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  • Journal article
    Chen CHK, Mallet A, Schekochihin AA, Horbury TS, Wicks RT, Bale SDet al., 2012,

    Three-Dimensional Structure of Solar Wind Turbulence

    , The Astrophysical Journal, Vol: 758, Pages: 120-120

    We present a measurement of the scale-dependent, three-dimensional structureof the magnetic field fluctuations in inertial range solar wind turbulence withrespect to a local, physically motivated coordinate system. The Alfvenicfluctuations are three-dimensionally anisotropic, with the sense of thisanisotropy varying from large to small scales. At the outer scale, the magneticfield correlations are longest in the local fluctuation direction, consistentwith Alfven waves. At the proton gyroscale, they are longest along the localmean field direction and shortest in the direction perpendicular to the localmean field and the local field fluctuation. The compressive fluctuations arehighly elongated along the local mean field direction, although axiallysymmetric perpendicular to it. Their large anisotropy may explain why they arenot heavily damped in the solar wind.
  • Journal article
    Ceppi P, Hwang Y-T, Frierson DMW, Hartmann DLet al., 2012,

    Southern Hemisphere jet latitude biases in CMIP5 models linked to shortwave cloud forcing

    , Geophysical Research Letters, Vol: 39, Pages: 1-5, ISSN: 0094-8276

    [1] Substantial biases in shortwave cloud forcing (SWCF) of up to ±30 W m−2are found in the midlatitudes of the Southern Hemisphere in the historical simulations of 34 CMIP5 coupled general circulation models. The SWCF biases are shown to induce surface temperature anomalies localized in the midlatitudes, and are significantly correlated with the mean latitude of the eddy‐driven jet, with a negative SWCF bias corresponding to an equatorward jet latitude bias. Aquaplanet model experiments are performed to demonstrate that the jet latitude biases are primarily induced by the midlatitude SWCF anomalies, such that the jet moves toward (away from) regions of enhanced (reduced) temperature gradients. The results underline the necessity of accurately representing cloud radiative forcings in state‐of‐the‐art coupled models.
  • Journal article
    Graven HD, Gruber N, Key R, Khatiwala S, Giraud Xet al., 2012,

    Changing controls on oceanic radiocarbon: New insights on shallow-to-deep ocean exchange and anthropogenic CO<sub>2</sub> uptake

    , JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, Vol: 117, ISSN: 2169-9275
  • Journal article
    Christophe B, Spilker LJ, Anderson JD, André N, Asmar SW, Aurnou J, Banfield D, Barucci A, Bertolami O, Bingham R, Brown P, Cecconi B, Courty J-M, Dittus H, Fletcher LN, Foulon B, Francisco F, Gil PJS, Glassmeier KH, Grundy W, Hansen C, Helbert J, Helled R, Hussmann H, Lamine B, Lämmerzahl C, Lamy L, Lehoucq R, Lenoir B, Levy A, Orton G, Páramos J, Poncy J, Postberg F, Progrebenko SV, Reh KR, Reynaud S, Robert C, Samain E, Saur J, Sayanagi KM, Schmitz N, Selig H, Sohl F, Spilker TR, Srama R, Stephan K, Touboul P, Wolf Pet al., 2012,

    OSS (Outer Solar System): a fundamental and planetary physics mission to Neptune, Triton and the Kuiper Belt

    , Experimental Astronomy, Vol: 34, Pages: 203-242, ISSN: 0922-6435
  • Journal article
    Tinetti G, Beaulieu JP, Henning T, Meyer M, Micela G, Ribas I, Stam D, Swain M, Krause O, Ollivier M, Pace E, Swinyard B, Aylward A, van Boekel R, Coradini A, Encrenaz T, Snellen I, Zapatero-Osorio MR, Bouwman J, Cho JY-K, du Foresto VC, Guillot T, Lopez-Morales M, Mueller-Wodarg I, Palle E, Selsis F, Sozzetti A, Ade PAR, Achilleos N, Adriani A, Agnor CB, Afonso C, Allende Prieto C, Bakos G, Barber RJ, Barlow M, Batista V, Bernath P, Bezard B, Borde P, Brown LR, Cassan A, Cavarroc C, Ciaravella A, Cockell C, Coustenis A, Danielski C, Decin L, De Kok R, Demangeon O, Deroo P, Doel P, Drossart P, Fletcher LN, Focardi M, Forget F, Fossey S, Fouque P, Frith J, Galand M, Gaulme P, Gonzalez Hernandez JI, Grasset O, Grassi D, Grenfell JL, Griffin MJ, Griffith CA, Groezinger U, Guedel M, Guio P, Hainaut O, Hargreaves R, Hauschildt PH, Heng K, Heyrovsky D, Hueso R, Irwin P, Kaltenegger L, Kervella P, Kipping D, Koskinen TT, Kovacs G, La Barbera A, Lammer H, Lellouch E, Leto G, Lopez Valverde MA, Lopez-Puertas M, Lovis C, Maggio A, Maillard JP, Maldonado Prado J, Marquette JB, Martin-Torres FJ, Maxted P, Miller S, Molinari S, Montes D, Moro-Martin A, Moses JI, Mousis O, Nguyen Tuong N, Nelson R, Orton GS, Pantin E, Pascale E, Pezzuto S, Pinfield D, Poretti E, Prinja R, Prisinzano L, Rees JM, Reiners A, Samuel B, Sanchez-Lavega A, Sanz Forcada J, Sasselov D, Savini G, Sicardy B, Smith A, Stixrude L, Strazzulla G, Tennyson J, Tessenyi M, Vasisht G, Vinatier S, Viti S, Waldmann I, White GJ, Widemann T, Wordsworth R, Yelle R, Yung Y, Yurchenko SNet al., 2012,

    EChO

    , EXPERIMENTAL ASTRONOMY, Vol: 34, Pages: 311-353, ISSN: 0922-6435
  • Journal article
    Orr A, Bracegirdle TJ, Hosking JS, Jung T, Haigh JD, Phillips T, Feng Wet al., 2012,

    Possible Dynamical Mechanisms for Southern Hemisphere Climate Change due to the Ozone Hole

    , JOURNAL OF THE ATMOSPHERIC SCIENCES, Vol: 69, Pages: 2917-2932, ISSN: 0022-4928
  • Journal article
    Graham DB, Cairns IH, Prabhakar DR, Ergun RE, Malaspina DM, Bale SD, Goetz K, Kellogg PJet al., 2012,

    Do Langmuir wave packets in the solar wind collapse?

    , JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380
    • Cite
    • Citations: 23
  • Journal article
    Hasegawa H, Zhang H, Lin Y, Sonnerup BUO, Schwartz SJ, Lavraud B, Zong Q-Get al., 2012,

    Magnetic flux rope formation within a magnetosheath hot flow anomaly

    , JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380
  • Journal article
    Cao H, Russell CT, Wicht J, Christensen UR, Dougherty MKet al., 2012,

    Saturn's high degree magnetic moments: Evidence for a unique planetary dynamo

    , ICARUS, Vol: 221, Pages: 388-394, ISSN: 0019-1035
  • Journal article
    Southwood D, 2012,

    When international partnerships go wrong

    , NATURE, Vol: 488, Pages: 451-453, ISSN: 0028-0836
  • Journal article
    Eastwood JP, Phan TD, Fear RC, Sibeck DG, Angelopoulos V, Oieroset M, Shay MAet al., 2012,

    Survival of flux transfer event (FTE) flux ropes far along the tail magnetopause

    , JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380
  • Journal article
    Carboni E, Thomas G, Sayer A, Siddans R, Poulsen C, Grainger R, Ahn C, Antoine D, Bevan S, Braak R, Brindley H, DeSouza-Machado S, Deuze J, Diner D, Ducos F, Grey W, Hsu C, Kalashnikova O, Kahn R, North P, Salustro C, Smith A, Tanre D, Torres O, Veihelmann Bet al., 2012,

    Intercomparison of desert dust optical depth from satellite measurements

    , Atmospheric Measurement Techniques, Vol: 5, Pages: 1973-2002

    This work provides a comparison of satellite retrievals of Saharan desert dust aerosol optical depth (AOD) during a strong dust event through March 2006. In this event, a large dust plume was transported over desert, vegetated, and ocean surfaces. The aim is to identify the differences between current datasets. The satellite instruments considered are AATSR, AIRS, MERIS, MISR, MODIS, OMI, POLDER, and SEVIRI. An interesting aspect is that the different algorithms make use of different instrument characteristics to obtain retrievals over bright surfaces. These include multi-angle approaches (MISR, AATSR), polarisation measurements (POLDER), single-view approaches using solar wavelengths (OMI, MODIS), and the thermal infrared spectral region (SEVIRI, AIRS). Differences between instruments, together with the comparison of different retrieval algorithms applied to measurements from the same instrument, provide a unique insight into the performance and characteristics of the various techniques employed. As well as the intercomparison between different satellite products, the AODs have also been compared to co-located AERONET data. Despite the fact that the agreement between satellite and AERONET AODs is reasonably good for all of the datasets, there are significant differences between them when compared to each other, especially over land. These differences are partially due to differences in the algorithms, such as assumptions about aerosol model and surface properties. However, in this comparison of spatially and temporally averaged data, it is important to note that differences in sampling, related to the actual footprint of each instrument on the heterogeneous aerosol field, cloud identification and the quality control flags of each dataset can be an important issue.
  • Journal article
    Klein KG, Howes GG, TenBarge JM, Bale SD, Chen CHK, Salem CSet al., 2012,

    Using Synthetic Spacecraft Data to Interpret Compressible Fluctuations in Solar Wind Turbulence

    , The Astrophysical Journal, Vol: 755, Pages: 159-159, ISSN: 0004-637X
  • Journal article
    Shindell DT, Voulgarakis A, Faluvegi G, Milly Get al., 2012,

    Precipitation response to regional radiative forcing

    , Atmospheric Chemistry and Physics, Vol: 12, Pages: 6969-6982
  • Journal article
    Andriopoulou M, Roussos E, Krupp N, Paranicas C, Thomsen M, Krimigis S, Dougherty MK, Glassmeier K-Het al., 2012,

    A noon-to-midnight electric field and nightside dynamics in Saturn's inner magnetosphere, using microsignature observations

    , ICARUS, Vol: 220, Pages: 503-513, ISSN: 0019-1035
    • Cite
    • Citations: 47
  • Journal article
    Simon S, Kriegel H, Saur J, Wennmacher A, Neubauer FM, Roussos E, Motschmann U, Dougherty MKet al., 2012,

    Analysis of Cassini magnetic field observations over the poles of Rhea

    , JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380
  • Journal article
    Ray LC, Galand M, Moore LE, Fleshman Bet al., 2012,

    Characterizing the limitations to the coupling between Saturn's ionosphere and middle magnetosphere

    , JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380
  • Journal article
    Chen CHK, Salem CS, Bonnell JW, Mozer FS, Bale SDet al., 2012,

    Density Fluctuation Spectrum of Solar Wind Turbulence between Ion and Electron Scales

    , Physical Review Letters, Vol: 109, Pages: 035001-035001, ISSN: 0031-9007
  • Journal article
    Erdos G, Balogh A, 2012,

    MAGNETIC FLUX DENSITY MEASURED IN FAST AND SLOW SOLAR WIND STREAMS

    , ASTROPHYSICAL JOURNAL, Vol: 753, ISSN: 0004-637X
    • Cite
    • Citations: 13
  • Journal article
    Simpson IR, Blackburn M, Haigh JD, 2012,

    A Mechanism for the Effect of Tropospheric Jet Structure on the Annular Mode-Like Response to Stratospheric Forcing

    , JOURNAL OF THE ATMOSPHERIC SCIENCES, Vol: 69, Pages: 2152-2170, ISSN: 0022-4928
  • Journal article
    Martinez-Oliveros JC, Lindsey C, Bale SD, Krucker Set al., 2012,

    Determination of Electromagnetic Source Direction as an Eigenvalue Problem

    , SOLAR PHYSICS, Vol: 279, Pages: 153-171, ISSN: 0038-0938
  • Journal article
    Chan N, Young T, Brindley H, Ekins-Daukes N, Araki K, Kemmoku Y, Yamaguchi Met al., 2012,

    Validation of energy prediction method for a concentrator photovoltaic module in Toyohashi Japan

    , Progress in Photovoltaics, Pages: n/a-n/a

    III–V concentrator photovoltaic systems attain high efficiency through the use of series connected multi-junction solar cells. As these solar cells absorb over distinct bands over the solar spectrum, they have a more complex response to real illumination conditions than conventional silicon solar cells. Estimates for annual energy yield made assuming fixed reference spectra can vary by up to 15% depending on the assumptions made. Using a detailed computer simulation, the behaviour of a 20-cell InGaP/In0.01GaAs/Ge multi-junction concentrator system was simulated in 5-min intervals over an entire year, accounting for changes in direct normal irradiance, humidity, temperature and aerosol optical depth. The simulation was compared with concentrator system monitoring data taken over the same period and excellent agreement (within 2%) in the annual energy yield was obtained. Air mass, aerosol optical depth and precipitable water have been identified as atmospheric parameters with the largest impact on system efficiency.
  • Journal article
    Cargill PJ, Bradshaw SJ, Klimchuk JA, 2012,

    ENTHALPY-BASED THERMAL EVOLUTION OF LOOPS. II. IMPROVEMENTS TO THE MODEL

    , ASTROPHYSICAL JOURNAL, Vol: 752, ISSN: 0004-637X
  • Journal article
    Howes GG, Bale SD, Klein KG, Chen CHK, Salem CS, TenBarge JMet al., 2012,

    The Slow-Mode Nature of Compressible Wave Power in Solar Wind Turbulence

    , The Astrophysical Journal Letters, Vol: 753, Pages: L19-L19, ISSN: 2041-8205
  • Journal article
    Green PD, Newman SM, Beeby RJ, Murray JE, Pickering JC, Harries JEet al., 2012,

    Recent advances in measurement of the water vapour continuum in the far-infrared spectral region

    , PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, Vol: 370, Pages: 2637-2655, ISSN: 1364-503X
  • Journal article
    O'Reilly CH, Czaja A, LaCasce JH, 2012,

    The emergence of zonal ocean jets under large-scale stochastic wind forcing

    , GEOPHYSICAL RESEARCH LETTERS, Vol: 39, ISSN: 0094-8276
  • Journal article
    Richter I, Auster HU, Glassmeier KH, Koenders C, Carr CM, Motschmann U, Mueller J, McKenna-Lawlor Set al., 2012,

    Magnetic field measurements during the ROSETTA flyby at asteroid (21)Lutetia

    , PLANETARY AND SPACE SCIENCE, Vol: 66, Pages: 155-164, ISSN: 0032-0633
  • Journal article
    Morse AD, Altwegg K, Andrews DJ, Auster HU, Carr CM, Galand M, Goesmann F, Gulkis S, Lee S, Richter I, Sheridan S, Stern SA, A'Hearn MF, Feldman P, Parker J, Retherford KD, Weaver HA, Wright IPet al., 2012,

    The Rosetta campaign to detect an exosphere at Lutetia

    , PLANETARY AND SPACE SCIENCE, Vol: 66, Pages: 165-172, ISSN: 0032-0633
  • Journal article
    Luhmann JG, Ulusen D, Ledvina SA, Mandt K, Magee B, Waite JH, Westlake J, Cravens TE, Robertson I, Edberg N, Agren K, Wahlund J-E, Ma Y-J, Wei H, Russell CT, Dougherty MKet al., 2012,

    Investigating magnetospheric interaction effects on Titan's ionosphere with the Cassini orbiter Ion Neutral Mass Spectrometer, Langmuir Probe and magnetometer observations during targeted flybys

    , ICARUS, Vol: 219, Pages: 534-555, ISSN: 0019-1035
  • Journal article
    Archer MO, Horbury TS, Eastwood JP, 2012,

    Magnetosheath pressure pulses: Generation downstream of the bow shock from solar wind discontinuities

    , Journal of Geophyical Research, Vol: 117, ISSN: 0148-0227

    We present multipoint Time History of Events and Macroscale Interactions duringSubstorms (THEMIS) observations of transient dynamic pressure pulses in themagnetosheath 3–10 times the background in amplitude, due to enhancements in both theion density and velocity. Their spatial dimensions are of the order of 1 RE parallel tothe flow and 0.2–0.5 RE perpendicular to it, inferred from the difference in theamplitudes observed by the different spacecraft. For the first time, simultaneousobservations of the solar wind and foreshock are also shown, proving no similar dynamicpressure enhancements exist upstream of the bow shock and that the majority of pulsesare downstream of the quasi-parallel shock. By considering previously suggestedmechanisms for their generation, we show that the pressure pulses cannot be caused byreconnection, hot flow anomalies, or short, large-amplitude magnetic structures andthat at least some of the pressure pulses appear to be consistent with previoussimulations of solar wind discontinuities interacting with the bow shock. Thesesimulations predict large-amplitude pulses when the local geometry of the shock changesfrom quasi-perpendicular to quasi-parallel, while the opposite case should also producenotable pulses but typically of lower amplitude. Therefore, in a given region of themagnetosheath, some of the discontinuities in the solar wind should generate pressurepulses, whereas others are expected not to. There is also evidence that the pulses canimpinge upon the magnetopause, causing its motion.

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