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Comparison of Accelerated Ion Populations Observed Upstream of the...

By: A. J. Coates; R. A. Frahm; E. Dubinin; M. Holmström; M. Fraenz; W. Baumjohann; M. Yamauchi; C. Mazelle; R. Lundin; J. D. Winningham; J.-a. Sauvaud; A. Fedorov; Y. Futaana; S. Barabash; T. L. Zhang

Description: Swedish Institute of Space Physics, Box 812, 98128 Kiruna, Sweden. Foreshock ions are compared between Venus and Mars at energies of 0.6~20 keV using the same ion instrument, the Ion Mass Analyser, on board both Venus Express and Mars Express. Venus Express often observes accelerated protons (2~6 times the solar wind energy) that travel away from the Venus bow shock when the spacecraft location is magnetically connected to the bow shock. The observed io...

Mazelle, C., Meziane, K., LeQu{é}au, D., Wilber, M., Eastwood, J. P., R{è}me, H., Sauvaud, J.-A., Bosqued,J. M., Dandouras, I., McCarthy, M., Kistler, L. M., Klecker, B., Korth, A., Bavassano-Cattaneo, M. B., Pallocchia, G., Lundin, R., and Balogh, A: Production of gyrating ions from nonlinear wave-particle interaction upstream from the Earth's bow shock: a case study from Cluster-CIS, Planet. Space Sci., 51, 785–795, 2003.; Mazelle, C., Winterhalter, D., Sauer, K., Trot...

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Spectral Properties of Electrostatic Drift Wave Turbulence in the ...

By: H. L. Pécseli

Description: University of Oslo, Department of Physics, P.O. Box 1048 Blindern, 0316 Oslo, Norway. Low-frequency electrostatic drift wave turbulence has been studied in both laboratory plasmas and in space. The present review describes a number of such laboratory experiments together with results obtained by instrumented spacecraft in the Earth's near and distant ionospheres. The summary emphasizes readily measurable quantities, such as the turbulent power spectra f...

Garcia, O. E., Leer, E., Pécseli, H. L., and Trulsen, J. K.: Magnetic field-aligned plasma currents in gravitational fields, Ann. Geophys., 33, 257-266, doi:10.5194/angeo-33-257-2015, 2015.; Golovchanskaya, I. V., Kozelov, B. V., and Despirak, I. V.: Investigation of the broadband ELF turbulence by observations of the FAST satellite, Geomagn. Aeronomy, 52, 474–481,

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Concerning the Occurrence Pattern of Flux Transfer Events on the D...

By: D. G. Sibeck

Description: Code 674, NASA/GSFC, 8800 Greenbelt Rd, Greenbelt, MD 20771, USA. We present an analytical model for the magnetic field perturbations associated with flux transfer events (FTEs) on the dayside magnetopause as a function of the shear between the magnetosheath and magnetospheric magnetic fields and the ratio of their strengths. We assume that the events are produced by component reconnection along subsolar reconnection lines with tilts that depend upon th...

Anderson, B. J., Phan, T.-D., and Fuselier, S. J.: Relationships between plasma depletion and subsolar reconnection, J. Geophys. Res., 102, 9531–9542, 1997.; Alexeev, I. I., Sibeck, D. G., and Bobrovnikov, S. Y.: Concerning the location of merging as a function of the magnetopause current strength, J. Geophys. Res., 103, 6675–6684, 1998.; Batchelor, G. K.: An Introduction to Fluid Dynamics, Cambridge Univ. Press, Cambridge, pp. 424–435, 1979.; Berchem, J. and Russell, C....

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Oxygen Ion Energization by Waves in the High Altitude Cusp and Man...

By: H. Nilsson; R. Slapak; M. André; G. Stenberg; M. Waara

Description: Swedish Institute of Space Physics, Kiruna, Sweden. We present a comparative study of low frequency electric field spectral densities and temperatures observed by the Cluster spacecraft in the high altitude cusp/mantle region. We compare the relation between the O+ temperature and wave intensity at the oxygen gyrofrequency at each measurement point and find a clear correlation. The trend of the correlation agrees with the predictions by both ...

Balogh, A., Carr, C. M., Acuña, M. H., Dunlop, M. W., Beek, T. J., Brown, P., Fornacon, K.-H., Georgescu, E., Glassmeier, K.-H., Harris, J., Musmann, G., Oddy, T., and Schwingenschuh, K.: The Cluster Magnetic Field Investigation: overview of in-flight performance and initial results, Ann. Geophys., 19, 1207–1217, doi:10.5194/angeo-19-1207-2001, 2001.; Bouhram, M., Malingre, M., Jasperse, J. R., Dubouloz, N., and Sa...

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The Relationship Between the Sahelian and Previous 2Nd Guinean Rai...

By: B. Fontaine; N. Philippon

Description: Centre de Recherches de Climatologie, UMR 5080 CNRS, Université de Bourgogne, 6 blvd. Gabriel, BP 138, 21000 Dijon, France. The correlation of 0.61 found between observed July–September Sahelian rainfall in year 0 and September–November Guinean rainfall in year - 1, led us to explore the statistical relationships between precipitation, soil moisture and near surface Moist Static Energy (MSE) gradients in West Africa. These analyses were performed o...

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Retrieval of Static Stability Parameter from the Radiosonde/Rawins...

By: Karanam Kishore Kumar; Prakash M. Dolas

Description: Space Physics Laboratory, Vikram sarabhai space center, Thiruvananthapuram-695022, India. In the present communication a novel method is presented to derive the altitude profile of Brunt-Väisälä period from the ascent rate profile of sounding balloons. The basic premise of the present method is that the oscillations in the ascent rate of the balloon will have the signature of Brunt-Väisälä frequency, which can be retrieved by using sophisticated spectra...

Chakrabarty, D. K., Shah, N. C., Pandya, K. V., and Peshin, S. K.: Long-term trend of tropopause over New Delhi and Thiruvananthapuram, Geophys. Res. Lett., 27, 2181–2184, 2000.; Daubechies, I.: Ten Lectures on Wavelets, Society for Industrial and Applied Mathematics, 357 pp, 1992.; De Mandel, R. E. and Krivo, S. J.: Radar/balloon measurement of vertical air motions between the surface and 15 km, J. Appl. Meteorol., 10, 313–319, 1971.; De Mandel, R. E. and Scoggins, J. R...

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Study of Tec, Slab-thickness and Neutral Temperature of the Thermo...

By: K. Niranjan; D. S. V. V. D. Prasad; K. Venkatesh; P. L. Saranya; P. V. S. Rama Rao

Description: Space Physics Laboratory, Department of Physics, Andhra University, Visakhapatnam, India. The ionospheric equivalent slab-thickness is an important parameter which measures the skewness of the electron density profile of the ionosphere. In this paper, the diurnal, seasonal, day-to-day and latitudinal variations of ionospheric parameters namely total electron content (TEC), the peak ionization density of F-layer (NmF2), equivalent slab-thickness (...

Aravindan, P. and Iyer, K. N.: Day to day variability in ionospheric electron content at low latitudes, Planet. Space Sci., 38, 743–750, 1990.; Bagiya, Mala S., Joshi, H. P., Iyer, K. N., Aggarwal, M., Ravindran, S., and Pathan, B. M.: TEC variations during low solar activity period (2005–2007) near the Equatorial Ionospheric Anomaly Crest region in India, Ann. Geophys., 27, 1047–1057, doi:10.5194/angeo-27-1047-2009

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Features of Energetic Particle Radial Profiles Inferred from Geosy...

By: E. Zesta; L. R. Lyons; Y. Shi

Description: Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, 405 Hilgard Ave, Los Angeles, CA 90095-1565, USA. Determination of the radial profile of phase space density of relativistic electrons at constant adiabatic invariants is crucial for identifying the source for them within the outer radiation belt. The commonly used method is to convert flux observed at fixed energy to phase space density at constant first, second and t...

Wang, C.-P., Lyons, L. R., Chen, M. W., and Wolf, R. A.: Modeling the quiet time inner plasma sheet protons, J. Geophys. Res., 106, 6161–6178, 2001.; Borodkova, N. L., Zastenker, G. N., Riazantseva, M., and Richardson, J. D.: Large and sharp solar wind dynamic pressure variations as a source of geomagnetic field disturbances at the geosynchronous orbit, Planet. Space Sci., 53, 25–32, 2005.; Chen, Y., Friedel, R. H. W., Reeves, G. D., Onsager, T. G., and Thomsen, M. F.: M...

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Letter to the Editor Energy Spectrum of Secondary Protons Above th...

By: M. Voronov; S. Mikhailov; G. De Pascale; A. Korotkov; G. Ricci; V. Boezio; Castellini; P. Morselli; O. De Marzo; M. Casolino; G. Vacchi; R. Picozza; A. Furano; A. Iannucci; S. Spillantini; A. Sparvoli; M. Koldashov; C. Circella; M. Cafagna; P. Adriani; A. Bonvicini; V. Bidoli; M. Zampa; M. Vannuccini; N. Zampa; P. Papini; A. Bakaldin; V. Leonov; F. Ambriola; S. Galper; E. Straulino

Description: University of Rome “Tor Vergata and INFN section of Roma2, Rome, Italy. In this paper we report on the energy spectrum of protons of albedo origin measured by the instruments NINA and NINA-2 at different geomagnetic locations, and the behaviour of the proton flux as a function of altitude out of the South Atlantic Anomaly. The instrument NINA was used on board the satellite Resurs-01-N4 between 1998 and 1999, at an altitude of about 830 km. The NIN...

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Radial Dependence of Foreshock Cavities: a Case Study : Volume 22,...

By: K. Kudela; T. Mukai; Z. Nemecek; D. G. Sibeck; J. Safrankova

Description: NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA. We present a case study of Geotail, Interball-1, IMP-8, and Wind observations of density and magnetic field strength cavities excavated by the enhanced pressures associated with bursts of energetic ions in the foreshock. Consistent with theoretical predictions, the pressure of the energetic ions diminishes rapidly with upstream distance due to a decrease in the flux of energetic ions and a tra...

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The Method of Determination of the Long-term Trends in the F2 Regi...

By: A. D. Danilov

Description: Institute of Applied Geophysics, Rostokinskays 9, Moscow 129 128, Russia. A detailed analysis of the f oF2 data at the Sverdlovsk station is performed to answer the question: whether the long-term trends of the F2-layer parameter detected recently are mainly due to the long-term changes in geomagnetic activity during the recent decades. Two methods to derive trends independent of geomagnetic activity are developed. It is found that both methods agr...

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Microphysical and Optical Properties of Precipitating Drizzle and ...

By: O. Jourdan; V. Shcherbakov; R. Neuber; I. S. Stachlewska; A. Schwarzenboeck; J.-f. Gayet

Description: LaMP UMR 6016 CNRS/Université Blaise Pascal, 24 avenue des Landais, 63177 Aubière, France. During the international ASTAR experiment (Arctic Study of Aerosols, Clouds and Radiation) carried out from Longyearbyen (Spitsbergen) from 10 May to 11 June 2004, the AWI (Alfred Wegener Institute) Polar 2 aircraft was equipped with a unique combination of remote and in situ instruments. The airborne AMALi lidar provided downward backscatter and Depolarisation ra...

Baumgardner, D. and Korolev, A.: Airspeed corrections for optical array probe sample volumes, J. Atmos. Ocean. Technol., 14, 1224–1229, 1997.; Ansmann, A., Wandinger, U., Riebesell, M., Weitkamp, C., and Michaelis, W.: Independent measurement of extinction and backscatter profiles in cirrus clouds by using combined Raman elastic-backscatter lidar, Appl. Opt., 31, 7113–7131, 1992.; Brogniez, G., Parol, F., Bécu, L., Pelon, J., Jourdan, O., Gayet, J.-F., Auriol, F., Verwae...

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Plasmoid Formation for Multiple Onset Substorms: Observations of t...

By: F. Takahashi; H. Shibuya; M. Matsushima; H. Tsunakawa; O. Amm; Y. Saito; T. Tanaka; H. Shimizu; M. N. Nishino; T. Nagai; K. Asamura; Y. Yokota

Description: Tokyo Institute of Technology, Tokyo, Japan. The Japanese Lunar Mission Kaguya carried out its first magnetic field and plasma measurements in the Earth's magnetotail on 22 December 2007. Fortuitously, three well-defined multiple onset substoms took place. Kaguya was located in the premidnight magnetotail at radial distances of 56 RE and observed plasmoids and/or traveling compression regions (TCRs). Although the present study is based...

Baker, D. N., Anderson, R. C., Zwickl, R. D., and Slavin, J. A.: Average plasma and magnetic field variations in the distant magnetotail associated with near-Earth substorm effects, J. Geophys. Res., 71–81, 1987.; Moldwin, M. B. and Hughes, W. J.: On the formation and evolution of plasmoids: A survey of ISEE 3 geotail data, J. Geophys. Res., 97, 19259–19282, 1992a.; Hones Jr., E. W., Baker, D. N., Bame, S. J., Feldman, W. C., Gosling, J. T., McComas, D. J., Zwickl, R. D....

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Parameters of Internal Gravity Waves in the Mesosphere-lower Therm...

By: D. M. Sosnovchik; Ch. Jacobi; A. N. Oleynikov

Description: 1Educational Res. Center of Radioengineering, Kharkiv National University of Radioengineering, 14, Lenin Av., 61166 Kharkiv, Ukraine. A procedure of revealing parameters of internal gravity waves from meteor radar wind measurements is presented. The method is based on dividing the measuring volume into different parts and, using wavelet analysis, calculating the phase progression of frequency peaks in the vertical and horizontal direction. Thus, the dist...

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Strong Kelvin Wave Activity Observed During the Westerly Phase of ...

By: U. Das; C. J. Pan

Description: Institute of Space Science, National Central University, Jhongli-32001, Taiwan. Temperature data from Global Positioning System based Radio Occultation (GPS RO) soundings of the Formosa Satellite mission 3/Constellation Observing System for Meteorology, Ionosphere and Climate (FORMOSAT-3/COSMIC or F-3/C) micro satellites have been investigated in detail to study the Kelvin wave (KW) properties during September 2008 to February 2009 using the two-dimensio...

Alexander, S. P., Tsuda, T., Kawatani, Y., and Takahashi, M.: Global distribution of atmospheric waves in the equatorial upper troposphere and lower stratosphere: COSMIC observations of wave mean flow interactions, J. Geophys. Res., 113, D24115, doi:10.1029/2008JD010039, 2008.; Baldwin, M. P., Gray, L. J., Dunkerton, T. J., Hamilton, K., Haynes, P. H., Randel, W. J., Holton, J. R., Alexander, M. J., Hirota, I., Horinouch...

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Electron Density Profiles in the Quiet Lower Ionosphere Based on t...

By: S. Kirkwood; P. Dalin; A. Osepian; V. Barabash

Description: Luleå University of Technology, Rymdcampus 1, 981 92 Kiruna, Sweden. The theoretical PGI (Polar Geophysical Institute) model for the quiet lower ionosphere has been applied for computing the ionization rate and electron density profiles in the summer and winter D-region at solar zenith angles less than 80° and larger than 99° under steady state conditions. In order to minimize possible errors in estimation of ionization rates provided by solar electroma...

Kull, A., Kopp, E., Granier, C., and Brasseur, G.: Ions and electrons of the lower-latitude D-region, J. Geophys. Res., 102, 9705–9716, 1997.; McKinnell, L. A. and Friedrich, M.: A neutral network based ionospheric model for the auroral zone, J. Atmos. Solar Terr. Phys., 69, 1459–1470, 2007.; Aikin, A. C., Goldberg, R. A., Jones. W., and Kane, J. A.: Observations of the mid-latitude lower ionosphere in winter, J. Geophys. Res., 82, 1869–1875, 1977.; Aikin, A. C., Chanin,...

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Topologically Driven Coronal Dynamics – a Mechanism for Coronal Ho...

By: S. K. Antiochos; D. A. N. Müller

Description: European Space Agency, Research and Scientific Support Department, c/o NASA Goddard Space Flight Center, Mail Code 671.1, Greenbelt, MD 20771, USA. Bald patches are magnetic topologies in which the magnetic field is concave up over part of a photospheric polarity inversion line. A bald patch topology is believed to be the essential ingredient for filament channels and is often found in extrapolations of the observed photospheric field. Using an analytic ...

Antiochos, S K.: Heating of the corona by magnetic singularities, Memorie della Societa Astronomica Italiana, 61, 369–382, 1990.; Antiochos, S K., DeVore, C R., Karpen, J T., and Mikić, Z.: Structure and Dynamics of the Sun's Open Magnetic Field, ApJ, 671, 936–946, 2007.; Aulanier, G., Démoulin, P., Schmieder, B., Fang, C., and Tang, Y H.: Magnetohydrostatic Model of a Bald-Patch Flare, Sol. Phys., 183, 369–388, 1998.; Bungey, T N., Titov, V S., and Priest, E R.: Basic t...

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Magnetic Clouds' Structure in the Magnetosheath as Observed by Clu...

By: E. K. J. Kilpua; D. Fontaine; P. Savoini; L. Turc

Description: Ecole Polytechnique, CNRS, Sorbonne Universités, UPMC Univ Paris 06, Univ Paris-Sud, UMR7648, Laboratoire de Physique des Plasmas, 91128 Palaiseau, France. Magnetic clouds (MCs) are large-scale magnetic flux ropes ejected from the Sun into the interplanetary space. They play a central role in solar–terrestrial relations as they can efficiently drive magnetic activity in the near-Earth environment. Their impact on the Earth's magnetosphere is often attrib...

Acuña, M. H., Ogilvie, K. W., Baker, D. N., Curtis, S. A., Fairfield, D. H., and Mish, W. H.: The Global Geospace Science Program and Its Investigations, Space Sci. Rev., 71, 5–21, doi:10.1007/BF00751323, 1995.; Angelopoulos, V.: The THEMIS Mission, Space Sci. Rev., 141, 5–34, doi:10.1007/s11214-008-9336-1, 2008; Balogh, A., Dunlop, M. W., Cowley, S. W. H., Southwood,...

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On Nonstationarity and Rippling of the Quasiperpendicular Zone of ...

By: K. Musatenko; V. V. Krasnoselskikh; T. Dudok De Wit; V. V. Lobzin

Description: LPCE/CNRS-Université d'Orléans, Orleans, France. A new method for remote sensing of the quasiperpendicular part of the bow shock surface is presented. The method is based on analysis of high frequency electric field fluctuations corresponding to Langmuir, upshifted, and downshifted oscillations in the electron foreshock. Langmuir waves usually have maximum intensity at the upstream boundary of this region. All these waves are generated by energetic elec...

Bagenal, F., Belcher, J. W., Sittler Jr., E. C., and Lepping, R. P.: The Uranian bow shock: Voyager 2 inbound observations of a high Mach number shock, J. Geophys. Res., 92, 8603–8612, 1987.; Barning, F. J. M.: The numerical analysis of the light-curve of 12 Lacertae, Bulletin of the Astronomical Institutes of the Netherlands, 17, 22–28, 1963.; Bale, S. D., Balikhin, M. A., Horbury, T. S., Krasnoselskikh, V. V., Kucharek, H.,~Möbius, E., Walker, S N., Balogh, A., Burgess...

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Combined Optical, Eiscat and Magnetic Observations of the Omega Ba...

By: S. Osipenko; A. Kozlovsky; H. Nilsson; S. Massetti; T. Sergienko; A. Kotikov; V. Safargaleev

Description: Polar Geophysical Institute, Apatity, 184200, Russia. We present here the results of multi-instrument observations of auroral torch and Ps6 magnetic pulsations, which are assumed to be the magnetic signature of the spatially periodic optical auroras known as omega bands. Data from TV and ASC cameras in Barentsburg and Ny Ålesund, EISCAT radars in Longyearbyen and Tromsø, as well as IMAGE network were used in this study. The auroral phenomenon which was ...

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