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中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： a.a.petrukovich Space Research Institute 84/32 Profsoyuznaya st.Moscow 117997Russia

The current sheet in Earth’s magnetotail often flaps,and the flapping waves could be induced propagating towards the dawn and dusk flanks,which could make the current sheet *** explore the dynamic characteristics of current sheet associated with the flapping motion holistically and provide reasonable physical interpretations,detailed direct calculation and analysis have been applied to one approximate analytic model of magnetic field in the flapping current *** main results from the model demonstrate:(1) the magnetic fluctuation amplitude is attenuated from the center of current sheet to the lobe regions;The larger wave amplitude would induce the larger magnetic amplitude;(2) the curvature of magnetic field lines(MFLs),with maximum at the center of current sheet,is only dependent on the displacement Z along the south-north direction from the center of current sheet,regardless of the tilt of current sheet;(3) the half-thickness of neutral sheet,h,the minimum curvature radius of MFLs,R,and the tilt angle of current sheet,δ,satisfies h=R cosδ;(4) the gradient of magnetic strength forms a double-peak profile,and the peak value would be more intense if the local current sheet is more tilted;(5) current density j and its j,j components reach the extremum at the center of CS.j and j would be more intense if the local current sheet is more tilted,but it is not the case for j;and(6) the field-aligned component of current density mainly appears in the neutral sheet,and the sign of it would change alternatively as the flapping waves passing *** check the validity of the model,one simulation on the virtual measurements has been made,and the results are in well consistence with actual observations of Cluster.

关键词： Magnetotail Magnetic geometrical structure Flapping current sheet Tilted current sheet Neutral sheet

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Statistical survey on the magnetic structure in magnetotail current sheets

Statistical survey on the magnetic structure in magnetotail ...

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中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： M.W.Dunlop a.a.petrukovich E.Lucek Rutherford Appleton Laboratory Didcot UK Space Research Institute Moscow Russia Blackett Laboratory Imperial College London LondonUK

[1]On the basis of the multipoint magnetic observations of Cluster in the region 15-19 R downtail,the magnetic field structure in magnetotail current sheet(CS) center is statistically *** is found that the B component(in GSM coordinates) is distributed mainly within |B|<5nT,while the B component is mostly positive and distributes mainly within 10 *** plane of the magnetic field lines(MFLs) is mostly vertical to the equatorial plane,with the radius of curvature(Rc) of the MFLs being directed earthward and the binormal(perpendicular to the curvature and magnetic field direction) being directed azimuthally *** curvature radius of MFLs reaches a minimum,R,at the CS center and is larger than the corresponding local half thickness of the neutral sheet,h. Statistically,it is found that the overall surface of the CS,with the normal pointing basically along the south-north direction,can be approximated to be a plane parallel to equatorial plane,although the local CS may be flapping and is frequently tilted to the equatorial *** tilted CS(normal inclined to the equatorial plane) is apt to be observed near both flanks and is mainly associated with the slippage of magnetic flux *** is statistically verified that the minimum curvature radius,R,half thickness of neutral sheet,h,and the slipping angle of MFLs,8,in the CS satisfies h = R cosδ.The current density,with a mean strength of 4-8 nA/m,basically flows azimuthally and tangentially to the surface of the CS,from dawn side to the dusk *** is an obvious dawn-dusk asymmetry of CS,*** magnetic local times(MLT) 1:00-～01:00, the CS is relatively thinner;the minimum curvature radius of MFLs,R(0.6-1 R) and the half-thickness of neutral sheet,h(0.2-0.4 R),are relatively smaller,and B(3-5 nT) and the minimum magnetic field,B(5-7 nT),are *** is also found that negative B has a higher probability of occurrence and the cross-tail current density j is dominant (2-4 nA/m) in comparison to

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Radial distribution of magnetic field in earth magnetotail current sheet

Radial distribution of magnetic field in earth magnetotail c...

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中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： Z.J.Rong W.X.Wan C.Shen a.a.petrukovich W.Baumjohann M.W.Dunlop Y.C.Zhang Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of Sciences Beijing National Observatory of Space Environment Institute of Geology and GeophysicsChinese Academy of Sciences State Key Laboratory of Space Weather Center for Space Science and Applied ResearchChinese Academy of Sciences

Knowing the magnetic field distribution in the magnetotail current sheet(CS) is essential for exploring magnetotail *** this study,using a joint dataset of Cluster/TC-1,the radial profile of the magnetic field in the magnetotail CS with radial distances covering 8 100 nT for active times)and solar wind parameters are statistically *** new findings demonstrate that,independent of the activity state,the field strength and B component(GSM coordinates) start the monotonic increase prominently as r decreases down to 1.5R,which means the dipole field starts to make a significant contribution from *** least in the surveyed radial range,the B component is found to be weaker in the midnight and dusk sectors than that in the dawn sector,displaying a dawn-dusk *** occurrence rate of negative B in active times also exhibits a similar asymmetric distribution,which implies active dynamics may occur more frequently at midnight and dusk *** comparison with that in quiet intervals,several features can be seen in active times:(1) a local B minimum between10.5 5 nPa),which may support the dawn-dusk squeezing effect as presented by Miyashita et al.(2010).The CS B is generally correlated with the interplanetary magnetic field(IMF) B component,and the correlation quality is found to be better with higher penetration coefficient(the ratio of CS B to IMF B) when IMF B is *** implications of the present results are discussed.

关键词： Magnetotail Magnetic structure Current sheet

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Time delay of interplanetary magnetic field penetration into Earth's magnetotail

Time delay of interplanetary magnetic field penetration into...

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中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： Z.J.Rong A.T.Y.Lui W.X.Wan Y.Y.Yang C.Shen a.a.petrukovich Y.C.Zhang T.L.Zhang Y.Wei Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of Sciences Beijing National Observatory of Space Environment Institute of Geology and GeophysicsChinese Academy of Sciences Swedish Institute of Space Physics Applied Physics Laboratory Johns Hopkins University State Key Laboratory of Space Weather Center for Space Science and Applied ResearchChinese Academy of Sciences Space Research Institute Russian Academy of Sciences Space Research Institute Austrian Academy of Sciences

Many previous studies have demonstrated that the interplanetary magnetic field(IMF) can control the magnetospheric *** magnetospheric responses to the external IMF have been assumed for a long *** specific processes by which IMF penetrates into magnetosphere,however,are actually *** this issue will help to accurately interpret the time sequence of magnetospheric activities(e.g.,substorm and tail plasmoids) exerted by *** two carefully selected cases,we found that the penetration of IMF into magnetotail is actually delayed by 1–1.5 h,which significantly lags behind the magnetotail response to the solar wind dynamic *** delayed time appears to vary with different auroral convection intensity,which may suggest that IMF penetration in the magnetotail is controlled considerably by the dayside *** unfavorable cases demonstrate that the penetration lag time is more clearly identified when storm/substorm activities are not involved.

关键词： The penetration of IMF into magnetotail is delayed by 1–1.5 h The delay time strongly depends on the polar convection intensity The penetration efficiency is higher than that reported previously

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Profile of strong magnetic field By component in magnetotail current sheets

Profile of strong magnetic field By component in magnetotail...

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中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： Z.J.Rong W.X.Wan C.Shen X.Li M.W.Dunlop a.a.petrukovich L.-N.Hau T.L.Zhang H.Reme A.M.Du E.Lucek Beijing National Observatory of Space Environment Institute of Geology and GeophysicsChinese Academy of Sciences State Key Laboratory of Space Weather Center for Space Science and Applied ResearchChinese Academy of Sciences Laboratory for Atmosphere and Space Physics Department of Aerospace and Engineering SciencesUniversity of Colorado at BoulderBoulderColoradoUSA. Rutherford Appleton Laboratory OxfordUK. Space Research Institute MoscowRussia. Institute of Space Science National Central UniversityJhongliTaiwan. Department of Geophysics and Planetary Sciences University of Science and Technology of ChinaHefeiChina Space Research Institute Austrian Academy of SciencesGrazAustria. IRAP University of ToulouseToulouseFrance.CNRSIRAPToulouseFrance. Blackett Laboratory Imperial College LondonLondonUK.

[1]The strong magnetic field B component(in GSM coordinates) has been increasingly noticed to play an important role in the dynamics of tail current sheet (CS).The distribution profile of strong B components in the ta...

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合作视角下的深空科学:月球与金星

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中国航天:英文版 2023年第1期24卷 15-19页

作者： Anatoli petrukovich Acad.Lev Zelenyi Igor Mitrofanov Oleg Korablev Vladislav Tretyakov Dmitry Zarubin Dmitry Gorinov SpaceResearch Institute MoscowRussia Space Council of Russian Academy of Sciences MoscowRussia

The paper gives a brief review of the upcoming Russian moon and Venus robotic exploration missions,including objectives and cooperation *** also introduces the joint Russia-China International Lunar Research Station(I... 详细信息

关键词： moon Venus space exploration cooperation regolith

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Wavy variation of quiet nightside plasma sheet

Wavy variation of quiet nightside plasma sheet

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第十一届全国日地空间物理学术讨论会

作者： A.petrukovich W.Baumjohann R.Nakamura A.Runov A.Baloh. Space Research Institute Moscow Russia Space Research Institute Moscow Russia Space Research Institute Moscow Russia Space Research Institute Moscow Russia Space Research Institute Moscow Russia

＜正＞Cluster observations revealed an abundance of inclined current sheets Magnetic configuration of long period （up to 15 min） wavy motions with significant sheet inclination changes appear to be created by an azi...

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