GUVI Biblio





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Found 49 entries in the Bibliography.


Showing entries from 1 through 49


2019

Isolated Auroral Spots Observed by DMSP/SSUSI

This work reports auroral spots event observed by the SSUSI instruments on board the DMSP spacecraft between 22 and 23 July 2009 during the recovery phase of a moderate magnetic storm. The spots were observed between 18:00 and 02:00 magnetic local time and stayed at ~60\textdegree magnetic latitude. They lasted for ~10 hr and corotated with ~64\% of the Earth\textquoterights rotational speed. In situ observations indicate that the isolated auroral spots were produced by energetic ions at energies between 10 and 240 keV, w ...

Zhou, Su; Luan, Xiaoli; Pierrard, Viviane; Han, Desheng;

Published by: Journal of Geophysical Research: Space Physics      Published on: 10/2019

YEAR: 2019     DOI: 10.1029/2019JA026853

Impact of nitric oxide, solar EUV and particle precipitation on thermospheric density decrease

Zhang, Yongliang; Paxton, Larry; Lu, Gang; Yee, Sam;

Published by: Journal of Atmospheric and Solar-Terrestrial Physics      Published on: 01/2019

YEAR: 2019     DOI: 10.1016/j.jastp.2018.11.016

Impact of nitric oxide, solar EUV and particle precipitation on thermospheric density decrease

Zhang, Yongliang; Paxton, Larry; Lu, Gang; Yee, Sam;

Published by: Journal of Atmospheric and Solar-Terrestrial Physics      Published on:

YEAR: 2019     DOI:

2018

Space Weather Events, Hurricanes, and Earthquakes in Mexico in September 2017

In the interval of 4\textendash10 September 2017, the Sun presented multiple solar flares from active region AR 2673. There were also coronal mass ejections that interacted with the Earth\textquoterights magnetosphere. This solar activity produced several space weather events. These events were observed with ground-based instruments of the Mexican Space Weather Service. The Mexican Array RadioTelescope detected highly perturbed solar transits associated with Type I radio emissions from active regions. The Compact Astronom ...

Gonzalez-Esparza, J.; Sergeeva, M.; Corona-Romero, P.; Mejia-Ambriz, J.; Gonzalez, L.; De la Luz, V.; Aguilar-Rodriguez, E.; Rodriguez, M.; andez, Romero-Hern\;

Published by: Space Weather      Published on: 12/2018

YEAR: 2018     DOI: 10.1029/2018SW001995

Transition of Interhemispheric Asymmetry of Equatorial Ionization Anomaly During Solstices

The magnitudes of the two crests of equatorial ionization anomaly (EIA) vary with local time. During the solstices, EIA crest in the winter hemisphere is larger than that in the summer hemisphere before noon/early afternoon. Whereafter, the crest in the summer hemisphere becomes intensified, and the stronger EIA crest transits to the summer hemisphere. Using Constellation Observing System for Meteorology, Ionosphere, and Climate ionospheric radio occultation data, we examine the longitudinal and altitudinal variations of ...

Huang, He; Lu, Xian; Liu, Libo; Wang, Wenbin; Li, Qiaoling;

Published by: Journal of Geophysical Research: Space Physics      Published on: 11/2018

YEAR: 2018     DOI: 10.1029/2018JA026055

On the Responses of Mesosphere and Lower Thermosphere Temperatures to Geomagnetic Storms at Low and Middle Latitudes

Observations from lidars and satellites have shown that large neutral temperature increases and decreases occur in the middle and low latitudes of the mesosphere and lower thermosphere region during geomagnetic storms. Here we undertake first-principles simulations of mesosphere and lower thermosphere temperature responses to storms using the Thermosphere Ionosphere Mesosphere Electrodynamics General Circulation Model to elucidate the nature and causes of these changes. Temperature variations were not uniform; instead, ni ...

Li, Jingyuan; Wang, Wenbin; Lu, Jianyong; Yuan, Tao; Yue, Jia; Liu, Xiao; Zhang, Kedeng; Burns, Alan; Zhang, Yongliang; Li, Zheng;

Published by: Geophysical Research Letters      Published on: 08/2019

YEAR: 2018     DOI: 10.1029/2018GL078968

An Empirical Dayglow Model for the Lyman-Birge-Hopfield-Long Band Derived From the Polar Ultraviolet Imager Data

The Lyman-Birge-Hopfield-long band dayglow emissions near 1,700\ \r A, which were observed by the ultraviolet imager on board Polar satellite, are characterized as a cosine-like function of the solar zenith angle. These emissions are mainly excited by the solar extreme ultraviolet produced photoelectrons acting on the nitrogen molecules. The amplitude and phase factors are used to quantify the cosine-like function and subsequently develop a dayglow model. In this study, a model is developed by considering broader day ...

Wang, Lingmin; Luan, Xiaoli; Lei, Jiuhou; Dou, Xiankang;

Published by: Space Weather      Published on: 07/2018

YEAR: 2018     DOI: 10.1029/2018SW001954

Was Magnetic Storm the Only Driver of the Long-Duration Enhancements of Daytime Total Electron Content in the Asian-Australian Sector Between 7 and 12 September 2017?

In this study, multiple data sets from Beidou geostationary orbit satellites total electron contents (TECs), ionosonde, meteor radar, magnetometer, and model simulations have been used to investigate the ionospheric responses in the Asian-Australian sector during the September 2017 geomagnetic storm. It was found that long-duration daytime TEC enhancements that lasted from 7 to 12 September 2017 were observed by the Beidou geostationary orbit satellite constellation. This is a unique event as the prominent TEC enhancement ...

Lei, Jiuhou; Huang, Fuqing; Chen, Xuetao; Zhong, Jiahao; Ren, Dexin; Wang, Wenbin; Yue, Xinan; Luan, Xiaoli; Jia, Mingjiao; Dou, Xiankang; Hu, Lianhuan; Ning, Baiqi; Owolabi, Charles; Chen, Jinsong; Li, Guozhu; Xue, Xianghui;

Published by: Journal of Geophysical Research: Space Physics      Published on: 04/2018

YEAR: 2018     DOI: 10.1029/2017JA025166

Development and Validation of the Whole Atmosphere Community Climate Model With Thermosphere and Ionosphere Extension (WACCM-X 2.0)

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

2017

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

Ionosphere-thermosphere energy budgets for the ICME storms of March 2013 and 2015 estimated with GITM and observational proxies

The ionosphere-thermosphere (IT) energy partitioning for the interplanetary coronal mass ejection (ICME) storms of 16\textendash19 March 2013 and 2015 is estimated with the Global Ionosphere-Thermosphere Model (GITM), empirical models and proxies derived from in situ measurements. We focus on auroral heating, Joule heating, and thermospheric cooling. Solar wind data, F10.7, OVATION Prime model and the Weimer 2005 model are used to drive GITM from above. Thermospheric nitric oxide and carbon dioxide coo ...

Verkhoglyadova, O.; Meng, X.; Mannucci, A.; Mlynczak, M.; Hunt, L.; Lu, G.;

Published by: Space Weather      Published on: 08/2017

YEAR: 2017     DOI: 10.1002/swe.v15.910.1002/2017SW001650

Solar cycle variations of thermospheric O/N 2 longitudinal pattern from TIMED/GUVI

Thermospheric composition (O/N2 ratio) is well known to have a great impact on the variation of daytime ionospheric electron density. This study aims to investigate the local time, seasonal, and solar cycle variations of the O/N2 longitudinal pattern in both hemispheres during daytime in solstices. The O/N2 data used are from TIMED/Global Ultraviolet Imager observations made over a solar cycle for geomagnetically quiet conditions. The main findings are as follows: (1) The O/N2 l ...

Luan, Xiaoli; Wang, Wenbin; Burns, Alan; Dou, Xiankang;

Published by: Journal of Geophysical Research: Space Physics      Published on: 03/2018

YEAR: 2017     DOI: 10.1002/jgra.v122.210.1002/2016JA023696

Positive and negative ionospheric responses to the March 2015 geomagnetic storm from BDS observations

The most intense geomagnetic storm in solar cycle 24 occurred on March 17, 2015, and the detailed ionospheric storm morphologies are difficultly obtained from traditional observations. In this paper, the Geostationary Earth Orbit (GEO) observations of BeiDou Navigation Satellite System (BDS) are for the first time used to investigate the ionospheric responses to the geomagnetic storm. Using BDS GEO and GIMs TEC series, negative and positive responses to the March 2015 storm are found at local and global scales. During the ...

Jin, Shuanggen; Jin, Rui; Kutoglu, H.;

Published by: Journal of Geodesy      Published on: 01/2017

YEAR: 2017     DOI: 10.1007/s00190-016-0988-4

2016

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

Middle- and low-latitude ionosphere response to 2015 St. Patrick\textquoterights Day geomagnetic storm

This paper presents a study of the St Patrick\textquoterights Day storm of 2015, with its ionospheric response at middle and low latitudes. The effects of the storm in each longitudinal sector (Asian, African, American, and Pacific) are characterized using global and regional electron content. At the beginning of the storm, one or two ionospheric positive storm effects are observed depending on the longitudinal zones. After the main phase of the storm, a strong decrease in ionization is observed at all longitudes, lasting ...

Nava, B.; iguez-Zuluaga, Rodr\; Alazo-Cuartas, K.; Kashcheyev, A.; e, Migoya-Oru\; Radicella, S.M.; Amory-Mazaudier, C.; Fleury, R.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 03/2016

YEAR: 2016     DOI: 10.1002/2015JA022299

Solar activity dependence of nightside aurora in winter conditions

The dependence of the nightside (21:00\textendash03:00 MLT; magnetic local time) auroral energy flux on solar activity was quantitatively studied for winter/dark and geomagnetically quiet conditions. Using data combined from Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics/Global Ultraviolet Imager and Defense Meteorological Satellite Program/Special Sensor Ultraviolet Spectrographic Imager observations, we separated the effects of geomagnetic activity from those of solar flux on the nightside auroral precipit ...

Zhou, Su; Luan, Xiaoli; Dou, Xiankang;

Published by: Journal of Geophysical Research: Space Physics      Published on: 02/2016

YEAR: 2016     DOI: 10.1002/2015JA021865

auroral conjugate effects; auroral geomagnetic activity variation; auroral imaging scaling; auroral solar cycle variation

Universal time variations of the auroral hemispheric power and their interhemispheric asymmetry from TIMED/GUVI observations

This paper quantitatively analyzes the auroral hemispheric power (HP) and its interhemispheric asymmetry as a function of universal time (UT) for geomagnetically quiet conditions (Kp 1\textendash3) from Thermosphere Ionosphere Mesosphere Energetics and Dynamics/Global Ultraviolet Imager (TIMED/GUVI) imaging observations. The HP variation with UT can be approximately characterized as two cases: One is for similar HP variations in the equinoxes in the Northern Hemisphere and for the June solstices of both hemispher ...

Luan, Xiaoli; Wang, Wenbin; Burns, Alan; Dou, Xiankang;

Published by: Journal of Geophysical Research: Space Physics      Published on: 01/2016

YEAR: 2016     DOI: 10.1002/2016JA022730

2015

Characteristics of ionospheric north-south asymmetry and their relationship with irregularity

Using the empirical ionospheric model, the flux-tube integrated electron density and the ratio between the F-region Pedersen conductivity and the total E- and F-region Pedersen conductivity are calculated to investigate the characteristics of the ionospheric asymmetry after sunset during a solar cycle. Furthermore, two indices representing the asymmetric strength of the parameters respectively are defined to study its relationship with the occurrences of the irregularities during different seasons and with different solar ...

Luo, Weihua; Zhu, Zhengping; Lan, Jiaping; Li, Xuejing;

Published by: Wuhan University Journal of Natural Sciences      Published on: 06/2015

YEAR: 2015     DOI: 10.1007/s11859-015-1088-7

asymmetry; Electron density; Ionosphere; irregularity; Pedersen conductivity

Longitudinal variations of the nighttime E layer electron density in the auroral zone

Longitudinal variations of the nighttime E layer electron density (21:00\textendash03:00 magnetic local time) in the auroral zone are investigated, and their sources are discussed in terms of auroral precipitation and solar radiation. The electron density data used in this study are retrieved from Constellation Observing System for Meteorology, Ionosphere, and Climate radio occultation observations during 2006\textendash2009 under quiet geomagnetic activity (Kp <= 3) and solar minimum conditions. The mai ...

Luan, Xiaoli; Wang, Wenbin; Dou, Xiankang; Burns, Alan; Yue, Xinan;

Published by: Journal of Geophysical Research: Space Physics      Published on: 01/2015

YEAR: 2015     DOI: 10.1002/2014JA020610

auroral E layer; hemispheric asymmetry; longitudinal variations; Seasonal variations

2014

Simulations of the equatorial thermosphere anomaly: Geomagnetic activity modulation

The modulation of geomagnetic activity on the equatorial thermosphere anomaly (ETA) in thermospheric temperature under the high solar activity condition is investigated using the Thermosphere Ionosphere Electrodynamics General Circulation Model simulations. The model simulations during the geomagnetically disturbed interval, when the north-south component of the interplanetary magnetic field (Bz) oscillates between southward and northward directions, are analyzed and also compared with those under the ...

Lei, Jiuhou; Wang, Wenbin; Thayer, Jeffrey; Luan, Xiaoli; Dou, Xiankang; Burns, Alan; Solomon, Stanley;

Published by: Journal of Geophysical Research: Space Physics      Published on: 08/2014

YEAR: 2014     DOI: 10.1002/2014JA020152

equatorial thermosphere anomaly; geomagnetic activity; ion-neutral coupling; positive ionospheric storm

Solar filament impact on 21 January 2005: Geospace consequences

On 21 January 2005, a moderate magnetic storm produced a number of anomalous features, some seen more typically during superstorms. The aim of this study is to establish the differences in the space environment from what we expect (and normally observe) for a storm of this intensity, which make it behave in some ways like a superstorm. The storm was driven by one of the fastest interplanetary coronal mass ejections in solar cycle 23, containing a piece of the dense erupting solar filament material. The momentum of the mas ...

Kozyra, J.; Liemohn, M.; Cattell, C.; De Zeeuw, D.; Escoubet, C.; Evans, D.; Fang, X.; Fok, M.-C.; Frey, H.; Gonzalez, W.; Hairston, M.; Heelis, R.; Lu, G.; Manchester, W.; Mende, S.; Paxton, L.; Rastaetter, L.; Ridley, A.; Sandanger, M.; Soraas, F.; Sotirelis, T.; Thomsen, M.; Tsurutani, B.; Verkhoglyadova, O.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 07/2014

YEAR: 2014     DOI: 10.1002/2013JA019748

cold dense plasma sheet; Equatorial anomaly; magnetotail; precipitation; prompt penetration electric field; solar filament

2013

Annual asymmetry in thermospheric density: Observations and simulations

[1]\ In this paper, the Challenging Minisatellite Payload (CHAMP) and Gravity Recovery and Climate Experiment (GRACE) observations during 2002\textendash2010 are utilized to study the variation of the annual asymmetry in thermospheric density at 400 km under low solar activity condition (F10.7 = 80) based on the method of empirical orthogonal functions (EOFs). The derived asymmetry index (AI) in thermospheric density from the EOF analysis shows a strong latitudinal variation at night but varies a little with ...

Lei, Jiuhou; Dou, Xiankang; Burns, Alan; Wang, Wenbin; Luan, Xiaoli; Zeng, Zhen; Xu, JiYao;

Published by: Journal of Geophysical Research: Space Physics      Published on: 05/2013

YEAR: 2013     DOI: 10.1002/jgra.50253

Annual asymmetry; Empirical orthogonal functions; Sun-Earth distance; Upper thermosphere

Geomagnetic and auroral activity driven by corotating interaction regions during the declining phase of Solar Cycle 23

A superposed epoch analysis is performed to investigate the relative impact of the solar wind/interplanetary magnetic field (IMF) on geomagnetic activity, auroral hemispheric power, and auroral morphology during corotating interaction regions (CIRs) events between 2002 and 2007, when auroral images from Thermosphere Ionosphere Mesosphere Energetics and Dynamics/Global Ultraviolet Imager were available. Four categories of CIRs have been compared. These were classified by the averaged IMF Bz and the time of maximum solar wi ...

Luan, Xiaoli; Wang, Wenbin; Lei, Jiuhou; Burns, Alan; Dou, Xiankang; Xu, JiYao;

Published by: Journal of Geophysical Research: Space Physics      Published on: 03/2013

YEAR: 2013     DOI: 10.1002/jgra.50195

auroral morphology; corotating interaction regions; solar wind/IMF forcing

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:

YEAR: 2013     DOI:

2012

Ionospheric and thermospheric variations associated with prompt penetration electric fields

Lu, G.; Goncharenko, L.; Nicolls, M.; Maute, A.; Coster, A.; Paxton, L.;

Published by: Journal of Geophysical Research      Published on: Jan-01-2012

YEAR: 2012     DOI: 10.1029/2012JA017769

Polar cap arcs from the magnetosphere to the ionosphere: kinetic modelling and observations by Cluster and TIMED

Maggiolo, R.; Echim, M.; Wedlund, Simon; Zhang, Y.; Fontaine, D.; Lointier, G.; Trotignon, J.-G.;

Published by: Annales Geophysicae      Published on: Jan-01-2012

YEAR: 2012     DOI: 10.5194/angeo-30-283-2012

Bright polar mesospheric clouds formed by main engine exhaust from the space shuttle\textquoterights final launch

Stevens, Michael; Lossow, Stefan; Fiedler, Jens; Baumgarten, Gerd; übken, Franz-Josef; Hallgren, Kristofer; Hartogh, Paul; Randall, Cora; Lumpe, Jerry; Bailey, Scott; Niciejewski, R.; Meier, R.; Plane, John; Kochenash, Andrew; Murtagh, Donal; Englert, Christoph;

Published by: Journal of Geophysical Research: Atmospheres      Published on: Apr-10-2013

YEAR: 2012     DOI: 10.1029/2012JD017638

2011

Evolution in space and time of the quasi-static acceleration potential of inverted-V aurora and its interaction with Alfv\ enic boundary processes

Marklund, G.; Sadeghi, S.; Cumnock, J.; Karlsson, T.; Lindqvist, P.-A.; Nilsson, H.; Masson, A.; Fazakerley, A.; Lucek, E.; Pickett, J.; Zhang, Y.;

Published by: Journal of Geophysical Research      Published on: Jan-01-2011

YEAR: 2011     DOI: 10.1029/2011JA016537

Evolution in space and time of the quasi-static acceleration potential of inverted-V aurora and its interaction with Alfv\ enic boundary processes

Marklund, G.; Sadeghi, S.; Cumnock, J.; Karlsson, T.; Lindqvist, P.-A.; Nilsson, H.; Masson, A.; Fazakerley, A.; Lucek, E.; Pickett, J.; Zhang, Y.;

Published by: Journal of Geophysical Research      Published on: Jan-01-2011

YEAR: 2011     DOI: 10.1029/2011JA016537

Longitudinal variations of nighttime electron auroral precipitation in both the Northern and Southern hemispheres from the TIMED global ultraviolet imager

Luan, Xiaoli; Wang, Wenbin; Burns, Alan; Solomon, Stanley; Zhang, Yongliang; Paxton, L.; Xu, JiYao;

Published by: Journal of Geophysical Research      Published on: Jan-01-2011

YEAR: 2011     DOI: 10.1029/2010JA016051

Rapid recovery of thermosphere density during the October 2003 geomagnetic storms

Lei, Jiuhou; Thayer, Jeffrey; Lu, Gang; Burns, Alan; Wang, Wenbin; Sutton, Eric; Emery, Barbara;

Published by: Journal of Geophysical Research      Published on: Jan-01-2011

YEAR: 2011     DOI: 10.1029/2010JA016164

Reversed two-cell convection in the Northern and Southern hemispheres during northward interplanetary magnetic field

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

2010

Program of transient UV event research at Tatiana-2 satellite

Garipov, G.; Khrenov, B.; Klimov, P.; Morozenko, V.; Panasyuk, M.; Petrova, S.; Tulupov, V.; Shahparonov, V.; Svertilov, S.; Vedenkin, N.; Yashin, I.; Jeon, J.; Jeong, S.; Jung, A.; Kim, J.; Lee, J.; Lee, H; Na, G.; Nam, J.; Nam, S.; Park, I.; Suh, J.; Jin, J; Kim, M.; Kim, Y.; Yoo, B.; Park, Y.-S.; Yu, H.; Lee, C.-H.; Park, J.; Salazar, H.; Martinez, O.; Ponce, E.; Cotsomi, J.;

Published by: Journal of Geophysical Research      Published on: Jan-01-2010

YEAR: 2010     DOI: 10.1029/2009JA014765

Seasonal and hemispheric variations of the total auroral precipitation energy flux from TIMED/GUVI

Luan, Xiaoli; Wang, Wenbin; Burns, Alan; Solomon, Stanley; Zhang, Yongliang; Paxton, L.;

Published by: Journal of Geophysical Research      Published on: Jan-01-2010

YEAR: 2010     DOI: 10.1029/2009JA015063

Wind and temperature effects on thermosphere mass density response to the November 2004 geomagnetic storm

Lei, Jiuhou; Thayer, Jeffrey; Burns, Alan; Lu, Gang; Deng, Yue;

Published by: Journal of Geophysical Research      Published on: Jan-01-2010

YEAR: 2010     DOI: 10.1029/2009JA014754

Integrating the Sun-Earth System for the Operational Environment (ISES-OE)

Lean, J.; Huba, J.; McDonald, S.; Slinker, S.; Drob, D.; Emmert, J.; Meier, R.; Picone, J.; Joyce, G.; Krall, J.; Stephan, A.; Roach, K.; Knight, H.; Plunkett, S.; Wu, C.-C.; Wood, B.; Wang, Y.-M.; Howard, R.; Chen, J.; Bernhardt, P.; Fedder, J.;

Published by:       Published on:

YEAR: 2010     DOI:

2009

Unusual declining phase of solar cycle 23: Weak semi-annual variations of auroral hemispheric power and geomagnetic activity

Luan, Xiaoli; Wang, Wenbin; Burns, Alan; Solomon, Stanley; Zhang, Yongliang; Paxton, L.;

Published by: Geophysical Research Letters      Published on: Jan-01-2009

YEAR: 2009     DOI: 10.1029/2009GL040825

2008

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

GPS observations of the ionospheric F2-layer behavior during the 20th November 2003 geomagnetic storm over South Korea

The ionospheric F2-layer peak density (NmF2) and its height (hmF2) are of great influence on the shape of the ionospheric electron density profile Ne (h) and may be indicative of other physical processes within the ionosphere, especially those due to geomagnetic storms. Such parameters are often estimated using models such as the semiempirical international reference ionosphere (IRI) models or are measured using moderately priced to expensive instrumentation, such as ionosondes or incoherent scatter radars. Global positio ...

Jin, Shuanggen; Luo, O.; Park, P.;

Published by: Journal of Geodesy      Published on: 03/2008

YEAR: 2008     DOI: 10.1007/s00190-008-0217-x

F2-layer; geomagnetic storm; GPS; Ionosphere; Tomography

2007

Prelude to THEMIS tail conjunction study

T. Y. Lui, Anthony; Zheng, Yihua; Zhang, Yongliang; Angelopoulos, VASSILIS; Parks, GeorgeK; Mozer, FORREST; Rème, Henry; Kistler, LYNN; Dunlop, Malcom; Gustafsson, Georg; Henderson, M.;

Published by:       Published on:

YEAR: 2007     DOI:

2006

Equatorial plasma bubbles in the ionosphere over Eritrea: occurrence and drift speed

Wiens, R.; Ledvina, B.; Kintner, P.; Afewerki, M.; Mulugheta, Z.;

Published by: Annales Geophysicae      Published on: Jan-01-2006

YEAR: 2006     DOI: 10.5194/angeo-24-1443-2006

The HEX experiment: Determination of the neutral wind field from 120 to 185 km altitude near a stable premidnight auroral arc by triangulating the drift of rocket-deployed chemical trails

Wescott, E.; Stenbaek-Nielsen, H.; Conde, M.; Larsen, Miguel; Lummerzheim, Dirk;

Published by: Journal of Geophysical Research      Published on: Jan-01-2006

YEAR: 2006     DOI: 10.1029/2005JA011002

An unusual nightside distortion of the auroral oval: TIMED/GUVI and IMAGE/FUV observations

Zhang, Y; Paxton, LJ; Lui, ATY;

Published by: Journal of Geophysical Research: Space Physics (1978\textendash2012)      Published on:

YEAR: 2006     DOI:

2005

Energy transport in the thermosphere during the solar storms of April 2002

Mlynczak, Martin; Martin-Torres, Javier; Crowley, Geoff; Kratz, David; Funke, Bernd; Lu, Gang; Lopez-Puertas, Manuel; Russell, James; Kozyra, Janet; Mertens, Chris; Sharma, Ramesh; Gordley, Larry; Picard, Richard; Winick, Jeremy; Paxton, L.;

Published by: Journal of Geophysical Research      Published on: Jan-01-2005

YEAR: 2005     DOI: 10.1029/2005JA011141

Large-scale variations of the low-latitude ionosphere during the October\textendashNovember 2003 superstorm: Observational results

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

Introduction to violent Sun-Earth connection events of October\textendashNovember 2003

The solar-terrestrial events of late October and early November 2003, popularly referred to as the Halloween storms, represent the best observed cases of extreme space weather activity observed to date and have generated research covering multiple aspects of solar eruptions and their space weather effects. In the following article, which serves as an abstract for this collective research, we present highlights taken from 61 of the 74 papers from the Journal of Geophysical Research, Geophysical Research Letter ...

Gopalswamy, N.; Barbieri, L.; Cliver, E.; Lu, G.; Plunkett, S.; Skoug, R.;

Published by: Journal of Geophysical Research      Published on: 09/2005

YEAR: 2005     DOI: 10.1029/2005JA011268

coronal mass ejections; Geomagnetic storms; interplanetary shocks; solar energetic particles; Solar flares; superstorms

Introduction to violent Sun-Earth connection events of October\textendashNovember 2003

The solar-terrestrial events of late October and early November 2003, popularly referred to as the Halloween storms, represent the best observed cases of extreme space weather activity observed to date and have generated research covering multiple aspects of solar eruptions and their space weather effects. In the following article, which serves as an abstract for this collective research, we present highlights taken from 61 of the 74 papers from the Journal of Geophysical Research, Geophysical Research Letter ...

Gopalswamy, N.; Barbieri, L.; Cliver, E.; Lu, G.; Plunkett, S.; Skoug, R.;

Published by: Journal of Geophysical Research      Published on: 09/2005

YEAR: 2005     DOI: 10.1029/2005JA011268

coronal mass ejections; Geomagnetic storms; interplanetary shocks; solar energetic particles; Solar flares; superstorms

Undulations on the equatorward edge of the diffuse proton aurora: TIMED/GUVI observations

Undulations on the equatorward edge of the diffuse proton aurora have been identified by using TIMED/GUVI auroral images in the far ultraviolet wavelengths. While undulations have been previously reported on the duskside (Lui et al., 1982), GUVI observations show the undulation also occurs in the dayside, nightside, and morningside. The GUVI proton auroral images provide direct optical evidence that the undulations occur in the proton aurora. It is also the first detection of the undulation in the dayside indicating stron ...

Zhang, Y.; Paxton, L.; Morrison, D.; T. Y. Lui, A.; Kil, H.; Wolven, B.; Meng, C.-I.; Christensen, A.;

Published by: Journal of Geophysical Research      Published on: 09/2005

YEAR: 2005     DOI: 10.1029/2004JA010668

auroral undulation; K-H instability; Magnetic storm; plasma convection

2004

Contribution of proton precipitation to space-based auroral FUV observations

Imaging from space offers a unique way to access the global picture, and its temporal variability, of the particle energy input over the auroral ovals. Electron characteristics are inferred from the analysis of auroral images taken from space in two different spectral bands in UV or visible. Usually, only the electron component of the precipitation is considered, as most of the particle energy is carried by electrons. However, at some locations and certain times protons are a major energy source, that is, a major ionizati ...

Galand, M.; Lummerzheim, D.;

Published by: Journal of Geophysical Research      Published on: 03/2004

YEAR: 2004     DOI: 10.1029/2003JA010321

auroral protons; FUV



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