Plasma and Magnetic-Field Characteristics of Magnetic Decreases in the Solar Wind at 1 AU: Cluster-C1 Observations
文献类型：期刊论文
| 作者 | Xiao, T.1,2; Shi, Q. Q.1; Tian, A. M.1; Sun, W. J.3; Zhang, H.4; Shen, X. C.1; Shang, W. S.1; Du, A. M.5 |
| 刊名 | SOLAR PHYSICS
 |
| 出版日期 | 2014-08-01 |
| 卷号 | 289期号:8页码:3175-3195 |
| 关键词 | Magnetic decreases Magnetic holes Interplanetary coronal mass ejection (ICME) Solar wind |
| ISSN号 | 0038-0938 |
| DOI | 10.1007/s11207-014-0521-y |
| 文献子类 | Article |
| 英文摘要 | Magnetic decreases (MDs) are structures observed in interplanetary space with significant decreases in magnetic-field magnitude. Events with little or no change in the field direction are called linear magnetic decreases (LMDs), the others are called nonlinear MDs (NMDs). In this article we focus on LMD and NMD trains, where LMD trains are defined as at least three LMDs in a row and NMD trains as trains (a parts per thousand yen three MDs in a row) that are not all linear. If the temporal separation between two MDs was shorter than five minutes, they were considered as one train event. A total of 16 273 MD trains (including 897 LMD trains and 15 376 NMD trains) were identified and studied. The details of the background magnetic-field and plasma (e.g. ion-density and velocity) features were examined and compared with the average solar-wind properties. LMD trains are found to occur in regions with relatively low magnetic-field strengths, high ion-number densities, and large plasma beta s (ratio of the plasma thermal pressure to the magnetic pressure). In sharp contrast, NMD trains have plasma properties similar to the average solar wind. Forty-three LMD trains are related to interplanetary coronal mass ejections (ICMEs) (including 19 events that occurred in ICME sheaths and 24 in the ICME proper), while 222 LMD trains occurred in corotating interaction regions (CIRs), and the remaining 632 events in the normal solar wind. The LMD trains that occurred in ICME sheaths are thought to be associated with the generation mechanism of the mirror-mode instability. Only 552 of the NMD trains are related to ICMEs (including 236 events in ICME sheaths and 316 in ICMEs proper), while 3889 (25 %) NMD trains occurred in CIRs, and the remaining 71 % occurred in the normal solar wind. Because the NMD trains have various plasma properties that differ from the LMD trains, we suggest that NMD trains may be generated by different mechanisms, for instance by a steepening of Alfv,n waves. |
| WOS关键词 | NONLINEAR ALFVEN WAVES ; PROTON TEMPERATURE ANISOTROPY ; MIRROR-MODE STRUCTURES ; CORONAL HOLES ; MAGNETOHYDRODYNAMIC TURBULENCE ; INTERPLANETARY SPACE ; LION ROARS ; EQUATOR-S ; MAGNETOSHEATH ; DISCONTINUITIES |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000336334900020 |
| 出版者 | SPRINGER |
| 资助机构 | NNSFC(41031065 ; NNSFC(41031065 ; Shandong Natural Science Foundation(JQ201112) ; Shandong Natural Science Foundation(JQ201112) ; Ministry of Education of China(NCET-12-0332) ; Ministry of Education of China(NCET-12-0332) ; Specialized Research Fund for State Key Laboratories in China ; Specialized Research Fund for State Key Laboratories in China ; Scholarship Award for Excellent Doctoral Student ; Scholarship Award for Excellent Doctoral Student ; Shandong University ; Shandong University ; Graduate Independent Innovation Foundation of Shandong University (GIIFSDU) ; Graduate Independent Innovation Foundation of Shandong University (GIIFSDU) ; 41074106 ; 41074106 ; 41322031) ; 41322031) ; NNSFC(41031065 ; NNSFC(41031065 ; Shandong Natural Science Foundation(JQ201112) ; Shandong Natural Science Foundation(JQ201112) ; Ministry of Education of China(NCET-12-0332) ; Ministry of Education of China(NCET-12-0332) ; Specialized Research Fund for State Key Laboratories in China ; Specialized Research Fund for State Key Laboratories in China ; Scholarship Award for Excellent Doctoral Student ; Scholarship Award for Excellent Doctoral Student ; Shandong University ; Shandong University ; Graduate Independent Innovation Foundation of Shandong University (GIIFSDU) ; Graduate Independent Innovation Foundation of Shandong University (GIIFSDU) ; 41074106 ; 41074106 ; 41322031) ; 41322031) ; NNSFC(41031065 ; NNSFC(41031065 ; Shandong Natural Science Foundation(JQ201112) ; Shandong Natural Science Foundation(JQ201112) ; Ministry of Education of China(NCET-12-0332) ; Ministry of Education of China(NCET-12-0332) ; Specialized Research Fund for State Key Laboratories in China ; Specialized Research Fund for State Key Laboratories in China ; Scholarship Award for Excellent Doctoral Student ; Scholarship Award for Excellent Doctoral Student ; Shandong University ; Shandong University ; Graduate Independent Innovation Foundation of Shandong University (GIIFSDU) ; Graduate Independent Innovation Foundation of Shandong University (GIIFSDU) ; 41074106 ; 41074106 ; 41322031) ; 41322031) ; NNSFC(41031065 ; NNSFC(41031065 ; Shandong Natural Science Foundation(JQ201112) ; Shandong Natural Science Foundation(JQ201112) ; Ministry of Education of China(NCET-12-0332) ; Ministry of Education of China(NCET-12-0332) ; Specialized Research Fund for State Key Laboratories in China ; Specialized Research Fund for State Key Laboratories in China ; Scholarship Award for Excellent Doctoral Student ; Scholarship Award for Excellent Doctoral Student ; Shandong University ; Shandong University ; Graduate Independent Innovation Foundation of Shandong University (GIIFSDU) ; Graduate Independent Innovation Foundation of Shandong University (GIIFSDU) ; 41074106 ; 41074106 ; 41322031) ; 41322031) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/86528]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Shi, Q. Q. |
| 作者单位 | 1.Shandong Univ, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Sch Space Sci & Phys, Weihai 264209, Peoples R China 2.Chinese Acad Sci, Sate Key Lab Space Weather, Beijing 100190, Peoples R China 3.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 4.Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA 5.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiao, T.,Shi, Q. Q.,Tian, A. M.,et al. Plasma and Magnetic-Field Characteristics of Magnetic Decreases in the Solar Wind at 1 AU: Cluster-C1 Observations[J]. SOLAR PHYSICS,2014,289(8):3175-3195. |
| APA | Xiao, T..,Shi, Q. Q..,Tian, A. M..,Sun, W. J..,Zhang, H..,...&Du, A. M..(2014).Plasma and Magnetic-Field Characteristics of Magnetic Decreases in the Solar Wind at 1 AU: Cluster-C1 Observations.SOLAR PHYSICS,289(8),3175-3195. |
| MLA | Xiao, T.,et al."Plasma and Magnetic-Field Characteristics of Magnetic Decreases in the Solar Wind at 1 AU: Cluster-C1 Observations".SOLAR PHYSICS 289.8(2014):3175-3195. |
入库方式： OAI收割
来源：地质与地球物理研究所
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