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| 1 | THEMIS observation of a magnetotail current sheet flapping wave显示文摘A flapping wave was observed by THEMIS-B(P1)and THEMIS-C(P2)probes on the dawn side of the magnetotail,while the solar wind was generally stable.The magnetic activity was quite weak,suggesting that this flapping wave was generated by an internal instability,which normally occurs during magnetic quiet times.Our analysis shows that the flapping wave was propagating downward with a tail-aligned scale of at least 3.7 R E and did not show much change in shape during its propagation from P1 to P2.Correlation analysis employed to estimate the time lag between the corresponding half waveforms of P1 and P2 shows that the propagating velocities along the current sheet normal directions were close to each other in the beginning,but increased linearly later on.The average wavelength of the flapping wave is approximately 4 R E.Theoretical analysis suggests that the ballooning type wave model may not be the mechanism for the observed flapping wave,but that the magnetic double-gradient instability model is a more plausible candidate. | Weijie Sun Suiyan Fu Quanqi Shi Qiugang Zong Zhonghua Yao Ting Xiao George Parks | 2014 | Chinese Science Bulletin2014，59，2： | 3 |
| 2 | Braking of high-speed flows in the magnetotail:THEMIS joint observations显示文摘The motion and deceleration processes of plasma sheet high-speed flows have great significance to magnetospheric particle acceleration,magnetic field perturbation,magnetic flux transport,triggering of substorm,and the current system formation in the magnetotail.From February to April 2009,two satellites of the Time History of Events and Macroscale Interactions during Substorms mission,THA and THE,were often separated largely in Z direction,but had small X and Y separations.Such special configuration allows simultaneous observations of highspeed flows at the center and boundary of the plasma sheet.Based on selected case study and statistical analysis,it is found that for about 89%of the events we selected,the probe further away from the neutral sheet observed the high-speed flow earlier than the one close to the center,and the flow is mainly field aligned.And for about 95%events the probe further away from the neutral sheet observed higher X component of the plasma flow.With the hypothesis that parallel flow keeps the same speed during its earthward propagation while central plasma sheet stream uniformly or suddenly brakes on its way to the earth,we deduced the position where the deceleration begins to be between 13 Re and 17 Re downtail,where thenear-earth reconnection is supposed to occur.In addition,our statistical results show that dipolarization fronts observed in the central plasma sheet are more prominent than those observed in the plasma sheet boundary layer ahead of the high-speed flow. | Wensai Shang Zhonghua Yao Quanqi Shi Weijie Sun Suiyan Fu Jiang Liu Anmin Tian Qiugang Zong Zuyin Pu Ting Xiao Vassilis Angelopoulos | 2014 | Chinese Science Bulletin2014，59，3： | 3 |
| 3 | TC-1在近磁尾观测到地向流的偏转显示文摘使用TC-1卫星在2004年到2007年磁尾探测数据,将以往高速流的研究拓宽到较低的速度,统计分析其从-13.4RE到-5RE地心距离内的空间演化.研究发现:(1)在向着地球运动的过程中,地向流发生率在日地连线附近减小,但在晨昏两翼的发生率增加,且在黄昏侧的发生率最高;这表明地向流在运动到近地时向着晨昏两翼偏转.(2)越靠近地球,流速V和Vx越小,Vy和Vz的变化幅度较小并且具有明显的晨昏不对称性;所以地向流在近地运动过程中,不仅在晨昏方向上偏转,而且在南北方向上偏转.(3)地向流期间,等离子体密度整体偏小;但是随地心距离的减小,密度整体上逐步增加.(4)平行和垂直于磁场的流速具有明显的晨昏不对称性.在黎明侧的平行流速比黄昏侧大,在黄昏侧的垂直流速比黎明侧大.鉴于较大的垂直流速易触发与电流中断关系密切的不稳定性,我们推测电流中断更容易出现在黄昏侧.(5)除个别位置处的热压和磁压相当外,磁压在总压中一直占据主导地位.日地连线附近的总压较大,晨昏两翼处的总压相对较小;从而在晨昏向上产生较大的压力梯度,导致地向流在晨昏两翼偏转和发生率增大.在晨昏两翼,距离地球较近的位置处观测到了较小的压力;而在日地连线附近,距离地球较远的位置才可以观测到较小的压力;压力分布的这个统计特征说明过去事例研究中电流中断出现在不同的位置可能是由近地磁尾的压力分布造成的. | 马玉端 杨建 庞学霞 | 2016 | 地球物理学报2016，59，4： | 3 |
| 4 | Review of Mercury's dynamic magnetosphere:Post-MESSENGER era and comparative magnetospheres显示文摘This review paper summarizes the research of Mercury’s magnetosphere in the Post-MESSENGER era and compares its dynamics to those in other planetary magnetospheres,especially to those in Earth’s magnetosphere.This review starts by introducing the planet Mercury,including its interplanetary environment,magnetosphere,exosphere,and conducting core.The frequent and intense magnetic reconnection on the dayside magnetopause,which is represented by the flux transfer event'shower',is reviewed on how they depend on magnetosheath plasma β and magnetic shear angle across the magnetopause,followed by how it contributes to the flux circulation and magnetosphere-surface-exosphere coupling.In the next,Mercury’s magnetosphere under extreme solar events,including the core induction and the reconnection erosion on the dayside magnetosphere,as well as the responses of the nightside magnetosphere,are reviewed.Then,the dawn-dusk properties of the plasma sheet,including the features of the ions,the structure of the current sheet,and the dynamics of magnetic reconnection,are summarized.The last topic is devoted to the particle energization in Mercury’s magnetosphere,which includes the energization of the Kelvin-Helmholtz waves on the magnetopause boundaries,reconnection-generated magnetic structures,and the cross-tail electric field.In each chapter,the last section discusses the open questions related to each topic,which can be considered by the simulations and the future spacecraft mission.We end this paper by summarizing the future Bepi Colombo opportunities,which is a joint mission of ESA and JAXA and is en route to Mercury. | Weijie SUN Ryan MDEWEY Sae AIZAWA Jia HUANG James A.SLAVIN Suiyan FU Yong WEI Charles F.BOWERS | 2022 | Science China Earth Sciences2022，65，1： | 2 |
| 5 | THEMIS statistical study on the plasma properties of high-speed flows in Earth's magnetotail显示文摘Using Time History of Events and Macroscale Interactions during Substorms(THEMIS) observations from 2007 to 2011 tail seasons, we study the plasma properties of high speed flows(HSFs) and background plasma sheet events(BPSs) in Earth's magnetotail(|Y_(GSM)|<13R_E, |Z_(GSM)|<5R_E, –30R_E | PAN Dong Xiao SUN Wei Jie SHI Quan Qi TIAN An Min YAO Zhong Hua FU Sui Yan ZONG Qiu Gang ZHOU Xu Zhi PU Zu Yin | 2016 | Science China Earth Sciences2016，59，3： | 2 |
| 6 | 地球磁尾不同位置处高速流的统计特性研究显示文摘使用2007~2011年THEMIS卫星数据,对位于地球磁尾(|YGSM|〈13RE,|ZGSM|〈5RE。 | 潘东晓 孙为杰 史全岐 田安民 YAO ZhongHua 傅绥燕 宗秋刚 周煦之 濮祖荫 | 2015 | 中国科学:地球科学2015，45，12： | 1 |
| 7 | Downward current electron beams observed at the dipolarization front显示文摘The strong field-aligned pitch angle distribution of electrons is observed right at the dipolarization front (DF) before the arriving of a high speed flow when the four Cluster satellites are traveling in the magnetotail around 15 R E on July 22, 2001. The increased electron fluxes only last for a short time period at the DF, corresponding to just a few bouncing periods for 1 keV electrons. The field-aligned current contributed by these electrons agrees well with that calculated by the magnetic field observations by four satellites at the front. These electron streams are found in the energy range of 0.2-2 keV, peak around 1 keV. It is suggested that these downward current electrons may be originated near the aurora region by some kinds of potential structure. The occurrence of these electrons implies that the formation of the dipolarization front and the associated field-aligned current play an important role in the magnetosphere-ionosphere coupling. | ZHENG Hao FU SuiYan ZONG QuiGang PU ZuYin | 2013 | Chinese Science Bulletin2013，58，8： | 1 |
| 8 | 2000~2013年地球电离层电场穿透研究简评(英文)显示文摘电场穿透现象是太阳风与行星电离层-磁层系统相互作用所产生的一种全球尺度电离层扰动现象.无论是对于有内禀磁层的地球,还是无内禀磁层的金星和火星,太阳风电场都能耦合进入其电离层.在21世纪的前14年,人们在电场穿透的机理、效应、观测特征等多方面取得较多成果.本文主要梳理3个方面的进展:(1)穿透电场的驱动过程及观测特征;(2)穿透电场对中低纬电离层等离子分布的影响;(3)穿透电场对赤道扩展F层的形成与演化的影响.总体来看,对于电场穿透理解的深化有赖于将来观测网络的扩大与观测手段的强化. | 魏勇 赵必强 李国主 万卫星 | 2015 | Science Bulletin2015，60，8： | 0 |
| 9 | Recent Progresses of Magnetospheric Physics in China:2010—2011显示文摘In the past two years,many progresses are made in magnetospheric physics by using either the data of Double Star Program,Cluster and THEMIS missions,or by computer simulations. This paper briefly reviews these works based on papers selected from the 80 publications from April 2010 to April 2011.The subjects covered various sub-branches of magnetospheric physics,including geomagnetic storm,magnetospheric substorm,etc. | CAO Jinbin LIU Zhenxing PU Zuyin | 2012 | 空间科学学报2012，32，5： | 0 |
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