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  Subjects -> PHYSICS (Total: 796 journals)
    - ELECTRICITY AND MAGNETISM (9 journals)
    - MECHANICS (20 journals)
    - NUCLEAR PHYSICS (48 journals)
    - OPTICS (85 journals)
    - PHYSICS (580 journals)
    - SOUND (23 journals)
    - THERMODYNAMICS (31 journals)

PHYSICS (580 journals)                  1 2 3 | Last

Showing 1 - 200 of 741 Journals sorted alphabetically
Acta Acustica united with Acustica     Full-text available via subscription   (Followers: 5)
Acta Mechanica     Hybrid Journal   (Followers: 17)
Acta Scientifica Naturalis     Open Access  
Advanced Composite Materials     Hybrid Journal   (Followers: 59)
Advanced Functional Materials     Hybrid Journal   (Followers: 43)
Advanced Materials     Hybrid Journal   (Followers: 205)
Advanced Science Focus     Free   (Followers: 3)
Advanced Structural and Chemical Imaging     Open Access   (Followers: 2)
Advances in Condensed Matter Physics     Open Access   (Followers: 6)
Advances in Exploration Geophysics     Full-text available via subscription   (Followers: 2)
Advances in Geophysics     Full-text available via subscription   (Followers: 5)
Advances in High Energy Physics     Open Access   (Followers: 16)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 2)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 15)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 11)
Advances in OptoElectronics     Open Access   (Followers: 3)
Advances In Physics     Hybrid Journal   (Followers: 10)
Advances in Physics Theories and Applications     Open Access   (Followers: 11)
Advances in Remote Sensing     Open Access   (Followers: 29)
AIP Advances     Open Access   (Followers: 9)
AIP Conference Proceedings     Full-text available via subscription   (Followers: 3)
American Journal of Condensed Matter Physics     Open Access   (Followers: 3)
American Journal of Signal Processing     Open Access   (Followers: 8)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 2)
Annalen der Physik     Hybrid Journal   (Followers: 4)
Annales Geophysicae (ANGEO)     Open Access   (Followers: 15)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3)
Annales UMCS, Physica     Open Access  
Annals of Nuclear Medicine     Hybrid Journal   (Followers: 5)
Annals of Physics     Hybrid Journal   (Followers: 4)
Annals of West University of Timisoara - Physics     Open Access   (Followers: 1)
Annual Reports on NMR Spectroscopy     Full-text available via subscription   (Followers: 3)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 9)
Annual Review of Condensed Matter Physics     Full-text available via subscription   (Followers: 1)
Annual Review of Materials Research     Full-text available via subscription   (Followers: 5)
APL Materials     Open Access   (Followers: 10)
Applied Composite Materials     Hybrid Journal   (Followers: 42)
Applied Physics A     Hybrid Journal   (Followers: 7)
Applied Physics Frontier     Open Access   (Followers: 1)
Applied Physics Letters     Hybrid Journal   (Followers: 35)
Applied Physics Research     Open Access   (Followers: 4)
Applied Physics Reviews     Hybrid Journal   (Followers: 10)
Applied Radiation and Isotopes     Hybrid Journal   (Followers: 6)
Applied Remote Sensing Journal     Open Access   (Followers: 29)
Applied Spectroscopy     Full-text available via subscription   (Followers: 23)
Applied Spectroscopy Reviews     Hybrid Journal   (Followers: 5)
Archive for Rational Mechanics and Analysis     Hybrid Journal  
Asia Pacific Physics Newsletter     Hybrid Journal  
ASTRA Proceedings     Open Access  
Astronomy & Geophysics     Hybrid Journal   (Followers: 8)
Astronomy and Astrophysics Review     Hybrid Journal   (Followers: 5)
Astrophysical Journal Supplement Series     Full-text available via subscription   (Followers: 4)
Atoms     Open Access  
Attention, Perception & Psychophysics     Full-text available via subscription   (Followers: 7)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 7)
Axioms     Open Access  
Bangladesh Journal of Medical Physics     Open Access  
Bauphysik     Hybrid Journal   (Followers: 2)
Biomaterials     Hybrid Journal   (Followers: 42)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 16)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 25)
Biophysical Reviews     Hybrid Journal  
Biophysical Reviews and Letters     Hybrid Journal   (Followers: 2)
BMC Biophysics     Open Access   (Followers: 5)
Boson Journal of Modern Physics     Open Access  
Brazilian Journal of Physics     Hybrid Journal  
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 9)
Bulletin of Materials Science     Open Access   (Followers: 41)
Bulletin of the Atomic Scientists     Full-text available via subscription   (Followers: 3)
Bulletin of the Lebedev Physics Institute     Hybrid Journal   (Followers: 1)
Bulletin of the Russian Academy of Sciences: Physics     Hybrid Journal  
Caderno Brasileiro de Ensino de Física     Open Access  
Canadian Journal of Physics     Full-text available via subscription   (Followers: 1)
Case Studies in Nondestructive Testing and Evaluation     Open Access   (Followers: 6)
Cells     Open Access   (Followers: 1)
CERN courier. International journal of high energy physics     Free   (Followers: 6)
Chemical Physics of Solid Surfaces     Full-text available via subscription  
Chinese Journal of Astronomy and Astrophysics     Full-text available via subscription   (Followers: 3)
Chinese Journal of Chemical Physics     Hybrid Journal   (Followers: 1)
Chinese Journal of Physics     Hybrid Journal  
Chinese Physics B     Full-text available via subscription  
Chinese Physics C     Full-text available via subscription  
Chinese Physics Letters     Full-text available via subscription  
Cogent Physics     Open Access  
Cohesion and Structure     Full-text available via subscription   (Followers: 2)
Colloid Journal     Hybrid Journal   (Followers: 2)
Communications in Mathematical Physics     Hybrid Journal   (Followers: 1)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Communications in Theoretical Physics     Full-text available via subscription   (Followers: 2)
Complex Analysis and its Synergies     Open Access   (Followers: 1)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 156)
Composites Part B : Engineering     Hybrid Journal   (Followers: 197)
Computational Astrophysics and Cosmology     Open Access  
Computational Condensed Matter     Open Access  
Computational Materials Science     Hybrid Journal   (Followers: 20)
Computational Mathematics and Mathematical Physics     Hybrid Journal   (Followers: 1)
Computational Particle Mechanics     Hybrid Journal   (Followers: 1)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Physics Communications     Hybrid Journal   (Followers: 3)
Contemporary Concepts of Condensed Matter Science     Full-text available via subscription  
Contemporary Physics     Hybrid Journal   (Followers: 16)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 6)
Contributions to Plasma Physics     Hybrid Journal   (Followers: 3)
COSPAR Colloquia Series     Full-text available via subscription   (Followers: 5)
Cryogenics     Hybrid Journal   (Followers: 44)
Current Applied Physics     Full-text available via subscription   (Followers: 4)
Current Science     Open Access   (Followers: 35)
Diagnostic and Interventional Imaging     Full-text available via subscription  
Diamond and Related Materials     Hybrid Journal   (Followers: 12)
Doklady Physics     Hybrid Journal   (Followers: 1)
Dynamical Properties of Solids     Full-text available via subscription  
ECS Journal of Solid State Science and Technology     Full-text available via subscription   (Followers: 3)
EDUSAINS     Open Access  
Egyptian Journal of Remote Sensing and Space Science     Open Access   (Followers: 18)
EJNMMI Physics     Open Access  
Electrospinning     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 38)
Energy Procedia     Open Access   (Followers: 2)
Engineering Failure Analysis     Hybrid Journal   (Followers: 64)
Engineering Fracture Mechanics     Hybrid Journal   (Followers: 21)
Environmental Fluid Mechanics     Hybrid Journal   (Followers: 3)
EPJ Nonlinear Biomedical Physics     Open Access  
EPJ Quantum Technology     Open Access  
EPJ Techniques and Instrumentation     Full-text available via subscription  
EPJ Web of Conferences     Open Access  
European Journal of Physics     Full-text available via subscription   (Followers: 6)
European Journal of Physics Education     Open Access   (Followers: 3)
European Physical Journal - Applied Physics     Full-text available via subscription   (Followers: 7)
European Physical Journal C     Hybrid Journal   (Followers: 1)
Europhysics News     Open Access  
Experimental Mechanics     Hybrid Journal   (Followers: 21)
Experimental Methods in the Physical Sciences     Full-text available via subscription  
Experimental Techniques     Hybrid Journal   (Followers: 56)
Exploration Geophysics     Hybrid Journal   (Followers: 3)
Few-Body Systems     Hybrid Journal  
Fire and Materials     Hybrid Journal   (Followers: 5)
Flexible Services and Manufacturing Journal     Hybrid Journal   (Followers: 1)
Fluctuation and Noise Letters     Hybrid Journal   (Followers: 1)
Fluid Dynamics     Hybrid Journal   (Followers: 9)
Fortschritte der Physik/Progress of Physics     Hybrid Journal  
Frontiers in Physics     Open Access   (Followers: 6)
Frontiers of Materials Science     Hybrid Journal   (Followers: 3)
Frontiers of Physics     Hybrid Journal   (Followers: 2)
Fusion Engineering and Design     Hybrid Journal   (Followers: 9)
Geochemistry, Geophysics, Geosystems     Full-text available via subscription   (Followers: 25)
Geografiska Annaler, Series A: Physical Geography     Hybrid Journal   (Followers: 3)
Geophysical Research Letters     Full-text available via subscription   (Followers: 82)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 61)
Glass Physics and Chemistry     Hybrid Journal   (Followers: 3)
Global Journal of Physics     Open Access   (Followers: 1)
Granular Matter     Hybrid Journal   (Followers: 1)
Graphs and Combinatorics     Hybrid Journal   (Followers: 6)
Gravitation and Cosmology     Hybrid Journal   (Followers: 2)
Handbook of Geophysical Exploration: Seismic Exploration     Full-text available via subscription  
Handbook of Metal Physics     Full-text available via subscription  
Handbook of Surface Science     Full-text available via subscription   (Followers: 2)
Handbook of Thermal Analysis and Calorimetry     Full-text available via subscription  
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 3)
Heat Transfer - Asian Research     Hybrid Journal   (Followers: 9)
High Energy Density Physics     Hybrid Journal   (Followers: 2)
High Pressure Research: An International Journal     Hybrid Journal   (Followers: 4)
IEEE Journal of Quantum Electronics     Hybrid Journal   (Followers: 21)
IEEE Signal Processing Magazine     Full-text available via subscription   (Followers: 58)
IET Optoelectronics     Hybrid Journal   (Followers: 1)
Il Colle di Galileo     Open Access  
Imaging Science Journal     Hybrid Journal   (Followers: 2)
Indian Journal of Biochemistry and Biophysics (IJBB)     Open Access   (Followers: 3)
Indian Journal of Physics     Hybrid Journal   (Followers: 5)
Indian Journal of Pure & Applied Physics (IJPAP)     Open Access   (Followers: 14)
Indian Journal of Radio & Space Physics (IJRSP)     Open Access   (Followers: 16)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 25)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 5)
Infinite Dimensional Analysis, Quantum Probability and Related Topics     Hybrid Journal  
InfraMatics     Open Access  
Infrared Physics & Technology     Hybrid Journal  
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 8)
Intermetallics     Hybrid Journal   (Followers: 23)
International Applied Mechanics     Hybrid Journal   (Followers: 3)
International Geophysics     Full-text available via subscription   (Followers: 3)
International Heat Treatment and Surface Engineering     Hybrid Journal   (Followers: 3)
International Journal for Computational Methods in Engineering Science and Mechanics     Hybrid Journal   (Followers: 10)
International Journal for Ion Mobility Spectrometry     Hybrid Journal   (Followers: 1)
International Journal for Simulation and Multidisciplinary Design Optimization     Open Access   (Followers: 2)
International Journal of Abrasive Technology     Hybrid Journal   (Followers: 2)
International Journal of Aeroacoustics     Full-text available via subscription   (Followers: 27)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Astronomy and Astrophysics     Open Access   (Followers: 8)
International Journal of Computational Materials Science and Surface Engineering     Hybrid Journal   (Followers: 6)
International Journal of Damage Mechanics     Hybrid Journal   (Followers: 5)
International Journal of Fatigue     Hybrid Journal   (Followers: 35)
International Journal of Fracture     Hybrid Journal   (Followers: 11)
International Journal of Geometric Methods in Modern Physics     Hybrid Journal   (Followers: 1)
International Journal of Geophysics     Open Access   (Followers: 5)
International Journal of Heat and Fluid Flow     Hybrid Journal   (Followers: 31)
International Journal of Low Radiation     Hybrid Journal  
International Journal of Low-Carbon Technologies     Open Access   (Followers: 1)
International Journal of Mass Spectrometry     Hybrid Journal   (Followers: 16)
International Journal of Material Forming     Hybrid Journal  
International Journal of Materials and Product Technology     Hybrid Journal   (Followers: 4)
International Journal of Mechanical Sciences     Hybrid Journal   (Followers: 11)

        1 2 3 | Last

Journal Cover Annales Geophysicae (ANGEO)
  [SJR: 1.105]   [H-I: 73]   [15 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 0992-7689 - ISSN (Online) 1432-0576
   Published by European Geosciences Union Homepage  [8 journals]
  • Determination of errors in derived magnetic field directions
           in geosynchronous orbit: results from a statistical approach

    • Abstract: Determination of errors in derived magnetic field directions in geosynchronous orbit: results from a statistical approach
      Yue Chen, Gregory Cunningham, and Michael Henderson
      Ann. Geophys., 34, 831-843, doi:10.5194/angeo-34-831-2016, 2016
      This study statistically quantifies the errors in local magnetic field directions that are derived from electron directional distributions measured by Los Alamos National Laboratory geosynchronous (LANL GEO) satellites. We demonstrate for the first time that derived magnetic field directions in GEO orbit should statistically match the real magnetic directions ~2 times better than those from a list of empirical models and have no significant dependence on magnetospheric activities.
      PubDate: 2016-09-21T17:24:22+02:00
       
  • Numerical study of the generation and propagation of ultralow-frequency
           waves by artificial ionospheric F region modulation at different latitudes
           

    • Abstract: Numerical study of the generation and propagation of ultralow-frequency waves by artificial ionospheric F region modulation at different latitudes
      Xiang Xu, Chen Zhou, Run Shi, Binbin Ni, Zhengyu Zhao, and Yuannong Zhang
      Ann. Geophys., 34, 815-829, doi:10.5194/angeo-34-815-2016, 2016
      ULF waves can be generated by modulated HF heating in the ionospheric F region, which has long been considered for secure communication with submarines. In this paper we study the effects of background parameters on the process of ULF wave generation and propagation by using a numerical simulation. We find that wave radiation efficiency is higher in the daytime ionosphere at lower latitudes, while ground wave intensity is larger in the nighttime ionosphere with lower modulation frequency.
      PubDate: 2016-09-21T17:24:22+02:00
       
  • Ozone and temperature decadal responses to solar variability in
           the stratosphere and lower mesosphere, based on measurements from SABER
           on TIMED

    • Abstract: Ozone and temperature decadal responses to solar variability in the stratosphere and lower mesosphere, based on measurements from SABER on TIMED
      Frank T. Huang, Hans G. Mayr, James M. Russell III, and Martin G. Mlynczak
      Ann. Geophys., 34, 801-813, doi:10.5194/angeo-34-801-2016, 2016
      We have derived ozone and temperature responses to solar variability over a solar cycle, from 2002 to 2014 at 20–60 km and 48°S–48°N, based on a new dataset (SABER). These global results can be directly compared with 3-D models and will help in understanding not only the physical processes but also how they affect the Earth's climate. The simultaneous measurements of ozone and temperature will give added insight into the dynamics and photochemistry of the middle and upper atmosphere.
      PubDate: 2016-09-20T17:24:22+02:00
       
  • Optimization of GPS water vapor tomography technique with radiosonde
           and COSMIC historical data

    • Abstract: Optimization of GPS water vapor tomography technique with radiosonde and COSMIC historical data
      Shirong Ye, Pengfei Xia, and Changsheng Cai
      Ann. Geophys., 34, 789-799, doi:10.5194/angeo-34-789-2016, 2016
      The near-real-time high spatial resolution of atmospheric water vapor distribution is vital in numerical weather prediction. GPS tomography technique has been proved effectively for three-dimensional water vapor reconstruction. In this study, the tomography processing is optimized in a few aspects by the aid of radiosonde and COSMIC historical data, including the accuracy improvement of tropospheric zenith hydrostatic delay and precipitable water vapor conversion factor.
      PubDate: 2016-09-20T17:24:22+02:00
       
  • Atmospheric inertia-gravity waves retrieved from level-2 data of the
           satellite microwave limb sounder Aura/MLS

    • Abstract: Atmospheric inertia-gravity waves retrieved from level-2 data of the satellite microwave limb sounder Aura/MLS
      Klemens Hocke, Martin Lainer, Lorena Moreira, Jonas Hagen, Susana Fernandez Vidal, and Franziska Schranz
      Ann. Geophys., 34, 781-788, doi:10.5194/angeo-34-781-2016, 2016
      The dense horizontal sampling of atmospheric temperature profiles by the microwave limb sounder MLS on the NASA satellite AURA permit the estimation of global distributions of inertia-gravity waves (IGWs) in the middle atmosphere. We present and discuss the estimated global distributions of IGWs for July 2015 and January 2016. A dependence on the zonal wind distribution is obvious. The distributions of IGWs are a bit similar to the global distributions of small-scale gravity waves.
      PubDate: 2016-09-19T17:24:22+02:00
       
  • Simultaneous observations of structure function parameter of refractive
           index using a high-resolution radar and the DataHawk small airborne
           measurement system

    • Abstract: Simultaneous observations of structure function parameter of refractive index using a high-resolution radar and the DataHawk small airborne measurement system
      Danny E. Scipión, Dale A. Lawrence, Marco A. Milla, Ronald F. Woodman, Diego A. Lume, and Ben B. Balsley
      Ann. Geophys., 34, 767-780, doi:10.5194/angeo-34-767-2016, 2016
      The paper presents simultaneous observations made with a radar (SOUSY) and an unmanned aerial system (DataHawk) with the propose of studying the lower troposphere with high resolution. Through the comparison of both measurements, it was possible to compute the radar calibration constant, which will help to obtain calibrated measurements of turbulent parameters of the atmosphere.
      PubDate: 2016-09-16T12:28:35+02:00
       
  • On determining fluxgate magnetometer spin axis offsets from mirror mode
           observations

    • Abstract: On determining fluxgate magnetometer spin axis offsets from mirror mode observations
      Ferdinand Plaschke and Yasuhito Narita
      Ann. Geophys., 34, 759-766, doi:10.5194/angeo-34-759-2016, 2016
      Spacecraft-mounted magnetic field instruments (magnetometers) need to be routinely calibrated. This involves determining the magnetometer outputs in vanishing ambient magnetic fields, the so-called offsets. We introduce and test a new method to determine these offsets with high accuracy, the mirror mode method, which is complementary to existing methods. The mirror mode method should be highly beneficial to current and future magnetic field observations near Earth, other planets, and comets.
      PubDate: 2016-09-16T12:28:35+02:00
       
  • An evaluation of International Reference Ionosphere electron density in
           the polar cap and cusp using EISCAT Svalbard radar measurements

    • Abstract: An evaluation of International Reference Ionosphere electron density in the polar cap and cusp using EISCAT Svalbard radar measurements
      Lindis Merete Bjoland, Vasyl Belyey, Unni Pia Løvhaug, and Cesar La Hoz
      Ann. Geophys., 34, 751-758, doi:10.5194/angeo-34-751-2016, 2016
      ​The international reference ionosphere (IRI) model is a widely used model of the ionosphere. We compared this model with 16 years of radar measurements of electron density from Svalbard at altitudes between 200 and 500 km. Our results show that the model is biased towards an underestimation of the electron density in the high-latitude ionosphere and that this underestimation is most severe at nighttime. The model performs best at altitudes around the peak height of the electron density.​
      PubDate: 2016-09-13T12:28:35+02:00
       
  • Current sheet flapping in the near-Earth magnetotail: peculiarities of
           propagation and parallel currents

    • Abstract: Current sheet flapping in the near-Earth magnetotail: peculiarities of propagation and parallel currents
      Egor V. Yushkov, Anton V. Artemyev, Anatoly A. Petrukovich, and Rumi Nakamura
      Ann. Geophys., 34, 739-750, doi:10.5194/angeo-34-739-2016, 2016
      In the paper we study flapping wave structures, generated in the neutral plane of the Earth magnetotail. Investigated flapping is an important process of magnetosphere dynamics, connected with magnetic energy transformation and magnetic storm formation. Large separation of Cluster spacecraft allows us to estimate both local and global properties of flapping current sheets, the typical flapping times and propagation directions.
      PubDate: 2016-09-13T12:28:35+02:00
       
  • Anisotropic Jüttner (relativistic Boltzmann) distribution

    • Abstract: Anisotropic Jüttner (relativistic Boltzmann) distribution
      Rudolf A. Treumann and Wolfgang Baumjohann
      Ann. Geophys., 34, 737-738, doi:10.5194/angeo-34-737-2016, 2016
      The rigorous derivation of the Jüttner (covariant Boltzmann) distribution is provided for anisotropic pressure (or temperature) tensors. It was in similar form anticipated first by Gladd (1983). Its manifestly covariant version follows straightforwardly from its scalar property.
      PubDate: 2016-09-07T13:42:17+02:00
       
  • Effect of the solar activity variation on the Global Ionosphere
           Thermosphere Model (GITM)

    • Abstract: Effect of the solar activity variation on the Global Ionosphere Thermosphere Model (GITM)
      Davide Masutti, Günther March, Aaron J. Ridley, and Jan Thoemel
      Ann. Geophys., 34, 725-736, doi:10.5194/angeo-34-725-2016, 2016
      The Global Ionosphere Thermosphere Model has been validated against flight data. The validation shows a linear dependency of the neutral density values with respect to the solar activity. In particular, the thermosphere model shows an over-predicting or under-predicting behaviour under high or low solar activity respectively. The reasons for such behaviour can be attributed to an erroneous implementation of the chemical processes or the gas transport properties in the model.
      PubDate: 2016-09-01T22:19:54+02:00
       
  • A modeling study of asymmetries in plasma irregularity characteristics
           near gradient reversals

    • Abstract: A modeling study of asymmetries in plasma irregularity characteristics near gradient reversals
      Leslie J. Lamarche and Roman A. Makarevich
      Ann. Geophys., 34, 709-723, doi:10.5194/angeo-34-709-2016, 2016
      The asymmetries between the leading and trailing edges of large-scale plasma density structures in the ionosphere are examined using a general formalism for the gradient-drift instability for arbitrary altitude and propagation direction. The asymmetry changes dramatically with propagation direction and is most likely to be observed by a ground-based radar when the radar’s boresight is parallel to the structure’s elongation direction and perpendicular to its direction of motion.
      PubDate: 2016-08-31T22:19:54+02:00
       
  • Modified ion-Weibel instability as a possible source of wave activity at
           Comet 67P/Churyumov-Gerasimenko

    • Abstract: Modified ion-Weibel instability as a possible source of wave activity at Comet 67P/Churyumov-Gerasimenko
      Patrick Meier, Karl-Heinz Glassmeier, and Uwe Motschmann
      Ann. Geophys., 34, 691-707, doi:10.5194/angeo-34-691-2016, 2016
      A new type of wave has been detected by the magnetometer of the Rosetta spacecraft close to comet P67/Churyumov-Gerasimenko. We provide the analytical model of this wave excitation from linear perturbation theory. A modified ion-Weibel instability is identified as source of this wave excited by a cometary current. The waves predominantly grow perpendicular to this current. A fan-like phase structure results from superposing the strongest growing waves in a cometary rest frame.
      PubDate: 2016-08-31T22:19:54+02:00
       
  • Inverse scattering problem in turbulent magnetic fluctuations

    • Abstract: Inverse scattering problem in turbulent magnetic fluctuations
      Rudolf A. Treumann, Wolfgang Baumjohann, and Yasuhito Narita
      Ann. Geophys., 34, 673-689, doi:10.5194/angeo-34-673-2016, 2016
      In support of low-frequency electromagnetic turbulence we formulate the inverse scattering theory of electromagnetic fluctuations in plasma. Its solution provides the turbulent response function which contains all information of the dynamical causes of the electromagnetic fluctuations. This is of basic interest in any electromagnetic turbulence. It requires measurement of magnetic and electric fluctuations but makes no direct use of the turbulent power spectral density.
      PubDate: 2016-08-16T10:58:19+02:00
       
  • Quantitative assessment of AOD from 17 CMIP5 models based on
           satellite-derived AOD over India

    • Abstract: Quantitative assessment of AOD from 17 CMIP5 models based on satellite-derived AOD over India
      Amit Misra, Vijay P. Kanawade, and Sachchida Nand Tripathi
      Ann. Geophys., 34, 657-671, doi:10.5194/angeo-34-657-2016, 2016
      For an accurate understanding of earth climate system, it is necessary to evaluate the performance of the climate models used to perform these simulations. In this work we have examined aerosol optical depths simulated by 17 models by comparing them with satellite-derived aerosol optical depth. Our results indicate the role of dust aerosols and biogeochemistry in the simulation of aerosols by models.
      PubDate: 2016-08-03T14:02:19+02:00
       
  • Optimization of Saturn paraboloid magnetospheric field model
           parameters using Cassini equatorial magnetic field data

    • Abstract: Optimization of Saturn paraboloid magnetospheric field model parameters using Cassini equatorial magnetic field data
      Elena S. Belenkaya, Vladimir V. Kalegaev, Stanley W. H. Cowley, Gabrielle Provan, Marina S. Blokhina, Oleg G. Barinov, Alexander A. Kirillov, and Maria S. Grigoryan
      Ann. Geophys., 34, 641-656, doi:10.5194/angeo-34-641-2016, 2016
      The paraboloid model of Saturn’s magnetosphere describes the magnetic field of the planet, the ring current, magnetopause current, and the tail current. The model parameters are determined by comparison with the Cassini magnetic field data from 18 near-equatorial passes that span wide ranges of LT. The best-fit model parameters are employed to determine how the parameters vary with the subsolar distance of the magnetopause, governed by pressure balance at the magnetospheric boundary.
      PubDate: 2016-07-26T09:10:22+02:00
       
  • Multi-year GNSS monitoring of atmospheric IWV over Central and South
           America for climate studies

    • Abstract: Multi-year GNSS monitoring of atmospheric IWV over Central and South America for climate studies
      Clara Eugenia Bianchi, Luciano Pedro Oscar Mendoza, Laura Isabel Fernández, María Paula Natali, Amalia Margarita Meza, and Juan Francisco Moirano
      Ann. Geophys., 34, 623-639, doi:10.5194/angeo-34-623-2016, 2016
      Long-term monitoring of the amount of water vapour in the lower atmosphere is essential for climate studies. We analysed satellite observations, at hundreds of locations in Central and South America, to look for changes in this parameter over several years. We found evidence of drying of the troposphere in temperate regions, and also evidence of slow moistening over the tropics. Moreover, we openly provide the complete data collection to the scientific community.
      PubDate: 2016-07-20T09:10:22+02:00
       
  • Two-point observations of low-frequency waves at 67P/Churyumov-Gerasimenko
           during the descent of PHILAE: comparison of RPCMAG and ROMAP

    • Abstract: Two-point observations of low-frequency waves at 67P/Churyumov-Gerasimenko during the descent of PHILAE: comparison of RPCMAG and ROMAP
      Ingo Richter, Hans-Ulrich Auster, Gerhard Berghofer, Chris Carr, Emanuele Cupido, Karl-Heinz Fornaçon, Charlotte Goetz, Philip Heinisch, Christoph Koenders, Bernd Stoll, Bruce T. Tsurutani, Claire Vallat, Martin Volwerk, and Karl-Heinz Glassmeier
      Ann. Geophys., 34, 609-622, doi:10.5194/angeo-34-609-2016, 2016
      We have analysed the magnetic field measurements performed on the ROSETTA orbiter and the lander PHILAE during PHILAE's descent to comet 67P/Churyumov-Gerasimenko on 12 November 2014. We observed a new type of low-frequency wave with amplitudes of ~ 3 nT, frequencies of 20–50 mHz, wavelengths of ~ 300 km, and propagation velocities of ~ 6 km s−1. The waves are generated in a ~ 100 km region around the comet a show a highly correlated behaviour, which could only be determined by two-point observations.
      PubDate: 2016-07-14T16:50:53+02:00
       
  • Solar energetic particle interactions with the Venusian atmosphere

    • Abstract: Solar energetic particle interactions with the Venusian atmosphere
      Christina Plainaki, Pavlos Paschalis, Davide Grassi, Helen Mavromichalaki, and Maria Andriopoulou
      Ann. Geophys., 34, 595-608, doi:10.5194/angeo-34-595-2016, 2016
      In the context of planetary space weather, we estimate the ion production rates in the Venusian atmosphere due to the interactions of solar energetic particles (SEPs) with gas. The assumed concept for our estimations is based on two cases of SEP events, previously observed in near-Earth space: the event in October 1989 and the event in May 2012. For both cases, we assume that the directional properties of the flux and the interplanetary magnetic field configuration would have allowed the SEPs' arrival at Venus and their penetration to the planet's atmosphere. For the event in May 2012, we consider the solar particle properties (integrated flux and rigidity spectrum) obtained by the Neutron Monitor Based Anisotropic GLE Pure Power Law (NMBANGLE PPOLA) model (Plainaki et al., 2010, 2014) applied previously for the Earth case and scaled to the distance of Venus from the Sun. For the simulation of the actual cascade in the Venusian atmosphere initiated by the incoming particle fluxes, we apply the DYASTIMA code, a Monte Carlo (MC) application based on the Geant4 software (Paschalis et al., 2014). Our predictions are afterwards compared to other estimations derived from previous studies and discussed. Finally, we discuss the differences between the nominal ionization profile due to galactic cosmic-ray–atmosphere interactions and the profile during periods of intense solar activity, and we show the importance of understanding space weather conditions on Venus in the context of future mission preparation and data interpretation.
      PubDate: 2016-07-14T16:50:53+02:00
       
  • Daytime twin-peak structures observed at southern African and European
           middle latitudes on 8–13 April 2012

    • Abstract: Daytime twin-peak structures observed at southern African and European middle latitudes on 8–13 April 2012
      Zama T. Katamzi, John Bosco Habarulema, and Nigussie M. Giday
      Ann. Geophys., 34, 581-590, doi:10.5194/angeo-34-581-2016, 2016
      Daytime twin-peak structures, also known as bite-out or diurnal double-maxima structures, are ionospheric phenomena in which the diurnal ionospheric trend shows two peaks (instead of the normal one) during the daytime. This study reports on first simultaneous observations of these structures in the Global Positioning System and ionosonde measurements from the southern African and European middle-latitude stations during a mostly quiet geomagnetic condition period of 8–13 April 2012.
      PubDate: 2016-07-12T15:00:39+02:00
       
 
 
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