Time-dependent MHD modeling of the global solar corona for year 2007: Driven by daily-updated magnetic field synoptic data

	Time-dependent MHD modeling of the global solar corona for year 2007: Driven by daily-updated magnetic field synoptic data
	Yang, L. P.; Feng, X. S.; Xiang, C. Q.; Liu, Yang; Zhao, Xuepu; Wu, S. T.
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2012
卷号	117 页码:A08110
ISSN号	0148-0227
通讯作者	Yang, LP (reprint author), Chinese Acad Sci, SIGMA Weather Grp, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China.
中文摘要	In this paper, we develop a time-dependent MHD model driven by the daily-updated synoptic magnetograms (MHD-DUSM) to study the dynamic evolution of the global corona with the help of the 3D Solar-Interplanetary (SIP) adaptive mesh refinement (AMR) space-time conservation element and solution element (CESE) MHD model (SIP-AMR-CESE MHD Model). To accommodate the observations, the tangential component of the electric field at the lower boundary is specified to allow the flux evolution to match the observed changes of magnetic field. Meanwhile, the time-dependent solar surface boundary conditions derived from the method of characteristics and the mass flux limit are incorporated to couple the observation and the 3D MHD model. The simulated evolution of the global coronal structure during 2007 is compared with solar observations and solar wind measurements from both Ulysses and spacecrafts near the Earth. The MHD-DUSM model is also validated by comparisons with the standard potential field source surface (PFSS) model, the newly improved Wang-Sheeley-Arge (WSA) empirical formula, and the MHD simulation with a monthly synoptic magnetogram (MHD-MSM). Comparisons show that the MHD-DUSM results have good overall agreement with coronal and interplanetary structures, including the sizes and distributions of coronal holes, the positions and shapes of the streamer belts, and the transitions of the solar wind speeds and magnetic field polarities. The MHD-DUSM results also display many features different from those of the PFSS, the WSA, and the MHD-MSM models.
英文摘要	In this paper, we develop a time-dependent MHD model driven by the daily-updated synoptic magnetograms (MHD-DUSM) to study the dynamic evolution of the global corona with the help of the 3D Solar-Interplanetary (SIP) adaptive mesh refinement (AMR) space-time conservation element and solution element (CESE) MHD model (SIP-AMR-CESE MHD Model). To accommodate the observations, the tangential component of the electric field at the lower boundary is specified to allow the flux evolution to match the observed changes of magnetic field. Meanwhile, the time-dependent solar surface boundary conditions derived from the method of characteristics and the mass flux limit are incorporated to couple the observation and the 3D MHD model. The simulated evolution of the global coronal structure during 2007 is compared with solar observations and solar wind measurements from both Ulysses and spacecrafts near the Earth. The MHD-DUSM model is also validated by comparisons with the standard potential field source surface (PFSS) model, the newly improved Wang-Sheeley-Arge (WSA) empirical formula, and the MHD simulation with a monthly synoptic magnetogram (MHD-MSM). Comparisons show that the MHD-DUSM results have good overall agreement with coronal and interplanetary structures, including the sizes and distributions of coronal holes, the positions and shapes of the streamer belts, and the transitions of the solar wind speeds and magnetic field polarities. The MHD-DUSM results also display many features different from those of the PFSS, the WSA, and the MHD-MSM models.
学科主题	空间物理
收录类别	SCI
资助信息	973 program [2012CB825601]; Chinese Academy of Sciences [KZZD-EW-01-4]; National Natural Science Foundation of China [40921063, 40890162, 41031066, 40904049, 41004082]; Specialized Research Fund for State Key Laboratories; NASA; National Science Foundation (USA)
语种	英语
公开日期	2014-12-15
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/3103]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Yang, L. P.,Feng, X. S.,Xiang, C. Q.,et al. Time-dependent MHD modeling of the global solar corona for year 2007: Driven by daily-updated magnetic field synoptic data[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2012,117:A08110.
APA	Yang, L. P.,Feng, X. S.,Xiang, C. Q.,Liu, Yang,Zhao, Xuepu,&Wu, S. T..(2012).Time-dependent MHD modeling of the global solar corona for year 2007: Driven by daily-updated magnetic field synoptic data.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,117,A08110.
MLA	Yang, L. P.,et al."Time-dependent MHD modeling of the global solar corona for year 2007: Driven by daily-updated magnetic field synoptic data".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 117(2012):A08110.