基于AIS数据的北印度洋渔船时空活动特征分析-海洋预报

基于AIS数据的北印度洋渔船时空活动特征分析

单位：1. 国家海洋环境预报中心, 北京 100081;
2. 国家海洋环境预报中心自然资源部海洋灾害预报技术重点实验室, 北京 100081

分类号：P715;P724

出版年·卷·期（页码）：2025·42·第一期（48-55）

摘要：

针对海量的分钟级数据，在区域划分上参考中国近海渔区网格划分方法，添加时间要素，在北印度洋区域（48.0°～116.5°E，28.5°N～26.5°S）以统一的时空要素建立网格并作为基础统计单元。以此为基础，统计渔船分布面积和作业时间，并通过几何化处理绘制了时空分布热力图进行分析。结果表明：渔船的分布面积、活动密集程度与时间变量间存在相关性；存在一种划分方式，使得频次分布呈规律性且具备一定的结构特征，该结构特征较稳定，不随时间推移而变化。此外，推测了4个大洋渔场和4条航道的大致地理位置。

For massive minute level data, referring to the grid of China's offshore fishing areas in regional division, time element is added to establish a grid in the northern Indian Ocean region (48.0°~116.5°E, 28.5°N~26.5°S) as basic statistical unit. Based on the statistical unit, this study analyzes the distribution area, calculates operation time, and geometrically draws spatiotemporal distribution heat maps. Results show that there is a correlation between the distribution area of fishing vessels, the frequency of activity density, and time variables. There is a division method that makes the frequency distribution regular with a relative stable time-invariant structural characteristic. In addition, the approximate geographical locations of four oceanic fishing fields and four waterways are also speculated.

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