A novel algorithm for automatic tropical cyclone eye fix using Doppler radar data
A novel algorithm for automatic tropical cyclone eye fix using Doppler radar data
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DOI：
10.1002/met.5
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发表时间：
2007-03
影响因子：
2.7
通讯作者：
K. Wong;Chi Lap Yip;Ping Wah Li
中科院分区：
文献类型：
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作者：
K. Wong;Chi Lap Yip;Ping Wah Li
热带气旋（TC）是最具破坏性的天气现象之一。发布热带气旋早期预警的一个关键要素是对热带气旋环流中心（即“眼”）位置的准确和及时了解。然而，在实际操作中，热带气旋雷达眼的定位往往是手动进行的，预报员之间的结果可能会有所不同。在本文中，描述了一种新的运动场结构分析方法，以帮助更准确地定位热带气旋眼。该方法是综合性的，可以处理不完整的数据和登陆情况。在标准台式计算机上实施时，对于完全在雷达图像内的热带气旋，在墨卡托投影地图上获得的纬度/经度平均误差为0.15度。这完全在不同热带气旋预警中心给出的相对误差范围内。该方法提供了一个独立和客观的信息来源，以协助预报员确定热带气旋中心。版权所有©2007英国皇家气象学会
Tropical cyclone (TC) is among the most destructive of weather phenomena. A key element in issuing early TC warnings is an accurate and timely knowledge of the location of the circulation centre, or ‘eye’, of the TC. However, TC radar eye fix is often carried out manually in practice, and results may vary among forecasters. In this paper, a novel motion field structure analysis method is described as an aid to locate TC eyes more accurately. The method is comprehensive, and can handle incomplete data and landfalling cases. Implemented on a standard desktop computer, an average error of 0.15 degrees in latitude/longitude on a Mercator Projection map for TCs that are completely inside the radar image is obtained. This is well within the relative errors given by different TC warning centres. The method provides an independent and objective source of information to assist forecasters to fix the TC centre. Copyright © 2007 Royal Meteorological Society