海水运动感应磁场对台风的响应特性分析Response Characteristic Analysis of Seawater Motion-Induced Magnetic Field to Typhoon
赵慧,李予国,段双敏,徐震寰
摘要(Abstract):
海水运动感应磁场是海洋电磁数据处理和解释的重要环境背景场。为了解和认识极端天气下海水运动感应磁场的变化特性,本文对台风条件下海水运动感应磁场展开研究。将高精度的区域耦合模式(Coupled Ocean-Atmosphere-Wave-Sediment Transport Modeling System, COAWST)应用于海水运动感应磁场计算中,以台风“格美”(编号201220)为例,估算海水运动感应磁场,探讨台风条件下感应磁场的时空变化特征,定量评估台风对感应磁场的影响范围。研究表明,该台风引起的感应磁场最大达0.8 nT,水平影响范围约200~500 km;台风对感应磁场的影响具有滞后性和持续性;台风影响下海水电导率发生明显变化,对感应磁场具有重要贡献。
关键词(KeyWords): 台风;海水电导率;流速;海水运动感应磁场;时空特性
基金项目(Foundation): 国家自然科学基金(面上项目)(61971385);; 中国电波传播研究所院士基金项目(A172003Y06)资助~~
作者(Author): 赵慧,李予国,段双敏,徐震寰
DOI: 10.16441/j.cnki.hdxb.20210201
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