DOCSLIB.ORG

Magnetospheric Physics in China

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Magnetospheric Physics in China SPACE SCIENCE ACTIVITIES IN CHINA Magnetospheric Physics in China CAO Jinbin, YANG Junying (Space Science Institute, School of space and environment, Beihang University, Beijing 100091) National Report 2016 Abstract In the past two years, many progresses were made in magnetospheric physics by using the data of Double Star Program, Cluster, THEMIS, RBSP, Swarm, MMS, ARTEMIS, MESSENGER missions etc., or by computer simulations. This paper briefly reviews these works based on papers selected from the 227 publications from Janu- ary 2016 to December 2017. The subjects cover almost sub-branches of magnetospheric physics, including geo- magnetic storm, magnetospheric substorm, magnetic reconnection, Solar wind-magnetosphere-ionosphere interac- 2018 tion, radiation belt, plasmasphere, outer magnetosphere, magnetotail, geomagnetic field, auroras and currents. Key words Magnetospheric, Geomagnetic storms, Magnetic reconnection E-mail: [email protected] 1. Geomagnetic Storms planning, and design of low-latitude electric power networks. Geomagnetic Sudden Commencements (SCs), charac- He, F., et al., [2] present multi satellite observations terized by a rapid enhancement in the rate of change of of the evolution of Subauroral Polarization Streams the geomagnetic field perturbation (dB/dt), are consid- (SAPS) during Intense Storms (ISs) and Quiet time ered to be an important source of large Geomagnetically Substorms (QSs). SAPS occurred during 37 ISs and 30 Induced Currents (GICs) in middle- and low-latitude QSs were analyzed. Generally, SAPS occur after the power grids. In Zhang et al., [1], the extreme inter- southward turning of the Interplanetary Magnetic Field planetary shock of 23 July 2012 is simulated under the (IMF) with time lags of 0–1.5 h for ISs and 0–2.5 h for assumption that it had hit the Earth with the result indi- QSs. SAPS usually occurred 0–3 h after the beginning cating the shock-caused SC would be 123 nT. Based on of storm main phases and 0–2 h after the substorm ex- statistics, the occurrence frequency of SCs with ampli- pansion onsets. The lifetimes of SAPS are generally tudes larger than the simulated one is estimated to be longer than the durations of southward IMF and storm approximately 0.2% during the past 147 years on the main phases. During QSs, the lifetimes of SAPS are Earth. During this extreme event, the simulation indi- shorter than the duration of the ISs. Superposed epoch cates that dB/dt, which is usually used as a proxy for analysis shows different evolution patterns of SAPS GICs, at a dayside low-latitude substation would exceed during ISs and QSs. The results of this study provide 100nT/min; this is very large for low-latitude regions. both physical insight and constrains to modeling the They then assess the GIC threat level based on the magnetosphere-ionosphere-thermosphere coupling. simulated geomagnetic perturbations. The results indi- The geomagnetic activity, which refers to the distur- cate that the risk remains at low level for the low- bances of the Earth's magnetic field, is caused by solar latitude power network on a global perspective. How- eruption phenomena and is one of the important space ever, the GIC risk may reach moderate or even high weather processes. Variations of the geomagnetic field level for some equatorial power networks due to the have several time scales, of which the long-term varia- influence of the equatorial electrojet. Results of this tions of decades to centuries are caused by the Earth's study have substantial implications for risk management, crust and the short-term variations of seconds to years CAO Jinbin, et al. Magnetospheric Physics in China are resulted from solar activity. In recent years, increas- dawn. (3) During the rapid growth of the storm main ing statistical studies have demonstrated that there are phase, the Averaged Total Flux (ATF) of ENA-O con- significant correlations between geomagnetic and solar tinues to increase, while the ENA-H to decrease syn- activities and Earth's climatic change. The coupling chronously. Correspondingly, the ATF ratio of ENA-O between the geomagnetic field and the Earth's atmos- to ENA-H grows in a way of being roughly proportional pheric system has motivated the researchers to explore to the increase of the absolute value of the ring current National Report 2016 the effects of geomagnetic activity on the Earth's wea- index Dst. ther and climatic systems. The purpose of Jin et al., [3] Coronal Mass Ejection (CME)-driven or Corotating is to review the progress of the domestic and foreign Interaction Region (CIR)-driven storms can change the investigations on the influences of the geomagnetic ac- electron distributions in the radiation belt dramatically, tivity on climatic elements, to present the latest research which can in turn affect the spacecraft in this region or results, and to explore the characteristics and possible induce geomagnetic effects. The twin Van Allen Probes, mechanisms of the impact of the geomagnetic activity launched on 30 August 2012, orbit near the equatorial on climatic elements. This paper provides us with the plane and across a wide range of L* with apogee at 5.8 2018 basis for further investigations of the impact of geo- Re and perigee at 620 km. Electron data from Van Allen magnetic activity on the Earth's weather and climate, Probes MagEIS and REPT instruments have been * * finally achieving a comprehensive and objective under- binned every 6 h at L =3 (defined as 2.5<L <3.5), 4 standing on the relationship between the geomagnetic (3.5<L*<4.5), 5 (4.5<L*<5.5). The superposed epoch activity and climatic elements. analysis shows that (1) CME storms induce more elec- Applying the method of statistical fitting based on the tron flux enhancement at L*=3 for energy channels be- probability distribution features of Start Pulse Height low 1 MeV than CIR storms; (2) CME storms induce (STPH) excited by ENA’s secondary electron, a set of more electron flux enhancement at L*=4 and 5 in the programs has been developed to process the TWINS energy channels above 1 MeV than CIR storms; (3) CIR (Two Wide-angle Imaging Neutral-atom Spectrometers) storms induce more electron flux enhancement at L*=4 satellite Level-0 data aiming to separate compositions of and 5 in the energy channels below 1 MeV than CME oxygen and hydrogen in ENA. Therein a model of storms; (4) intense CME induce more than 50 times flux STPH distribution needed for making the separation is enhancement for the energy channel around 400 keV at set up by fitting the satellite calibration data to the theo- L*=3; (5) intense CIR induce more than 50 times flux retic formula in being. Implementing the separation enhancement for the energy channel around 200 keV at method to the TWINS satellite measured data during a L*=4. The results of Shen et al., [5] are consistent with a great magnetic storm, the respective ENA-H and ENA- general picture of enhanced convection over a longer O differential flux distributions with Line-Of-Sight period for CIR storms which increased flux closer to (LOS) have been obtained, as well as their evolution geosynchronous orbit consistent with earlier studies, with the storm main phase growth. Hu et al., [4] found while CME storms likely produce deeper penetration of that: (1) There are obvious differences in both magn- enhanced flux and local heating which is greater at itudes and distributions of differential fluxes between higher energies at lower L*. ENA-H and ENA-O, implying from a certain angle the Based on 7 years' observations from Time History of differences between fluxes of energetic O+ and H+ ions Events and Macroscale Interactions during Substorms as ENAs’ sources. (2) During the period approaching (THEMIS), Liu et al., [6] investigate the statistical dis- the storm main phase, ENA-H displays intense Low tribution of electric field Pc5 ULF wave power under Altitude Emissions (LAEs) which appear in the aurora different geomagnetic activities and calculate the radial and sub-aurora region before midnight, suggesting diffusion coefficient due to electric field, for outer ra- strong proton precipitation coming from plasma-sheet diation belt electrons. A simple empirical expression of and RC (Ring Current) region into the lower atmosphere is also derived. Subsequently, they compare to previous below exobase; while the oxygen has no obvious LAEs, D-LL models and find similar Kp dependence with the but showing intensive fluxes along LOSs that traverse model, which is also based on in situ electric field extensive RC region located mainly in the magnetic measurements. The absolute value of is constantly local time sectors of post-midnight, pre-dusk and around higher than, probably due to the limited orbital coverage ·155· SPACE SCIENCE ACTIVITIES IN CHINA of CRRES. The differences between and the commonly ergy conversion process in the magnetotail before it can used and models are significant, especially in Kp de- provide the earthward energy flux in the magnetotail for pendence and energy dependence. Possible reasons for this intense storm. The strongest energy transport ob- these differences and their implications are discussed. served by the nightside probes occurs in the main phase. The diffusion coefficient provided in this paper, which However, the strongest energy measured by the dayside also has energy dependence, will be an important con- satellites is in the recovery phase without intense activi- tributor to quantify the radial diffusion process of radia- ties, two hours later. Different features of the energy National Report 2016 tion belt electrons. transport in the three phases of the storm may be closely Using data from ground-based magnetometers and related to the different physical processes such as the HF Doppler sounder, Ouyang, et al., [7] study ULtralow energy entry, westward drift, particle injection or other Frequency (ULF) waves excited during the Storm Sud- potential mechanisms.
Load more

Recommended publications
  • Sun-Earth System Interaction Studies Over Vietnam: an International Cooperative Project
    Ann. Geophys., 24, 3313–3327, 2006 www.ann-geophys.net/24/3313/2006/ Annales © European Geosciences Union 2006 Geophysicae Sun-Earth System Interaction studies over Vietnam: an international cooperative project C. Amory-Mazaudier1, M. Le Huy2, Y. Cohen3, V. Doumbia4,*, A. Bourdillon5, R. Fleury6, B. Fontaine7, C. Ha Duyen2, A. Kobea4, P. Laroche8, P. Lassudrie-Duchesne6, H. Le Viet2, T. Le Truong2, H. Luu Viet2, M. Menvielle1, T. Nguyen Chien2, A. Nguyen Xuan2, F. Ouattara9, M. Petitdidier1, H. Pham Thi Thu2, T. Pham Xuan2, N. Philippon**, L. Tran Thi2, H. Vu Thien10, and P. Vila1 1CETP/CNRS, 4 Avenue de Neptune, 94107 Saint-Maur-des-Fosses,´ France 2Institute of Geophysics, Vietnamese Academy of Science and Technology , 18 Hoang Quoc Viet, Cau Giay, Hano¨ı, Vietnam 3IPGP, 4 Avenue de Neptune, 94107 Saint-Maur-des-Fosses,´ France 4Laboratoire de Physique de l’Atmosphere,` Universite´ d’Abidjan Cocody 22 B.P. 582, Abidjan 22, Coteˆ d’Ivoire 5Institut d’Electronique et de Tel´ ecommunications,´ Universite´ de Rennes Batˆ 11D, Campus Beaulieu, 35042 Rennes, cedex,´ France 6ENST, Universite´ de Bretagne Occidentale, CS 83818, 29288 Brest, cedex´ 3, France 7CRC , Faculte´ des Sciences, 6 Boulevard Gabriel, F 21004 Dijon cedex´ 04, France 8Unite´ de Recherche Environnement Atmospherique,´ ONERA, 92332 Chatillon, cedex,´ France 9University of Koudougou, Burkina Faso 10Laboratoire signaux et systemes,` CNAM, 292 Rue saint Martin, 75141 Paris cedex´ 03, France *V. Doumbia previously signed V. Doumouya **affiliation unknown Received: 15 June 2006 – Revised: 19 October 2006 – Accepted: 8 November 2006 – Published: 21 December 2006 Abstract. During many past decades, scientists from var- the E, F1 and F2 ionospheric layers follow the variation of ious countries have studied separately the atmospheric mo- the sunspot cycle.
    [Show full text]
  • Theory, Modeling, and Integrated Studies in the Arase (ERG) Project
    Seki et al. Earth, Planets and Space (2018) 70:17 https://doi.org/10.1186/s40623-018-0785-9 FULL PAPER Open Access Theory, modeling, and integrated studies in the Arase (ERG) project Kanako Seki1* , Yoshizumi Miyoshi2, Yusuke Ebihara3, Yuto Katoh4, Takanobu Amano1, Shinji Saito5, Masafumi Shoji2, Aoi Nakamizo6, Kunihiro Keika1, Tomoaki Hori2, Shin’ya Nakano7, Shigeto Watanabe8, Kei Kamiya5, Naoko Takahashi1, Yoshiharu Omura3, Masahito Nose9, Mei‑Ching Fok10, Takashi Tanaka11, Akimasa Ieda2 and Akimasa Yoshikawa11 Abstract Understanding of underlying mechanisms of drastic variations of the near-Earth space (geospace) is one of the current focuses of the magnetospheric physics. The science target of the geospace research project Exploration of energiza‑ tion and Radiation in Geospace (ERG) is to understand the geospace variations with a focus on the relativistic electron acceleration and loss processes. In order to achieve the goal, the ERG project consists of the three parts: the Arase (ERG) satellite, ground-based observations, and theory/modeling/integrated studies. The role of theory/modeling/integrated studies part is to promote relevant theoretical and simulation studies as well as integrated data analysis to combine diferent kinds of observations and modeling. Here we provide technical reports on simulation and empirical models related to the ERG project together with their roles in the integrated studies of dynamic geospace variations. The simu‑ lation and empirical models covered include the radial difusion model of the radiation belt electrons, GEMSIS-RB and RBW models, CIMI model with global MHD simulation REPPU, GEMSIS-RC model, plasmasphere thermosphere model, self-consistent wave–particle interaction simulations (electron hybrid code and ion hybrid code), the ionospheric electric potential (GEMSIS-POT) model, and SuperDARN electric feld models with data assimilation.
    [Show full text]
  • Locations of Chorus Emissions Observed by the Polar Plasma Wave Instrument K
    JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 115, A00F12, doi:10.1029/2009JA014579, 2010 Click Here for Full Article Locations of chorus emissions observed by the Polar Plasma Wave Instrument K. Sigsbee,1 J. D. Menietti,1 O. Santolík,2,3 and J. S. Pickett1 Received 18 June 2009; revised 20 November 2009; accepted 17 December 2009; published 8 June 2010. [1] We performed a statistical study of the locations of chorus emissions observed by the Polar spacecraft’s Plasma Wave Instrument (PWI) from March 1996 to September 1997, near the minimum of solar cycles 22/23. We examined how the occurrence of chorus emissions in the Polar PWI data set depends upon magnetic local time, magnetic latitude, L shell, and L*. The Polar PWI observed chorus most often over a range of magnetic local times extending from about 2100 MLT around to the dawn flank and into the dayside magnetosphere near 1500 MLT. Chorus was least likely to be observed near the dusk flank. On the dayside, near noon, the region in which Polar observed chorus extended to larger radial distances and higher latitudes than at other local times. Away from noon, the regions in which chorus occurred were more restricted in both radial and latitudinal extent. We found that for high‐latitude chorus near local noon, L* provides a more reasonable mapping to the equatorial plane than the standard L shell. Chorus was observed slightly more often when the magnitude of the solar wind magnetic field BSW was greater than 5 nT than it was for smaller interplanetary magnetic field strengths.
    [Show full text]
  • The Near-Earth Plasma Environment
    Space Sci Rev (2012) 168:23–112 DOI 10.1007/s11214-012-9872-6 The Near-Earth Plasma Environment Robert F. Pfaff Jr. Received: 1 March 2012 / Accepted: 3 March 2012 / Published online: 20 June 2012 © US Government 2012 Abstract An overview of the plasma environment near the earth is provided. We describe how the near-earth plasma is formed, including photo-ionization from solar photons and impact ionization at high latitudes from energetic particles. We review the fundamental characteristics of the earth’s plasma environment, with emphasis on the ionosphere and its interactions with the extended neutral atmosphere. Important processes that control iono- spheric physics at low, middle, and high latitudes are discussed. The general dynamics and morphology of the ionized gas at mid- and low-latitudes are described including electro- dynamic contributions from wind-driven dynamos, tides, and planetary-scale waves. The unique properties of the near-earth plasma and its associated currents at high latitudes are shown to depend on precipitating auroral charged particles and strong electric fields which map earthward from the magnetosphere. The upper atmosphere is shown to have profound effects on the transfer of energy and momentum between the high-latitude plasma and the neutral constituents. The article concludes with a discussion of how the near-earth plasma responds to magnetic storms associated with solar disturbances. Keywords Ionosphere · Upper atmosphere · Electric fields 1 Introduction In this article we discuss the near-earth plasma environment, for which the ionosphere is the natural focus. Because this ionized gas co-exists with the neutral atmospheric gas to which it is coupled, the ionized/neutral gas system is more properly considered a partially ionized gas rather than a medium consisting of two distinct, independent fluids.
    [Show full text]
  • LCSH Section E
    E (The Japanese word) E. J. Pugh (Fictitious character) E-waste [PL669.E] USE Pugh, E. J. (Fictitious character) USE Electronic waste BT Japanese language—Etymology E.J. Thomas Performing Arts Hall (Akron, Ohio) e World (Online service) e (The number) UF Edwin J. Thomas Performing Arts Hall (Akron, USE eWorld (Online service) UF Napier number Ohio) E. Y. Mullins Lectures on Preaching Number, Napier BT Centers for the performing arts—Ohio UF Mullins Lectures on Preaching BT Logarithmic functions E-journals BT Preaching Transcendental numbers USE Electronic journals E-zines (May Subd Geog) Ë (The Russian letter) E.L. Kirchner Haus (Frauenkirch, Switzerland) UF Ezines BT Russian language—Alphabet USE In den Lärchen (Frauenkirch, Switzerland) BT Electronic journals E & E Ranch (Tex.) E. L. Pender (Fictitious character) Zines UF E and E Ranch (Tex.) USE Pender, Ed (Fictitious character) E1 (Mountain) (China and Nepal) BT Ranches—Texas E-lists (Electronic discussion groups) USE Lhotse (China and Nepal) E-605 (Insecticide) USE Electronic discussion groups E2ENP (Computer network protocol) USE Parathion E. London Crossing (London, England) USE End-to-End Negotiation Protocol (Computer E.1027 (Roquebrune-Cap-Martin, France) USE East London River Crossing (London, England) network protocol) UF E1027 (Roquebrune-Cap-Martin, France) E. London River Crossing (London, England) E10 Motorway Maison en bord du mer E.1027 (Roquebrune- USE East London River Crossing (London, England) USE Autoroute E10 Cap-Martin, France) Ê-luan Pi (Taiwan) E22 Highway (Sweden) Villa E.1027 (Roquebrune-Cap-Martin, France) USE O-luan-pi, Cape (Taiwan) USE Väg E22 (Sweden) BT Dwellings—France E-mail art E190 (Jet transport) E.A.
    [Show full text]
  • The Atmospheric Global Electric Circuit: an Overview
    The atmospheric global electric circuit: An overview Devendraa Siingha,b*, V. Gopalakrishnana,, R. P. Singhc, A. K. Kamraa, Shubha Singhc, Vimlesh Panta, R. Singhd, and A. K. Singhe aIndian Institute of Tropical Meteorology, Pune-411 008, India bInstitute of Environmental Physics, University of Tartu, 18, Ulikooli Street, Tartu- 50090, Estonia cDepartment of Physics, Banaras Hindu University, Varanasi-221 005, India dIndian Institute of Geomagnetism, Mumbai-410 218, India ePhysics Department, Bundelkhand University, Jhansi, India Abstract: Research work in the area of the Global Electric Circuit (GEC) has rapidly expanded in recent years mainly through observations of lightning from satellites and ground-based networks and observations of optical emissions between cloud and ionosphere. After reviewing this progress, we critically examine the role of various generators of the currents flowing in the lower and upper atmosphere and supplying currents to the GEC. The role of aerosols and cosmic rays in controlling the GEC and linkage between climate, solar-terrestrial relationships and the GEC has been briefly discussed. Some unsolved problems in this area are reported for future investigations. ----------------------------------------------------------------------------------------------------------- - *Address for corrspondence Institute of Environmental Physics, University of Tartu, 18, Ulikooli Street Tartu-50090, Estonia e-mail; [email protected] [email protected] Fax +37 27 37 55 56 1 1. Introduction The global electric circuit (GEC) links the electric field and current flowing in the lower atmosphere, ionosphere and magnetosphere forming a giant spherical condenser (Lakhina, 1993; Bering III, 1995; Bering III et al., 1998; Rycroft et al., 2000; Siingh et al., 2005), which is charged by the thunderstorms to a potential of several hundred thousand volts (Roble and Tzur, 1986) and drives vertical current through the atmosphere’s columnar resistance.
    [Show full text]
  • International Civil Aviation Organization
    METWARN/I TF/2 – WP/6 Agenda Item 2 (a) 19/04/12 International Civil Aviation Organization THE SECOND MEETING OF ASIA/PACIFIC METEOROLOGICAL ADVISORIES AND WARNINGS IMPLEMENTATION TASK FORCE (METWARN/I TF/2) Bangkok, Thailand, 19 – 20 April 2012 Agenda Item 2: Review educational material a) Monitor the developments of IAVWOPSG and METWSG with reference to guidance on radioactive cloud and Tsunami GLOBAL PROGRESS ON GUIDANCE ON RADIOACTIVE CLOUD (Presented by the Secretariat) SUMMARY This paper presents an update on the global progress on guidance on radioactive cloud information. This paper relates to: Strategic Objectives: A. Safety Global Plan Initiatives: GPI-18 Aeronautical information GPI-19 Meteorological Systems 1. INTRODUCTION 1.1 The Twentieth Meeting of the Asia/Pacific Air Navigation Planning and Implementation Regional Group (APANPIRG/20) Conclusion 20/69 calls for further guidance on the issuance of SIGMET on radioactive cloud. The International Airways Volcano Watch Operations Group (IAVWOPSG) determined that additional Standards were not necessary (IAVWOPSG/5 Decision 5/23 refers) and that guidance be included in Part II of the Manual on Volcanic Ash, Radioactive Material and Toxic Chemical Clouds (Doc 9691) (IAVWOPSG/5 Conclusion 5/24 refers). METWARN/I TF/2 – WP/6 -2- Agenda Item 2a 19/04/12 2. DISCUSSION 2.1 The IAVWOPSG/6 meeting in Dakar, Senegal, 19 to 23 September 2011, concluded that ad-hoc groups continue with tasks identified to address key issues concerning the importance, complexity and lack of expertise on radioactive clouds. The meeting report and conclusions from IAVWOPSG/6 are provided in the Attachment for review by the METWARN/I TF/2 and can be accessed on the web at http://www2.icao.int/en/anb/met/iavwopsg/Lists/Meetings/DispForm.aspx?ID=6.
    [Show full text]
  • A Study of Transient Variations in the Earth's Electromagnetic Field At
    Ann. Geophysicae 16, 677±697 (1998) Ó EGS ± Springer-Verlag 1998 A study of transient variations in the Earth's electromagnetic ®eld at equatorial electrojet latitudes in western Africa (Mali and the Ivory Coast) 1 2 3 1 4 4 5 J. Vassal Ã, M. Menvielle Ã, Y. Cohen , M. Dukhan , V. Doumouya , K. Boka , O. Fambitakoye 1 Laboratoire de Ge ophysique, ORSTOM, 72 route d'Aulnay, F-93140 Bondy, France 2 Equipe de Physique de la Terre et des PlaneÁ tes (URA 1369), BaÃt. 504, Universite Paris Sud, F-91405 Orsay cedex, France 3 Laboratoire de Ge omagne tisme, IPGP, B89, 4 Place Jussieu, F-75252 Paris cedex 05, France 4 Laboratoire de Physique de l'AtmospheÁ re, Universite d'Abidjan, Abidjan, Cote D'Ivoire 5 Laboratoire de Ge ophysique, ORSTOM, 72 route d'Aulnay, F-93140 Bondy, France, now retired Received: 20 February 1997 / Revised: 25 July 1997 / Accepted: 29 July 1997 Abstract. In the framework of the French-Ivorian possible to perform. In the case of irregular variations, participation to the IEEY, a network of 10 electromag- the source eect related to the equatorial electrojet is netic stations were installed at African longitudes. The also discussed. A Gaussian model of equatorial electro- aim of this experiment was twofold: ®rstly, to study jet was considered, and apparent resistivities were the magnetic signature of the equatorial electrojet on computed for two models of strati®ed Earth corre- the one hand, and secondly, to characterize the induced sponding to the average resistive structure of the two electric ®eld variations on the other hand.
    [Show full text]
  • A Comparison of Equatorial Electrojet in Peru and East Brazil R.G
    Send Orders of Reprints at [email protected] The Open Atmospheric Science Journal, 2013, 7, 29-36 29 Open Access A Comparison of Equatorial Electrojet in Peru and East Brazil R.G. Rastogi1, H. Chandra*,1, Rahul Shah1, N.B. Trivedi2 and S.L. Fontes3 1Physical Research Laboratory, Ahmedabad 380009, India 2National Institute of Space Research, Sao Jose dos Campos, Brazil 3Observatario Nacional – ON/MCT, Rio de Janeiro, Brazil Abstract: The paper describes the characteristics of the equatorial electrojet at Huancayo (HUA, 12.1oS, 75.3oW, inclination 1.5oN, declination 1.0oE) in western side of South America, where the geomagnetic field is aligned almost along the geographic meridian, and at Itinga (ITI, 4.3oS, 47.0oW, inclination 1.4oN, declination 19.3oW) in eastern part of South America, where the geomagnetic field is aligned about 19o west of the geographic meridian; although the mean intensity of the magnetic field in the two regions are almost of the same order. Further comparisons are made of the current at Itinga and at Tatuoca (TTB, 1.2oS, 48.5oW, inclination 7.8o N, declination 18.7oW), a low latitude station in the same longitude sector. The daily range of horizontal component of the geomagnetic field, H, is shown to be almost 16% higher at HUA compared to that at ITI. The daily variation of the eastward field, Y, showed a strong minimum of -40 nT around 13-14 hr LT at ITI whereas very low values were observed at HUA with a positive peak of about 4 nT around 11- 12 hr LT.
    [Show full text]
  • Recent Advances in Atmospheric, Solar-Terrestrial Physics and Space
    Recent advances in atmospheric, solar-terrestrial physics and space weather from a north-south network of scientist [2006-2016] Part B: results and capacity building Christine Amory-Mazaudier, Rolland Fleury, Monique Petitdidier, Serge Soula, Frédéric Masson, Jospeh Davila, Patricia Doherty, Ana Georgina Elias, Sharafat Gadimova, Jonathan Makela, et al. To cite this version: Christine Amory-Mazaudier, Rolland Fleury, Monique Petitdidier, Serge Soula, Frédéric Masson, et al.. Recent advances in atmospheric, solar-terrestrial physics and space weather from a north-south network of scientist [2006-2016] Part B: results and capacity building. Sun and Geosphere, BBC SWS Regional Network, 2017, 12 (Supplement), pp.21 - 69. hal-01796656 HAL Id: hal-01796656 https://hal.archives-ouvertes.fr/hal-01796656 Submitted on 6 Oct 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Recent Advances in Atmospheric, Solar-Terrestrial Physics and Space Weather From a North-South network of scientists [2006-2016]" PART B : Results and Capacity Building Amory-Mazaudier, C. 1,2 , Fleury, R. 3, Petitdidier, M. 4 , Soula, S. 5, Masson, F. 6, GIRGEA team 1*, Davila, J. 7, Doherty, P. 8, Elias, A.G. 9, Gadimova, S.10 ,Makela, J.
    [Show full text]
  • =C SUMMARY ‘R B
    NASA SP-7601 Supplement 1 I OGO w PROGRAM =C SUMMARY ‘r b I NATIONAL AERONAUTIC S AND SPA( E ADMINISTRATlON USA NASA SP-7601 Supplement 1 V OGO BY John E. Jackson Prepared by National Space Science Data Center NASA Goddard Space Flight Center Scientific arid Techriical Illformatior1 Braiich 1978 NATIONAL AERONAUTI( S AND SPA( E AIIMINISTRATION Washington, D.C. This document is available from the National Technical Information Service (NTIS). Springfield, Virginia 22161, at the price code A06 ($6.50 domestic; $1 3.00 foreign). ATMOSPHERE PLASMAPAUSE 0 COMPOSITION 0 DENSITY 0 SOLAR RADIATION iURORA PARTICLES EM lSSl0N 0 SOLAR WIND FIELDS 0 COSMIC RAYS MAGNETOSPHERE ULTRAVIOLET 0 FIELDS 0 SODIUM 0 WAVES 0 OXYGEN 0 PARTICLES NITROGEN ORBITING GEOPHYSICAL OBSERVATORIES 1964- 197 1 ... I11 CONTENTS SECTION PAGE I. FOREWORD ........... ................... ................................................ ....................................... 1-1 ....................................................... 11-1 ................................................... .................................... 5. OGO 5 Results ...................... ............................ ........................................ 111-1 ......................................................... 111-1 1 IV. SPACECRAFT AND EXPERIMENT LITERATURE REFERENCES .............. ......................... IV-1 ....................................................... IV- 1 c. OGO 3 ......... .......................................... ..................................... ...................
    [Show full text]
  • 太空|TAIKONG 国际空间科学研究所 - 北京 ISSI-BJ Magazine No
    太空|TAIKONG 国际空间科学研究所 - 北京 ISSI-BJ Magazine No. 19 May 2020 IMPRINT FOREWORD 太空 | TAIKONG There is little doubt that today's political they undoubtedly play in how this system ISSI-BJ Magazine and business leaders, as well as society works and how it can be monitored. License: CC BY-NC-ND 4.0 at large, must face seriously the reality of global climate change and, in a broader This is not to say that these interactions perspective, define appropriate actions have not received their due attention. to protect our fragile high-technology They have. The vigorous and robust Address: No.1 Nanertiao, society against the broad spectrum research in Space Weather, which is Zhongguancun, of natural and anthropogenic hazards centered on these interactions, is one of Haidian District, which threatens it. There is an equal the highlights of Earth System Science in Beijing, China need for the scientific community to our still-young century. It is the interplay Postcode: 100190 and interaction of the Space Weather Phone: +86-10-62582811 offer an adequate response to this Website: www.issibj.ac.cn major scientific challenge and strive System with the theatre of Global together at the international level to Change, namely the troposphere, offer the science-based information oceans, land, and different life forms needed for society to take meaningful occupying the surface of Earth, which Authors actions. The fact that our science we believe have attracted insufficient sometimes still fails to give consistent, attention: these interactions are likely See the
    [Show full text]