Since Thanksgiving was last week, it was a relatively slow week in the AGU publications department. Just two papers of interest this week.
Glassmeier, K.-H., H.-U. Auster, and U. Motschmann (2007), A feedback dynamo generating Mercury's magnetic field, GRL 34, L22201.
Podesta, J. J. (2007), Self-similar scaling of kinetic energy density in the inertial range of solar wind turbulence, JGR 112. A11104.
Monday, November 26, 2007
Tuesday, November 20, 2007
Congratulations, Dr. Brian May
Brian May, who took 35 years off during grad school as a rock star, has been named chancellor of Liverpool John Moores University.
(via Annals of Improbable Research)
(via Annals of Improbable Research)
First snow
It's snowing this morning. NWS forecasts 1-3 inches accumulation with possible sleet and freezing rain mixed in.
Monday, November 19, 2007
Additions to the pile: Week of 19 November 2007
Just two papers last week:
Kataoka, R., N. Nishitani, Y. Ebihara, K. Hosokawa, T. Ogawa, T. Kikuchi, and Y. Miyoshi (2007), Dynamic variations of a convection flow reversal in the subauroral postmidnight sector as seen by the SuperDARN Hokkaido HF radar, GRL 34, L21105.
Russell, A. T., J.-P. St.-Maurice, R. J. Sica, and J.-M. Noël (2007), Composition changes during disturbed conditions: Are mass spectrometers overestimating the concentrations of atomic oxygen?, GRL 34, L21106.
Kataoka, R., N. Nishitani, Y. Ebihara, K. Hosokawa, T. Ogawa, T. Kikuchi, and Y. Miyoshi (2007), Dynamic variations of a convection flow reversal in the subauroral postmidnight sector as seen by the SuperDARN Hokkaido HF radar, GRL 34, L21105.
Russell, A. T., J.-P. St.-Maurice, R. J. Sica, and J.-M. Noël (2007), Composition changes during disturbed conditions: Are mass spectrometers overestimating the concentrations of atomic oxygen?, GRL 34, L21106.
Tuesday, November 13, 2007
Additions to the pile: Week of 12 November 2007
It's been a while since my last trip, so the pile of papers to be read is growing. Here's the latest batch:
Winglee, R. M., and E. M. Harnett (2007), Radiation mitigation at the Moon by the terrestrial magnetosphere, GRL 34, L21103.
Bertucci, C., F. M. Neubauer, K. Szego, J.-E. Wahlund, A. J. Coates, M. K. Dougherty, D. T. Young, and W. S. Kurth (2007), Structure of Titan's mid-range magnetic tail: Cassini magnetometer observations during the T9 flyby, GRL 34, L24S02.
Szego, K., Z. Bebesi, C. Bertucci, A. J. Coates, F. J. Crary, G. Erdos, R. Hartle, E. C. Sittler, and D. T. Young (2007), Charged particle environment of Titan during the T9 flyby, GRL 34, L24S03.
Fuselier, S. A., S. M. Petrinec, K. J. Trattner, M. Fujimoto, and H. Hasegawa (2007), Simultaneous observations of fluctuating cusp aurora and low-latitude magnetopause reconnection, JGR 112, A11207.
Winglee, R. M., and E. M. Harnett (2007), Radiation mitigation at the Moon by the terrestrial magnetosphere, GRL 34, L21103.
Bertucci, C., F. M. Neubauer, K. Szego, J.-E. Wahlund, A. J. Coates, M. K. Dougherty, D. T. Young, and W. S. Kurth (2007), Structure of Titan's mid-range magnetic tail: Cassini magnetometer observations during the T9 flyby, GRL 34, L24S02.
Szego, K., Z. Bebesi, C. Bertucci, A. J. Coates, F. J. Crary, G. Erdos, R. Hartle, E. C. Sittler, and D. T. Young (2007), Charged particle environment of Titan during the T9 flyby, GRL 34, L24S03.
Fuselier, S. A., S. M. Petrinec, K. J. Trattner, M. Fujimoto, and H. Hasegawa (2007), Simultaneous observations of fluctuating cusp aurora and low-latitude magnetopause reconnection, JGR 112, A11207.
Oops!
The people who are scanning the skies for asteroids with the potential for colliding with Earth found an object 2007VN84, which they found would approach within 12,000 km of the Earth's center. Naturally, they put out an alert.
The object in question turns out to be man-made. It's the Rosetta spacecraft, swinging by Earth en route to comet Churyumov-Gerasimenko.
Belatedly, somebody thought to check the orbital elements against the Satellite Situation Center. The Minor Planet Electronic Circular blames the mixup on the lack of a comprehensive publicly available database of man-made objects in space.
(h/t Steinn Sigurdsson)
The object in question turns out to be man-made. It's the Rosetta spacecraft, swinging by Earth en route to comet Churyumov-Gerasimenko.
Belatedly, somebody thought to check the orbital elements against the Satellite Situation Center. The Minor Planet Electronic Circular blames the mixup on the lack of a comprehensive publicly available database of man-made objects in space.
(h/t Steinn Sigurdsson)
Friday, November 9, 2007
Define the Universe. Give 10500 examples
I've just finished Lee Smolin's book The Trouble with Physics. The book covers the recent (1980-2005) history of theoretical physics, with emphasis on string theory, and discusses some of the reasons for the lack of progress in fundamental physics during that period.
The problem is not thatthere have been no advances, per se. The problem is that there has been a disconnect between theory and experiment. String theory has been the dominant approach since the mid 1980s, but during that time it has never made a prediction that was both new and testable. The currently fashionable explanation for why string theory does not make testable predictions is that our universe is just one possible universe in a landscape of 10500 universes. That's a very big number: consider that the observable universe has "only" ~1080 protons. If we were to envision each proton as a mini-universe containing that many mini-protons, and repeat this construction for six iterations, we would still be short by a factor of 100 quintillion of the number of possible universes in the landscape.
This is science?! It sounds at least as much like a sick and twisted version of the infamous apocryphal final exam question, "Define the Universe. Give three examples."
The problems Smolin identifies are not unique to physics. As he correctly notes, the peer review system is well equipped for making incremental advances in science, but it is designed in such a way that its mistakes will be conservative mistakes. The next Einstein is unlikely to hold a tenure track faculty position at the time he makes his key advances in fundamental theory. For that matter, the real Einstein did not, either: he was a patent clerk in Switzerland in 1905, when he published the three papers that shook the foundations of physics.
My own field of space physics has long been suffering from a disconnect between theory and experiment. But at least there are doable experiments that can falsify some of the theories, and one of the leading drivers of mission selection is the need to address the predictions of theorists.
The problem is not thatthere have been no advances, per se. The problem is that there has been a disconnect between theory and experiment. String theory has been the dominant approach since the mid 1980s, but during that time it has never made a prediction that was both new and testable. The currently fashionable explanation for why string theory does not make testable predictions is that our universe is just one possible universe in a landscape of 10500 universes. That's a very big number: consider that the observable universe has "only" ~1080 protons. If we were to envision each proton as a mini-universe containing that many mini-protons, and repeat this construction for six iterations, we would still be short by a factor of 100 quintillion of the number of possible universes in the landscape.
This is science?! It sounds at least as much like a sick and twisted version of the infamous apocryphal final exam question, "Define the Universe. Give three examples."
The problems Smolin identifies are not unique to physics. As he correctly notes, the peer review system is well equipped for making incremental advances in science, but it is designed in such a way that its mistakes will be conservative mistakes. The next Einstein is unlikely to hold a tenure track faculty position at the time he makes his key advances in fundamental theory. For that matter, the real Einstein did not, either: he was a patent clerk in Switzerland in 1905, when he published the three papers that shook the foundations of physics.
My own field of space physics has long been suffering from a disconnect between theory and experiment. But at least there are doable experiments that can falsify some of the theories, and one of the leading drivers of mission selection is the need to address the predictions of theorists.
Tuesday, November 6, 2007
Tap tap tap
Is this thing on?
I got two cites from a recent review paper (added to the pile):
Moore, T. E., and J. L. Horwitz (2007), Stellar ablation of planetary atmospheres, Rev. Geophys. 45, 3002.
I got two cites from a recent review paper (added to the pile):
Moore, T. E., and J. L. Horwitz (2007), Stellar ablation of planetary atmospheres, Rev. Geophys. 45, 3002.
Wednesday, September 19, 2007
Additions to the pile: Week of 17 September 2007
Papers of interest in AGU journals last week:
Chapman, S. C., and B. Hnat (2007), Quantifying scaling in the velocity field of the anisotropic turbulent solar wind, GRL 34, L17103.
Eastwood, J. P., S. D. Bale, F. S. Mozer, and A. J. Hull (2007), Contributions to the cross shock electric field at a quasiperpendicular collisionless shock, GRL 34, L17104.
Zong, Q.-G., X.-Z. Zhou, X. Li, P. Song, S. Y. Fu, D. N. Baker, Z. Y. Pu, T. A. Fritz, P. Daly, A. Balogh, and H. Réme (2007), Correction to "Ultralow frequency modulation of energetic particles in the dayside magnetosphere," GRL 34, L17106. The original reference is GRL 34, L12105, 2007.
Horne, R. B., R. M. Thorne, S. A. Glauert, N. P. Meredith, D. Pokhotelov, and O. Santolík (2007), Electron acceleration in the Van Allen radiation belts by fast magnetosonic waves, GRL 34, L17107.
Mende, S. B., V. Angelopoulos, H. U. Frey, S. Harris, E. Donovan, B. Jackel, M. Syrjaesuo, C. T. Russell, and I. Mann (2007), Determination of substorm onset timing and location using the THEMIS ground based observatories, GRL 34, L17108.
Cully, C. M., R. E. Ergun, and A. I. Eriksson (2007), Electrostatic structure around spacecraft in tenuous plasmas, JGR 112, A09211.
Chapman, S. C., and B. Hnat (2007), Quantifying scaling in the velocity field of the anisotropic turbulent solar wind, GRL 34, L17103.
Eastwood, J. P., S. D. Bale, F. S. Mozer, and A. J. Hull (2007), Contributions to the cross shock electric field at a quasiperpendicular collisionless shock, GRL 34, L17104.
Zong, Q.-G., X.-Z. Zhou, X. Li, P. Song, S. Y. Fu, D. N. Baker, Z. Y. Pu, T. A. Fritz, P. Daly, A. Balogh, and H. Réme (2007), Correction to "Ultralow frequency modulation of energetic particles in the dayside magnetosphere," GRL 34, L17106. The original reference is GRL 34, L12105, 2007.
Horne, R. B., R. M. Thorne, S. A. Glauert, N. P. Meredith, D. Pokhotelov, and O. Santolík (2007), Electron acceleration in the Van Allen radiation belts by fast magnetosonic waves, GRL 34, L17107.
Mende, S. B., V. Angelopoulos, H. U. Frey, S. Harris, E. Donovan, B. Jackel, M. Syrjaesuo, C. T. Russell, and I. Mann (2007), Determination of substorm onset timing and location using the THEMIS ground based observatories, GRL 34, L17108.
Cully, C. M., R. E. Ergun, and A. I. Eriksson (2007), Electrostatic structure around spacecraft in tenuous plasmas, JGR 112, A09211.
Monday, September 10, 2007
Additions to the pile: Week of 10 September 2007
Papers of interest in AGU journals last week:
Sandel, B. R. and M. H. Denton (2007), Global view of refilling the plasmasphere, GRL 34, L17102.
Brain, D. A., R. J. Lillis, D. L. Mitchell, J. S. Halekas, and R. P. Lin (2007), Electron pitch angle distriburions as indicators of magnetic field topology near Mars, JGR 112, A09201.
Newell, P. T., S. Wing, and F. J. Rich (2007), Cusp for high and low merging rates, JGR 112, A09205.
Liang, J., and W. W. Liu (2007), A MHD mechanism for the generation of the meridional current system dirung substorm expansion phase, JGR 112, A09208.
Seyler, C. E., and K. Liu (2007), Particle energization by oblique inertial Alfvén waves in the auroral region, JGR 112, A09302.
Lessard, M. R., W. Lotko, J. LaBelle, W. Peria, C. W. Carlson, F. Creutzberg, and D. D. Wallis (2007), Ground and satellite observations of the evolution of growth phase auroral arcs, JGR 112, A09304.
Sandel, B. R. and M. H. Denton (2007), Global view of refilling the plasmasphere, GRL 34, L17102.
Brain, D. A., R. J. Lillis, D. L. Mitchell, J. S. Halekas, and R. P. Lin (2007), Electron pitch angle distriburions as indicators of magnetic field topology near Mars, JGR 112, A09201.
Newell, P. T., S. Wing, and F. J. Rich (2007), Cusp for high and low merging rates, JGR 112, A09205.
Liang, J., and W. W. Liu (2007), A MHD mechanism for the generation of the meridional current system dirung substorm expansion phase, JGR 112, A09208.
Seyler, C. E., and K. Liu (2007), Particle energization by oblique inertial Alfvén waves in the auroral region, JGR 112, A09302.
Lessard, M. R., W. Lotko, J. LaBelle, W. Peria, C. W. Carlson, F. Creutzberg, and D. D. Wallis (2007), Ground and satellite observations of the evolution of growth phase auroral arcs, JGR 112, A09304.
Thursday, September 6, 2007
Alfvén waves in the solar corona
The current issue of Science (I read the dead tree version) has an article reporting observations of Alfvén waves in the solar corona. The abstract:
The reference is S. Tomczyk et al. (2007), Science 317, 1192.
There is substantial in situ evidence, of which Tomczyk et al. appear to be unaware (their paper does not cite any of the magnetospheric literature), that Alfvén waves contribute to heating of ionospheric plasma in the auroral acceleration region (see, e.g., G. Paschmann et al. (2002), Space Science Reviews 103, 1.
Alfvén waves, transverse incompressible magnetic oscillations, have been proposed as a possible mechanism to heat the Sun's corona to millions of degrees by transporting convective energy from the photosphere into the diffuse corona. We report the detection of Alfvén waves in intensity, line-of-sight velocity, and linear polarization images of the solar corona taken using the FeXIII 1074.7-nanometer coronal emission line with the Coronal Multi-Channel Polarimeter (CoMP) instrument at the National Solar Observatory, New Mexico. Ubiquitous upward propagating waves were seen, with phase speeeds of 1 to 4 megameters per second and trajectories consistent with the direction of the magnetic field inferred from the linear polarization measurements. An estimate of the energy carried by the waves that we spatially resolved indicates that they are too weak to heat the solar corona; however, unresolved Alfvén waves may carry sufficient energy.
The reference is S. Tomczyk et al. (2007), Science 317, 1192.
There is substantial in situ evidence, of which Tomczyk et al. appear to be unaware (their paper does not cite any of the magnetospheric literature), that Alfvén waves contribute to heating of ionospheric plasma in the auroral acceleration region (see, e.g., G. Paschmann et al. (2002), Space Science Reviews 103, 1.
Tuesday, September 4, 2007
Additions to the pile: Week of 3 September 2007
Papers of interest in AGU journals in the last week:
Vedin, J., K. Rönnmark, C. Bunescu, and O. Marghitu (2007), Estimating properties of concentrated parallel electric fields from electron velocity distributions, GRL 34, L16107.
Malova, H. V., L. M> Zelenyi, V. Y. Popov, D. C. Delcourt, A. A. Petrukovich, and A. V. Runov (2007), Asymmetric thin current sheets in the Earth's magnetotail, GRL 34, L16108.
Saito, S. and T. Maruyama (2007), Large-scale longitudinal variation in ionospheric height and equatorial spread F occurrences observded by ionosondes, GRL 34, L16109.
Wing, S., J. W. Gjerloev, J. R. Johnson, and R. A. Hoffman (2007), Substorm plasma sheet ion pressure profiles, GRL 34, L16110.
Katoh, Y., and Y. Omura (2007), Correction to "Relativistic particle acceleration in the process of whistler-mode chorus wave generation", GRL 34, L17101. The original reference is GRL 34, L13102.
Heelis, R. A., and W. R. Coley (2007), Variations in the low- and mid-latitude topside ion concentration observed by DMSP during superstorm events, JGR 112, A08310.
Vedin, J., K. Rönnmark, C. Bunescu, and O. Marghitu (2007), Estimating properties of concentrated parallel electric fields from electron velocity distributions, GRL 34, L16107.
Malova, H. V., L. M> Zelenyi, V. Y. Popov, D. C. Delcourt, A. A. Petrukovich, and A. V. Runov (2007), Asymmetric thin current sheets in the Earth's magnetotail, GRL 34, L16108.
Saito, S. and T. Maruyama (2007), Large-scale longitudinal variation in ionospheric height and equatorial spread F occurrences observded by ionosondes, GRL 34, L16109.
Wing, S., J. W. Gjerloev, J. R. Johnson, and R. A. Hoffman (2007), Substorm plasma sheet ion pressure profiles, GRL 34, L16110.
Katoh, Y., and Y. Omura (2007), Correction to "Relativistic particle acceleration in the process of whistler-mode chorus wave generation", GRL 34, L17101. The original reference is GRL 34, L13102.
Heelis, R. A., and W. R. Coley (2007), Variations in the low- and mid-latitude topside ion concentration observed by DMSP during superstorm events, JGR 112, A08310.
Monday, August 27, 2007
Additions to the pile: Week of 27 August 2007
A slowdown due to summer vacations? Only one GRL in the last week, and three JGRs in the last two weeks.
Kuritsyn, A., H. Ji, S. P. Gerhardt, Y. Ren, and M. Yamada (2007), Effects of global boundary and local collisionality on magnetic reconnection in a laboratory plasma, GRL 34, L16106.
Hollweg, J. V., and P. A. Isenberg (2007), Reflection of Alfvén waves in the corona and solar wind: An impulse function approach, JGR 112, A08102.
Gosling, J. T., S. Eriksson, D. J. McComas, T. D. Phan, and R. M. Skoug (2007), Multiple magnetic reconnection sites associated with a coronal mass ejection in the solar wind, JGR 112, A08106.
Frederick-Frost, K. M., K. A. Lynch, P. M. Kintner, E. Klatt, D. Lorentzen, J. Moen, Y. Ogawa, and M. Widholm (2007), SERSIO: Swalbard EISCAT rocket study of ion outflows, JGR 112, A08307.
Kuritsyn, A., H. Ji, S. P. Gerhardt, Y. Ren, and M. Yamada (2007), Effects of global boundary and local collisionality on magnetic reconnection in a laboratory plasma, GRL 34, L16106.
Hollweg, J. V., and P. A. Isenberg (2007), Reflection of Alfvén waves in the corona and solar wind: An impulse function approach, JGR 112, A08102.
Gosling, J. T., S. Eriksson, D. J. McComas, T. D. Phan, and R. M. Skoug (2007), Multiple magnetic reconnection sites associated with a coronal mass ejection in the solar wind, JGR 112, A08106.
Frederick-Frost, K. M., K. A. Lynch, P. M. Kintner, E. Klatt, D. Lorentzen, J. Moen, Y. Ogawa, and M. Widholm (2007), SERSIO: Swalbard EISCAT rocket study of ion outflows, JGR 112, A08307.
Tuesday, August 21, 2007
Off to Berkeley
I'm headed to a science working team meeting at UC Berkeley for the FAST satellite, and I'll be gone the rest of the week.
Additions to the pile: Week of 20 August 2007
AGU's website was getting hammered yesterday, so I only checked GRL.
Bortnik, J., R. M. Thorne, N. P. Meredith, and O. Santolik (2007), Ray tracing of penetrating chorus and its implications for the radiation belts, GRL 34, L15109.
Gosling, J. T., T. D. Phan, R. P. Lin, and A. Szabo (2007), Prevalence of magnetic reconnection at small field shear angles in the solar wind, GRL 34, L15110.
Vennerstrom, S., F. Christiansen, N. Olsen, and T. Moretto (2007), On the cause of IMF By related mid- and low latitude magnetic disturbances, GRL 34, L16101.
Bortnik, J., R. M. Thorne, N. P. Meredith, and O. Santolik (2007), Ray tracing of penetrating chorus and its implications for the radiation belts, GRL 34, L15109.
Gosling, J. T., T. D. Phan, R. P. Lin, and A. Szabo (2007), Prevalence of magnetic reconnection at small field shear angles in the solar wind, GRL 34, L15110.
Vennerstrom, S., F. Christiansen, N. Olsen, and T. Moretto (2007), On the cause of IMF By related mid- and low latitude magnetic disturbances, GRL 34, L16101.
Tuesday, August 14, 2007
I do not think that word means what you think it means
As reported in the Financial Times:
By Chebyshev's inequality, no matter what the probability distribution, the fraction of points which lie within k standard deviations of the mean must be at least (1 - 1/k2). For a normal (Gaussian) distribution, the probability of a 25 standard deviation outlier is much less, so much so as to be negligible. But even for the less stringent bound, the probability of being 25 or more standard deviations from the mean is at most 1/625, or 0.0016. To do that for three days in a row is at most (1/625)3 = 1/244140625 = 4.096 * 10-9.
Put another way: There are about 250 trading days in a year (weekdays, excluding holidays). Even at the Chebyshev limit, it would take an expected million years or so to get three straight days of 25 standard deviation outliers. And Viniar's comment does not rule out a longer run of outliers.
Either these guys have botched the calculation, or they do not understand what standard deviation actually means.
(h/t Brad DeLong)
"We were seeing things that were 25-standard deviation moves, several days in a row,” said David Viniar, Goldman’s chief financial officer.
By Chebyshev's inequality, no matter what the probability distribution, the fraction of points which lie within k standard deviations of the mean must be at least (1 - 1/k2). For a normal (Gaussian) distribution, the probability of a 25 standard deviation outlier is much less, so much so as to be negligible. But even for the less stringent bound, the probability of being 25 or more standard deviations from the mean is at most 1/625, or 0.0016. To do that for three days in a row is at most (1/625)3 = 1/244140625 = 4.096 * 10-9.
Put another way: There are about 250 trading days in a year (weekdays, excluding holidays). Even at the Chebyshev limit, it would take an expected million years or so to get three straight days of 25 standard deviation outliers. And Viniar's comment does not rule out a longer run of outliers.
Either these guys have botched the calculation, or they do not understand what standard deviation actually means.
(h/t Brad DeLong)
Monday, August 13, 2007
R.I.P. R. A. Alpher
Ralph A. Alpher, the last surviving author of the paper by Alpher, Bethe, and Gamow, has passed away.
(h/t Uncertain Principles)
(h/t Uncertain Principles)
Additions to the pile: Weeks of 6 August and 13 August 2007
Articles of interest in the last two weeks:
Sitnov, M. I., P. N. Guzdar, and M. Swisdak (2007), Atypical durrent sheets and plasma bubbles: A self-consistent kinetic model, GRL 34, L15101.
Trávníček, P., P. Hellinger, M. G. G. T. Taylor, C. P. Escoubet, I. Dandouras, and E. Lucek (2007), Magnetosheath plasma expansion: Hybrid simulations, GRL 34, L15104.
Hubert, B., K. Kauristie, O. Amm, S. E. Milan, A. Grocott, S. W. H. Cowley, and T. I. Pulkkinen (2007), Auroral streamers and magnetic flux closure, GRL 34, L15105.
Bahcivan, H. (2007), Plasma wave heating during extreme electric fields in the high latitude E region, GRL 34, L15106.
Watanabe, M., A. Kadokura, N. Sato, and T. Saemundsson (2007), Absence of geomagnetic conjugacy in pulsating auroras, GRL 34, L15107. At 7 pages, longer than some JGR papers.
Villante, U., P. Francia, M. Vellante, P. Di Giuseppe, A. Nubile, and M. Piersanti (2007), Correction to "Long-period oscillations at discrete frequencies: A comparative analysis of ground, magnetospheric , and interplanetary observations," JGR 112, A08202. The original paper is JGR 112, A04210.
Fairfield, D. H., M. M. Kuznetsova, T. Mukai, T. Nagai, T. I. Gombosi, and A. J. Ridley (2007), Waves on the dusk flank boundary layer during very northward interplanetary magnetic field conditions: Observations and simulation, JGR 112, A08206.
Trattner, K. J., J. S. Mulcock, S. M. Petrinec, and S. A. Fuselier (2007), Probing the boundary between antiparallel and component reconnection during southward interplanetary magnetic field conditions, JGR 112, A08210.
Sitnov, M. I., P. N. Guzdar, and M. Swisdak (2007), Atypical durrent sheets and plasma bubbles: A self-consistent kinetic model, GRL 34, L15101.
Trávníček, P., P. Hellinger, M. G. G. T. Taylor, C. P. Escoubet, I. Dandouras, and E. Lucek (2007), Magnetosheath plasma expansion: Hybrid simulations, GRL 34, L15104.
Hubert, B., K. Kauristie, O. Amm, S. E. Milan, A. Grocott, S. W. H. Cowley, and T. I. Pulkkinen (2007), Auroral streamers and magnetic flux closure, GRL 34, L15105.
Bahcivan, H. (2007), Plasma wave heating during extreme electric fields in the high latitude E region, GRL 34, L15106.
Watanabe, M., A. Kadokura, N. Sato, and T. Saemundsson (2007), Absence of geomagnetic conjugacy in pulsating auroras, GRL 34, L15107. At 7 pages, longer than some JGR papers.
Villante, U., P. Francia, M. Vellante, P. Di Giuseppe, A. Nubile, and M. Piersanti (2007), Correction to "Long-period oscillations at discrete frequencies: A comparative analysis of ground, magnetospheric , and interplanetary observations," JGR 112, A08202. The original paper is JGR 112, A04210.
Fairfield, D. H., M. M. Kuznetsova, T. Mukai, T. Nagai, T. I. Gombosi, and A. J. Ridley (2007), Waves on the dusk flank boundary layer during very northward interplanetary magnetic field conditions: Observations and simulation, JGR 112, A08206.
Trattner, K. J., J. S. Mulcock, S. M. Petrinec, and S. A. Fuselier (2007), Probing the boundary between antiparallel and component reconnection during southward interplanetary magnetic field conditions, JGR 112, A08210.
Tuesday, July 31, 2007
Additions to the pile: Weeks of 23 and 30 July 2007
Catching up on the literature after a week away.
Lavraud, B., J. E. Borovsky, A. J. Ridley, E. W. Pogue, M. F. Thomsen, H. Rème, A. N. Fazakerley, and E. A. Lucek (2007), Strong bulk plasma acceleration in Earth's magnetosheath: A magnetic slingshot effect?, GRL 34, L14102.
Phan, T. D., G. Paschmann, C. Twitty, F. S. Mozer, J. T. Gosling, J. P. Eastwood, M. Øieroset, H. Rème, and E. A. Lucek (2007), Evidence for magnetic reconnection initiated in the magnetosheath, GRL 34, L14104.
Schwadron, N. A., and D. J. McComas (2007), Modulation of anomalous and galactic cosmic rays beyond the termination shock, GRL 34, L14105.
Tokunaga, T., H. Kohta, A. Yoshikawa, T. Uozumi, and K. Yumoto (2007), Global features of Pi 2 pulsations obtained by independent component analysis, GRL 34, L14106.
Liou, K. (2007), Large, abrupt pressure decreases as a substorm onset trigger, GRL 34, L14107.
André, N., A. M. Persoon, J. Goldstein, J. L. Burch, P. Louarn, G. R. Lewis, A. M. Rymer, A. J. Coates, W. S. Kurth, E. C. Sittler, M. F. Thomsen, F. J. Crary, M. K. Dougherty, D. A. Gurnett, and D. T. Young (2007), Magnetic signatures of plasma-depleted flux tubes in the Saturnian inner magnetosphere, GRL 34, L14108.
Hellinger, P., P. Trávniček, B. Lembège, and P. Savoini (2007), Emission of nonlinear whistler waves at the front of perpendicular supercritical shocks: Hybrid versus full particle simulations, GRL 34, L14109.
Gary, S. P., and S. Saito (2007), Broadening of solar wind strahl pitch-angles by the electron/electron instability: Particle-in-cell simulations, GRL 34, L14111.
Chen, M. W., C.-P. Wang, M. Schultz, and L. R. Lyons (2007), Solar-wind influence on MLT dependence of plasma sheet conditions and their effects on storm time ring current formation, GRL 34, L14112.
Kawano, H., and D.-H. Lee (2007), Gradient methods applied to simulated ULF data: The effects of the ionospheric damping factor, JGR 112, A07212.
Gjerloev, J. W., R. A. Hoffman, J. B. Sigwarth, and L. A. Frank (2007), Statistical description of the bulge-type auroral substorm in the far ultraviolet, JGR 112, A07213.
Hu, Y. Q., X. C. Guo, and C. Wang (2007), On the ionospheric and reconnection potentials of the earth: Results from global MHD simulations, JGR 112, A07215.
Toivanen, P. K., Deformation method for electromagnetic magnetospheric fields: 2. Application to the earth's magnetosphere, JGR 112, A07216. Presumably the companion paper to Toivanen's paper earlier this month.
Liu, Y. C.-M., M. A. Lee, H. Kucharek, and B. Miao (2007), Ion thermalization and wave excitation downstream of Earth's bow shock: A theory for Cluster observations of He2+ acceleration, JGR 112, A07217.
Matsui, H., P. A. Puhl-Quinn, R. B. Torbert, W. Baumjohann, C. J. Farrugia, C. G. Mouikis, E. A. Lucek, P. M. E. Décréau, and G. Paschmann (2007), JGR 112, A07218.
Lavraud, B., J. E. Borovsky, A. J. Ridley, E. W. Pogue, M. F. Thomsen, H. Rème, A. N. Fazakerley, and E. A. Lucek (2007), Strong bulk plasma acceleration in Earth's magnetosheath: A magnetic slingshot effect?, GRL 34, L14102.
Phan, T. D., G. Paschmann, C. Twitty, F. S. Mozer, J. T. Gosling, J. P. Eastwood, M. Øieroset, H. Rème, and E. A. Lucek (2007), Evidence for magnetic reconnection initiated in the magnetosheath, GRL 34, L14104.
Schwadron, N. A., and D. J. McComas (2007), Modulation of anomalous and galactic cosmic rays beyond the termination shock, GRL 34, L14105.
Tokunaga, T., H. Kohta, A. Yoshikawa, T. Uozumi, and K. Yumoto (2007), Global features of Pi 2 pulsations obtained by independent component analysis, GRL 34, L14106.
Liou, K. (2007), Large, abrupt pressure decreases as a substorm onset trigger, GRL 34, L14107.
André, N., A. M. Persoon, J. Goldstein, J. L. Burch, P. Louarn, G. R. Lewis, A. M. Rymer, A. J. Coates, W. S. Kurth, E. C. Sittler, M. F. Thomsen, F. J. Crary, M. K. Dougherty, D. A. Gurnett, and D. T. Young (2007), Magnetic signatures of plasma-depleted flux tubes in the Saturnian inner magnetosphere, GRL 34, L14108.
Hellinger, P., P. Trávniček, B. Lembège, and P. Savoini (2007), Emission of nonlinear whistler waves at the front of perpendicular supercritical shocks: Hybrid versus full particle simulations, GRL 34, L14109.
Gary, S. P., and S. Saito (2007), Broadening of solar wind strahl pitch-angles by the electron/electron instability: Particle-in-cell simulations, GRL 34, L14111.
Chen, M. W., C.-P. Wang, M. Schultz, and L. R. Lyons (2007), Solar-wind influence on MLT dependence of plasma sheet conditions and their effects on storm time ring current formation, GRL 34, L14112.
Kawano, H., and D.-H. Lee (2007), Gradient methods applied to simulated ULF data: The effects of the ionospheric damping factor, JGR 112, A07212.
Gjerloev, J. W., R. A. Hoffman, J. B. Sigwarth, and L. A. Frank (2007), Statistical description of the bulge-type auroral substorm in the far ultraviolet, JGR 112, A07213.
Hu, Y. Q., X. C. Guo, and C. Wang (2007), On the ionospheric and reconnection potentials of the earth: Results from global MHD simulations, JGR 112, A07215.
Toivanen, P. K., Deformation method for electromagnetic magnetospheric fields: 2. Application to the earth's magnetosphere, JGR 112, A07216. Presumably the companion paper to Toivanen's paper earlier this month.
Liu, Y. C.-M., M. A. Lee, H. Kucharek, and B. Miao (2007), Ion thermalization and wave excitation downstream of Earth's bow shock: A theory for Cluster observations of He2+ acceleration, JGR 112, A07217.
Matsui, H., P. A. Puhl-Quinn, R. B. Torbert, W. Baumjohann, C. J. Farrugia, C. G. Mouikis, E. A. Lucek, P. M. E. Décréau, and G. Paschmann (2007), JGR 112, A07218.
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