You have free access to this content

Journal of Geophysical Research: Space Physics (1978–2012)

Cover image for Journal of Geophysical Research: Space Physics (1978–2012)

June 2011

Volume 116, Issue A6

Currently known as: Journal of Geophysical Research: Space Physics

  1. Ionosphere and Upper Atmosphere

    1. Top of page
    2. Ionosphere and Upper Atmosphere
    3. Magnetospheric Physics
    4. Solar and Heliospheric Physics
    1. You have free access to this content
      Solar cycle dependence of solar wind energy coupling to the thermosphere

      William J. Burke

      Article first published online: 1 JUN 2011 | DOI: 10.1029/2011JA016437

      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Efficient solar wind energy coupling to storm time thermosphere depends on F10.7
      • Estimates storm time energy partitioning between thermosphere and ring current
      • Method adapts to specify solar wind/thermosphere energy coupling during storms
    2. You have free access to this content
      Latitudinal dependence of the ionospheric response to solar eclipse of 15 January 2010

      Gang Chen, Zhengyu Zhao, Baiqi Ning, Zhongxin Deng, Guobin Yang, Chen Zhou, Ming Yao, Shipeng Li and Ning Li

      Article first published online: 1 JUN 2011 | DOI: 10.1029/2010JA016305

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • The eclipse lag of F2 layer is directly proportional to its height
      • An unusual enhancement following the eclipse minimum in foF2 was observed
      • Prereversal enhancement and the following reversal induced the F2 enhancement
    3. You have free access to this content
      Large-scale gravity wave characteristics simulated with a high-resolution global thermosphere-ionosphere model

      L. C. Gardner and R. W. Schunk

      Article first published online: 2 JUN 2011 | DOI: 10.1029/2010JA015629

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Breaking gravity waves in the lower thermosphere will generate large-scale waves
    4. You have free access to this content
      DEMETER observations of the ionospheric trough over HAARP in relation to HF heating experiments

      D. Piddyachiy, T. F. Bell, J.-J. Berthelier, U. S. Inan and M. Parrot

      Article first published online: 3 JUN 2011 | DOI: 10.1029/2010JA016128

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • No correlation between HF transmissions and Ne irregularities established
      • The ionospheric trough is the primary source of Ne variations above HAARP
      • Possible experimental techniques for HF heating observations
    5. You have free access to this content
      On the inception of streamers from sprite halo events produced by lightning discharges with positive and negative polarity

      Jianqi Qin, Sebastien Celestin and Victor P. Pasko

      Article first published online: 3 JUN 2011 | DOI: 10.1029/2010JA016366

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Investigating the conditions in which sprite streamers are initiated
      • Explaining the observational features related to the inception of sprites
      • Investigating the lightning polarity asymmetries in the triggering of sprites
    6. You have free access to this content
      Lightning-generated whistler waves observed by probes on the Communication/Navigation Outage Forecast System satellite at low latitudes

      R. H. Holzworth, M. P. McCarthy, R. F. Pfaff, A. R. Jacobson, W. L. Willcockson and D. E. Rowland

      Article first published online: 8 JUN 2011 | DOI: 10.1029/2010JA016198

      • image
      • image
      • image
      • image

      Key Points

      • Copius lightning-generated whistlers seen from 400 to 850 km in the ionosphere
      • Large lightning-generated electric fields seen in spread F
    7. You have free access to this content
      FORMOSAT-3/COSMIC E region observations and daytime foE at middle latitudes

      Loredana Perrone, Andrei V. Mikhailov and Lidija P. Korsunova

      Article first published online: 8 JUN 2011 | DOI: 10.1029/2010JA016411

      • image
      • image
      • image
      • image
      • image

      Key Points

      • COSMIC-observed NmE values in the NmE enhanced zone don't coincide with IRI NmE
      • IRI model correctly describes monthly median NmE
      • Sporadic E contributes to NmE observed by COSMIC
    8. You have free access to this content
      Magnetospheric injection of ELF/VLF waves with modulated or steered HF heating of the lower ionosphere

      M. B. Cohen, U. S. Inan, D. Piddyachiy, N. G. Lehtinen and M. Gołkowski

      Article first published online: 16 JUN 2011 | DOI: 10.1029/2010JA016194

      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Derived radiation patterns of modulated HF heating into magnetosphere
      • Analyzed frequency dependence of magnetospheric injection from HF heating
      • Compared beam steering techniques with amplitude modulation
    9. You have free access to this content
      Temporal development of the magnetic zenith effect

      F. Honary, N. Borisov, M. Beharrell and A. Senior

      Article first published online: 16 JUN 2011 | DOI: 10.1029/2010JA016029

      • image
      • image
      • image
      • image
      • image

      Key Points

      • Experimental investigation of the magnetic zenith effect in artificial heating
      • A new theoretical explanation for the MZ electron temperature enhancement
      • The angle of maximum temperature enhancement and its fast manifestation
    10. You have free access to this content
      Large-amplitude transmitter-associated and lightning-associated whistler waves in the Earth's inner plasmasphere at L < 2

      A. Breneman, C. Cattell, J. Wygant, K. Kersten, L. B. Wilson III, S. Schreiner, P. J. Kellogg and K. Goetz

      Article first published online: 16 JUN 2011 | DOI: 10.1029/2010JA016288

      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Observations of largest whistler waves in the inner plasmasphere
      • Waves show semiperiodic polarization reversals
      • Waves may strongly affect electrons in inner plasmasphere
    11. You have free access to this content
      Long-term study of medium-scale traveling ionospheric disturbances using O I 630 nm all-sky imaging and ionosonde over Brazilian low latitudes

      D. C. M. Amorim, A. A. Pimenta, J. A. Bittencourt and P. R. Fagundes

      Article first published online: 18 JUN 2011 | DOI: 10.1029/2010JA016090

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Analysis of the occurrence of MSTIDs over the Brazilian sector
      • Extensive analysis of all-sky images using a large data set
      • Effects caused by the passage of MSTIDs at both all-sky and digisonde data
    12. You have free access to this content
      Space charge effects and arc properties of simulated lightning on Venus

      A. Robledo-Martinez, H. Sobral and A. Ruiz-Meza

      Article first published online: 18 JUN 2011 | DOI: 10.1029/2010JA015856

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Cloud-to-ground lightning on Venus is unlikely due to negative ion formation
      • We produce realistic simulation of Venus lightning in the lab
      • Lightning modifies Venus’s atmosphere through fragmentation of CO2 into CO and O
    13. You have free access to this content
      The ionospheric midlatitude trough observed by FORMOSAT-3/COSMIC during solar minimum

      I. T. Lee, W. Wang, J. Y. Liu, C. Y. Chen and C. H. Lin

      Article first published online: 18 JUN 2011 | DOI: 10.1029/2010JA015544

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
    14. You have free access to this content
      TIMED/SABER observations of global cold point mesopause variability at diurnal and planetary wave scales

      Sherine Rachel John and Karanam Kishore Kumar

      Article first published online: 22 JUN 2011 | DOI: 10.1029/2010JA015945

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Global cold point mesopause
      • Tidal modulations of mesopause height
      • Planetary wave modulation of mesopause height
    15. You have free access to this content
    16. You have free access to this content
      Spread F occurrence over a southern anomaly crest location in Brazil during June solstice of solar minimum activity

      C. M. N. Candido, I. S. Batista, F. Becker-Guedes, M. A. Abdu, J. H. A. Sobral and H. Takahashi

      Article first published online: 24 JUN 2011 | DOI: 10.1029/2010JA016374

      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Spread F
      • MSTIDs
      • Solar minimum
    17. You have free access to this content
      The 2009 Samoa and 2010 Chile tsunamis as observed in the ionosphere using GPS total electron content

      David A. Galvan, Attila Komjathy, Michael P. Hickey and Anthony J. Mannucci

      Article first published online: 25 JUN 2011 | DOI: 10.1029/2010JA016204

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Show disturbances in ionospheric total electron content associated with tsunamis
      • Compare TEC observations with theoretical model results
      • Demonstrate current challenges in observing tsunami-driven TIDs
    18. You have free access to this content
      Response of the tropical mesopause to the longest annular solar eclipse of this millennium

      S. G. Sumod, T. K. Pant, C. Vineeth, M. M. Hossain and M. Antonita

      Article first published online: 25 JUN 2011 | DOI: 10.1029/2010JA016326

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • The paper presents mesopause temperature enhancement during a solar eclipse
      • We report observations of gravity waves of periodicity ∼30 min during the eclipse
      • We present evidence for enhanced exothermic chemistry during the eclipse
    19. You have free access to this content
      Ionospheric disturbances triggered by the 11 March 2011 M9.0 Tohoku earthquake

      Jann-Yenq Liu, Chia-Hung Chen, Chien-Hung Lin, Ho-Fang Tsai, Chieh-Hung Chen and Masashi Kamogawa

      Article first published online: 28 JUN 2011 | DOI: 10.1029/2011JA016761

      • image
      • image
      • image
      • image

      Key Points

      • Ionospheric disturbances generated by earthquake and tsunami
      • Greatest disturbances ever seen containing signatures of following waves
      • Rayleigh, acoustic, and tsunami-generated waves
    20. You have free access to this content
      Spatial sampling of the thermospheric vertical wind field at auroral latitudes

      C. Anderson, T. Davies, M. Conde, P. Dyson and M. J. Kosch

      Article first published online: 30 JUN 2011 | DOI: 10.1029/2011JA016485

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Bistatic observations of thermospheric vertical winds
      • Spatial scales of vertical wind correlation
      • Relationship between vertical winds and horizontal divergence
    21. You have free access to this content
      Sensitivity studies of equatorial topside electron and ion temperatures

      R. H. Varney, D. L. Hysell and J. D. Huba

      Article first published online: 30 JUN 2011 | DOI: 10.1029/2011JA016549

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Topside plasma temperatures are strongly affected by winds and electric fields
      • The rearrangement of plasma density is far more important than local processes
      • Accurate descriptions of heating from photoelectron transport are vital
  2. Magnetospheric Physics

    1. Top of page
    2. Ionosphere and Upper Atmosphere
    3. Magnetospheric Physics
    4. Solar and Heliospheric Physics
    1. You have free access to this content
      Multi-instrument observations of soft electron precipitation and its association with magnetospheric flows

      Jun Liang, E. Spanswick, M. J. Nicolls, E. F. Donovan, D. Lummerzheim and W. W. Liu

      Article first published online: 1 JUN 2011 | DOI: 10.1029/2010JA015867

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Magnetospheric fast flows produce soft electron precipitation in the ionosphere
      • Soft electron precipitation is mainly caused by enhanced scattering by wave
      • The auroral morphology is consistent with the adiabatic drift of electrons
    2. You have free access to this content
      Relationship between ULF wave mode mix, equatorial electric fields, and ground magnetometer data

      M. D. Sciffer and C. L. Waters

      Article first published online: 2 JUN 2011 | DOI: 10.1029/2010JA016307

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • ULF wave model calculates the ratio of e at the equator to B on the ground
      • Ozeke [2009] underestimated the ULF wave magnetic field on the ground
      • This difference is found to be caused by assuming a decoupled wave mode model
    3. You have free access to this content
      Intensification of the Cowling current in the global MHD simulation model

      B. B. Tang, C. Wang, Y. Q. Hu and J. R. Kan

      Article first published online: 8 JUN 2011 | DOI: 10.1029/2010JA016320

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • M-I coupling in the Global MHD simulation
      • Intensification of the ionospheric Cowling current
      • Blockage of the latitude current in the midnight sector of the ionosphere
    4. You have free access to this content
      Pi1B pulsations as a possible driver of Alfvénic aurora at substorm onset

      M. R. Lessard, E. J. Lund, H. M. Kim, M. J. Engebretson and K. Hayashi

      Article first published online: 8 JUN 2011 | DOI: 10.1029/2010JA015776

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Alfvenic aurora provides 10–20% of the energy flux for this onset
      • We relate Pi1B pulsations to Alfvenic aurora
      • We show Pi1B from GOES to the ground, passing through the ionosphere
    5. You have free access to this content
      Modulation of whistler mode chorus waves: 2. Role of density variations

      W. Li, J. Bortnik, R. M. Thorne, Y. Nishimura, V. Angelopoulos and L. Chen

      Article first published online: 9 JUN 2011 | DOI: 10.1029/2010JA016313

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Chorus modulation is frequently associated with density variations
      • Density depletions are well correlated with increases in chorus wave amplitude
      • Density increases lead to chorus amplification and reduce wave frequency
    6. You have free access to this content
      Two-dimensional correlation functions for density and magnetic field fluctuations in magnetosheath turbulence measured by the Cluster spacecraft

      J.-S. He, E. Marsch, C.-Y. Tu, Q.-G. Zong, S. Yao and H. Tian

      Article first published online: 9 JUN 2011 | DOI: 10.1029/2010JA015974

      • image
      • image
      • image
      • image
      • image

      Key Points

      • First time to reveal the 2-D correlation function in magnetosheath turbulence
      • Find the 2-D correlation function to be composed of two populations
      • Major population for fluctuations with wave vectors transverse to B0
    7. You have free access to this content
      On the origin of fluctuations in the cusp diamagnetic cavity

      K. Nykyri, A. Otto, E. Adamson and A. Tjulin

      Article first published online: 9 JUN 2011 | DOI: 10.1029/2010JA015888

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Many B field fluctuations in the cusp DMC are reconnection signatures
      • Many B field fluctuations in the DMC are boundary motion
      • Wave heating may not be the dominant source for ion acceleration in DMCs
    8. You have free access to this content
      Modulation of whistler mode chorus waves: 1. Role of compressional Pc4–5 pulsations

      W. Li, R. M. Thorne, J. Bortnik, Y. Nishimura and V. Angelopoulos

      Article first published online: 9 JUN 2011 | DOI: 10.1029/2010JA016312

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Whistler wave intensity can be modulated by compressional Pc4-5 pulsations
      • This modulation preferentially occurs at large L shells in the dawn sector
      • Wave amplitude increases as magnetic field decreases and density increases
    9. You have free access to this content
      Saturn's low-latitude boundary layer: 1. Properties and variability

      A. Masters, D. G. Mitchell, A. J. Coates and M. K. Dougherty

      Article first published online: 11 JUN 2011 | DOI: 10.1029/2010JA016421

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Saturn has a low-latitude boundary layer
      • Unlike Earth, the layer is not sensitive to the IMF
      • Unlike Earth, there is no clear local time influence on the layer
    10. You have free access to this content
      Azimuthal auroral expansion associated with fast flows in the near-Earth plasma sheet: Coordinated observations of the THEMIS all-sky imagers and multiple spacecraft

      K. Ogasawara, Y. Kasaba, Y. Nishimura, T. Hori, T. Takada, Y. Miyashita, V. Angelopoulos, S. B. Mende and J. Bonnell

      Article first published online: 11 JUN 2011 | DOI: 10.1029/2010JA016032

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Azimuthal auroral expansion is closely associated with magnetic depolarization
      • The dipolarization region expands azimuthally in ExB drift speeds
      • The azimuthal speeds in the magnetosphere and ionosphere are comparable
    11. You have free access to this content
      Saturn's low-latitude boundary layer: 2. Electron structure

      A. Masters, A. P. Walsh, A. N. Fazakerley, A. J. Coates and M. K. Dougherty

      Article first published online: 11 JUN 2011 | DOI: 10.1029/2010JA016422

      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • The electron structure of Saturn's LLBL is variable
      • Some Saturn examples are unlike previously presented examples for Earth
      • The cause of these differences remains unclear
    12. You have free access to this content
      Outer radiation belt boundary location relative to the magnetopause: Implications for magnetopause shadowing

      C. Matsumura, Y. Miyoshi, K. Seki, S. Saito, V. Angelopoulos and J. Koller

      Article first published online: 18 JUN 2011 | DOI: 10.1029/2011JA016575

      • image
      • image
      • image
      • image

      Key Points

      • We investigated the outer edge of the outer belt using the THEMIS data
      • The outer edge position is correlated with the solar wind dynamic pressure
      • The results indicate that magnetopause shadowing is effective for the loss
    13. You have free access to this content
      AKR modulation and global Pi2 oscillation

      Teiji Uozumi, K. Yumoto, T. Tokunaga, S. I. Solovyev, B. M. Shevtsov, R. Marshall, K. Liou, S. Ohtani, S. Abe, A. Ikeda, K. Kitamura, A. Yoshikawa, H. Kawano and M. Itonaga

      Article first published online: 23 JUN 2011 | DOI: 10.1029/2010JA016042

      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • We found a temporal relationship between AKR and Pi2
      • The time derivative of the AKR modulation correlated to ground Pi2
      • The time derivative of the AKR modulation correlated to SCW oscillation
    14. You have free access to this content
      Displacement of conjugate points during a substorm in a global magnetohydrodynamic simulation

      S. Saita, A. Kadokura, N. Sato, S. Fujita, T. Tanaka, Y. Ebihara, S. Ohtani, G. Ueno, K. Murata, D. Matsuoka, A. Kitamoto and T. Higuchi

      Article first published online: 23 JUN 2011 | DOI: 10.1029/2010JA016155

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • We reproduced substorm-related changes in the magnetic field
      • We identify major factors controlling the displacement of conjugate points
      • We identify the factors that cause displacements of conjugate auroras
    15. You have free access to this content
      A statistical study of the inner edge of the electron plasma sheet and the net convection potential as a function of geomagnetic activity

      F. Jiang, M. G. Kivelson, R. J. Walker, K. K. Khurana, V. Angelopoulos and T. Hsu

      Article first published online: 25 JUN 2011 | DOI: 10.1029/2010JA016179

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Inner edge of the electron plasma sheet described by drift boundary model
      • Tail convection strength as a function of solar wind electric field
    16. You have free access to this content
      Entropy mapping of the outer electron radiation belt between the magnetotail and geosynchronous orbit

      Joseph E. Borovsky and Thomas E. Cayton

      Article first published online: 28 JUN 2011 | DOI: 10.1029/2011JA016470

      • image
      • image
      • image
      • image
      • image

      Key Points

      • The radiation belt and tail energetic electrons are the same population
      • There is a single-particle interpretation to the specific entropy
      • The specific entropy has relativistic corrections for a hot population
    17. You have free access to this content
      Simulations of observed auroral brightening caused by solar wind dynamic pressure enhancements under different interplanetary magnetic field conditions

      Z. Peng, C. Wang, Y. Q. Hu, J. R. Kan and Y. F. Yang

      Article first published online: 28 JUN 2011 | DOI: 10.1029/2010JA016318

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • We show that the auroral location depends on the IMF conditions
      • Our simulation results are consistent with these observations
      • Results suggest that the FACs play an important role in auroral brightening
    18. You have free access to this content
      Magnetic field depression at the Earth's surface during energetic neutral atom emission fade-out in the inner magnetosphere

      M. Nosé, S. Ohtani, P. C:son Brandt, T. Iyemori, K. Keika and D.-Y. Lee

      Article first published online: 29 JUN 2011 | DOI: 10.1029/2010JA015799

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • We examined the relation between the SYM-H index and the ring current energy
      • There were some events which contradicted the DPS equation
      • Such events can be explained by the generalized DPS equation
    19. You have free access to this content
      The transmission of upstream waves to the magnetosphere: An analysis at widely separated ground stations

      U. Villante, C. De Paulis and P. Francia

      Article first published online: 29 JUN 2011 | DOI: 10.1029/2010JA016263

      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • The ground wave activity is ubiquitously controlled by the upstream activity
      • At low latitudes the wave propagation is confined to the dayside hemisphere
      • In Antarctica the polarization suggests sunward propagation in the morning
    20. You have free access to this content
      Consequences of violation of frozen-in-flux: Evidence from OpenGGCM simulations

      B. Hu, R. A. Wolf, F. R. Toffoletto, J. Yang and J. Raeder

      Article first published online: 30 JUN 2011 | DOI: 10.1029/2011JA016667

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Violation of frozen-in-flux condition occurs before reconnection
      • The bubble/blob pair leads to a reduction of the normal magnetic field
    21. You have free access to this content
      Density cavity in magnetic reconnection diffusion region in the presence of guide field

      M. Zhou, Y. Pang, X. H. Deng, Z. G. Yuan and S. Y. Huang

      Article first published online: 30 JUN 2011 | DOI: 10.1029/2010JA016324

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Reveal the microphysics of density cavity in diffusion region with guide field
      • Study the wave-particle interaction that occurred inside the density cavity
      • Kinetic simulations reproduce most features of the observed depletion layer
    22. You have free access to this content
      Wave signatures and electrostatic phenomena above aurora: Cluster observations and modeling

      J. De Keyser, R. Maggiolo, M. Echim and I. Dandouras

      Article first published online: 30 JUN 2011 | DOI: 10.1029/2010JA016004

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • The wave and the electrostatic descriptions of aurora are complementary
      • One must account for interface motion in computing electric potential and FACs
      • Ionospheric ion outflow features parallel and perpendicular acceleration
    23. You have free access to this content
      Chorus-driven resonant scattering of diffuse auroral electrons in nondipolar magnetic fields

      Binbin Ni, Richard M. Thorne, Yuri Y. Shprits, Ksenia G. Orlova and Nigel P. Meredith

      Article first published online: 30 JUN 2011 | DOI: 10.1029/2011JA016453

      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Chorus-driven diffuse auroral scattering in nondipolar fields
      • Main cause for the significant differences in diffusion rates
      • Importance of using realistic magnetic fields to resonant scattering rates
  3. Solar and Heliospheric Physics

    1. Top of page
    2. Ionosphere and Upper Atmosphere
    3. Magnetospheric Physics
    4. Solar and Heliospheric Physics
    1. You have free access to this content
      Solar magnetic polarity dependency of geomagnetic storm seasonal occurrence

      S. Y. Oh and Y. Yi

      Article first published online: 17 JUN 2011 | DOI: 10.1029/2010JA016362

      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Semiannual geomagnetic activity (seasonal variation)
      • Test for the solar magnetic polarity dependence of geomagnetic activity
      • Statistical analysis on the geomagnetic storms defined by Dst
    2. You have free access to this content
      Kalman filter technique for defining solar regular geomagnetic variations: Comparison of analog and digital methods at Sodankylä Observatory

      D. Martini, M. Orispää, T. Ulich, M. Lehtinen, K. Mursula and D.-H. Lee

      Article first published online: 24 JUN 2011 | DOI: 10.1029/2010JA016343

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • We test the Kalman filter technique to define solar regular variation
      • Ak-type activity index based on Kalman method outperforms previous estimates
      • Kalman algorithm may be used to define a wide variety of activity indices
    3. You have free access to this content
      STEREO observations of the energetic ions in tilted corotating interaction regions

      R. Bučík, U. Mall, A. Korth and G. M. Mason

      Article first published online: 25 JUN 2011 | DOI: 10.1029/2010JA016311

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • High occurrence of the CIR events during periods of large warp in the HCS
      • Latitude separation between the two S/C controls the ion intensity differences
      • CIR ion intensity positively correlates with the HCS tilt angle
    4. You have free access to this content
      Multipoint observations of coronal mass ejection and solar energetic particle events on Mars and Earth during November 2001

      T. V. Falkenberg, S. Vennerstrom, D. A. Brain, G. Delory and A. Taktakishvili

      Article first published online: 28 JUN 2011 | DOI: 10.1029/2010JA016279

      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Multipoint observations are essential in order to investigate ICME propagation
      • Direction of the ICME is important to arrival time and signal amplitude
      • MGS MAG/ER measurements are useful to study ICMEs and SEPs
    5. You have free access to this content
      Voyagers 1 and 2 in a shrunken and squashed heliosphere

      W. R. Webber and D. S. Intriligator

      Article first published online: 29 JUN 2011 | DOI: 10.1029/2011JA016478

      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Heliosphere is shrunken/squashed from low solar wind pressure
      • Voyager 1 may be crossed by the heliopause within the next year
      • If not crossed by HP in the next year, it may not be until 2016

SEARCH

SEARCH BY CITATION