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Found 54 entries in the Bibliography.
Showing entries from 1 through 50
| 2020 |
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An outstanding issue in the general circulation model simulations for Earth\textquoterights upper atmosphere is the inaccurate estimation of Joule heating, which could be associated with the inaccuracy of empirical models for high-latitude electrodynamic forcing. The binning methods used to develop those empirical models may contribute to the inaccuracy. Traditionally, data are binned through a static binning approach by using fixed geomagnetic coordinates, in which the dynamic nature of the forcing is ... Zhu, Qingyu; Deng, Yue; Richmond, Arthur; Maute, Astrid; Chen, Yun-Ju; Hairston, Marc; Kilcommons, Liam; Knipp, Delores; Redmon, Robert; Mitchell, Elizabeth; Published by: Journal of Geophysical Research: Space Physics Published on: 01/2020 YEAR: 2020 DOI: 10.1029/2019JA027270 Electric field; high latitude; Joule heating; particle precipitation |
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Global-scale observations and modeling of far-ultraviolet airglow during twilight The NASA Global‐scale Observations of the Limb and Disk ultraviolet imaging spectrograph performs observations of upper atmosphere airglow from the sunlit disk and limb of the Earth Solomon, Stanley; Andersson, Laila; Burns, Alan; Eastes, Richard; Martinis, Carlos; McClintock, William; Richmond, Arthur; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2020 DOI: 10.1029/2019JA027645 |
| 2018 |
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We present the results of complex obser-vationsof various parameters of the middle and upper atmosphere over Siberia in December 2012 \textendashJanuary 2013, during a major sudden stratospheric warming (SSW) event. We analyze variations in ozone concentra-tion from microwave measurements, in stratosphere and lower mesosphere temperatures from lidar and satellite measurements, in the F2-layer critical frequency (foF2), in the total electron content (TEC), as well as in the ra-tio of concentrations of atomic oxygen to mole ... Ясюкевич, Анна; Yasyukevich, Anna; Клименко, Максим; Klimenko, Maksim; Куликов, Юрий; Kulikov, Yury; Клименко, Владимир; Klimenko, Vladimir; Бессараб, Федор; Bessarab, Fedor; Кореньков, Юрий; Korenkov, Yuriy; Маричев, Валерий; Marichev, Valery; Ратовский, Константин; Ratovsky, Konstantin; Колесник, Сергей; Kolesnik, Sergey; Published by: Solnechno-Zemnaya Fizika Published on: 08/2018 YEAR: 2018 DOI: 10.12737/issue_5c1b83b913d443.7589563310.12737/szf-44201807 |
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This paper investigates and quantifies the longitudinal, solar cyclical, and diurnal variation of the ionosphere peak electron density observed by six ionosondes located between 18 and 151\textdegreeE near 60\textdegreeN. Embedded within this region is the Bering Sea anomaly (BSA) where the midnight peak electron density exceeds the midday peak electron density in summer. The BSA is a region West of Alaska extending from approximately 100\textdegree to 200\textdegree east geographic longitude and 55\textdegree to 70\textd ... Richards, P.; Meier, R.; Chen, Shihping; Dandenault, P.; Published by: Journal of Geophysical Research: Space Physics Published on: 08/2018 YEAR: 2018 DOI: 10.1029/2018JA025413 |
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Key developments have been made to the NCAR Whole Atmosphere Community Climate Model with thermosphere and ionosphere extension (WACCM-X). Among them, the most important are the self-consistent solution of global electrodynamics, and transport of O+ in the F-region. Other ionosphere developments include time-dependent solution of electron/ion temperatures, metastable O+ chemistry, and high-cadence solar EUV capability. Additional developments of the thermospheric components are improvements to the mo ... Liu, Han-Li; Bardeen, Charles; Foster, Benjamin; Lauritzen, Peter; Liu, Jing; Lu, Gang; Marsh, Daniel; Maute, Astrid; McInerney, Joseph; Pedatella, Nicholas; Qian, Liying; Richmond, Arthur; Roble, Raymond; Solomon, Stanley; Vitt, Francis; Wang, Wenbin; Published by: Journal of Advances in Modeling Earth Systems Published on: 01/2018 YEAR: 2018 DOI: 10.1002/jame.v10.210.1002/2017MS001232 |
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Changes in the Stratosphere and Ionosphere Parameters During the 2013 Major Stratospheric Warming The paper presents the results of the complex experiment (lidar and ozonometric observations), carried out during the period of the 2013 major sudden stratospheric warming (SSW) in the North Asia region. The data of this experiment were supplemented by the ionospheric parameters observations. We considered variations in the critical frequency and peak height of the ionospheric F2-layer (foF2) from ionosonde measurements in Tomsk and Irkutsk, as well as the behavior of the total electron content (TEC) based on the phase du ... Yasyukevich, Anna; Kulikov, Yury; Klimenko, Maxim; Klimenko, Vladimir; Bessarab, Fedor; Korenkov, Yury; Marichev, Valery; Ratovsky, Konstantin; Kolesnik, Sergey; Published by: Published on: YEAR: 2018 DOI: 10.23919/URSI-AT-RASC.2018.8471322 |
| 2017 |
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The Global-Scale Observations of the Limb and Disk (GOLD) Mission The Earth\textquoterights thermosphere and ionosphere constitute a dynamic system that varies daily in response to energy inputs from above and from below. This system can exhibit a significant response within an hour to changes in those inputs, as plasma and fluid processes compete to control its temperature, composition, and structure. Within this system, short wavelength solar radiation and charged particles from the magnetosphere deposit energy, and waves propagating from the lower atmosphere dissipate. Understand ... Eastes, R.; McClintock, W.; Burns, A.; Anderson, D.; Andersson, L.; Codrescu, M.; Correira, J.; Daniell, R.; England, S.; Evans, J.; Harvey, J.; Krywonos, A.; Lumpe, J.; Richmond, A.; Rusch, D.; Siegmund, O.; Solomon, S.; Strickland, D.; Woods, T.; Aksnes, A.; Budzien, S.; Dymond, K.; Eparvier, F.; Martinis, C.; Oberheide, J.; Published by: Space Science Reviews Published on: 10/2017 YEAR: 2017 DOI: 10.1007/s11214-017-0392-2 |
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This paper investigates and quantifies the causes of the Weddell Sea Anomaly (WSA), a region near the tip of South America extending from approximately 30\textdegree to 120\textdegreeW geographic longitude and 50\textdegree to 75\textdegreeS geographic latitude at solar minimum between 2007 and 2010. This region is unusual because the midnight peak electron density exceeds the midday peak electron density in summer. This study is far more quantitative than previous studies because, unlike other models, it assimilates sele ... Richards, P.; Meier, R.; Chen, Shih-Ping; Drob, D.; Dandenault, P.; Published by: Journal of Geophysical Research: Space Physics Published on: 05/2017 YEAR: 2017 DOI: 10.1002/2016JA023565 |
| 2016 |
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High-latitude energy input and its impact on the thermosphere This paper presents a quantitative assessment of high-latitude energy input and its partitioning in the polar cap by synthesizing various space and ground-based observations during the 17 January 2005 geomagnetic storm. It was found that Joule heating is the primary form of magnetospheric energy input, especially during active times when the hemispheric-integrated Joule heating can be an order of magnitude larger than the hemispheric-integrated auroral power. Most of magnetospheric energy is dissipated in the auroral zone ... Lu, G.; Richmond, A.; Lühr, H.; Paxton, L.; Published by: Journal of Geophysical Research: Space Physics Published on: 07/2016 YEAR: 2016 DOI: 10.1002/2015JA022294 |
| 2015 |
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We analyze how the evening equatorial plasma vortex and the prereversal enhancement (PRE) of the vertical drift are influenced by the distributions of conductivity in the E and F regions in relation to the wind, through numerical simulations with the thermosphere-ionosphere-electrodynamics general circulation model coupled with the global ionosphere-plasmasphere model. The nightside electric potential satisfies an approximate minimization principle that unifies the connection of the horizontal and vertic ... Published by: Journal of Geophysical Research: Space Physics Published on: 03/2015 YEAR: 2015 DOI: 10.1002/2014JA020935 equatorial ionosphere convection; night-time ionization; pre-reversal enhancement |
| 2014 |
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This paper investigates unusually deep and sudden electron density depletions (troughs) observed in the Poker Flat (Alaska) Incoherent Scatter Radar data in middle summer of 2007 and 2008. The troughs were observed in the premidnight sector during periods of weak magnetic and solar activity. The density recovered to normal levels around midnight. At the time when the electron density was undergoing its steep decrease, there was usually a surge of the order of 100 to 400 K in the ion temperature that lasted less than 1 h. ... Richards, P.; Nicolls, M.; St.-Maurice, J.-P.; Goodwin, L.; Ruohoniemi, J.; Published by: Journal of Geophysical Research: Space Physics Published on: 12/2014 YEAR: 2014 DOI: 10.1002/jgra.v119.1210.1002/2014JA020541 |
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Solar and Heliospheric Physics General Contributions II Posters
Richardson, Ian; Millan, Robyn; Paxton, Larry; Zhao, Lingling; Published by: Published on: |
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Magnetospheric Physics General Contributributions Posters
Millan, Robyn; Paxton, Larry; Richardson, Ian; Published by: Published on: |
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The NCAR TIE-GCM: A community model of the coupled thermosphere/ionosphere system
Qian, Liying; Burns, Alan; Emery, Barbara; Foster, Benjamin; Lu, Gang; Maute, Astrid; Richmond, Arthur; Roble, Raymond; Solomon, Stanley; Wang, Wenbin; Published by: Modeling the Ionosphere-Thermosphere System Published on: |
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The International Reference Ionosphere 2012--a model of international collaboration
Bilitza, Dieter; Altadill, David; Zhang, Yongliang; Mertens, Chris; Truhlik, Vladimir; Richards, Phil; McKinnell, Lee-Anne; Reinisch, Bodo; Published by: Journal of Space Weather and Space Climate Published on: |
| 2012 |
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Marsal, S.; Richmond, A.; Maute, A.; Anderson, B.; Published by: Journal of Geophysical Research Published on: Jan-01-2012 YEAR: 2012 DOI: 10.1029/2011JA017416 |
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This paper presents our effort to assimilate FORMOSAT-3/COSMIC (F3/C) GPS Occultation Experiment (GOX) observations into the National Center for Atmospheric Research (NCAR) Thermosphere Ionosphere Electrodynamics General Circulation Model (TIE-GCM) by means of ensemble Kalman filtering (EnKF). The F3/C electron density profiles (EDPs) uniformly distributed around the globe which provide an excellent opportunity to monitor the ionospheric electron density structure. The NCAR TIE-GCM simulates the Earth\textquoterights ther ... Lee, I.; Matsuo, T.; Richmond, A.; Liu, J; Wang, W.; Lin, C.; Anderson, J.; Chen, M.; Published by: Journal of Geophysical Research Published on: 10/2012 YEAR: 2012 DOI: 10.1029/2012JA017700 data assimilation; ensemble Kalman filter; FORMOSAT-3/COSMIC; Ionosphere |
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Emery, B; Roble, Raymond; Ridley, Cicely; Richmond, Arthur; Knipp, Delores; Crowley, Geoff; Evans, David; Rich, Frederick; Maeda, Sawako; Published by: NCAR Tech. Note NCAR/TN-491+ STR Published on: |
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Emery, B; Roble, Raymond; Ridley, Cicely; Richmond, Arthur; Knipp, Delores; Crowley, Geoff; Evans, David; Rich, Frederick; Maeda, Sawako; Published by: NCAR Tech. Note NCAR/TN-491+ STR Published on: |
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Reversed two-cell convection in the northern and southern hemisphere during northward IMF
Lu, G; Li, W; Raeder, J; Deng, Y; Rich, F; Ober, D; Zhang, Y; Paxton, L; Ruohoniemi, M; Hairston, M; , others; Published by: Published on: |
| 2011 |
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Lu, G.; Li, W.; Raeder, J.; Deng, Y.; Rich, F.; Ober, D.; Zhang, Y.; Paxton, L.; Ruohoniemi, J.; Hairston, M.; Newell, P.; Published by: Journal of Geophysical Research Published on: Jan-01-2011 YEAR: 2011 DOI: 10.1029/2011JA017043 |
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Modeling Density Variation in the Thermosphere when this function is imposed at the lower boundary of the TIEGCM, neutral density variation consistent with satellite drag data, and O/N2 consistent with measurements by TIMED/GUVI Published by: Published on: |
| 2010 |
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Electric fields and large-scale undulations in the evening sector of the diffuse auroral zone
Baishev, D.; Barkova, E.; Stepanov, A.; Rich, F.; Yumoto, K.; Published by: Geomagnetism and Aeronomy Published on: Jan-02-2010 YEAR: 2010 DOI: 10.1134/S0016793210010056 |
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Richards, P.; Meier, R.; Wilkinson, P.; Published by: Journal of Geophysical Research Published on: Jan-01-2010 YEAR: 2010 DOI: 10.1029/2010JA015368 |
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Huang, Chao-Song; Rich, Frederick; de La Beaujardiere, Odile; Heelis, Roderick; Published by: Journal of Geophysical Research Published on: Jan-01-2010 YEAR: 2010 DOI: 10.1029/2009JA014503 |
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Talaat, Elsayed; Fuller-Rowell, Tim; Qian, Liying; Richards, Phil; Ridley, Aaron; Burns, Alan; Bernstein, Dennis; Chamberlin, Phillip; Fedrizzi, Mariangel; Hsieh, Syau-Yun; , others; Published by: 38th COSPAR Scientific Assembly Published on: |
| 2009 |
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Solar wind structure sources and periodicities of auroral electron power over three solar cycles We assess the contributions of various types of solar wind structures (transients, coronal hole high-speed streams (HSS), and slow-speed wind) to hourly average auroral electron power (Pe). The time variation of the solar wind velocity (Vsw) and Pe are determined by HSS, which contribute ∼47\% to Pe and Vsw. Transients contribute ∼42\% of Pe in solar maxima, and ∼6\% in solar minimum. Cross-correlations of Pe with Vsw|B| for negative Bz are significant. Pe exhibits solar rotational periodicities similar to those for Vs ... Emery, Barbara; Richardson, Ian; Evans, David; Rich, Frederick; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: YEAR: 2009 DOI: https://doi.org/10.1016/j.jastp.2008.08.005 Electron auroral energy fluxes; Solar wind speed structures; Solar cycle variations; Periodicities |
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Solar wind structure sources and periodicities of auroral electron power over three solar cycles We assess the contributions of various types of solar wind structures (transients, coronal hole high-speed streams (HSS), and slow-speed wind) to hourly average auroral electron power (Pe). The time variation of the solar wind velocity (Vsw) and Pe are determined by HSS, which contribute ∼47\% to Pe and Vsw. Transients contribute ∼42\% of Pe in solar maxima, and ∼6\% in solar minimum. Cross-correlations of Pe with Vsw|B| for negative Bz are significant. Pe exhibits solar rotational periodicities similar to those for Vs ... Emery, Barbara; Richardson, Ian; Evans, David; Rich, Frederick; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: YEAR: 2009 DOI: https://doi.org/10.1016/j.jastp.2008.08.005 Electron auroral energy fluxes; Solar wind speed structures; Solar cycle variations; Periodicities |
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Richards, PG; Nicolls, MJ; Heinselman, CJ; Sojka, JJ; Holt, JM; Meier, RR; Published by: Journal of Geophysical Research: Space Physics Published on: |
| 2008 |
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Photoelectron flux variations observed from the FAST satellite This paper examines high resolution (ΔE/E\ =\ 0.15) photoelectron energy spectra from 10\ eV to 1\ keV, created by solar irradiances between 1.2 and 120\ nm. The observations were made from the FAST satellite at \~3000\ km, equatorward of the auroral oval for the July\textendashAugust, 2002 solar rotation. These data are compared with the solar irradiance observed by the Solar EUV Experiment (SEE) on the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) sat ... Peterson, W.K.; Woods, T.N.; Chamberlin, P.C.; Richards, P.G.; Published by: Advances in Space Research Published on: Jan-09-2008 YEAR: 2008 DOI: 10.1016/j.asr.2007.08.038 |
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XUV Photometer System (XPS): Improved Solar Irradiance Algorithm Using CHIANTI Spectral Models
Woods, Thomas; Chamberlin, Phillip; Peterson, W.; Meier, R.; Richards, Phil; Strickland, Douglas; Lu, Gang; Qian, Liying; Solomon, Stanley; Iijima, B.; Mannucci, A.; Tsurutani, B.; Published by: Solar Physics Published on: Jan-08-2008 YEAR: 2008 DOI: 10.1007/s11207-008-9196-6 |
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Eriksson, S.; Hairston, M.; Rich, F.; Korth, H.; Zhang, Y.; Anderson, B.; Published by: Journal of Geophysical Research Published on: Jan-01-2008 YEAR: 2008 DOI: 10.1029/2008JA013139 |
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The PECOS mission of small space weather satellites in the post DMSP era
de La Beaujardiere, O; Hanscom, AFB; Rich, FJ; Cooke, DA; Mozer, J; Ober, D; Huang, C; Gentile, LC; Published by: Published on: |
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Hecht, JH; Mulligan, T; Strickland, DJ; Kochenash, AJ; Murayama, Y; Tanaka, Y-M; Evans, DS; Conde, MG; Donovan, EF; Rich, FJ; , others; Published by: Journal of Geophysical Research: Space Physics Published on: |
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Effects of high-latitude ionospheric electric field variability on the Joule heating and mechanical energy transfer rate are investigated by incorporating realistic spatial and temporal characteristics of electric field variability derived from observations into the forcing of a thermosphere ionosphere electrodynamic general circulation model. First, the characteristics of subgrid-scale variability are examined from a spectral analysis of Dynamic Explorer-2 (DE-2) plasma drift measurements. The analysis reveals that the subg ... Matsuo, Tomoko; Richmond, Arthur; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2008 DOI: https://doi.org/10.1029/2007JA012993 Joule heating rate; mechanical energy transfer rate; electric field variability |
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Effects of high-latitude ionospheric electric field variability on the Joule heating and mechanical energy transfer rate are investigated by incorporating realistic spatial and temporal characteristics of electric field variability derived from observations into the forcing of a thermosphere ionosphere electrodynamic general circulation model. First, the characteristics of subgrid-scale variability are examined from a spectral analysis of Dynamic Explorer-2 (DE-2) plasma drift measurements. The analysis reveals that the subg ... Matsuo, Tomoko; Richmond, Arthur; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2008 DOI: https://doi.org/10.1029/2007JA012993 Joule heating rate; mechanical energy transfer rate; electric field variability |
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The linkage between the ring current and the ionosphere system The coupling between the ring current and the ionosphere is briefly reviewed and discussed. Given global energetic neutral atom (ENA) observations of the ring current, the three-dimensional current system driven by ring current plasma pressure (the region 2 system) is derived to illustrate where the ring current connects to the ionosphere. Special attention is given to how the ring current and ionospheric conductance set up the sub-auroral polarization streams (SAPS) through the closure of the region 2 current through the io ... Brandt, PC; Zheng, Y; Sotirelis, TS; Oksavik, K; Rich, FJ; Published by: Midlatitude ionospheric dynamics and disturbances, edited by: Kintner, PM, Coster, AJ, Fuller-Rowell, T., Mannucci, A. J., Mendillo, M., and Heelis, R., Geophys. Monog. Series Published on: |
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High Latitude Thermosphere-Ionosphere Variability During the Solar Minimum IPY Period
Crowley, G; Curtis, N; Richmond, A; Carlson, H; van Eyken, T; Published by: Published on: |
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A data-model comparative study of ionospheric positive storm phase in the midlatitude F region
Lu, G; Goncharenko, LP; Coster, AJ; Richmond, AD; Roble, RG; Aponte, N; Paxton, LJ; Published by: Published on: |
| 2007 |
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Storm-time ionospheric disturbance electric fields are studied for two large geomagnetic storms, March 31, 2001 and April 17–18, 2002, by comparing low-latitude observations of ionospheric plasma drifts with results from numerical simulations based on a combination of first-principles models. The simulation machinery combines the Rice convection model (RCM), used to calculate inner magnetospheric electric fields, and the coupled thermosphere ionosphere plasmasphere electrodynamics (CTIPe) model, driven, in part, by RCM-com ... Maruyama, Naomi; Sazykin, Stanislav; Spiro, Robert; Anderson, David; Anghel, Adela; Wolf, Richard; Toffoletto, Frank; Fuller-Rowell, Timothy; Codrescu, Mihail; Richmond, Arthur; Millward, George; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: YEAR: 2007 DOI: https://doi.org/10.1016/j.jastp.2006.08.020 Magnetosphere–ionosphere–thermosphere coupling; Ionospheric electrodynamics; low-latitude ionosphere; Penetration electric fields; disturbance dynamo electric fields; Numerical modeling |
| 2006 |
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Basu, S; Basu, S; Makela, J; Miller, E; Dasgupta, A; Roy, S; Huba, J; Groves, K; Rich, F; Published by: Eos Trans. AGU Published on: |
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Basu, S; Makela, J; Miller, E; Dasgupta, AK; Ray, S; Groves, K; Rich, FJ; Published by: Published on: |
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The effects of mid and low latitude electric fields upon the ionosphere and magnetosphere
Garner, TW; Crowley, G; Richmond, A; Roble, RG; Published by: Published on: |
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The impact of sub-auroral polarization streams on GPS-based navigation systems
Basu, Su; Basu, S; Makela, J; Doherty, P; Wright, J; Rich, F; Published by: Published on: |
| 2005 |
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Lin, C.; Richmond, A.D.; Liu, J.Y.; Yeh, H.C.; Paxton, L.; Lu, G.; Tsai, H.F.; Su, S.-Y.; Published by: Journal of Geophysical Research Published on: Jan-01-2005 YEAR: 2005 DOI: 10.1029/2004JA010900 |
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Lin, CH; RichmondJ Y Liu, AD; Yeh, HC; Paxton, LJ; Lu, G; Tsai, HF; Su, SY; Published by: Journal of Geophysical Research-Part A-Space Physics Published on: |
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The GPS-derived total electron content (TEC), ion drift measurements from the ROCSAT-1 spacecraft at around 600 km altitude, and far-ultraviolet airglow measured by the Global Ultraviolet Imager (GUVI) carried on board the NASA TIMED satellite are utilized for studying large disturbances of the low-latitude ionosphere during the October–November 2003 superstorm period. Two chains of GPS receivers, one in the American sector (∼70°W) and the other in the Asian/Australian sector (∼120°E), are used to simultaneously obse ... Lin, C.; Richmond, A.; . Y. Liu, J; Yeh, H.; Paxton, L.; Lu, G.; Tsai, H.; Su, S.-Y.; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2005 DOI: https://doi.org/10.1029/2004JA010900 |
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Determination of Density at High Altitudes Using Rayleigh and Raman Scattering of Solar Radiation The concept of determining the density (particles/unit volume) of atomic and molecular species at high altitudes (100-600 km) by passive remote sensing of the Rayleigh and Raman Wise, John; Sharma, Ramesh; Sioris, Christopher; Chance, Kelly; Richards, E; Sullivan, B; Published by: Published on: |
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Knight, HK; Strickland, DJ; Kochenash, AJ; Hecht, JH; Morrison, D; Zhang, Y; Paxton, LJ; Burke, WJ; Rich, FJ; Published by: Published on: |
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Lin, CH; Richmond, AD; Liu, JY; Yeh, HC; Paxton, LJ; Lu, G; Tsai, HF; Su, S-Y; Published by: Journal of Geophysical Research: Space Physics Published on: |
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