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  • Journal article
    Vigren E, Galand M, Yelle RV, Cui J, Wahlund J-E, Agren K, Lavvas PP, Mueller-Wodarg ICF, Strobel DF, Vuitton V, Bazin Aet al., 2013,

    On the thermal electron balance in Titan's sunlit upper atmosphere

    , ICARUS, Vol: 223, Pages: 234-251, ISSN: 0019-1035
    • Cite
    • Citations: 36
  • Journal article
    Masters A, Stawarz L, Fujimoto M, Schwartz SJ, Sergis N, Thomsen MF, Retino A, Hasegawa H, Zieger B, Lewis GR, Coates AJ, Canu P, Dougherty MKet al., 2013,

    Electron acceleration to relativistic energies at a strong quasi-parallel shock wave

    , NATURE PHYSICS, Vol: 9, Pages: 164-167, ISSN: 1745-2473
    • Cite
    • Citations: 77
  • Journal article
    Lavvas P, Yelle RV, Koskinen T, Bazin A, Vuitton V, Vigren E, Galand M, Wellbrock A, Coates AJ, Wahlund J-E, Crary FJ, Snowden Det al., 2013,

    Aerosol growth in Titan's ionosphere

    , PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Vol: 110, Pages: 2729-2734, ISSN: 0027-8424
    • Cite
    • Citations: 122
  • Journal article
    Matteini L, Landi S, Velli M, Matthaeus WHet al., 2013,

    Proton temperature anisotropy and magnetic reconnection in the solar wind: effects of kinetic instabilities on current sheet stability

    , The Astrophysical Journal: an international review of astronomy and astronomical physics, Vol: 763, ISSN: 0004-637X

    We investigate the role of kinetic instabilities driven by a proton anisotropy on the onset of magnetic reconnection by means of two-dimensional hybrid simulations. The collisionless tearing of a current sheet is studied in the presence of a proton temperature anisotropy in the surrounding plasma. Our results confirm that anisotropic protons within the current sheet region can significantly enhance/stabilize the tearing instability of the current. Moreover, fluctuations associated with linear instabilities excited by large proton temperature anisotropies can significantly influence the stability of the plasma and perturb the current sheets, triggering the tearing instability. We find that such a complex coupling leads to a faster tearing evolution in the $T_\perp >T_\Vert$ regime when an ion-cyclotron instability is generated by the anisotropic proton distribution functions. On the contrary, in the presence of the opposite anisotropy, fire-hose fluctuations excited by the unstable background protons with $T_\Vert <T_\perp$ are not able to efficiently destabilize current sheets, which remain stable for a long time after fire-hose saturation. We discuss possible influences of this novel coupling on the solar wind and heliospheric plasma dynamics.
  • Journal article
    Shi QQ, Zong Q-G, Fu SY, Dunlop MW, Pu ZY, Parks GK, Wei Y, Li WH, Zhang H, Nowada M, Wang YB, Sun WJ, Xiao T, Reme H, Carr C, Fazakerley AN, Lucek Eet al., 2013,

    Solar wind entry into the high-latitude terrestrial magnetosphere during geomagnetically quiet times

    , NATURE COMMUNICATIONS, Vol: 4, ISSN: 2041-1723
    • Cite
    • Citations: 81
  • Journal article
    Cargill P, 2013,

    SOLAR PHYSICS Towards ever smaller length scales

    , NATURE, Vol: 493, Pages: 485-486, ISSN: 0028-0836
  • Journal article
    Cui J, Lian Y, Mueller-Wodarg ICF, 2013,

    Compositional effects in Titan's thermospheric gravity waves

    , GEOPHYSICAL RESEARCH LETTERS, Vol: 40, Pages: 43-47, ISSN: 0094-8276
  • Journal article
    Wicks RT, Mallet A, Horbury TS, Chen CHK, Schekochihin AA, Mitchell JJet al., 2013,

    Alignment and Scaling of Large-Scale Fluctuations in the Solar Wind

    , Physical Review Letters, Vol: 110, Pages: 025003-025003, ISSN: 0031-9007
  • Conference paper
    Fox C, Pickering JC, Beeby R, Murray JE, Last A, Green PDet al., 2013,

    Studies of the far IR water vapour continuum from CAVIAR and RHUBC campaigns using TAFTS

    We report results from the participation of the Imperial College TAFTS instrument in the CAVIAR and RHUBC field campaigns, validating a derived water vapor continuum parameterization in the far-IR spectral region. © OSA 2013.
  • Conference paper
    Fox C, Pickering JC, Beeby R, Murray JE, Last A, Green PDet al., 2013,

    Studies of the far IR water vapour continuum from caviar and RHUBC campaigns using TAFTS

    We report results from the participation of the Imperial College TAFTS instrument in the CAVIAR and RHUBC field campaigns, validating a derived water vapor continuum parameterization in the far-IR spectral region. © OSA 2013.
  • Conference paper
    Fox C, Pickering JC, Beeby R, Murray JE, Last A, Green PDet al., 2013,

    Studies of the far IR water vapour continuum from caviar and RHUBC campaigns using TAFTS

    We report results from the participation of the Imperial College TAFTS instrument in the CAVIAR and RHUBC field campaigns, validating a derived water vapor continuum parameterization in the far-IR spectral region. © OSA 2013.
  • Conference paper
    Fox C, Pickering JC, Beeby R, Murray JE, Last A, Green PDet al., 2013,

    Studies of the far IR water vapour continuum from caviar and RHUBC campaigns using TAFTS

    We report results from the participation of the Imperial College TAFTS instrument in the CAVIAR and RHUBC field campaigns, validating a derived water vapor continuum parameterization in the far-IR spectral region. © OSA 2013.
  • Conference paper
    Seo Y, Chae KS, Mochizuki B, Clarino D, Yeung N, Yoon S, Seon J, Jin H, Lee DH, Lin RP, Sample J, Immel T, Brown P, Horbury TSet al., 2013,

    Instrument interface module between the on-board-computer and payloads in cinema CUBESAT as developed with FPGA

    , Pages: 4275-4281, ISSN: 0074-1795

    TRiplet Ionospheric Observatory-Cubesat for Ion, Neutral, Electron and MAgnetic fields (TRIO-CINEMA) is a space science mission consisting of three identical 3U CubeSats to provide stereo Energetic Neutral Atom (ENA) imaging of the ring current, multi-point in-situ measurement of supra thermal electrons and ions, and measurement of magnetic fields in Low Earth Orbit (LEO). Each spacecraft is equipped with a Supra Thermal Electrons, Ions, Neutrals (STEIN) instrument and a MAGnetometer from Imperial College (MAGIC) instrument in order to measure the plasma particles with diverse species and energies and magnetic fields. STEIN is able to distinguish electrons, ions, and neutrals by applying electric field in the entrance aperture. MAGIC is a dual 3-axis magnetoresistive sensor intended for attitude control and scientific measurement. The standard spacecraft CubeSat employed for the TRIO- CINEMA mission often utilizes Commercial-Off-The Shelf (COTS) electronics to build bus avionics that provides power and communications, whereas payloads are usually built in accordance with specific requirements that are often more demanding in terms of generation, transmission and storage of the data and power consumption. Therefore, designing and developing the interface to be compatible between mission payloads and the CubeSat avionics built with COTS will be required for many CubeSat missions. In this presentation, we describe the instrument interface module between the On-Board-Computer (OBC) and the mission payloads for TRIO-CINEMA spacecraft. The module is developed to provide required communication and power interfaces. In the instrument interface module, a Field Programmable Gate Array (FPGA) is employed to support computing power of the OBC and communication interfaces. It is exclusively operated as data buffer and framer for generated data from mission payloads and their subsequent transmission through S-band to the ground station. The interface module provides various elect
  • Conference paper
    Masters A, Stawarz Ł, Fujimoto M, Schwartz SJ, Sergis N, Thomsen MF, Retinò A, Hasegawa H, Zieger B, Lewis GR, Coates AJ, Canu P, Dougherty MKet al., 2013,

    Electron acceleration to relativistic energies at a strong quasi-parallel shock wave

    Electrons can be accelerated to ultrarelativistic energies at strong (high-Mach number) collisionless shock waves that form when stellar debris rapidly expands after a supernova [4, 2, 19]. Collisionless shock waves also form in the flow of particles from the Sun (the solar wind), and extensive spacecraft observations have established that electron acceleration at these shocks is effectively absent whenever the upstream magnetic field is roughly parallel to the shock surface normal (quasi-parallel conditions) [16, 8, 10, 17, 14]. However, it is unclear whether this magnetic dependence of electron acceleration also applies to the far stronger shocks around young supernova remnants, where local magnetic conditions are poorly understood. Here we present Cassini spacecraft observations of an unusually strong solar system shock wave (Saturn’s bow shock) where significant local electron acceleration has been confirmed under quasi- parallel magnetic conditions for the first time, contradicting the established magnetic dependence of electron acceleration at solar system shocks [16, 8, 10, 17, 14]. Furthermore, the acceleration led to electrons at relativistic energies (∼ MeV), comparable to the highest energies ever attributed to shock-acceleration in the solar wind [16]. These observations suggest that at high-Mach numbers, like those of young supernova remnant shocks, quasi-parallel shocks become considerably more effective electron accelerators. For full details please see: Nature Physics, Volume 9, Issue 3, pp. 164-167.
  • Journal article
    Nakamura R, Plaschke F, Teubenbacher R, Giner L, Baumjohann W, Magnes W, Steller M, Torbert RB, Vaith H, Chutter M, Fornacon K-H, Glassmeier K-H, Carr Cet al., 2013,

    Inter-instrument calibration using magnetic field data from Flux Gate Magnetometer (FGM) and Electron Drift Instrument (EDI) onboard Cluster

    , GEOSCIENTIFIC INSTRUMENTATION METHODS AND DATA SYSTEMS, Vol: 3, Pages: 459-487, ISSN: 2193-0856
  • Journal article
    Pudney MA, Carr CM, Schwartz SJ, Howarth SIet al., 2013,

    Near equipment magnetic field verification and scaling

    , GEOSCIENTIFIC INSTRUMENTATION METHODS AND DATA SYSTEMS, Vol: 3, Pages: 437-458, ISSN: 2193-0856
  • Journal article
    Kasahara S, Kronberg EA, Kimura T, Tao C, Badman SV, Masters A, Retino A, Krupp N, Fujimoto Met al., 2013,

    Asymmetric distribution of reconnection jet fronts in the Jovian nightside magnetosphere

    , JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 118, Pages: 375-384, ISSN: 2169-9380
  • Journal article
    Banks JR, Brindley HE, 2013,

    Evaluation of MSG-SEVIRI mineral dust retrieval products over North Africa and the Middle East

    , REMOTE SENSING OF ENVIRONMENT, Vol: 128, Pages: 58-73, ISSN: 0034-4257
  • Journal article
    Orr A, Bracegirdle TJ, Hosking JS, Feng W, Roscoe HK, Haigh JDet al., 2013,

    Strong Dynamical Modulation of the Cooling of the Polar Stratosphere Associated with the Antarctic Ozone Hole

    , JOURNAL OF CLIMATE, Vol: 26, Pages: 662-668, ISSN: 0894-8755
  • Journal article
    Graven HD, Xu X, Guilderson TP, Keeling RF, Trumbore SE, Tyler Set al., 2013,

    COMPARISON OF INDEPENDENT Δ<SUP>14</SUP>CO<sub>2</sub> RECORDS AT POINT BARROW, ALASKA

    , RADIOCARBON, Vol: 55, Pages: 1541-1545, ISSN: 0033-8222
  • Book chapter
    Solanki SK, Krivova NA, Haigh JD, 2013,

    Solar Irradiance Variability and Climate

    , ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, VOL 51, Editors: Faber, VanDishoeck, Publisher: ANNUAL REVIEWS, Pages: 311-351
  • Journal article
    Dhomse SS, Chipperfield MP, Feng W, Ball WT, Unruh YC, Haigh JD, Krivova NA, Solanki SK, Smith AKet al., 2013,

    Stratospheric O<sub>3</sub> changes during 2001-2010: the small role of solar flux variations in a chemical transport model

    , ATMOSPHERIC CHEMISTRY AND PHYSICS, Vol: 13, Pages: 10113-10123, ISSN: 1680-7316
  • Journal article
    Archer MO, Hartinger MD, Horbury TS, 2013,

    Magnetospheric “magic” frequencies as magnetopause surface eigenmodes

    , Geophysical Research Letters, Vol: 40, Pages: 5003-5008

    Abstract. The persistent so-called “magic” magnetospheric frequencies are thought to be either directly driven by monochromatic solar wind pressure fluctuations or resonantly excited global (cavity/waveguide) or magnetopause surface eigenmodes. We distinguish between these cases by statistically investigating, using simultaneous observations, the magnetospheric response to jets in the subsolar magnetosheath. The broadband jets do not exhibit discrete frequencies, but do drive waves at the discrete “magic” frequencies, with both direct and resonant driving. We show that the expected fundamental frequencies of magnetopause surface eigenmodes have two preferential values over a wide range of upstream conditions, corresponding to fast and slow solar wind, and that their harmonics are in good agreement with the “magic” frequencies. We also show that the waves are largely inconsistent with global modes outside the plasmasphere. Thus we conclude that these “magic” frequencies are most likely due to magnetopause surface eigenmodes.
  • Journal article
    Owens MJ, Forsyth RJ, 2013,

    The Heliospheric Magnetic Field

    , LIVING REVIEWS IN SOLAR PHYSICS, Vol: 10, ISSN: 2367-3648
  • Journal article
    Volwerk M, Andre N, Arridge CS, Jackman CM, Jia X, Milan SE, Radioti A, Vogt MF, Walsh AP, Nakamura R, Masters A, Forsyth Cet al., 2013,

    Comparative magnetotail flapping: an overview of selected events at Earth, Jupiter and Saturn

    , ANNALES GEOPHYSICAE, Vol: 31, Pages: 817-833, ISSN: 0992-7689
  • Conference paper
    Garrick-Bethell I, Lin RP, Sanchez H, Jaroux BA, Bester M, Brown P, Cosgrove D, Dougherty MK, Halekas JS, Hemingway D, Lozano PC, Martel F, Whitlock CWet al., 2013,

    Lunar magnetic field measurements with a cubesat

    , Conference on Sensors and Systems for Space Applications VI, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X
  • Conference paper
    Forman MA, Wicks RT, Horbury TS, Oughton Set al., 2013,

    Scaling Anisotropy of the Power in Parallel and Perpendicular Components of the Solar Wind Magnetic Field

    , 13th International Solar Wind Conference (Solar Wind), Publisher: AMER INST PHYSICS, Pages: 167-170, ISSN: 0094-243X
  • Conference paper
    Wicks RT, Matteini L, Horbury TS, Hellinger P, Roberts DAet al., 2013,

    Temperature anisotropy instabilities; combining plasma and magnetic field data at different distances from the Sun.

    , 13th International Solar Wind Conference (Solar Wind), Publisher: AMER INST PHYSICS, Pages: 303-306, ISSN: 0094-243X
  • Journal article
    Marlier ME, DeFries RS, Voulgarakis A, Kinney PL, Randerson JT, Shindell DT, Chen Y, Faluvegi Get al., 2013,

    El Nino and health risks from landscape fireemissions in southeast Asia

    , Nature Climate Change, Vol: 3, Pages: 131-136
  • Journal article
    Voulgarakis A, Naik V, Lamarque JF, Shindell DT, Young PJ, Prather MJ, Wild O, Field RF, Bergmann D, Cameron-Smith P, Cionni I, Collins WJ, Dalsøren SB, Doherty RM, Eyring V, Faluvegi G, Folberth GA, Horowitz LW, Josse B, McKenzie I, Nagashima T, Plummer DA, Righi M, Rumbold ST, Stevenson DS, Strode SA, Sudo K, Szopa S, Zeng Get al., 2013,

    Analysis of present day and future OH and methane lifetime in the ACCMIP simulations

    , Atmospheric Chemistry and Physics, Vol: 13, Pages: 2563-2587

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