for Journals by Title or ISSN
for Articles by Keywords
help
  Subjects -> PHYSICS (Total: 801 journals)
    - ELECTRICITY AND MAGNETISM (9 journals)
    - MECHANICS (19 journals)
    - NUCLEAR PHYSICS (49 journals)
    - OPTICS (85 journals)
    - PHYSICS (583 journals)
    - SOUND (24 journals)
    - THERMODYNAMICS (32 journals)

PHYSICS (583 journals)                  1 2 3 | Last

Showing 1 - 200 of 741 Journals sorted alphabetically
Acta Acustica united with Acustica     Full-text available via subscription   (Followers: 6)
Acta Mechanica     Hybrid Journal   (Followers: 18)
Acta Scientifica Naturalis     Open Access   (Followers: 1)
Advanced Composite Materials     Hybrid Journal   (Followers: 60)
Advanced Functional Materials     Hybrid Journal   (Followers: 45)
Advanced Materials     Hybrid Journal   (Followers: 227)
Advanced Science Focus     Free   (Followers: 3)
Advanced Structural and Chemical Imaging     Open Access   (Followers: 2)
Advances in Condensed Matter Physics     Open Access   (Followers: 8)
Advances in Exploration Geophysics     Full-text available via subscription   (Followers: 3)
Advances in Geophysics     Full-text available via subscription   (Followers: 6)
Advances in High Energy Physics     Open Access   (Followers: 21)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 2)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 16)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 28)
Advances in OptoElectronics     Open Access   (Followers: 5)
Advances In Physics     Hybrid Journal   (Followers: 18)
Advances in Physics : X     Open Access  
Advances in Physics Theories and Applications     Open Access   (Followers: 13)
Advances in Remote Sensing     Open Access   (Followers: 34)
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: 4)
American Journal of Signal Processing     Open Access   (Followers: 10)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 4)
Annalen der Physik     Hybrid Journal   (Followers: 5)
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  
Annual Review of Materials Research     Full-text available via subscription   (Followers: 5)
APL Materials     Open Access   (Followers: 10)
Applied Composite Materials     Hybrid Journal   (Followers: 44)
Applied Physics A     Hybrid Journal   (Followers: 8)
Applied Physics Frontier     Open Access   (Followers: 1)
Applied Physics Letters     Hybrid Journal   (Followers: 33)
Applied Physics Research     Open Access   (Followers: 4)
Applied Physics Reviews     Hybrid Journal   (Followers: 9)
Applied Radiation and Isotopes     Hybrid Journal   (Followers: 6)
Applied Remote Sensing Journal     Open Access   (Followers: 33)
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   (Followers: 1)
Astronomy & Geophysics     Hybrid Journal   (Followers: 46)
Astronomy and Astrophysics Review     Hybrid Journal   (Followers: 21)
Astrophysical Journal Supplement Series     Full-text available via subscription   (Followers: 7)
Atoms     Open Access   (Followers: 1)
Attention, Perception & Psychophysics     Full-text available via subscription   (Followers: 10)
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)
Berkala Fisika Indonesia     Open Access  
Biomaterials     Hybrid Journal   (Followers: 45)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 16)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 30)
Biophysical Reviews     Hybrid Journal  
Biophysical Reviews and Letters     Hybrid Journal   (Followers: 3)
BMC Biophysics     Open Access   (Followers: 5)
Boson Journal of Modern Physics     Open Access   (Followers: 12)
Brazilian Journal of Physics     Hybrid Journal  
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
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: 14)
Case Studies in Nondestructive Testing and Evaluation     Open Access   (Followers: 8)
Cells     Open Access   (Followers: 2)
CERN courier. International journal of high energy physics     Free   (Followers: 7)
Chemical Physics of Solid Surfaces     Full-text available via subscription  
Chinese Journal of Astronomy and Astrophysics     Full-text available via subscription   (Followers: 13)
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: 2)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 167)
Composites Part B : Engineering     Hybrid Journal   (Followers: 212)
Computational Astrophysics and Cosmology     Open Access  
Computational Condensed Matter     Open Access  
Computational Materials Science     Hybrid Journal   (Followers: 21)
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: 6)
Contemporary Concepts of Condensed Matter Science     Full-text available via subscription  
Contemporary Physics     Hybrid Journal   (Followers: 27)
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: 7)
Cryogenics     Hybrid Journal   (Followers: 45)
Current Applied Physics     Full-text available via subscription   (Followers: 4)
Current Science     Open Access   (Followers: 46)
Diagnostic and Interventional Imaging     Full-text available via subscription  
Diamond and Related Materials     Hybrid Journal   (Followers: 11)
Doklady Physics     Hybrid Journal   (Followers: 1)
Dynamical Properties of Solids     Full-text available via subscription  
ECS Journal of Solid State Science and Technology     Hybrid Journal   (Followers: 3)
EDUSAINS     Open Access  
Egyptian Journal of Remote Sensing and Space Science     Open Access   (Followers: 20)
EJNMMI Physics     Open Access  
Electrospinning     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 40)
Energy Procedia     Open Access   (Followers: 2)
Engineering Failure Analysis     Hybrid Journal   (Followers: 64)
Engineering Fracture Mechanics     Hybrid Journal   (Followers: 22)
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: 19)
European Journal of Physics Education     Open Access   (Followers: 3)
European Physical Journal - Applied Physics     Full-text available via subscription   (Followers: 16)
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: 4)
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: 11)
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: 10)
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: 100)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 124)
Glass Physics and Chemistry     Hybrid Journal   (Followers: 4)
Global Journal of Physics     Open Access   (Followers: 2)
Granular Matter     Hybrid Journal   (Followers: 1)
Graphs and Combinatorics     Hybrid Journal   (Followers: 6)
Gravitation and Cosmology     Hybrid Journal   (Followers: 3)
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: 3)
Handbook of Thermal Analysis and Calorimetry     Full-text available via subscription   (Followers: 1)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 3)
Heat Transfer - Asian Research     Hybrid Journal   (Followers: 10)
High Energy Density Physics     Hybrid Journal   (Followers: 2)
High Pressure Research: An International Journal     Hybrid Journal   (Followers: 3)
IEEE Journal of Quantum Electronics     Hybrid Journal   (Followers: 20)
IEEE Signal Processing Magazine     Full-text available via subscription   (Followers: 62)
IET Optoelectronics     Hybrid Journal   (Followers: 1)
Il Colle di Galileo     Open Access  
Image Analysis & Stereology     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: 20)
Indian Journal of Pure & Applied Physics (IJPAP)     Open Access   (Followers: 38)
Indian Journal of Radio & Space Physics (IJRSP)     Open Access   (Followers: 35)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 29)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 7)
Infinite Dimensional Analysis, Quantum Probability and Related Topics     Hybrid Journal  
InfraMatics     Open Access  
Infrared Physics & Technology     Hybrid Journal   (Followers: 10)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 8)
Intermetallics     Hybrid Journal   (Followers: 22)
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: 3)
International Journal of Abrasive Technology     Hybrid Journal   (Followers: 2)
International Journal of Aeroacoustics     Hybrid Journal   (Followers: 29)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Astronomy and Astrophysics     Open Access   (Followers: 22)
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: 32)
International Journal of Fracture     Hybrid Journal   (Followers: 11)
International Journal of Geometric Methods in Modern Physics     Hybrid Journal   (Followers: 2)
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: 17)

        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]
  • A statistical study of the motion of pulsating aurora patches: using the
           THEMIS All-Sky Imager

    • Abstract: A statistical study of the motion of pulsating aurora patches: using the THEMIS All-Sky Imager
      Bing Yang, Eric Donovan, Jun Liang, and Emma Spanswick
      Ann. Geophys., 35, 217-225, doi:10.5194/angeo-35-217-2017, 2017
      This is the first statistical study of the motion of patchy pulsating aurora (PPA). Our results show that PPA patches mainly drift eastward after midnight and westward before midnight, which suggests that the drifts of auroral patches could be a proxy for the ionospheric convection and provide a convenient and accurate method to remotely sense the magnetospheric convection. We also found that patch velocities do not seem to depend on AE index.
      PubDate: 2017-02-08T09:53:27+01:00
       
  • Three-dimensional data assimilation for ionospheric reference scenarios

    • Abstract: Three-dimensional data assimilation for ionospheric reference scenarios
      Tatjana Gerzen, Volker Wilken, David Minkwitz, Mainul M. Hoque, and Stefan Schlüter
      Ann. Geophys., 35, 203-215, doi:10.5194/angeo-35-203-2017, 2017
      The reliable estimation of ionospheric refraction effects is an importanttopic in the GNSS (Global Navigation Satellite Systems) positioning andnavigation domain, especially in safety-of-life applications. This paperdescribes a three-dimensional ionosphere reconstruction approach that combines three datasources with an ionospheric background model: space- and ground-based total electron content(TEC)measurements and ionosonde observations. First the background model isadjusted by F2 layer characteristics, obtained from space-based ionosphericradio occultation (IRO) profiles and ionosonde data, and secondly the finalelectron density distribution is estimated by an algebraic reconstructiontechnique.
      The method described is validated by TECmeasurements of independent ground-based GNSS stations, space-based TEC fromthe Jason 1 and 2 satellites, and ionosonde observations. A significantimprovement is achieved by the data assimilation, with a decrease in theresidual errors by up to 98 % compared to the initial guess of thebackground. Furthermore, the results underpin the capability of space-basedmeasurements to overcome data gaps in reconstruction areas where less GNSSground-station infrastructure exists.
      PubDate: 2017-02-06T10:49:52+01:00
       
  • A high-altitude balloon experiment to probe stratospheric electric fields
           from low latitudes

    • Abstract: A high-altitude balloon experiment to probe stratospheric electric fields from low latitudes
      Subramanian Gurubaran, Manu Shanmugam, Kaliappan Jawahar, Kaliappan Emperumal, Prasanna Mahavarkar, and Suneel Kumar Buduru
      Ann. Geophys., 35, 189-201, doi:10.5194/angeo-35-189-2017, 2017
      Results from a high-altitude balloon experiment conducted from a low-latitude station in India are presented in this work. The objectives of this experiment were to probe and understand the processes driving the various electric field sources at low latitudes. During this experiment, electric fields in the range of 5–6 mV m−1 were observed at the balloon float altitude of 35 km. Atmospheric waves of few 100 km horizontal wavelength are suggested to be a potential source of these electric fields.
      PubDate: 2017-02-03T10:49:52+01:00
       
  • Large-scale gravity wave perturbations in the mesopause region above
           Northern Hemisphere midlatitudes during autumnal equinox: a joint study by
           the USU Na lidar and Whole Atmosphere Community Climate Model

    • Abstract: Large-scale gravity wave perturbations in the mesopause region above Northern Hemisphere midlatitudes during autumnal equinox: a joint study by the USU Na lidar and Whole Atmosphere Community Climate Model
      Xuguang Cai, Tao Yuan, and Han-Li Liu
      Ann. Geophys., 35, 181-188, doi:10.5194/angeo-35-181-2017, 2017
      Atmospheric gravity waves play highly important roles in the dynamic and chemical processes in the upper atmosphere. To assess their magnitude, continuous full diurnal cycle measurements of temperature perturbations are necessary. In this paper we have calculated the large-scale gravity wave modulations between 85 and 99 km altitude based on the measurements by a unique Na lidar at Utah State University in the month of September from 2011 to 2015. The waves with period of 3–5 h dominate.
      PubDate: 2017-02-02T10:49:52+01:00
       
  • The response of the H geocorona between 3 and 8 Re to geomagnetic
           disturbances studied using TWINS stereo Lyman-α data

    • Abstract: The response of the H geocorona between 3 and 8 Re to geomagnetic disturbances studied using TWINS stereo Lyman-α data
      Jochen H. Zoennchen, Uwe Nass, Hans J. Fahr, and Jerry Goldstein
      Ann. Geophys., 35, 171-179, doi:10.5194/angeo-35-171-2017, 2017
      Circumterrestrial Lyman-α column brightness observations from3–8 Earth radii (Re) have been used to study temporal densityvariations in the exospheric neutral hydrogen as response to geomagneticdisturbances of different strength, i.e., Dst peak values between −26 and−147 nT. The data used were measured by the two Lyman-α detectors(LAD1/2) onboard both TWINS satellites between the solar minimum of 2008 andnear the solar maximum of 2013. The solar Lyman-α flux at 121.6 nm isresonantly scattered near line center by exospheric H atoms and measured bythe TWINS LADs. Along a line of sight (LOS), the scattered LOS-columnintensity is proportional to the LOS H column density, assuming opticallythin conditions above 3 Re. In the case of the eight analyzedgeomagnetic storms we found a significant increase in the exosphericLyman-α flux between 9 and 23 % (equal to the same increase inH column density ΔnH) compared to the undisturbed case shortbefore the storm event. Even weak geomagnetic storms (e.g., Dst peak values ≥  −41 nT) under solar minimum conditions show increases up to23 % of the exospheric H densities. The strong H density increase in theobserved outer exosphere is also a sign of an enhanced H escape flux duringstorms. For the majority of the storms we found an average time shift of about11 h between the time when the first significant dynamic solar windpressure peak (pSW) hits the Earth and the time when theexospheric Lyman-α flux variation reaches its maximum. The resultsshow that the (relative) exospheric density reaction of ΔnHhave a tendency to decrease with increasing peak values of Dst index or theKp index daily sum. Nevertheless, a simple linear correlation between ΔnH and these two geomagnetic indices does not seem to exist. Incontrast, when recovering from the peak back to the undisturbed case,the Kp index daily sum and the ΔnH essentially showthe same temporal recovery.
      PubDate: 2017-02-01T10:49:52+01:00
       
  • Understanding the variability of magnetic storms caused by ICMEs

    • Abstract: Understanding the variability of magnetic storms caused by ICMEs
      Remi Benacquista, Sandrine Rochel, and Guy Rolland
      Ann. Geophys., 35, 147-159, doi:10.5194/angeo-35-147-2017, 2017
      The Earth's magnetic field creates a magnetic bulk all around it called the magnetosphere. This bulk a priori protects us from the particles coming from the sun but sometimes undergoes violent events such as interplanetary coronal mass ejections. These cause the entry of particles into the magnetosphere, which can be harmful for satellites. In this paper, we performed a statistical study to characterize the interplanetary coronal mass ejections and their ability to disturb the magnetosphere.
      PubDate: 2017-01-30T07:15:26+01:00
       
  • Climatology of thermospheric neutral winds over Oukaïmeden
           Observatory in Morocco

    • Abstract: Climatology of thermospheric neutral winds over Oukaïmeden Observatory in Morocco
      Mohamed Kaab, Zouhair Benkhaldoun, Daniel J. Fisher, Brian Harding, Aziza Bounhir, Jonathan J. Makela, Amine Laghriyeb, Khalifa Malki, Ahmed Daassou, and Mohamed Lazrek
      Ann. Geophys., 35, 161-170, doi:10.5194/angeo-35-161-2017, 2017
      we present the first multi-year results of the climatology of horizontal winds obtained during a period of 26 months. We compare the observed climatologies of neutral winds to that provided by the recently updated Horizontal Wind Model (HWM14) in order to validate that model's predictions of the thermospheric wind patterns over the eastern portion of Africa. HWM14 generally compares well with the horizontal winds, but significant magnitude and phase differences remain in certain seasons.
      PubDate: 2017-01-30T07:15:26+01:00
       
  • Pancake-like and tablet-like distribution functions of energetic electrons
           in the middle magnetosphere

    • Abstract: Pancake-like and tablet-like distribution functions of energetic electrons in the middle magnetosphere
      Peter Bespalov and Olga Savina
      Ann. Geophys., 35, 133-138, doi:10.5194/angeo-35-133-2017, 2017
      We propose a simple explanation of the prolonged existence of pancake-like electron velocity distributions in the radiation belts. The pancake-like distribution function is characterized by a longitudinal particle velocity (along the magnetic field) of the order of the thermal velocity of the background plasma. The parameters of the tablet-like distribution function are refined. The stability of these distributions is examined.
      PubDate: 2017-01-24T07:15:26+01:00
       
  • A study of geomagnetic field variations along the 80° S
           geomagnetic parallel

    • Abstract: A study of geomagnetic field variations along the 80° S geomagnetic parallel
      Stefania Lepidi, Lili Cafarella, Patrizia Francia, Andrea Piancatelli, Manuela Pietrolungo, Lucia Santarelli, and Stefano Urbini
      Ann. Geophys., 35, 139-146, doi:10.5194/angeo-35-139-2017, 2017
      We study geomagnetic field variations from 1 min data at three Antarctic sites (Mario Zucchelli Station, Scott Base, Talos Dome) along the 80° S geomagnetic parallel. The daily variation depends on local time, due to the polar extension of midlatitude ionospheric currents. The ~1–7 mHz power maximizes around 12 MLT, close to the cusp, and the coherence does so between stations around 24 MLT. The wave propagation is consistent with a daytime solar wind source and with nighttime substorm processes.
      PubDate: 2017-01-24T07:15:26+01:00
       
  • Observations of equatorial ionization anomaly over Africa and Middle East
           during a year of deep minimum

    • Abstract: Observations of equatorial ionization anomaly over Africa and Middle East during a year of deep minimum
      Olawale Bolaji, Oluwafisayo Owolabi, Elijah Falayi, Emmanuel Jimoh, Afolabi Kotoye, Olumide Odeyemi, Babatunde Rabiu, Patricia Doherty, Endawoke Yizengaw, Yosuke Yamazaki, Jacob Adeniyi, Rafiat Kaka, and Kehinde Onanuga
      Ann. Geophys., 35, 123-132, doi:10.5194/angeo-35-123-2017, 2017
      Movement of plasma to higher latitudes by EIA is known to relate to eastward electric field/EEJ and thermospheric meridional neutral wind. Experiments from GPS measurements that unveil thermospheric meridional neutral wind effect on plasma transportation in the F region are very few compared with electric field/EEJ. This work includes examples of thermospheric meridional neutral wind effects on GPS TEC measurements and their roles in transportation of plasma compared to electric field/EEJ.
      PubDate: 2017-01-20T14:04:23+01:00
       
  • Spin axis offset calibration on THEMIS using mirror modes

    • Abstract: Spin axis offset calibration on THEMIS using mirror modes
      Dennis Frühauff, Ferdinand Plaschke, and Karl-Heinz Glassmeier
      Ann. Geophys., 35, 117-121, doi:10.5194/angeo-35-117-2017, 2017
      Vector magnetic field instruments mounted on spacecraft require precise in-flight calibration of the offsets of all three axes, i.e., the output in vanishing ambient field. While calibration of the spin plane offsets is trivial, we apply a new technique for determining the spin axis offset, not relying on solar wind data but on magnetosheath encounters. This technique is successfully applied to the satellites of the THEMIS mission to update the calibration parameters of the complete mission.
      PubDate: 2017-01-19T14:04:23+01:00
       
  • Scintillation measurements at Bahir Dar during the high solar activity
           phase of solar cycle 24

    • Abstract: Scintillation measurements at Bahir Dar during the high solar activity phase of solar cycle 24
      Martin Kriegel, Norbert Jakowski, Jens Berdermann, Hiroatsu Sato, and Mogese Wassaie Mersha
      Ann. Geophys., 35, 97-106, doi:10.5194/angeo-35-97-2017, 2017
      Small-scale ionospheric disturbances may cause severe radio scintillations ofsignals transmitted from global navigation satellite systems (GNSSs).Consequently, small-scale plasma irregularities may heavily degrade theperformance of current GNSSs such as GPS, GLONASS or Galileo. This paperpresents analysis results obtained primarily from two high-rate GNSS receiverstations designed and operated by the German Aerospace Center (DLR) incooperation with Bahir Dar University (BDU) at 11.6° N,37.4° E. Both receivers collect raw data sampled at up to 50 Hz, fromwhich characteristic scintillation parameters such as the S4 index arededuced.
      This paper gives a first overview of the measurement set-up and the observedscintillation events over Bahir Dar in 2015. Both stations are located closeto one another and aligned in an east–west, direction which allows us toestimate the zonal drift velocity and spatial dimension of equatorialionospheric plasma irregularities. Therefore, the lag times of movingelectron density irregularities and scintillation patterns are derived byapplying cross-correlation analysis to high-rate measurements of the slanttotal electron content (sTEC) along radio links between a GPS satellite andboth receivers and to the associated signal power,respectively. Finally, the drift velocity is derived from the estimated lagtime, taking into account the geometric constellation of both receivingantennas and the observed GPS satellites.
      PubDate: 2017-01-13T15:25:39+01:00
       
  • Vertical wavenumber spectra of three-dimensional winds revealed by
           radiosonde observations at midlatitude

    • Abstract: Vertical wavenumber spectra of three-dimensional winds revealed by radiosonde observations at midlatitude
      Shao Dong Zhang, Chun Ming Huang, Kai Ming Huang, Ye Hui Zhang, Yun Gong, and Quan Gan
      Ann. Geophys., 35, 107-116, doi:10.5194/angeo-35-107-2017, 2017
      We present the first statistical results of vertical wind fluctuation spectra, which revealed a very shallow spectral structure, with mean slopes of −0.58 and −0.23 in the troposphere and lower stratosphere, respectively. No existing spectral theories can comprehensively explain the observed three-dimensional wind spectra, indicating that the spectral features of atmospheric fluctuations are far from fully understood.
      PubDate: 2017-01-13T15:25:39+01:00
       
  • An improved troposphere tomographic approach considering the signals
           coming from the side face of the tomographic area

    • Abstract: An improved troposphere tomographic approach considering the signals coming from the side face of the tomographic area
      Qingzhi Zhao and Yibin Yao
      Ann. Geophys., 35, 87-95, doi:10.5194/angeo-35-87-2017, 2017
      A troposphere tomographic method has been proposed considering the signal rays penetrating from the side of the area of interest. Given the method above needs the establishment of a unit scale factor model using the radiosonde data at only one location in the research area, an improved approach is proposed by considering the reasonability of modelling data and the diversity of the modelling parameters for building a more accurate unit scale factor model.
      PubDate: 2017-01-11T15:25:39+01:00
       
  • Ground-based acoustic parametric generator impact on the atmosphere and
           ionosphere in an active experiment

    • Abstract: Ground-based acoustic parametric generator impact on the atmosphere and ionosphere in an active experiment
      Yuriy G. Rapoport, Oleg K. Cheremnykh, Volodymyr V. Koshovy, Mykola O. Melnik, Oleh L. Ivantyshyn, Roman T. Nogach, Yuriy A. Selivanov, Vladimir V. Grimalsky, Valentyn P. Mezentsev, Larysa M. Karataeva, Vasyl. M. Ivchenko, Gennadi P. Milinevsky, Viktor N. Fedun, and Eugen N. Tkachenko
      Ann. Geophys., 35, 53-70, doi:10.5194/angeo-35-53-2017, 2017
      Before many catastrophic phenomena such as earthquakes, sound is generated at a very low frequency. It is already established that it can disturb the upper layer of the atmosphere – the ionosphere. Control of disasters' precursors is important. Using the unique, powerful sound generator, whose loudness is comparable to an ascending jet, we have constructed the theory and conducted a series of experiments trying to model acoustic action of disasters on the ionosphere.
      PubDate: 2017-01-05T14:44:46+01:00
       
  • Absence of the strahl during times of slow wind

    • Abstract: Absence of the strahl during times of slow wind
      Chris Gurgiolo and Melvyn L. Goldstein
      Ann. Geophys., 35, 71-85, doi:10.5194/angeo-35-71-2017, 2017
      Observations during periods when the solar wind has a speed
      PubDate: 2017-01-05T14:44:46+01:00
       
  • Induction effects of geomagnetic disturbances in the geo-electric field
           variations at low latitudes

    • Abstract: Induction effects of geomagnetic disturbances in the geo-electric field variations at low latitudes
      Vafi Doumbia, Kouadio Boka, Nguessan Kouassi, Oswald Didier Franck Grodji, Christine Amory-Mazaudier, and Michel Menvielle
      Ann. Geophys., 35, 39-51, doi:10.5194/angeo-35-39-2017, 2017
      The electrical inductions within the Earth surface due to geomagnetic field variations were examined. For that purpose the records of the geomagnetic and geo-electric field variations observed in West Africa were used. We have found that the geomagnetic field brisk variations induce non-negligible geo-electric field variations at low latitudes. This result implies a possible intense geomagnetically induced current flow in the vicinity of the equatorial electrojet influence area.
      PubDate: 2017-01-04T14:44:46+01:00
       
  • Signature of ionospheric irregularities under different geophysical
           

    • Abstract: Signature of ionospheric irregularities under different geophysical conditions on SBAS performance in the western African low-latitude region
      Oladipo Emmanuel Abe, Xurxo Otero Villamide, Claudia Paparini, Rodrigue Herbert Ngaya, Sandro M. Radicella, and Bruno Nava
      Ann. Geophys., 35, 1-9, doi:10.5194/angeo-35-1-2017, 2017
      Rate of change of TEC (ROT) and its index (ROTI) are considered agood proxy to characterize the occurrence of ionospheric plasmairregularities like those observed after sunset at low latitudes. SBASs(satellite-based augmentation systems) are civil aviation systems thatprovide wide-area or regional improvement to single-frequency satellitenavigation using GNSS (Global Navigation Satellite System) constellations.Plasma irregularities in the path of the GNSS signal after sunset causesevere phase fluctuations and loss of locks of the signals in GNSS receiverat low-latitude regions. ROTI is used in this paper to characterize plasmadensity ionospheric irregularities in central–western Africa under nominaland disturbed conditions and identified some days of irregularityinhibition. A specific low-latitude algorithm is used to emulate potentialpossible SBAS message using real GNSS data in the western African low-latituderegion. The performance of a possible SBAS operation in the region underdifferent ionospheric conditions is analysed. These conditions includeeffects of geomagnetic disturbed periods when SBAS performance appears to beenhanced due to ionospheric irregularity inhibition. The results of thispaper could contribute to a feasibility assessment of a European Geostationary Navigation Overlay System-based SBAS inthe sub-Saharan African region.
      PubDate: 2017-01-03T14:44:46+01:00
       
  • On the response of quasi-adiabatic particles to magnetotail
           reconfigurations

    • Abstract: On the response of quasi-adiabatic particles to magnetotail reconfigurations
      Dominique C. Delcourt, Helmi V. Malova, and Lev M. Zelenyi
      Ann. Geophys., 35, 11-23, doi:10.5194/angeo-35-11-2017, 2017
      In a magnetic field reversal, the guiding center may not be valid due to large variation of the magnetic field on the length scale of the particle gyro-radius. Although they do not execute regular helical motion and temporarily meander inside the field reversal, quasi-adiabatic particles exit this reversal with a magnetic moment nearly identical to that at entry. We show that this behavior, which is a steady-state concept, can persist during dipolarization despite the induced electric field.
      PubDate: 2017-01-03T14:44:46+01:00
       
  • Measurements of the total ozone column using a Brewer spectrophotometer
           and TOMS and OMI satellite instruments over the Southern Space Observatory
           in Brazil

    • Abstract: Measurements of the total ozone column using a Brewer spectrophotometer and TOMS and OMI satellite instruments over the Southern Space Observatory in Brazil
      Lucas Vaz Peres, Hassan Bencherif, Nkanyiso Mbatha, André Passaglia Schuch, Abdoulwahab Mohamed Toihir, Nelson Bègue, Thierry Portafaix, Vagner Anabor, Damaris Kirsch Pinheiro, Neusa Maria Paes Leme, José Valentin Bageston, and Nelson Jorge Schuch
      Ann. Geophys., 35, 25-37, doi:10.5194/angeo-35-25-2017, 2017
      In this paper, we analyze the total ozone column over the Southern Space Observatory, Brazil, between 1992 and 2014 by Brewer spectrometer and TOMS and OMI satellite instruments, finding good agreement between the two. In addition, the seasonal TOC variation is dominated by an annual cycle, and the Quasi-Biennial Oscillation modulation was the main mode of interannual variability and in opposite phase to the total ozone column anomaly time series.
      PubDate: 2017-01-03T14:44:46+01:00
       
 
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
Fax: +00 44 (0)131 4513327
 
Home (Search)
Subjects A-Z
Publishers A-Z
Customise
APIs
Your IP address: 174.129.66.66
 
About JournalTOCs
API
Help
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-2016