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Automatic tropical cyclone eye fix using genetic algorithm

机译:使用遗传算法的自动热带气旋眼修复

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摘要

Tropical cyclones (TCs) are weather systems with vast destructive power. To forecast TC tracks, forecasters need to locate their circulation centers, or eyes. This eye fix process is often done manually in practice. Since subjective elements are involved in the process, forecasters could disagree on the results even when multiple factors are considered. This paper presents an objective TC eye fix method that utilizes genetic algorithm to search for the optimal values of a six-parameter TC model. The results of this study indicate that the proposed method gives the best average error of 0.127° in latitude/longitude on Mercator projected map with respect to the best track data. This is well within the relative errors of about 0.3° from the results of different TC warning centers. The method can process 6 min of radar data in about 10 s when implemented on a notebook computer, meeting practical real time constraints. It provides a practical, independent and objective source of information to assist forecasters to fix TC eye centers.
机译:热带气旋(TC)是具有巨大破坏力的天气系统。要预测TC轨迹,预报员需要确定其流通中心或眼睛。在实践中,通常是手动完成此固定眼睛的过程。由于该过程涉及主观因素,因此即使考虑了多个因素,预测人员也可能会不同意结果。本文提出了一种客观的TC眼动定焦方法,该方法利用遗传算法搜索六参数TC模型的最佳值。这项研究的结果表明,相对于最佳轨道数据,该方法在墨卡托投影地图上给出的经纬度最佳平均误差为0.127°。根据不同的TC警告中心的结果,这完全在大约0.3°的相对误差范围内。当在笔记本计算机上实现时,该方法可以在大约10 s内处理6分钟的雷达数据,满足实际的实时约束。它提供了实用,独立和客观的信息资源,以帮助预报员修复TC眼科中心。

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