Results
- Showing results for:
- Reset all filters
Search results
-
Journal articleSouthwood D, 2014,
Space science and policy
, ASTRONOMY & GEOPHYSICS, Vol: 55, Pages: 26-32, ISSN: 1366-8781 -
Journal articleGenestreti KJ, Fuselier SA, Goldstein J, et al., 2014,
The location and rate of occurrence of near-Earth magnetotail reconnection as observed by Cluster and Geotail
, JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, Vol: 121, Pages: 98-109, ISSN: 1364-6826- Author Web Link
- Cite
- Citations: 28
-
Journal articleQureshi MNS, Nasir W, Masood W, et al., 2014,
Terrestrial lion roars and non-Maxwellian distribution
, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, ISSN: 2169-9380- Author Web Link
- Open Access Link
- Cite
- Citations: 58
-
Journal articleHunt GJ, Cowley SWH, Provan G, et al., 2014,
Field-aligned currents in Saturn's southern nightside magnetosphere: Subcorotation and planetary period oscillation components
, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, ISSN: 2169-9380- Author Web Link
- Cite
- Citations: 85
-
Journal articleMasters A, Achilleos N, Agnor CB, et al., 2014,
Neptune and Triton: Essential pieces of the Solar System puzzle
, PLANETARY AND SPACE SCIENCE, Vol: 104, Pages: 108-121, ISSN: 0032-0633- Author Web Link
- Open Access Link
- Cite
- Citations: 27
-
Journal articleCoustenis A, Atreya S, Castillo J, et al., 2014,
Surfaces, atmospheres and magnetospheres of the outer planets and their satellites and ring systems: Part X Preface
, PLANETARY AND SPACE SCIENCE, Vol: 104, Pages: 1-2, ISSN: 0032-0633 -
Journal articleBalogh A, Hudson HS, Petrovay K, et al., 2014,
Introduction to the Solar Activity Cycle: Overview of Causes and Consequences
, SPACE SCIENCE REVIEWS, Vol: 186, Pages: 1-15, ISSN: 0038-6308- Author Web Link
- Cite
- Citations: 35
-
Journal articleArridge CS, Achilleos N, Agarwal J, et al., 2014,
The science case for an orbital mission to Uranus: Exploring the origins and evolution of ice giant planets
, PLANETARY AND SPACE SCIENCE, Vol: 104, Pages: 122-140, ISSN: 0032-0633- Author Web Link
- Cite
- Citations: 48
-
Journal articleChen CHK, Leung L, Boldyrev S, et al., 2014,
Ion-scale spectral break of solar wind turbulence at high and low beta
, GEOPHYSICAL RESEARCH LETTERS, Vol: 41, Pages: 8081-8088, ISSN: 0094-8276- Author Web Link
- Open Access Link
- Cite
- Citations: 126
-
Journal articleVigren E, Galand M, Yelle RV, et al., 2014,
Ionization balance in Titan's nightside ionosphere
, Icarus, Vol: 248, Pages: 539-546, ISSN: 0019-1035 -
Journal articleLacombe C, Alexandrova O, Matteini L, et al., 2014,
Whistler mode waves and the electron heat flux in the Solar wind: cluster observations
, The Astrophysical Journal: an international review of astronomy and astronomical physics, Vol: 796, Pages: 1-11, ISSN: 0004-637XThe nature of the magnetic field fluctuations in the solar wind between the ion and electron scales is still under debate. Using the Cluster/STAFF instrument, we make a survey of the power spectral density and of the polarization of these fluctuations at frequencies f in [1, 400] Hz, during five years (2001-2005), when Cluster was in the free solar wind. In ~10% of the selected data, we observe narrowband, right-handed, circularly polarized fluctuations, with wave vectors quasi-parallel to the mean magnetic field, superimposed on the spectrum of the permanent background turbulence. We interpret these coherent fluctuations as whistler mode waves. The lifetime of these waves varies between a few seconds and several hours. Here, we present, for the first time, an analysis of long-lived whistler waves, i.e., lasting more than five minutes. We find several necessary (but not sufficient) conditions for the observation of whistler waves, mainly a low level of background turbulence, a slow wind, a relatively large electron heat flux, and a low electron collision frequency. When the electron parallel beta factor β e∥ is larger than 3, the whistler waves are seen along the heat flux threshold of the whistler heat flux instability. The presence of such whistler waves confirms that the whistler heat flux instability contributes to the regulation of the solar wind heat flux, at least for β e∥ ≥ 3, in slow wind at 1 AU.
-
Journal articleWeiss Z, Steers EBM, Pickering JC, et al., 2014,
Excitation and transition rate diagrams of singly ionized iron in analytical glow discharges in argon, neon and an argon-hydrogen mixture
, JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, Vol: 29, Pages: 2078-2090, ISSN: 0267-9477- Author Web Link
- Cite
- Citations: 11
-
Journal articleBall WT, Krivova NA, Unruh YC, et al., 2014,
A new SATIRE-S spectral solar irradiance reconstruction for solar cycles 21-23 and its implications for stratospheric Ozone
, Journal of the Atmospheric Sciences, Vol: 71, Pages: 4086-4101, ISSN: 0022-4928The authors present a revised and extended total and spectral solar irradiance (SSI) reconstruction, which includes a wavelength-dependent uncertainty estimate, spanning the last three solar cycles using the Spectral and Total Irradiance Reconstruction—Satellite era (SATIRE-S) model. The SSI reconstruction covers wavelengths between 115 and 160 000 nm and all dates between August 1974 and October 2009. This represents the first full-wavelength SATIRE-S reconstruction to cover the last three solar cycles without data gaps and with an uncertainty estimate. SATIRE-S is compared with the Naval Research Laboratory Spectral Solar Irradiance (NRLSSI) model and ultraviolet (UV) observations from the Solar Radiation and Climate Experiment (SORCE) Solar Stellar Irradiance Comparison Experiment (SOLSTICE). SATIRE-S displays similar cycle behavior to NRLSSI for wavelengths below 242 nm and almost twice the variability between 242 and 310 nm. During the decline of the last solar cycle, between 2003 and 2008, the SSI from SORCE SOLSTICE versions 12 and 10 typically displays more than 3 times the variability of SATIRE-S between 200 and 300 nm. All three datasets are used to model changes in stratospheric ozone within a 2D atmospheric model for a decline from high solar activity to solar minimum. The different flux changes result in different modeled ozone trends. Using NRLSSI leads to a decline in mesospheric ozone, while SATIRE-S and SORCE SOLSTICE result in an increase. Recent publications have highlighted increases in mesospheric ozone when considering version 10 SORCE SOLSTICE irradiances. The recalibrated SORCE SOLSTICE version 12 irradiances result in a much smaller mesospheric ozone response than that of version 10, and this smaller mesospheric ozone response is similar in magnitude to that of SATIRE-S. This shows that current knowledge of variations in spectral irradiance is not sufficient to warrant robust conclusions concerning the impact of solar variability on th
-
Journal articleMushtaq S, Steers EBM, Pickering JC, et al., 2014,
Enhancement of analyte atomic lines with excitation energies of about 5 eV in the presence of molecular gases in analytical glow discharges
, JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, Vol: 29, Pages: 2022-2026, ISSN: 0267-9477- Author Web Link
- Cite
- Citations: 8
-
Journal articleMushtaq S, Steers EBM, Pickering JC, et al., 2014,
Effect of small quantities of oxygen in a neon glow discharge
, JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, Vol: 29, Pages: 2027-2041, ISSN: 0267-9477- Author Web Link
- Cite
- Citations: 12
-
Journal articleNordheim TA, Jones GH, Roussos E, et al., 2014,
Detection of a strongly negative surface potential at Saturn's moon Hyperion
, Geophysical Research Letters, Vol: 41, Pages: 7011-7018, ISSN: 1944-8007On 26 September 2005, Cassini conducted its only close targeted flyby of Saturn’s small, irregularlyshaped moon Hyperion. Approximately 6 min before the closest approach, the electron spectrometer (ELS),part of the Cassini Plasma Spectrometer (CAPS) detected a field-aligned electron population originating fromthe direction of the moon’s surface. Plasma wave activity detected by the Radio and Plasma Wave instrumentsuggests electron beam activity. A dropout in energetic electrons was observed by both CAPS-ELS and theMagnetospheric Imaging Instrument Low-Energy Magnetospheric Measurement System, indicating that themoon and the spacecraft were magnetically connected when the field-aligned electron population wasobserved. We show that this constitutes a remote detection of a strongly negative (~ 200 V) surface potentialon Hyperion, consistent with the predicted surface potential in regions near the solar terminator.
-
Journal articlePhan TD, Drake JF, Shay MA, et al., 2014,
Ion bulk heating in magnetic reconnection exhausts at Earth's magnetopause: Dependence on the inflow Alfven speed and magnetic shear angle
, GEOPHYSICAL RESEARCH LETTERS, Vol: 41, Pages: 7002-7010, ISSN: 0094-8276- Author Web Link
- Cite
- Citations: 65
-
Journal articleArcher MO, Turner DL, Eastwood JP, et al., 2014,
The role of pressure gradients in driving sunward magnetosheath flows and magnetopause motion
, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 8117-8125, ISSN: 2169-9380- Author Web Link
- Open Access Link
- Cite
- Citations: 39
-
Journal articleSlavin JA, DiBraccio GA, Gershman DJ, et al., 2014,
MESSENGER observations of Mercury's dayside magnetosphere under extreme solar wind conditions
, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 8087-8116, ISSN: 2169-9380- Author Web Link
- Cite
- Citations: 113
-
Journal articleRieutord M, Beth A, 2014,
Dynamics of the radiative envelope of rapidly rotating stars: Effects of spin-down driven by mass loss
, ASTRONOMY & ASTROPHYSICS, Vol: 570, ISSN: 0004-6361- Author Web Link
- Cite
- Citations: 9
-
Journal articleJinks SL, Bunce EJ, Cowley SWH, et al., 2014,
Cassini multi-instrument assessment of Saturn's polar cap boundary
, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 8161-8177, ISSN: 2169-9380- Author Web Link
- Cite
- Citations: 31
-
Journal articleMoore L, O'Donoghue J, Mueller-Wodarg I, et al., 2014,
Saturn ring rain: Model estimates of water influx into Saturn's atmosphere
, Icarus, Vol: 245, Pages: 355-366, ISSN: 0019-1035 -
Journal articleGryspeerdt E, Stier P, Partridge DG, 2014,
Links between satellite-retrieved aerosol and precipitation
, Atmospheric Chemistry and Physics, Vol: 14, Pages: 9677-9694, ISSN: 1680-7324 -
Journal articleBall WT, Mortlock DJ, Egerton JS, et al., 2014,
Assessing the relationship between spectral solar irradiance and stratospheric ozone using Bayesian inference
, JOURNAL OF SPACE WEATHER AND SPACE CLIMATE, Vol: 4, ISSN: 2115-7251- Author Web Link
- Cite
- Citations: 7
-
Journal articleVarsani A, Owen CJ, Fazakerley AN, et al., 2014,
Cluster observations of the substructure of a flux transfer event: analysis of high-time-resolution particle data
, ANNALES GEOPHYSICAE, Vol: 32, Pages: 1093-1117, ISSN: 0992-7689 -
Journal articleProvan G, Lamy L, Cowley SWH, et al., 2014,
Planetary period oscillations in Saturn's magnetosphere: Comparison of magnetic oscillations and SKR modulations in the postequinox interval
, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, ISSN: 2169-9380- Author Web Link
- Cite
- Citations: 43
-
Journal articleNewton B, Cowie S, Rijks D, et al., 2014,
SOLAR COOKING IN THE SAHEL
, BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY, Vol: 95, Pages: 1325-1328, ISSN: 0003-0007- Author Web Link
- Cite
- Citations: 3
-
Journal articleCheung JCH, Haigh JD, Jackson DR, 2014,
Impact of EOS MLS ozone data on medium-extended range ensemble weather forecasts
, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, Vol: 119, Pages: 9253-9266, ISSN: 2169-897X- Author Web Link
- Cite
- Citations: 24
-
Journal articleYang YY, Shen C, Zhang YC, et al., 2014,
The force-free configuration of flux ropes in geomagnetotail: Cluster observations
, Journal of Geophysical Research: Space Physics, Vol: 119, Pages: 6327-6341, ISSN: 2169-9402Unambiguous knowledge of magnetic field structure and the electric current distribution is critical for understanding the origin, evolution, and related dynamic properties of magnetic flux ropes (MFRs). In this paper, a survey of 13 MFRs in the Earth's magnetotail are conducted by Cluster multipoint analysis, so that their force-free feature, i.e., the kind of magnetic field structure satisfying J × B = 0, can be probed directly. It is showed that the selected flux ropes with the bipolar signature of the south-north magnetic field component generally lie near the equatorial plane, as expected, and that the magnetic field gradient is rather weak near the axis center, where the curvature radius is large. The current density (up to several tens of nA/m2) reaches their maximum values as the center is approached. It is found that the stronger the current density, the smaller the angles between the magnetic field and current in MFRs. The direct observations show that only quasi force-free structure is observed, and it tends to appear in the low plasma beta regime (in agreement with the theoretic results). The quasi force-free region is generally found to be embedded in the central portion of the MFRs, where the current is approximately field aligned and proportional to the strength of core field. It is shown that ~60% of surveyed MFRs can be globally approximated as force free. The force-free factor α is found to be nonconstantly varied through the quasi force-free MFR, suggesting that the force-free structure is nonlinear.
-
Journal articlePulupa MP, Salem C, Phan TD, et al., 2014,
CORE ELECTRON HEATING IN SOLAR WIND RECONNECTION EXHAUSTS
, ASTROPHYSICAL JOURNAL LETTERS, Vol: 791, ISSN: 2041-8205- Author Web Link
- Cite
- Citations: 12
This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.