Search Results - "Roble, R. G."

Day-to-day ionospheric variability due to lower atmosphere perturbations by Liu, H.-L., Yudin, V. A., Roble, R. G.

“…Ionospheric day‐to‐day variability is a ubiquitous feature, even in the absence of appreciable geomagnetic activities. Although meteorological perturbations…”
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Ionospheric variability due to planetary waves and tides for solar minimum conditions by Liu, H.-L., Wang, W., Richmond, A. D., Roble, R. G.

“…Large ionospheric variability is found at low to middle latitudes when a quasi‐stationary planetary wave is specified in the winter stratosphere in the…”
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Tropospheric tidal effects on the middle and upper atmosphere by Hagan, M. E., Maute, A., Roble, R. G.

“…Numerical experiments that explore the effects of tides of tropospheric origin on the upper and middle atmosphere reveal strong signatures of an eastward…”
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Thermosphere extension of the Whole Atmosphere Community Climate Model by Liu, H.-L., Foster, B. T., Hagan, M. E., McInerney, J. M., Maute, A., Qian, L., Richmond, A. D., Roble, R. G., Solomon, S. C., Garcia, R. R., Kinnison, D., Marsh, D. R., Smith, A. K., Richter, J., Sassi, F., Oberheide, J.

“…In atmospheric and space environment studies it is key to understand and to quantify the coupling of atmospheric regions and the solar impacts on the whole…”
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Connections between deep tropical clouds and the Earth's ionosphere by Hagan, M. E., Maute, A., Roble, R. G., Richmond, A. D., Immel, T. J., England, S. L.

“…We report on a series of simulations with the National Center for Atmospheric Research (NCAR) thermosphere‐ionosphere‐mesosphere‐electrodynamics general…”
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Diurnal nonmigrating tides from TIMED Doppler Interferometer wind data: Monthly climatologies and seasonal variations by Oberheide, J., Wu, Q., Killeen, T. L., Hagan, M. E., Roble, R. G.

“…TIMED Doppler Interferometer (TIDI) measurements of zonal and meridional winds in the mesosphere/lower thermosphere are analyzed for diurnal nonmigrating tides…”
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A study of a self-generated stratospheric sudden warming and its mesospheric–lower thermospheric impacts using the coupled TIME-GCM/CCM3 by Liu, H.-L., Roble, R. G.

“…A stratospheric sudden warming episode was self‐consistently generated in the coupled National Center for Atmospheric Research Thermosphere, Ionosphere,…”
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Global distribution and interannual variations of mesospheric and lower thermospheric neutral wind diurnal tide: 1. Migrating tide by Wu, Q., Ortland, D. A., Killeen, T. L., Roble, R. G., Hagan, M. E., Liu, H.-L., Solomon, S. C., Xu, Jiyao, Skinner, W. R., Niciejewski, R. J.

“…Using the TIMED Doppler interferometer (TIDI) mesospheric and lower thermospheric neutral‐wind multiyear data set (2002–2007) and NCAR TIME General Circulation…”
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Long-lasting disturbances in the equatorial ionospheric electric field simulated with a coupled magnetosphere-ionosphere-thermosphere model by Richmond, A. D., Peymirat, C., Roble, R. G.

“…The Magnetosphere‐Thermosphere‐Ionosphere‐Electrodynamics General Circulation model of Peymirat et al. [1998] is used to investigate ionospheric‐wind‐dynamo…”
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A dayside ionospheric positive storm phase driven by neutral winds by Lu, G., Goncharenko, L. P., Richmond, A. D., Roble, R. G., Aponte, N.

“…This paper presents observations and numerical simulations of ionospheric and thermospheric disturbances associated with a moderate geomagnetic storm on 10…”
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First daytime thermospheric wind observation from a balloon-borne Fabry-Perot interferometer over Kiruna (68N) by Wu, Qian, Wang, W., Roble, R. G., Häggström, Ingemar, Strømme, Anja

“…HIWIND (High altitude Interferometer WIND Observation) is the first balloon Fabry‐Perot interferometer (FPI) to achieve successful thermospheric wind…”
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TIME-GCM study of the ionospheric equatorial vertical drift changes during the 2006 stratospheric sudden warming by Maute, A., Hagan, M. E., Richmond, A. D., Roble, R. G.

“…This modeling study quantifies the daytime low‐latitude vertical E×B drift changes in the longitudinal wave number 1 (wn1) to wn4 during the major extended…”
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Joule heating and nitric oxide in the thermosphere by Barth, C. A., Lu, G., Roble, R. G.

“…The effect of Joule heating on the density of nitric oxide in the thermosphere was studied using observations from the Student Nitric Oxide Explorer (SNOE)…”
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On the relationship of Joule heating and nitric oxide radiative cooling in the thermosphere by Lu, G., Mlynczak, M. G., Hunt, L. A., Woods, T. N., Roble, R. G.

“…During geomagnetic storms Joule heating dissipation is the dominant form of magnetospheric energy input that is responsible for many chemical and dynamical…”
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Review of mesospheric temperature trends by Beig, G., Keckhut, P., Lowe, R. P., Roble, R. G., Mlynczak, M. G., Scheer, J., Fomichev, V. I., Offermann, D., French, W. J. R., Shepherd, M. G., Semenov, A. I., Remsberg, E. E., She, C. Y., Lübken, F. J., Bremer, J., Clemesha, B. R., Stegman, J., Sigernes, F., Fadnavis, S.

“…In recent times it has become increasingly clear that releases of trace gases from human activity have a potential for causing change in the upper atmosphere…”
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Global thermosphere-ionosphere response to onset of 20 November 2003 magnetic storm by Crowley, G., Hackert, C. L., Meier, R. R., Strickland, D. J., Paxton, L. J., Pi, X., Mannucci, A., Christensen, A. B., Morrison, D., Bust, G. S., Roble, R. G., Curtis, N., Wene, G.

“…There is great interest in understanding how the thermosphere‐ionosphere system responds to geomagnetic storms. New insights are possible using the new…”
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Northern Hemisphere atmospheric influence of the solar proton events and ground level enhancement in January 2005 by Jackman, C. H., Marsh, D. R., Vitt, F. M., Roble, R. G., Randall, C. E., Bernath, P. F., Funke, B., López-Puertas, M., Versick, S., Stiller, G. P., Tylka, A. J., Fleming, E. L.

“…Solar eruptions in early 2005 led to a substantial barrage of charged particles on the Earth's atmosphere during the 16–21 January period. Proton fluxes were…”
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Migrating thermospheric tides by Hagan, M. E., Roble, R. G., Hackney, J.

“…The capabilities of the global‐scale wave model (GSWM) [Hagan et al., 1995, 1999] are extended to include migrating thermospheric solar tides. The GSWM…”
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Simulation of nonmigrating tide influences on the thermosphere and ionosphere with a TIMED data driven TIEGCM by Wu, Q., Ortland, D.A., Foster, B., Roble, R.G.

“…Using TIMED data as the lower boundary condition at 95km altitude for both the migrating and nonmigrating tide source, we run the NCAR Thermosphere Ionosphere…”
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Comparative terrestrial planet thermospheres: 3. Solar cycle variation of global structure and winds at solstices by Bougher, S. W., Engel, S., Roble, R. G., Foster, B.

“…The comparison of planetary upper atmospheres using global databases has entered a new era with the advent of recent aerobraking measurements of the Mars…”
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