Search Results - "Ridley, Aaron"

Auroral Characteristics Related to AU&AL Indices by Wu, Chen, Ridley, Aaron J.

“…Auroral images of the N2 Lyman‐Birge‐Hopfield emissions from Polar Ultraviolet Imager (UVI) for 1.5 years are used to investigate the auroral characteristics…”
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Comparison of TIDI Line of Sight Winds With ICON‐MIGHTI Measurements by Wu, Chen, Ridley, Aaron J.

“…The Thermosphere‐Ionosphere‐Mesosphere Energetics and Dynamics (TIMED) satellite has been making observations of the mesosphere and lower thermosphere (MLT)…”
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Seasonal Dependency of the Solar Cycle, QBO, and ENSO Effects on the Interannual Variability of the Wind DW1 in the MLT Region by Wu, Chen, Ridley, Aaron J., Cullens, Chihoko Y.

“…The migrating diurnal tide (DW1) is derived by fitting Hough Mode Extensions to the TIMED/TIDI near‐global wind measurements within the mesosphere and lower…”
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Theoretical study of zonal differences of electron density at midlatitudes with GITM simulation by Wang, Hui, Ridley, Aaron J., Zhu, Jie

“…This study investigated various physical processes responsible for the longitudinal modulation of electron density (Ne) at midlatitudes by employing the global…”
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Exploring the influence of ionospheric O+ outflow on magnetospheric dynamics: dependence on the source location by Yu, Yiqun, Ridley, Aaron J.

“…Heavy ions of ionospheric origin (O+) play an important role in altering global magnetospheric dynamics. While the heavy ions mainly originate from the dayside…”
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NEW OCEAN WINDS SATELLITE MISSION TO PROBE HURRICANES AND TROPICAL CONVECTION by Ruf, Christopher S., Atlas, Robert, Chang, Paul S., Clarizia, Maria Paola, Garrison, James L., Gleason, Scott, Katzberg, Stephen J., Jelenak, Zorana, Johnson, Joel T., Majumdar, Sharanya J., O’brien, Andrew, Posselt, Derek J., Ridley, Aaron J., Rose, Randall J., Zavorotny, Valery U.

“…The Cyclone Global Navigation Satellite System (CYGNSS) is a new NASA earth science mission scheduled to be launched in 2016 that focuses on tropical cyclones…”
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Low‐Density Cell of the Thermosphere at High Latitudes Revisited by Guo, Dongjie, Lei, Jiuhou, Ridley, Aaron, Ren, Dexin

“…The density cell structure in the high‐latitude thermosphere is referred to as the density enhancement or depletion with respect to the surrounding area…”
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On the generation/decay of the storm-enhanced density plumes: Role of the convection flow and field-aligned ion flow by Zou, Shasha, Moldwin, Mark B., Ridley, Aaron J., Nicolls, Michael J., Coster, Anthea J., Thomas, Evan G., Ruohoniemi, J. Michael

“…Storm‐enhanced density (SED) plumes are prominent ionospheric electron density increases at the dayside middle and high latitudes. The generation and decay…”
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Investigating the performance of simplified neutral‐ion collisional heating rate in a global IT model by Zhu, Jie, Ridley, Aaron J.

“…The Joule heating rate has usually been used as an approximate form of the neutral‐ion collisional heating rate in the thermospheric energy equation in global…”
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Effects of electric field methods on modeling the midlatitude ionospheric electrodynamics and inner magnetosphere dynamics by Yu, Yiqun, Jordanova, Vania K., Ridley, Aaron J., Toth, Gabor, Heelis, Roderick

“…We report a self‐consistent electric field coupling between the midlatitude ionospheric electrodynamics and inner magnetosphere dynamics represented in a…”
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Thermospheric Weather as Observed by Ground‐Based FPIs and Modeled by GITM by Harding, Brian J., Ridley, Aaron J., Makela, Jonathan J.

“…The first long‐term comparison of day‐to‐day variability (i.e., weather) in the thermospheric winds between a first‐principles model and data is presented. The…”
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Magnetospheric configuration and dynamics of Saturn's magnetosphere: A global MHD simulation by Jia, Xianzhe, Hansen, Kenneth C., Gombosi, Tamas I., Kivelson, Margaret G., Tóth, Gabor, DeZeeuw, Darren L., Ridley, Aaron J.

“…We investigate the solar wind interaction with Saturn's magnetosphere by using a global magnetohydrodynamic simulation driven by an idealized time‐varying…”
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Relationship Between Temporal and Spatial Resolution for a Constellation of GNSS-R Satellites by Bussy-Virat, Charles D., Ruf, Christopher S., Ridley, Aaron J.

“…Constellations of GNSS-R satellites improve the coverage of regions of interest by repeating measurements in a shorter period of time than with a single…”
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Response of the Geospace System to the Solar Wind Dynamic Pressure Decrease on 11 June 2017: Numerical Models and Observations by Ozturk, Dogacan S., Zou, Shasha, Slavin, James A., Ridley, Aaron J.

“…On 11 June 2017, a sudden solar wind dynamic pressure decrease occurred at 1437 UT according to the OMNI solar wind data. The solar wind velocity did not…”
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Impacts of Lower Thermospheric Atomic Oxygen on Thermospheric Dynamics and Composition Using the Global Ionosphere Thermosphere Model by Malhotra, Garima, Ridley, Aaron J., Marsh, Daniel R., Wu, Chen, Paxton, Larry J., Mlynczak, Martin G.

“…The exchange of energy between the lower atmosphere and the ionosphere thermosphere system is not well understood. One of the parameters that is important in…”
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Simulating electron and ion temperature in a global ionosphere thermosphere model: Validation and modeling an idealized substorm by Zhu, Jie, Ridley, Aaron J., Deng, Yue

“…Electron and ion temperatures control many chemical and physical processes in the ionosphere–thermosphere system. Recently, improved electron and ion energy…”
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Seasonal Dependence of Geomagnetic Active‐Time Northern High‐Latitude Upper Thermospheric Winds by Dhadly, Manbharat S., Emmert, John T., Drob, Douglas P., Conde, Mark G., Doornbos, Eelco, Shepherd, Gordon G., Makela, Jonathan J., Wu, Qian, Nieciejewski, Richard J., Ridley, Aaron J.

“…This study is focused on improving the poorly understood seasonal dependence of northern high‐latitude F region thermospheric winds under active geomagnetic…”
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Saturation of the polar cap potential: Inference from Alfvén wing arguments by Kivelson, Margaret G., Ridley, Aaron J.

“…The cross polar cap potential varies roughly linearly with the solar wind electric field for nominal conditions but asymptotes to a constant value of order 200…”
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A global model: Empirical orthogonal function analysis of total electron content 1999-2009 data by A, Ercha, Zhang, Donghe, Ridley, Aaron J., Xiao, Zuo, Hao, Yongqiang

“…A global ionospheric total electron content (TEC) model based on the empirical orthogonal function (EOF) analysis method is constructed using the global…”
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Global Driving of Auroral Precipitation: 1. Balance of Sources by Mukhopadhyay, Agnit, Welling, Daniel, Liemohn, Michael, Ridley, Aaron, Burleigh, Meghan, Wu, Chen, Zou, Shasah, Connor, Hyunju, Vandegriff, Elizabeth, Dredger, Pauline, Toth, Gabor

“…The accurate determination of auroral precipitation in global models has remained a daunting and rather inexplicable obstacle. Understanding the calculation…”
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