Search Results - "Marklund, G T"

Rippled Quasiperpendicular Shock Observed by the Magnetospheric Multiscale Spacecraft by Johlander, A, Schwartz, S J, Vaivads, A, Khotyaintsev, Yu V, Gingell, I, Peng, I B, Markidis, S, Lindqvist, P-A, Ergun, R E, Marklund, G T, Plaschke, F, Magnes, W, Strangeway, R J, Russell, C T, Wei, H, Torbert, R B, Paterson, W R, Gershman, D J, Dorelli, J C, Avanov, L A, Lavraud, B, Saito, Y, Giles, B L, Pollock, C J, Burch, J L

“…Collisionless shock nonstationarity arising from microscale physics influences shock structure and particle acceleration mechanisms. Nonstationarity has been…”
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Lower hybrid waves in the ion diffusion and magnetospheric inflow regions by Graham, D. B., Khotyaintsev, Yu. V., Norgren, C., Vaivads, A., André, M., Toledo‐Redondo, S., Lindqvist, P.‐A., Marklund, G. T., Ergun, R. E., Paterson, W. R., Gershman, D. J., Giles, B. L., Pollock, C. J., Dorelli, J. C., Avanov, L. A., Lavraud, B., Saito, Y., Magnes, W., Russell, C. T., Strangeway, R. J., Torbert, R. B., Burch, J. L.

“…The role and properties of lower hybrid waves in the ion diffusion region and magnetospheric inflow region of asymmetric reconnection are investigated using…”
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Observations of Turbulence in a Kelvin-Helmholtz Event on 8 September 2015 by the Magnetospheric Multiscale Mission by Stawarz, J. E., Eriksson, S., Wilder, F. D., Ergun, R. E., Schwartz, S. J., Pouquet, A., Burch, J. L., Giles, B. L., Khotyaintsev, Y., Le Contel, O., Lindqvist, P.-A., Magnes, W., Pollock, C. J., Russell, C.T., Strangeway, R. J., Torbert, R. B., Avanov, L. A., Dorelli, J. C., Eastwood, J. P., Gershman, D. J., Goodrich, K. A., Malaspina, D. M., Marklund, G. T., Mirioni, L, Sturner, A. P.

“…Spatial and high-time-resolution properties of the velocities, magnetic field, and 3-D electric field within plasma turbulence are examined observationally…”
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Electron Currents and Heating in the Ion Diffusion Region of Asymmetric Reconnection by Graham, D. B., Khotyaintsev, Yu. V., Norgren, C., Vaivads, A., Andre, M., Lindqvist, P. A., Marklund, G. T., Ergun, R. E., Paterson, W. R., Gershman, D. J., Giles, B. L., Pollock, C. J., Dorelli, J. C.

“…In this letter the structure of the ion diffusion region of magnetic reconnection at Earths magnetopause is investigated using the Magnetospheric Multiscale…”
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Electric Fields and Plasma Processes in the Auroral Downward Current Region, Below, Within, and Above the Acceleration Region by Marklund, G. T.

“…The downward field-aligned current region plays an active role in magnetosphere-ionosphere coupling processes associated with aurora. A quasi-static electric…”
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Finite Gyroradius Effects in the Electron Outflow of Asymmetric Magnetic Reconnection by Norgren, C., Graham, D. B., Khotyaintsev, Yu. V., Andre, M., Vaivads, A., Chen, Li-Jen, Lindqvist, P.-A., Marklund, G. T., Ergun, R. E., Magnes, W., Paterson, W. R., Dorelli, J. C., Giles, B. L., Pollock, C. J.

“…We present observations of asymmetric magnetic reconnection showing evidence of electron demagnetization in the electron outflow. The observations were made at…”
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Statistical altitude distribution of the auroral density cavity by Alm, L., Li, B., Marklund, G. T., Karlsson, T.

“…The statistical altitude distribution of auroral density cavities located between 3.0 and 6.5 RE is investigated using in situ observations from flux tubes…”
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Electron density and parallel electric field distribution of the auroral density cavity by Alm, L., Marklund, G. T., Karlsson, T.

“…We present an event study in which Cluster satellites C1 and C3 encounters the flux tube of a stable auroral arc in the premidnight sector. C1 observes the…”
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In situ observations of density cavities extending above the auroral acceleration region by Alm, L., Marklund, G. T., Karlsson, T.

“…The uppermost part of a stable potential structure in the auroral acceleration region was studied using simultaneous observations of Cluster satellites C1 and…”
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Magnetospheric Multiscale Mission Observations and Non-Force Free Modeling of a Flux Transfer Event Immersed in a Super-Alfvenic Flow by Farrugia, C. J., Lavraud, B., Torbert, R. B., Argall, M., Kacem, I., Yu, W., Alm, L., Burch, J., Russell, C. T., Shuster, J., Dorelli, J., Giles, B. L., Pollock, C.

“…We analyze plasma, magnetic field, and electric field data for a flux transfer event (FTE) to highlight improvements in our understanding of these transient…”
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Cluster multipoint study of the acceleration potential pattern and electrodynamics of an auroral surge and its associated horn arc by Marklund, G. T., Sadeghi, S., Li, Bin, Amm, O., Cumnock, J. A., Zhang, Y., Nilsson, H., Masson, A., Karlsson, T., Lindqvist, P.-A., Fazakerley, A., Lucek, E., Pickett, J.

“…Cluster results are presented from the acceleration region of an auroral surge and connected horn arc, observed during an extended time period of substorm…”
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Dipolarization in the inner magnetosphere during a geomagnetic storm on 7 October 2015 by Matsui, H., Erickson, P. J., Foster, J. C., Torbert, R. B., Argall, M. R., Anderson, B. J., Blake, J. B., Cohen, I. J., Ergun, R. E., Farrugia, C. J., Khotyaintsev, Yu. V., Korth, H., Lindqvist, P.‐A., Magnes, W., Marklund, G. T., Mauk, B. H., Paulson, K. W., Russell, C. T., Strangeway, R. J., Turner, D. L.

“…A dipolarization event was observed by the Magnetospheric Multiscale (MMS) spacecraft at L = 3.8 and 19.8 magnetic local time starting at ∼23:42:36 UT on 7…”
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Temporal evolution and electric potential structure of the auroral acceleration region from multispacecraft measurements by Forsyth, C., Fazakerley, A. N., Walsh, A. P., Watt, C. E. J., Garza, K. J., Owen, C. J., Constantinescu, D., Dandouras, I., Fornaçon, K.-H., Lucek, E., Marklund, G. T., Sadeghi, S. S., Khotyaintsev, Y., Masson, A., Doss, N.

“…Bright aurorae can be excited by the acceleration of electrons into the atmosphere in violation of ideal magnetohydrodynamics. Modeling studies predict that…”
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Temporal evolution of the electric field accelerating electrons away from the auroral ionosphere by Marklund, G. T, Ivchenko, N, Karlsson, T, Fazakerley, A, Dunlop, M, Lindqvist, P.-A, Buchert, S, Owen, C, Taylor, M, Vaivalds, A, Carter, P, André, M, Balogh, A

“…The bright night-time aurorae that are visible to the unaided eye are caused by electrons accelerated towards Earth by an upward-pointing electric field. On…”
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Divergent electric fields in downward current channels by Streltsov, A. V., Marklund, G. T.

“…The results from a numerical study on the formation and dynamics of the localized, diverging perpendicular electric fields found in the nightside auroral…”
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Dynamics and characteristics of black aurora as observed by high-resolution ground-based imagers and radar by Archer, J, Dahlgren, H, Ivchenko, N, Lanchester, B. S, Marklund, G. T

“…High-resolution, multi-spectral data from the ground-based low-light auroral imager ASK (Auroral Structure and Kinetics) are used to characterize the fine…”
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Statistical study on the occurrence of ASAID electric fields by LILEO, S, KARLSSON, T, MARKLUND, G. T

“…The first statistical results on the occurrence of abnormal subauroral ion drifts (ASAID) are presented based on electric and magnetic field measurements from…”
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Investigation of subauroral ion drifts and related field-aligned currents and ionospheric Pedersen conductivity distribution by FIGUEIREDO, S, KARLSSON, T, MARKLUND, G. T

“…Based on Astrid-2 satellite data, results are presented from a statistical study on subauroral ion drift (SAID) occurrence. SAID is a subauroral phenomenon…”
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Magnetospheric Multiscale Observations of Magnetic Reconnection Associated with Kelvin-Helmholtz Waves by Eriksson, S., Lavraud, B., Wilder, F. D., Stawarz, J. E., Giles, B. L., Burch, J. L., Baumjohann, W., Ergun, R. E., Lindqvist, P.-A., Magnes, W., Pollock, C. J., Gershman, D. J., Dorelli, J. C., Avanov, L., Moore, T. E., Paterson, W. R.

“…The four Magnetospheric Multiscale (MMS) spacecraft recorded the first direct evidence of reconnection exhausts associated with Kelvln-Helmholtz (KH) waves at…”
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Simultaneous observations of small multi-scale structures in an auroral arc by Dahlgren, H., Aikio, A., Kaila, K., Ivchenko, N., Lanchester, B.S., Whiter, D.K., Marklund, G.T.

“…Auroral arcs can develop small-scale distortions known as vortex streets or curls. Other common and somewhat larger spatially periodic distortions are auroral…”
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