海生态系统对环境变化反应的预测.
- 可适应的方法为管理低氧和维持高度河口渔业提供了进步.
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