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Journal articleArcher MO, Hartinger MD, Horbury TS, 2013,
Magnetospheric “magic” frequencies as magnetopause surface eigenmodes
, Geophysical Research Letters, Vol: 40, Pages: 5003-5008Abstract. 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.
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Journal articleGraven HD, Xu X, Guilderson TP, et 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- Author Web Link
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- Citations: 7
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Book chapterSolanki 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- Author Web Link
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- Citations: 193
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Journal articleDhomse SS, Chipperfield MP, Feng W, et 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- Author Web Link
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- Citations: 21
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Journal articleStallard TS, Masters A, Miller S, et al., 2012,
Saturn's auroral/polar H<sub>3</sub><SUP>+</SUP> infrared emission: The effect of solar wind compression
, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380- Author Web Link
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- Citations: 19
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Conference paperYoon S, Kim V, Yun J, et al., 2012,
Operations for two spacecraft of triple-cubesat mission trio-cinema with a single rf chain
, Pages: 4240-4245, ISSN: 0074-1795TRiplet Ionospheric Observatory - Cubesat for Ion, Neutral, Electron and MAgnetic fields (TRIO-CINEMA) mission consists of three identical 3U cubesats for scientific observation. The TRIO-CINEMA mission will provide high sensitivity mapping and high cadence measurements of ring current Energetic Neutral Atom (ENA) in the range of 4 - 200 keV with 1 keV FWHM energy resolution in Low Earth Orbit (LEO). Each spacecraft is equipped with a Supra Thermal Electrons, Ions, Neutrals (STEIN) instrument and a MAGnetometer Imperial College (MAGIC) instrument. STEIN instrument is improved from those in SupraThermal Electron (STE) instrument flown on NASA's Solar TERrestrial Relations Observatory (STEREO) spacecraft and is capable of identifying electrons, positive ions and neutrals through the application of an electric field in the entrance aperture. MAGIC is dual 3-axis magnetoresistive sensor for attitude control and scientific measurement. First spacecraft of TRIO-CINEMA is developed and will be operated by Space Science Laboratory of University of California, Berkeley (UCB). Another two spacecraft are developed by Kyung Hee University (KHU) in Republic of Korea. TRIO-CINEMA is expected to provide stereo imaging of ENAs and multi-point measurements of ions, electrons and Earth magnetic fields. It is also expected that the TRIO-CINEMA measurements will complement the measurements with NASA's Radiation Belt Storm Probes (RBSP) mission by stereo imaging of the ring current through ENA measurements at low altitudes. TRIO-CINEMA data will be transmitted at 1 Mbps via S-band, whereas a UHF receiver is used for uplink communication. UCB will operate the mission via Mission Operations Center (MOC) and Berkeley Ground Station (BGS) of Space Science Laboratory (SSL). KHU has constructed a new ground station with one UHF RF system for uplink. The two KHU's spacecraft will be initially contiguous with each other deployed from the same launcher. Because the ground S-band antenna can prov
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Journal articleScherrer SC, Ceppi P, Croci-Maspoli M, et al., 2012,
Snow-albedo feedback and Swiss spring temperature trends
, Theoretical and Applied Climatology, Vol: 110, Pages: 509-516, ISSN: 0177-798XWe quantify the effect of the snow-albedo feedback on Swiss spring temperature trends using daily temperature and snow depth measurements from six station pairs for the period 1961–2011. We show that the daily mean 2-m temperature of a spring day without snow cover is on average 0.4 °C warmer than one with snow cover at the same location. This estimate is comparable with estimates from climate modelling studies. Caused by the decreases in snow pack, the snow-albedo feedback amplifies observed temperature trends in spring. The influence is small and confined to areas around the upward-moving snow line in spring and early summer. For the 1961–2011 period, the related temperature trend increases are in the order of 3–7 % of the total observed trend.
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Journal articleLandi S, Matteini L, Pantellini F, 2012,
ON THE COMPETITION BETWEEN RADIAL EXPANSION AND COULOMB COLLISIONS IN SHAPING THE ELECTRON VELOCITY DISTRIBUTION FUNCTION: KINETIC SIMULATIONS
, ASTROPHYSICAL JOURNAL, Vol: 760, ISSN: 0004-637X- Author Web Link
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- Citations: 48
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Journal articleLi P, Fu G, Lu C, et al., 2012,
The Formation Mechanism of a Spring Sea Fog Event over the Yellow Sea Associated with a Low-Level Jet
, WEATHER AND FORECASTING, Vol: 27, Pages: 1538-1553, ISSN: 0882-8156- Author Web Link
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- Citations: 16
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Journal articleHausmann U, Czaja A, 2012,
The observed signature of mesoscale eddies in sea surface temperature and the associated heat transport
, DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, Vol: 70, Pages: 60-72, ISSN: 0967-0637- Author Web Link
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- Citations: 99
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Journal articleCui J, Yelle RV, Strobel DF, et al., 2012,
The CH<sub>4</sub> structure in Titan's upper atmosphere revisited
, JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, Vol: 117, ISSN: 2169-9097- Author Web Link
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- Citations: 44
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Journal articleShen C, Rong ZJ, Dunlop MW, et al., 2012,
Spatial gradients from irregular, multiple-point spacecraft configurations
, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380- Author Web Link
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- Citations: 27
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Journal articleMoore L, Fischer G, Mueller-Wodarg I, et al., 2012,
Diurnal variation of electron density in Saturn's ionosphere: Model comparisons with Saturn Electrostatic Discharge (SED) observations
, ICARUS, Vol: 221, Pages: 508-516, ISSN: 0019-1035- Author Web Link
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- Citations: 11
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Journal articleGryspeerdt E, Stier P, 2012,
Regime-based analysis of aerosol-cloud interactions
, GEOPHYSICAL RESEARCH LETTERS, Vol: 39, ISSN: 0094-8276- Author Web Link
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- Citations: 63
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Journal articleMatteini L, Hellinger P, Landi S, et al., 2012,
Ion Kinetics in the Solar Wind: Coupling Global Expansion to Local Microphysics
, Space Science Reviews, Vol: 172, Pages: 373-396, ISSN: 0038-6308 -
Journal articleCargill PJ, Vlahos L, Baumann G, et al., 2012,
Current Fragmentation and Particle Acceleration in Solar Flares
, SPACE SCIENCE REVIEWS, Vol: 173, Pages: 223-245, ISSN: 0038-6308- Author Web Link
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- Citations: 54
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Journal articleBalogh A, Bykov A, Lin R, et al., 2012,
Cosmic Plasmas and Particle Acceleration: An Introduction
, SPACE SCIENCE REVIEWS, Vol: 173, Pages: 1-4, ISSN: 0038-6308- Author Web Link
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- Citations: 3
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Journal articleMoestl C, Farrugia CJ, Kilpua EKJ, et al., 2012,
MULTI-POINT SHOCK AND FLUX ROPE ANALYSIS OF MULTIPLE INTERPLANETARY CORONAL MASS EJECTIONS AROUND 2010 AUGUST 1 IN THE INNER HELIOSPHERE
, ASTROPHYSICAL JOURNAL, Vol: 758, ISSN: 0004-637X- Author Web Link
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- Citations: 93
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Journal articleCargill PJ, Bradshaw SJ, Klimchuk JA, 2012,
ENTHALPY-BASED THERMAL EVOLUTION OF LOOPS. III. COMPARISON OF ZERO-DIMENSIONAL MODELS
, ASTROPHYSICAL JOURNAL, Vol: 758, ISSN: 0004-637X- Author Web Link
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- Citations: 54
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Journal articleChen CHK, Mallet A, Schekochihin AA, et al., 2012,
Three-Dimensional Structure of Solar Wind Turbulence
, The Astrophysical Journal, Vol: 758, Pages: 120-120We 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.
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Journal articleCeppi P, Hwang Y-T, Frierson DMW, et 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.
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Journal articleGraven HD, Gruber N, Key R, et 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- Author Web Link
- Open Access Link
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- Citations: 90
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Journal articleChristophe B, Spilker LJ, Anderson JD, et 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 articleTinetti G, Beaulieu JP, Henning T, et al., 2012,
EChO
, EXPERIMENTAL ASTRONOMY, Vol: 34, Pages: 311-353, ISSN: 0922-6435- Author Web Link
- Open Access Link
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- Citations: 102
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Journal articleOrr A, Bracegirdle TJ, Hosking JS, et 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- Author Web Link
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- Citations: 25
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Journal articleGraham DB, Cairns IH, Prabhakar DR, et al., 2012,
Do Langmuir wave packets in the solar wind collapse?
, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380- Author Web Link
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- Citations: 21
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Journal articleHasegawa H, Zhang H, Lin Y, et al., 2012,
Magnetic flux rope formation within a magnetosheath hot flow anomaly
, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380- Author Web Link
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- Citations: 20
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Journal articleStawarz JE, Pouquet A, Brachet M-E, 2012,
Long-time properties of magnetohydrodynamic turbulence and the role of symmetries
, PHYSICAL REVIEW E, Vol: 86, ISSN: 1539-3755- Author Web Link
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- Citations: 12
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Journal articleCao H, Russell CT, Wicht J, et al., 2012,
Saturn's high degree magnetic moments: Evidence for a unique planetary dynamo
, ICARUS, Vol: 221, Pages: 388-394, ISSN: 0019-1035- Author Web Link
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- Citations: 32
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Journal articleFu D, Wang S, Chen D, et al., 2012,
Comparison study between observation and simulation for sea fog over the Yellow Sea in May 2009
, JOURNAL OF OCEAN UNIVERSITY OF CHINA, Vol: 11, Pages: 290-300, ISSN: 1671-2463
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