双多普勒雷达风场反演技术在两次上海登陆台风中的应用分析-海洋预报

双多普勒雷达风场反演技术在两次上海登陆台风中的应用分析

单位：1. 上海中心气象台, 上海 200030;
2. 上海海洋中心气象台, 上海 200030

分类号：P732

出版年·卷·期（页码）：2025·42·第五期（52-62）

摘要：

探讨了利用三维变分方法进行双多普勒雷达风场反演，并将相关结果应用于上海近海登陆台风中心定位的方法。首先利用区域递归多普勒退速度模糊算法，对单雷达进行径向风场退速度模糊处理，而后选取最邻近台风中心的两部多普勒天气雷达，基于三维变分方法进行双雷达联合反演格点风场，据此进行高时间频次的台风中心定位。研究结果表明：三维变分双雷达风场反演方法能够有效刻画台风的环流结构，同时具备时空分辨率高、定位精准等特点。基于该方法的台风定位结果与中央气象台定位结果偏差较小。

This article explores a method for locating typhoon centers near Shanghai using a dual Doppler radar wind field inversion technique based on three-dimensional variational data assimilation（3 DVAR）. Initially, the Region-based Recursive Doppler Dealiasing（R2D2） algorithm is employed to correct radial wind field deblurring for single radar. Subsequently, the two nearest Doppler weather radars are selected to collaboratively invert the gridded wind field using 3 DVAR, and thus carry out high-frequency positioning of the typhoon center. The research results demonstrate that the 3 DVAR dual radar wind field inversion method effectively captures the circulation structure of typhoons, while also featured by high spatiotemporal resolution and precise positioning.The typhoon positioning results derived from 3 DVAR method have a small deviation from those provided by the Central Meteorological Observatory.

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