美国加利福尼亚大学洛杉矶分校（UCLA）乐超博士 学术报告
Empirical modeling the 3D force-balanced magnetic field structure during substorm growth phase
时间：2014-11-20星期四下午16:20
Time：November 20, 2014，Thursday, 16:20 p.m
地点：南楼208
乐超
Department of Atmospheric and Oceanic Sciences
University of California, Los Angeles,
主要研究方向为不同地磁活动的磁层磁场结构建模，太阳风-磁层相互作用，磁层及磁层电流体系对行星际激波的响应
2004.9-2008.6武汉大学本科
2008.9-2011.6北京大学硕士
2011.9-至今 加州大学洛杉矶分校博士在读
共发表SCI收录论文19篇，其中第一作者SCI论文9篇，获得2013年地球空间环境研讨会(GEM)最佳海报奖。
Empirical modeling the 3D force-balanced magnetic field structure during substorm growth phase
Abstract:
The plasma and magnetic field structure during the substorm growth phase is crucial to understanding development and initiation of substorms. In this study, we first established 2D plasma sheet pressure (P) distributions by using advanced machine learning technique--Support Vector Regression Machine (SVRM) with a systematic approach that balances model smoothness with fitting accuracy. 100,000 P data point from Geotail and THEMIS during substorm growth phase was used to obtain the pressure model that reveals the manner in which the plasma sheet pressure depends upon various control parameters (e.g., energy loading from solar wind and the effects from previous substorm) without any assumptions concerning the analytical form of P. The model predicts the P on the equatorial plane of any input control parameters and the predicted P matches well with THEMIS observations as well. We then computed the 3-D magnetic field in force balance with the predicted P under different energy state of substorm growth phase. As energy loading increases: P and pressure gradient increases; Bz decreases in the near Earth region and increases in the tail; The J⊥ becomes larger and peak moves towards the Earth; The field line becomes mores stretched and maps to lower latitude. In addition, J⊥ peaks off equator at near Earth, but peaks at equator in the tail and no Bz minimum though positive dBz/dz has been shown. Furthermore, there is typical R-1 FACs in the tail and R-2 FACs in the inner magnetosphere at late growth phase.
个人简介英文版
Education
Ph.D. candidate, University of California, Los Angeles, LA, CA,USA Sep. 2011 –June. 2016(expected)Department of Atmospheric and OceanicSciences
Advisor: Prof. LarryLyons
Major GPA:3.9
M.S., Peking University, Beijing,China Sep. 2008 –June.2011Institute of Space Physics and AppliedTechnology
Major GPA:3.83/4Major Rank:1/13
Graduate thesis title: Response of Geomagnetic activity, the magnetic field and plasmas atthe
geosynchronous orbit to interplanetary shock. Directed by Prof. QiugangZong.
B.E., Wuhan University, Wuhan,China Sep. 2004 – June2008School of ElectronicInformation
Major GPA:3.74Major Rank:1/122
Graduate thesis title:Multi-satellite observations of oxygen ion trace during superstormtime.Directed by Prof. Suying MA.Excellent Graduate ThesisAward
Areas of Research Interests
· Modeling of magnetic field configurations under different geomagneticactivity.
· Energetic practical motions in Magnetosphere and aurora activity inionosphere
· Solar wind-magnetospherecoupling
· The response of magnetic and electronic field in magnetosphere to Interplanetaryshock
Publications
· Yue,Chao,C.-P.Wang,L.Lyons,M.Henderson,Anampirical3Dforce-balancedmagneticfieldmodelingforsubstormgrowth phase, preparing toJ. Geophys. Res. SpacePhysics.
· Yue, Chao, C.-P. Wang, L. Lyons, Y. Wang, T. Hsu, M. Henderson, A.T.Y. Lui, Tsugunobu Nagai, A 2DempiricalplasmasheetpressuremodelforsubstormgrowthphaseusingtheSupportVectorRegressionMachine,submittedtoJ.Geophys. Res. Space Physics,underreview.
· Yue, Chao, C.-P. Wang, L. Lyons, J. Liang, E. F. Donovan, S. G. Zaharia, and M. Henderson (2014), Currentsheetscatteringandionisotropicboundaryunder3-Dempiricalforce-balancedmagneticfield,J.Geophys.Res.SpacePhysics,119,doi:10.1002/2014JA020172. Best Poster Award in 2013 GEMworkshop.
· Yue,Chao,C.-P.Wang,S.G.Zaharia,X.Xing,andL.Lyons(2013),Empiricalmodelingofplasmasheetpressureandthree-dimensionalforce-balancedmagnetosphericmagneticfieldstructure:2.Modeling,J.Geophys.Res.SpacePhysics,118, doi:10.1002/2013JA018943.
· YueChao,Y.Nishimura,L.R.Lyons,V.Angelopoulos,E.F.Donovan,Q.Shi,Z.Yao,andJ.W.Bonnell(2013),CoordinatedTHEMISspacecraftandall-skyimagerobservationsofinterplanetaryshockeffectsonplasmasheetflowbursts,polewardboundaryintensifications,andstreamers,J.Geophys.Res.SpacePhysics,118,doi:10.1002/jgra.50372.
· YueChao,andQ.Zong(2011),Solarwindparametersandgeomagneticindicesforfourdifferentinterplanetaryshock/ICME structures,J. Geophys. Res. Space Physics, 116, A12201,doi:10.1029/2011JA017013.
· YueChao,Q.Zong,Y.Wang,I.I.Vogiatzis,Z.Pu,S.Fu,andQ.Shi(2011),Innermagnetosphereplasmacharacteristicsinresponsetointerplanetaryshockimpacts,J.Geophys.Res.SpacePhysics,116,A11206,doi:10.1029/2011JA016736.
· YueChao,Q.-G.Zong,H.Zhang,Y.F.Wang,C.J.Yuan,Z.Y.Pu,S.Y.Fu,A.T.Y.Lui,B.YangandC.R.Wang(2010), Geomagnetic activities triggered by interplanetary shocksJ. Geophys. Res. Space Physics,115,A00I05,doi:10.1029/2010JA015356.
· YueChao,Q.-G.Zong,andY.F.Wang(2009),Responseofthemagneticfieldandplasmasatthegeosynchronousorbitto interplanetary shock,Chinese Sci Bull, 54, doi: 10.1007/s11434-009-0649-6, 2009.Best PaperAward.
· Wang, C.-P.,Chao Yue,S. Zaharia, X. Xing, L. Lyons, V. Angelopoulos, T. Nagai, and T. Lui (2013),Empiricalmodelingofplasmasheetpressureandthree-dimensionalforce-balancedmagnetosphericmagneticfieldstructure:1.Observation,J. Geophys. Res. Space Physics, 118,doi:10.1002/jgra.50585.
· Su.Z.P.,Q.-G.Zong,C.Yue,Y.F.Wang,H.Zhang,X.-Y.Zhou,P.Song,A.Pedersen,H.N.Zheng(2011),Protonauroral intensification induced by interplanetary shock on 7 November 2004.J. Geophys. Res. Space Physics,116,A08223, doi:10.1029/2010JA016239.
· Liang,J.,Donovan,E.,Ni,B.,Yue,C.,Jiang,F.,&Angelopoulos,V.(2014).Onanenergy‐latitudedispersionpattern
ofionprecipitationpotentiallyassociatedwithmagnetosphericEMICwaves.JournalofGeophysicalResearch:SpacePhysics, 119, doi:10.1002/2014JA020226.
· Yao,Z.H.,Pu,Z.Y.,Owen,C.J.,Fu,S.Y.,Chu,X.N.,Liu,J.,V.Angelopoulos,I.J.Rae,C.Yue,X.-Z.Zhou,Q.-G.Zong,X.Cao1,Q.Q.Shi,C.ForsythandA.M.Du(2014).CurrentReductioninaPseudo‐breakupEvent:THEMISObservations.Journal of Geophysical Research: Space Physics, 119, doi:10.1002/2014JA020186
· Yao,Z.H.,VAngelopoulos,ZYPu,SYFu,MKubyshkina,JLiu,XNChu,TNishimura,XCao,ADu,CYue,QQShi,YWei(2013),Conjugateobservationsofflowdiversioninthemagnetotailandauroralarcextensionintheionosphere,J.Geophys. Res. Space Physics, 118,4811–4816.
· Yang.B.,Q.-G.Zong,S.Y.Fu,X.L.Li,A.Korth,H.S.Fu,C.Yue,H.Reme(2011),TheroleofULFwavesinteractingwith oxygen ions at the outer ring current during storm timesJ. Geophys. Res. Space Physics,116,A01203,doi:10.1029/2010JA015683.
· Yang, B., Q.-G. Zong, S.Y. Fu, K. Takahashi, X. Li, Y. F. Wang, Z.Y. Pu, H. S. Fu, H. Reme,C. Yue, H. Zheng,C.Sheng(2011),PitchangleevolutionsofoxygenionsdrivenbystormtimeULFpoloidalstandingwaves.J.Geophys.Res.Space Physics, 116, A03207,doi:10.1029/2010JA016047.
· Wang.C.R.,Q.-G.Zong,F.L.Xiao,Z.P.Su,Y.F.Wang,C.Yue(2011),Therelationsbetweenmagnetosphericchorusandhissinsideandoutsidetheplasmasphereboundarylayer:Clusterobservation,J.Geophys.Res.SpacePhysics,116,A07221, doi:10.1029/2010JA016240.
· He.Z.G,F.Xiao,Q.-G.Zong,Y.F.Wang,L.X.Chen,C.Yue,S.Zhang(2011),Multi-satelliteobservationsonthestorm-timeenhancementsofenergeticouterzoneelectronfluxesdrivenbychoruswaves.ScienceChinaTechnologicalSciences, Volume 54, Number 8, 2209-2216, DOI: 10.1007/s11431-011-4445-6.
· Zhang,X.Y.,Q.-G.Zong,Y.F.Wang,H.Zhang,L.Xie,S.Y.Fu,C.J.Yuan,C.Yue,B.Yang,andZ.Y.Pu(2010),ULFwavesexcitedbynegative/positivesolarwinddynamicpressureimpulsesatgeosynchronousorbit,J.Geophys.Res.Space Physics, 115, A10221,doi:10.1029/2009JA015016.
ConferenceParticipating:
· Oral presentation at the 12th international conference on substorm (ICS-12), Ise, Japan, 2014
· Studenttutorial talkand Oral talk and Poster at GEM 2014 summer workshop, Portsmouth, Virginia,2014
· Poster at 2013 AGU Fall meeting, San Francisco, CA, USA,2013
· Oral talkat GEM-CEDAR Joint 2013 summer workshop, Boulder, Colorado,2013
· StudenttutorialtalkandOraltalkandPoster(BestStudentPoster)atGEM2013summerworkshop,Snowmass,Colorado, 2013
· Oral talk at THEMIS/ARTEMIS 2013 Spring SWG Meeting, Fairbanks, AL, USA,2013
· Poster at 2012 AGU Fall meeting, San Francisco, CA, USA,2012
· Oral talk at 2012 Mini-GEM, San Francisco, CA, USA,2012
· Oral talk and Poster at GEM 2012 summer workshop, Snowmass, Colorado, 2012
· Oral talk at International Symposium：From Solar Storm to Geomagnetic Storm, Shanghai, China,2011
· Oral talk at the 7thnational Space Weather Conference, Shanghai, China,2010
· Poster on the 10thinternational conference on substorm, LA, CA, USA,2010
· Oral talk at the 2ndinternational Space Weather Conference, Nanjing, China,2009
· Oral talk at the 25thChinese Geophysical Society Annual Conference, Hefei, China,2009
Summer school:
· Oral talk at 2012 Los Alamos National Lab Space Weather Summer School, New Mexico, USA,2012
· Oral talk atChina-UK Joint Summer School on Solar-Terrain Research, Nanjing, China,2009
Honors and Awards
· 2012 Vela Fellowship of Los Alamos National Lab Space Weather SummerSchool
· 2011 Chancellor’s Prize ofUCLA
· 2011 Departmental Fellowship ofUCLA
· 2010 The Leo KoGuan Fellowship of PekingUniversity
· 2009 Best Student Paper Award on the 25thannual meeting of the Chinese National GeophysicalUnion
· 2009 The Founder Fellowship of PekingUniversity
· 2008 The 1stPrize Excellent Graduate Thesis Award of HubeiProvince
· 2007 NationalFellowship
· 2007 The 2ndPrize of the National Electronic DesignCompetition
· 2007 Excellent Student Cadre of WuhanUniversity
· 2005-2007 Merit Student of the year 2005, 2006 and2007
· 2006 AMD Fellowship of WuhanUniversity
· 2005 The 1stPrize Fellowship of WuhanUniversity
TeachingExperience
· Outreach event inUCLA Nov. 2012
· Teaching Assistant of Introduction to GeoPhysics in PekingUniv. Sep.2010-Jan.2011
· Teaching Assistant of Introduction to GeoPhysics in PekingUniv. Sep.2009-Jan.2010
ProfessionalSkills
· Acquainted fundamental theory of Mathematics, Physics andProgramming
· Moderate spoken and written English and good reading and comprehensionskills
