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National Science Review 2020年第10期7卷 1606-1615页

作者： Fei He Yong Wei Weixing Wan Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences

The most fantastic optical phenomena in the Earth’s upper atmosphere are the auroras. They are highly informative indicators of solar activity, geomagnetic activity, upper atmospheric structures and dynamics,and magnetospheric energetic particles. An area where the geomagnetic field differs significantly from the expected symmetric dipole, such as at the South Atlantic Anomaly, where the magnetic field intensity is low,gives rise to stronger precipitation of energetic particles into the upper atmosphere. Impact excitation and the subsequent airglow emissions exhibit aurora-like dynamic signatures. Nomenclatures of nonpolar aurora or equatorial auroras are similar to those used with the polar auroras owing to their similar excitation mechanisms. This paper provides an overview of the knowledge and the challenges concerning auroral activity at the South Atlantic Anomaly, or more generally, at the negative magnetic anomaly. We emphasize systematic investigation of the equatorial auroras to reveal the temporal and spatial evolution of the magnetic anomaly and the behaviour of energetic particles in near-Earth space.

关键词： aurora geomagnetic field South Atlantic Anomaly negative magnetic anomaly energetic particles

Throat aurora observed by DMSP/SSUSI in a global view

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Science China Earth Sciences 2020年第6期63卷 891-898页

作者： Su ZHOU Desheng HAN Sneha AGOKANI Ravindran SELVAKUMARAN Yongliang ZHANG State Key Laboratory of Marine Geology School of Ocean and Earth ScienceTongji UniversityShanghai 200092China State Key Laboratory of Space Weather Chinese Academy of SciencesBeijing 100190China School of Electronic and Communication Engineering Guiyang UniversityGuiyang 550005China The Johns Hopkins University Applied Physics Laboratory LaurelMD 20723USA

Throat aurora was defined based on the ground observations near local noon and has been suggested to be the ground signature of an indentation on the subsolar magnetopause.A global view of the auroral oval with throat aurora will be critical for inferring global processes at the magnetopause,but it has never been *** imaging spectrograph observations from Defense Meteorological Satellite Program satellites,for the first time,here we show typical throat auroras in a global view and reveal some important observational facts as follows.(1)The throat auroras can be as long as^8 degrees in latitudinal direction,which is hardly to be fully seen in the ground-based camera.(2)The plasma flows and field aligned currents associated with throat aurora show consistences with previous radar observations,which have been suggested to be the observational evidence of magnetopause reconnection.(3)Most importantly,we confirmed that the electron and ion precipitations associated with throat aurora are always spatially separated,i.e.,electrons in the east and ions in the *** observational results not only establish a new picture of the aurora oval near local noon,but also provide important support to a conceptual model of throat aurora.

关键词： aurora Throat aurora Cusp Magnetopause indentation

Ionospheric polarization electric field guiding magnetopause reconnection: A conceptual model of throat aurora

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Science China Earth Sciences 2019年第12期62卷 2099-2105页

作者： Desheng HAN State Key Laboratory of Marine Geology School of Ocean and Earth Science Tongji University

Frequently observed throat auroras have been suggested to be correspondent to indentations on the subsolar magnetopause,but how these indentations can be generated is unknown *** on analyzing the detailed observational features of throat aurora,a conceptual model for generation of throat aurora is *** model suggests that precipitation of a north-south aligned stripy diffuse aurora can lead to an ionospheric conductivity enhancement and thus produce a polarization electric field in dusk-to-dawn direction in the *** mapping to the magnetosphere along closed field lines,this electric field can guide a magnetopause reconnection to develop inward the magnetosphere and result in a throat *** this model can comprehensively explain all the observational results that have been presented up to now,we argue that the assumption of ionospheric polarization electric field affecting magnetopause reconnection should be true and be worthy of further investigations.

关键词： Throat aurora Ionospheric polarization electric field Magnetopause reconnection Magnetosphere-ionosphere coupling Cusp ionosphere

Interplanetary shock-associated aurora

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Advances in Polar Science 2019年第1期30卷 11-23页

作者： LIU Jianjun HU Hongqiao HAN Desheng YANG Huigen SOA Key Laboratory for Polar Science Polar Research Institute of China State Key Laboratory of Marine Geology School of Ocean and Earth Science Tongji University

Interplanetary shocks or solar wind pressure pulses have prompted impacts on Earth's magnetospheric and ionospheric environment, especially in causing dynamic changes to the bright aurora in the polar ionosphere. The auroral phenomenon associated with shock impingements, referred to as shock aurora, exhibits distinct signatures differing from other geophysical features on the dayside polar ionosphere. Shock aurora provides a direct manifestation of the solar wind–magnetosphere–ionosphere interaction. Imagers onboard satellites can obtain the associated large-scale auroral characteristics during shock impingement on the magnetopause. Therefore, auroral data from satellites are very useful for surveying the comprehensive features of shock aurora and their general evolution. Nonetheless, the ground-based high temporal-spatial resolution all-sky imagers installed at scientific stations play an essential role in revealing medium-and small-scale characteristics of shock aurora. Here, we focus on shock aurora imaging signatures measured by imagers onboard satellites and ground-based all-sky imagers.

关键词： interplanetary shock sudden impulse shock aurora wave-particle interaction field-aligned current

Ground Observations of Post-Noon aurora: a Case Study

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Wuhan University Journal of Natural Sciences 2000年第4期5卷 441-446页

作者： Ai Yong, Wang Jing-fang, Liu Rui-yuan, Yang Hui-gen, Hu Hong-qiao, Sato Natsuo, Masayuki Kikuchi College of Electronic Information, Wuhan University, Wuhan 430072, China Polar Research Institute of China, Shanghai 200129, China National Institute of Polar Wuhan University College of Electronic Information Wuhan China (GRID:grid.49470.3e) (ISNI:***) Polar Research Institute of China Shanghai China (GRID:grid.418683.0) (ISNI:***) National Institute of Polar Research Tokyo Japan (GRID:grid.410816.a) (ISNI:***)

The characteristics of the post-noon aurora observed at Antarctic Zhongshan station on June 12, 1999, were discussed and analyzed. In the condition of the magnetic activity is not large (K p≈1), for post-noon 630.0 nm emissions, the total fluxes of soft precipitating particles were increasing from 10∶50 UT to 13∶35 UT and were decreasing from 13∶35 UT to 18∶00 UT in almost monotonous way. Away from noon, the 557.7 nm emissions increased gradually from 10∶50 UT to 17∶10 UT. The behaviors of the precipitating particles for exciting 630.0 nm aurora and 557.7 nm aurora were quite different. The peak intensity of 630.0 nm and 557.7 nm emissions appeared at about 13∶35 UT and 15∶40 UT respectively, the time difference of two peaks is about 2 h. The energy of precipitating electrons remained fairly steady until 15∶00 UT when it rose dramatically.

关键词： aurora dayside observation

Analysis of Characteristic of aurora Substorm Observed at Antarctic Zhongshan Station

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Wuhan University Journal of Natural Sciences 2000年第3期5卷 312-316页

作者： Ai Yong1, Wang Jing-fang1, Liu Rut-yuan2, Yang Hut-gen 2, Sato Natsuo3 1. College of Electronic information, Wuhan University, Wuhan 4 30072, China 2. Polar Research institute of China, Shanghai 200129, China 3. National Institute of Polar Research, Tokyo, Japan 173 College of Electronic Information Wuhan University Wuhan China Polar Research Institute of China Shanghai China National Institute of Polar Research Tokyo Japan

The characteristics of a strong aurora substorm observed at Antarctic Zhongshan station (magnetic latitude=74.5°) on 8 April, 1999, were discussed and analyzed. The developing steps of the aurora substorm that happened in dusk time were almost the same with that of midnight aurora substorm. The averaged moving speed of the aurora arc toward pole area during the substorm expansion phase was about 3.0 km/s, westward-traveling surge speed was about 2.0 km/s. The extension from south to north in the substorm can cover 1100 km in distance.

关键词： aurora substorm observation

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aurora A在人前列腺癌中的表达

四川大学学报（医学版） 2008年第1期39卷 1-5页

作者：屈艺张林母得志黄翔魏大鹏赵凤艳刘柏林四川大学华西第二医院实验中心成都610041 四川省人民医院泌尿外科四川大学华西基础医学与法医学院生物化学与分子生物学研究室

目的观察aurora A在人前列腺癌中的表达情况,探讨aurora A是否在前列腺癌发生发展中起一定作用。方法采用RT-PCR、免疫组织化学和Western blot,检测在前列腺癌组织及其细胞系中aurora A mRNA和蛋白表达。同时,在前列腺癌细胞系PC3中导... 详细信息

目的观察aurora A在人前列腺癌中的表达情况,探讨aurora A是否在前列腺癌发生发展中起一定作用。方法采用RT-PCR、免疫组织化学和Western blot,检测在前列腺癌组织及其细胞系中aurora A mRNA和蛋白表达。同时,在前列腺癌细胞系PC3中导入靶向aurora A mRNA的DNA核酶,观察抑制aurora A对前列腺癌细胞生长的影响。结果91%的前列腺癌组织和三种前列腺癌细胞系(PC3、LNCaP和Du145)中aurora A表达阳性,而且,靶向aurora A mRNA的DNA核酶导入PC3细胞后抑制了aurora A表达,使PC3细胞停滞在G2/M期,并促进细胞凋亡。结论aurora A可能在前列腺癌形成中起一定作用,aurora A可望成为前列腺癌治疗中有价值的靶点。

关键词： aurora A基因表达前列腺癌 DNA核酶

aurora A表达与人前列腺癌细胞对紫杉醇敏感性的相关性研究

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四川大学学报（医学版） 2007年第2期38卷 306-308页

作者：武文屈艺刘小康张林母得志黄翔杨春蕾四川大学华西基础医学与法医学院药理学教研室成都610041 四川大学华西第二医院实验中心四川省人民医院泌尿外科四川大学生命科学院细胞学研究室

目的探讨前列腺癌细胞中aurora A表达与细胞对紫杉醇敏感性的相关性,明确aurora A表达是否影响紫杉醇对前列腺癌的治疗效果。方法以激素非依赖性前列腺癌细胞Du145为研究对象,通过转染aurora A全长基因得到稳定高表达aurora A的细胞系Du... 详细信息

目的探讨前列腺癌细胞中aurora A表达与细胞对紫杉醇敏感性的相关性,明确aurora A表达是否影响紫杉醇对前列腺癌的治疗效果。方法以激素非依赖性前列腺癌细胞Du145为研究对象,通过转染aurora A全长基因得到稳定高表达aurora A的细胞系Du145-aurora A,细胞用不同浓度紫杉醇处理,用MTT细胞增殖实验检测细胞生长抑制率,用流式细胞仪分析细胞凋亡情况,比较aurora A表达上调后细胞生长抑制率和细胞凋亡率的变化。同时,用核酶技术使细胞aurora A表达下调,检测aurora A表达下调后细胞生长抑制率和细胞凋亡率的变化。结果aurora A表达上调使紫杉醇对细胞的生长抑制率和细胞凋亡率均降低(Paurora A表达下调使紫杉醇对细胞的生长抑制率和细胞凋亡率均增高(Paurora A表达与细胞对紫杉醇敏感性具有相关性,抑制aurora A可望提高紫杉醇对前列腺癌的治疗效果。

关键词： aurora A 前列腺癌 Du145 紫杉醇

aurora A表达对人前列腺癌细胞生物学行为的影响

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四川大学学报（医学版） 2007年第2期38卷 302-305页

作者：赵凤艳屈艺张林母得志黄翔魏大鹏四川大学华西基础医学与法医学院分子生物研究室成都610041 四川大学华西第二医院实验中心四川省人民医院泌尿外科

目的研究aurora A表达增高对人前列腺癌细胞LNCaP生物学行为的影响,以了解其在人前列腺癌发生发展中的作用。方法克隆aurora A全长基因,将其转染入LNCaP细胞中表达,采用四唑盐(MTT)法细胞增殖实验检测aurora A表达升高的阳性细胞生长情... 详细信息

目的研究aurora A表达增高对人前列腺癌细胞LNCaP生物学行为的影响,以了解其在人前列腺癌发生发展中的作用。方法克隆aurora A全长基因,将其转染入LNCaP细胞中表达,采用四唑盐(MTT)法细胞增殖实验检测aurora A表达升高的阳性细胞生长情况,采用改良的Transwell侵袭小室方法检测细胞侵袭能力;同时与转染空质粒(pcDNA3.1)细胞和未转染细胞进行比较。结果成功构建重组质粒pcDNA3.1-Full Length aurora A。aurora A高表达的LNCaP细胞增殖速度较空质粒转染细胞和未转染细胞快,培养3d后LNCaP-aurora A组细胞较pcDNA3.1质粒转染细胞及未转染的LNCaP细胞增多,差异有统计学意义(Paurora A组细胞也较另两组细胞表现出更强的穿膜能力(Paurora A表达增高与人前列腺癌细胞的恶性表型具有密切相关性,aurora A在人前列腺癌发生发展中可能发挥重要作用。

关键词： aurora A 人前列腺癌增殖侵袭