李沐^1,2,,
何飞^3,,,
林瑞淋⁴,
张效信²
1. 云南大学资源环境与地球科学学院, 昆明 650091
2. 国家卫星气象中心空间天气重点实验室, 北京 100081
3. 中国科学院地球与行星物理重点实验室, 中国科学院地质与地球物理研究所, 北京 100029
4. 中国科学院国家空间科学中心, 北京 100190

基金项目: 国家自然科学基金（41774152，41931073）资助


详细信息

作者简介: 李沐, 女, 1994年生, 硕士研究生, 从事地磁扰动方面研究.E-mail:limuu@qq.com

通讯作者: 何飞, 男, 1984年生, 副研究员, 博士, 从事地球与行星磁层研究.E-mail:hefei@mail.iggcas.ac.cn

中图分类号: P352

收稿日期:2019-10-16
修回日期:2020-01-02
上线日期:2020-06-25

Prediction of the geomagnetic disturbances in high-latitude region with Weimer model

LI Mu^1,2,,
HE Fei^3,,,
LIN RuiLin⁴,
ZHANG XiaoXin²
1. School of Resource Environment and Earth Science, Yunnan University, Kunming 650091, China
2. Key Laboratory of Space Weather, National Center for Space Weather, China Meteorological Administration, Beijing 100081, China
3. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
4. National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China


More Information

Corresponding author: HE Fei,E-mail:hefei@mail.iggcas.ac.cn

MSC: P352

--> Received Date: 16 October 2019
Revised Date: 02 January 2020
Available Online: 25 June 2020


摘要
摘要:地磁扰动是空间天气中的重要现象，对地基技术系统具有重要的影响.准确预报地磁扰动可以有效避免重大灾害发生.本文基于Weimer电势和磁势模型发展了高纬地区地磁扰动的模拟方法，并与地面台站观测数据进行了比较.地表磁场扰动主要受电离层电流系统的影响，利用Weimer模式计算出电离层等效电流分布后，基于毕奥-萨伐尔定律推导了地磁扰动三分量与电流的关系，最终计算出地磁扰动量.模型的输入参数为太阳风速度、太阳风密度、行星际磁场和磁偶极倾角.模型计算结果与不同纬度和经度的地磁台站观测结果对比表明本文的计算方法能有效地模拟地磁暴期间地磁扰动特征.本文结果对今后发展高纬地区地磁场预报模型奠定了重要基础.
关键词: 磁暴/
太阳风/
地磁扰动/
Weimer模型/
预测

Abstract:Geomagnetic disturbance is an important space weather phenomenon and has great impacts on ground-based technical systems. Accurate prediction of the geomagnetic disturbances can effectively prevent and mitigate major disasters. Based on the Weimer electric potential and magnetic potential model, this paper developed a method to predict the geomagnetic disturbances in high-latitude regions, and the simulation results are compared with observations from the ground-based stations. The geomagnetic disturbances on the ground are mainly induced by the ionospheric current system, which is modeled with the Weimer model. Then the three components of the geomagnetic disturbances are calculated using the Biot-Savart Law. The input parameters of the model are upstream solar wind speed, solar wind number density, interplanetary magnetic field and dipole tilt angle. Comparisons between the simulations and the observations at different latitudes and longitudes indicate that the method proposed in this paper can effectively predict the geomagnetic disturbances during geomagnetic storms. The results in this paper provide important basis for future development of a comprehensive prediction model for the geomagnetic disturbances in high-latitude regions.
Key words:Geomagnetic storm/
Solar wind/
Geomagnetic disturbance/
Weimer model/
Prediction



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