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• Journal article
  Andrews DJ, Coates AJ, Cowley SWH, Dougherty MK, Lamy L, Provan G, Zarka Pet al., 2010,

  Magnetospheric period oscillations at Saturn: Comparison of equatorial and high-latitude magnetic field periods with north and south Saturn kilometric radiation periods

  , JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 115, ISSN: 2169-9380
  • Author Web Link
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  • Citations: 89
• Journal article
  Burton ME, Dougherty MK, Russell CT, 2010,

  Saturn's internal planetary magnetic field

  , GEOPHYSICAL RESEARCH LETTERS, Vol: 37, ISSN: 0094-8276
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  • Citations: 86
• Journal article
  Simpson IR, Blackburn M, Haigh JD, Sparrow SNet al., 2010,

  The Impact of the State of the Troposphere on the Response to Stratospheric Heating in a Simplified GCM

  , JOURNAL OF CLIMATE, Vol: 23, Pages: 6166-6185, ISSN: 0894-8755
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  • Citations: 21
• Conference paper
  Magner T, Erd C, Pappalardo R, Blanc M, Bunce E, Clark K, Coustenis A, Dougherty M, Gavin T, Grasset O, Greeley R, Van Houten T, Lebreton JP, Prockter LM, Senske D, Sturm E, Titov Det al., 2010,

  The europa jupiter system mission (EJSM): Exploring the emergence of habitable worlds around gas giants

  , Pages: 10338-10350

  The Europa Jupiter System Mission (EJSM) would be an international mission with the overall theme of investigating the emergence of habitable worlds around gas giants. Its goals would be to (1) Explore Europa to investigate its habitability, (2) Characterize Ganymede as a planetary object including its potential habitability and (3) Explore the Jupiter system as an archetype for gas giants. NASA and ESA have concluded a detailed joint study of a mission to Europa, Ganymede, and the Jupiter system. The EJSM architecture consists of two primary elements operating in the Jovian system: the NASA-led Jupiter Europa Orbiter (JEO), and the ESA-led Jupiter Ganymede Orbiter (JGO). JEO and JGO would execute a choreographed exploration of the Jupiter System before settling into orbit around Europa and Ganymede, respectively. EJSM would directly address themes concerning the origin and evolution of icy satellite systems and water-rich environments therein. The potential habitability of the ocean-bearing moons Europa and Ganymede would be investigated, by characterizing the geophysical, compositional, geological, and external processes that affect these icy worlds. EJSM would also investigate Io and Callisto, small satellites and rings, Jupiter's atmosphere, and the Jovian magnetosphere. By better understanding the Jupiter system and unraveling its history, the formation and evolution of gas giant planets and their satellites would be better known. Most important, EJSM would shed new light on the potential for the emergence of life in our celestial neighborhood and beyond. The EJSM notional architecture provides opportunities for coordinated synergistic observations by JEO and JGO of the Jupiter and Ganymede magnetospheres, the volcanoes and torus of Io, the atmosphere of Jupiter, and comparative planetology of icy satellites. Each spacecraft would conduct both such synergistic dual-spacecraft investigations and also stand-alone measurements toward the overall mission theme and

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• Journal article
  Krasnoselskikh V, Vekstein G, Hudson HS, Bale SD, Abbett WPet al., 2010,

  GENERATION OF ELECTRIC CURRENTS IN THE CHROMOSPHERE VIA NEUTRAL-ION DRAG

  , ASTROPHYSICAL JOURNAL, Vol: 724, Pages: 1542-1550, ISSN: 0004-637X
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  • Citations: 23
• Journal article
  Ruffoni MP, Pickering JC, 2010,

  ACCURATE LABORATORY WAVELENGTHS OF THE 1910 Å Ti II RESONANCE TRANSITIONS RELEVANT TO STUDIES OF POSSIBLE VARIATIONS OF THE FINE-STRUCTURE CONSTANT

  , ASTROPHYSICAL JOURNAL, Vol: 725, Pages: 424-429, ISSN: 0004-637X
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  • Citations: 7
• Journal article
  Sparks N, Toumi R, 2010,

  Remote sampling of a CO₂ point source in an urban setting

  , ATMOSPHERIC ENVIRONMENT, Vol: 44, Pages: 5287-5294, ISSN: 1352-2310
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  • Citations: 16
• Book chapter
  Haigh JD, 2010,

  Solar Variability and the Stratosphere

  , The Stratosphere: Dynamics, Transport and Chemistry, Editors: Polvani, Sobel, Waugh, Washington, DC, Publisher: American Geophysical Union, Pages: 173-187, ISBN: 9780875904795
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• Journal article
  Moore L, Mueller-Wodarg I, Galand M, Kliore A, Mendillo Met al., 2010,

  Latitudinal variations in Saturn's ionosphere: Cassini measurements and model comparisons

  , JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 115, ISSN: 2169-9380
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  • Citations: 23
• Journal article
  Voulgarakis A, Shindell DT, 2010,

  Constraining the Sensitivity of Regional Climate with the Use of Historical Observations

  , JOURNAL OF CLIMATE, Vol: 23, Pages: 6068-6073, ISSN: 0894-8755
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  • Citations: 7
• Journal article
  Carbary JF, Achilleos N, Arridge CS, Khurana KK, Dougherty MKet al., 2010,

  Global configuration of Saturn's magnetic field derived from observations

  , GEOPHYSICAL RESEARCH LETTERS, Vol: 37, ISSN: 0094-8276
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  • Citations: 12
• Journal article
  Gray LJ, Beer J, Geller M, Haigh JD, Lockwood M, Matthes K, Cubasch U, Fleitmann D, Harrison G, Hood L, Luterbacher J, Meehl GA, Shindell D, van Geel B, White Wet al., 2010,

  SOLAR INFLUENCES ON CLIMATE

  , REVIEWS OF GEOPHYSICS, Vol: 48, ISSN: 8755-1209
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  • Citations: 1026
• Patent
  Carr CM, 2010,

  Imperial College MRMAG Magnetoresistive Magnetometer: License for commercial exploitation by Satellite Services Ltd.

  , N/A

  This license concerns the magnetometer instrument known as ‘MRMAG’ developed by the Space & Atmospheric Physics group (SPAT) of Imperial College. The magnetometer is a sensitive instrument for the measurement of magnetic fields. Under this license, Satellite Services is granted exclusive rights to market the magnetometer for satellite on-board attitude determination.

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• Journal article
  Jackman CM, Arridge CS, Slavin JA, Milan SE, Lamy L, Dougherty MK, Coates AJet al., 2010,

  In situ observations of the effect of a solar wind compression on Saturn's magnetotail

  , JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 115, ISSN: 2169-9380
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  • Citations: 36
• Journal article
  Edberg NJT, Wahlund J-E, Agren K, Morooka MW, Modolo R, Bertucci C, Dougherty MKet al., 2010,

  Electron density and temperature measurements in the cold plasma environment of Titan: Implications for atmospheric escape

  , GEOPHYSICAL RESEARCH LETTERS, Vol: 37, ISSN: 0094-8276
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  • Citations: 44
• Journal article
  Liu Y, Thernisien A, Luhmann JG, Vourlidas A, Davies JA, Lin RP, Bale SDet al., 2010,

  RECONSTRUCTING CORONAL MASS EJECTIONS WITH COORDINATED IMAGING AND IN SITU OBSERVATIONS: GLOBAL STRUCTURE, KINEMATICS, AND IMPLICATIONS FOR SPACE WEATHER FORECASTING

  , ASTROPHYSICAL JOURNAL, Vol: 722, Pages: 1762-1777, ISSN: 0004-637X
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  • Citations: 131
• Journal article
  Bunce EJ, Cowley SWH, Talboys DL, Dougherty MK, Lamy L, Kurth WS, Schippers P, Cecconi B, Zarka P, Arridge CS, Coates AJet al., 2010,

  Extraordinary field-aligned current signatures in Saturn's high-latitude magnetosphere: Analysis of Cassini data during Revolution 89

  , JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 115, ISSN: 2169-9380
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  • Citations: 27
• Journal article
  Wei HY, Russell CT, Dougherty MK, Neubauer FM, Ma YJet al., 2010,

  Upper limits on Titan's magnetic moment and implications for its interior

  , JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, Vol: 115, ISSN: 2169-9097
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  • Citations: 20
• Journal article
  Haigh JD, Winning AR, Toumi R, Harder JWet al., 2010,

  An influence of solar spectral variations on radiative forcing of climate

  , NATURE, Vol: 467, Pages: 696-699, ISSN: 0028-0836
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  • Citations: 198
• Journal article
  Matteini L, Landi S, Del Zanna L, Velli M, Hellinger Pet al., 2010,

  Parametric decay of linearly polarized shear Alfvén waves in oblique propagation: One and two‐dimensional hybrid simulations

  , Geophysical Research Letters, Vol: 37, ISSN: 0094-8276

  <jats:p>The parametric instability of a monochromatic shear Alfvén wave in oblique propagation with respect the ambient magnetic field is investigated in a kinetic regime, performing one‐dimensional (1‐D) and two‐dimensional (2‐D) hybrid simulations. The parallel component of the mother wave is found to be subject to a parametric decay which excites an ion‐acoustic wave along the magnetic field and a backward propagating daughter shear Alfvén wave, as in the instability for a purely parallel mother wave. At the same time, the acoustic wave generation supports the acceleration of a velocity beam in the ion distribution function, due to the non‐linear trapping of protons. Moreover, the instability leads to the generation of broad band oblique spectra of coupled Alfvénic and compressive modes with variable perpendicular wavevectors, and, as a consequence, the magnetic field after saturation is characterized by a strong transverse modulation.</jats:p>

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• Journal article
  Petrosyan A, Balogh A, Goldstein ML, Leorat J, Marsch E, Petrovay K, Roberts B, von Steiger R, Vial JCet al., 2010,

  Turbulence in the Solar Atmosphere and Solar Wind

  , SPACE SCIENCE REVIEWS, Vol: 156, Pages: 135-238, ISSN: 0038-6308
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  • Citations: 59
• Journal article
  Sigsbee K, Kletzing CA, Pickett JS, Gurnett DA, Schwartz SJ, Lefebvre B, Lucek E, Fazakerley AN, Kucharek Het al., 2010,

  Characteristics of Langmuir electric field waveforms and power spectra exhibiting nonlinear behavior in Earth’s foreshock

  , Journal of Geophysical Research (Space Physics), Vol: 115, Pages: A10251-A10251
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• Journal article
  Simon S, Wennmacher A, Neubauer FM, Bertucci CL, Kriegel H, Russell CT, Dougherty MKet al., 2010,

  Dynamics of Saturn's magnetodisk near Titan's orbit: Comparison of Cassini magnetometer observations from real and virtual Titan flybys

  , PLANETARY AND SPACE SCIENCE, Vol: 58, Pages: 1625-1635, ISSN: 0032-0633
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  • Citations: 23
• Journal article
  Rodriguez-Martinez M, Blanco-Cano X, Russell CT, Leisner JS, Wilson RJ, Dougherty MKet al., 2010,

  Harmonic growth of ion-cyclotron waves in Saturn's magnetosphere

  , JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 115, ISSN: 2169-9380
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  • Citations: 15
• Journal article
  Wicks RT, Horbury TS, Chen CHK, Schekochihin AAet al., 2010,

  Power and Spectral Index Anisotropy of the Entire Inertial Range of Turbulence in the Fast Solar Wind

  , Monthly Notices of the Royal Astronomical Society, Vol: 407, Pages: L31-L35, ISSN: 0035-8711

  We measure the power and spectral index anisotropy of magnetic field fluctuations in fast solar wind turbulence from scales larger than the outer scale down to the ion gyroscale, thus covering the entire inertial range. We show that the power and spectral indices above the outer scale of turbulence are approximately isotropic. The turbulent cascade causes the power anisotropy at smaller scales manifested by anisotropic scalings of the spectrum: close to k−5/3 across and k−2 along the local magnetic field, consistent with a critically balanced Alfvénic turbulence. By using data at different radial distances from the Sun and calculating the radial dependence of the ratio of the outer scale to the ion gyroscale, we show that the width of the inertial range does not change with heliocentric distance. At the smallest scales of the inertial range, close to the ion gyroscale, we find an enhancement of power parallel to the magnetic field direction coincident with a decrease in the perpendicular power. This is most likely related to energy injection by ion kinetic modes such as the firehose instability and also marks the beginning of the kinetic range, sometimes called the dissipation range, of solar wind turbulence.

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• Journal article
  Matteini L, Landi S, Velli M, Hellinger Pet al., 2010,

  Kinetics of parametric instabilities of Alfvén waves: Evolution of ion distribution functions

  , Journal of Geophysical Research: Space Physics, Vol: 115, ISSN: 0148-0227

  <jats:p>Using numerical simulations in a hybrid regime, we studied the evolution of large‐amplitude Alfvén waves subject to modulational and decay instabilities, including the effects of ion kinetics. We considered both a monochromatic and incoherent spectrum of waves, different wave polarizations and amplitudes, and different plasma regimes, ranging from <jats:italic>β</jats:italic> &lt; 1 to <jats:italic>β</jats:italic> &gt; 1. We found in all cases that ion dynamics affects the instability evolution and saturation; as a feedback, wave‐particle interactions provide a nonlinear trapping of resonant particles that importantly change the properties of the ion velocity distribution functions. In particular, we observed a proton acceleration along the magnetic field and in some cases the formation of a parallel velocity beam traveling faster than the rest of the distribution. For the range of parameters used in our simulations, the fundamental ingredient in generating an ion beam is observed to be the parallel electric field carried by the density fluctuations driven by the ion‐acoustic modes generated by the parametric instabilities.</jats:p>

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• Journal article
  Cravens TE, Richard M, Ma Y-J, Bertucci C, Luhmann JG, Ledvina S, Robertson IP, Wahlund J-E, Agren K, Cui J, Muller-Wodarg I, Waite JH, Dougherty M, Bell J, Ulusen Det al., 2010,

  Dynamical and magnetic field time constants for Titan's ionosphere: Empirical estimates and comparisons with Venus

  , JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 115, ISSN: 2169-9380
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  • Citations: 35
• Journal article
  Zaslavsky A, Volokitin AS, Krasnoselskikh VV, Maksimovic M, Bale SDet al., 2010,

  Spatial localization of Langmuir waves generated from an electron beam propagating in an inhomogeneous plasma: Applications to the solar wind

  , JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 115, ISSN: 2169-9380
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  • Citations: 21
• Journal article
  Gurnett DA, Persoon AM, Kopf AJ, Kurth WS, Morooka MW, Wahlund J-E, Khurana KK, Dougherty MK, Mitchell DG, Krimigis SM, Krupp Net al., 2010,

  A plasmapause-like density boundary at high latitudes in Saturn's magnetosphere

  , GEOPHYSICAL RESEARCH LETTERS, Vol: 37, ISSN: 0094-8276
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  • Citations: 39
• Journal article
  Rouillard AP, Lavraud B, Sheeley NR, Davies JA, Burlaga LF, Savani NP, Jacquey C, Forsyth RJet al., 2010,

  WHITE LIGHT AND IN SITU COMPARISON OF A FORMING MERGED INTERACTION REGION

  , ASTROPHYSICAL JOURNAL, Vol: 719, Pages: 1385-1392, ISSN: 0004-637X
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  • Citations: 39

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