NSSC OpenIR  > 空间科学部
Alternative TitleTime-dependent simulation and result validation of interplanetary solar wind
李会超; 冯学尚; 向长青
Source Publication地球物理学报
Keyword磁流体力学 太阳风 数值模拟 数据驱动 结果评估


Other Abstract

The ambient solar wind has critical influence on the space environment near the Earth. Three dimensional magnetohydrodynamics solar wind model is an important tool for research and forecast of ambient solar wind. Employing boundary condition driven by solar photospheric magnetic field observation, we develop a time-dependent three dimensional magnetohydrodynamics interplanetary solar wind model. Using this model, we simulate the ambient solar wind of Year 2008, and analyze the evolution of global solar wind structures and the connection between interplanetary in-situ measurements and corona structures during that year. We realize a set of procedures, which evaluate the quality of predictions for both continuous solar wind parameters and characteristic structures of the solar wind. The evaluation results indicate that our model satisfactorily reproduces the large scale structure of the ambient solar wind during Year 2008. The correlation coefficient between observed and simulated speed is higher than 0. 6. The strength of simulated interplanetary magnetic field matches observation well. All interplanetary magnetic field reverses and 82. 76% of the stream interaction regions are captured by our model. The false alarm rate of the interplanetary magnetic field reverse prediction is only 6. 67% while that of the stream interaction region is only 11.11%. The errors in predicting the arrival time of these two structures are about 1 day. Through comprehensive analysis of the evaluation result, we also gain understanding of the major issue of model improvement, including the structure of the high speed flow and the distribution of magnetic field at the inner boundary.

Indexed BySCI ; EI ; CSCD
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Document Type期刊论文
Corresponding Author李会超
Recommended Citation
GB/T 7714
李会超,冯学尚,向长青. 时变行星际太阳风模拟及其结果评估[J]. 地球物理学报,2019,62(1):1-18.
APA 李会超,冯学尚,&向长青.(2019).时变行星际太阳风模拟及其结果评估.地球物理学报,62(1),1-18.
MLA 李会超,et al."时变行星际太阳风模拟及其结果评估".地球物理学报 62.1(2019):1-18.
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