Bibliography
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Found 193 entries in the Bibliography.
Showing entries from 151 through 193
| 2013 |
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The global configuration of the geomagnetic field shows that the maximum east-west difference in geomagnetic declination of northern middle latitude lies in the US region (~32\textdegree), which produces the significant ionospheric east-west coast difference in terms of total electron content first revealed by Zhang et al. (2011). For verification, it is valuable to investigate this feature over the Far East area, which also shows significant geomagnetic declination east-west gradient but smaller (~15\textdegree) than that of the US. The current study provides evidence of the longitudinal change supporting the thermospheric zonal wind mechanism by examining the climatology of peak electron density (NmF2), electron density (Ne) of different altitudes in the Far East regions with a longitude separation of up to 40\textendash60\textdegree based on ground ionosonde and space-based measurements. Although the east-west difference (Rew) over the Far East area displays a clear diurnal variation similar to the US feature, that is negative Rew (West Ne \> East Ne) in the noon and positive at evening-night, the observational results reveal more differences including: (1) The noontime negative Rew is most pronounced in April\textendashJune while in the US during February\textendashMarch. Thus, for the late spring and summer period negative Rew over the Far East region is more significant than that of the US. (2) The positive Rew at night is much less evident than in the US, especially without winter enhancement. (3) The magnitude of negative Rew tends to enhance toward solar maximum while in the US showing anticorrelation with the solar activity. The altitude distribution of pronounced negative difference (300\textendash400 km) moves upward as the solar flux increases and hence produces the different solar activity dependence at different altitude. The result in the paper is not simply a comparison corresponding to the US results but raises some new features that are worth further studying and improve our current understanding of ionospheric longitude difference at midlatitude. Zhao, Biqiang; Wang, Min; Wang, Yungang; Ren, Zhipeng; Yue, Xinan; Zhu, Jie; Wan, Weixing; Ning, Baiqi; Liu, Jing; Xiong, Bo; Published by: Journal of Geophysical Research: Space Physics Published on: 01/2013 YEAR: 2013 DOI: 10.1029/2012JA018235 geomagnetic declination; longitudinal variation; midlatitude ionosphere |
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The global configuration of the geomagnetic field shows that the maximum east-west difference in geomagnetic declination of northern middle latitude lies in the US region (~32\textdegree), which produces the significant ionospheric east-west coast difference in terms of total electron content first revealed by Zhang et al. (2011). For verification, it is valuable to investigate this feature over the Far East area, which also shows significant geomagnetic declination east-west gradient but smaller (~15\textdegree) than that of the US. The current study provides evidence of the longitudinal change supporting the thermospheric zonal wind mechanism by examining the climatology of peak electron density (NmF2), electron density (Ne) of different altitudes in the Far East regions with a longitude separation of up to 40\textendash60\textdegree based on ground ionosonde and space-based measurements. Although the east-west difference (Rew) over the Far East area displays a clear diurnal variation similar to the US feature, that is negative Rew (West Ne \> East Ne) in the noon and positive at evening-night, the observational results reveal more differences including: (1) The noontime negative Rew is most pronounced in April\textendashJune while in the US during February\textendashMarch. Thus, for the late spring and summer period negative Rew over the Far East region is more significant than that of the US. (2) The positive Rew at night is much less evident than in the US, especially without winter enhancement. (3) The magnitude of negative Rew tends to enhance toward solar maximum while in the US showing anticorrelation with the solar activity. The altitude distribution of pronounced negative difference (300\textendash400 km) moves upward as the solar flux increases and hence produces the different solar activity dependence at different altitude. The result in the paper is not simply a comparison corresponding to the US results but raises some new features that are worth further studying and improve our current understanding of ionospheric longitude difference at midlatitude. Zhao, Biqiang; Wang, Min; Wang, Yungang; Ren, Zhipeng; Yue, Xinan; Zhu, Jie; Wan, Weixing; Ning, Baiqi; Liu, Jing; Xiong, Bo; Published by: Journal of Geophysical Research: Space Physics Published on: 01/2013 YEAR: 2013 DOI: 10.1029/2012JA018235 geomagnetic declination; longitudinal variation; midlatitude ionosphere |
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Retrieving ionospheric electron density profile from FUV spectral remote sensing measurements WANG, Jing; Tang, Yi; ZHANG, Zhi-Ge; ZHENG, Xu-Li; Ni, Guo-qiang; Published by: Chinese Journal of Geophysics Published on: |
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A Quality Assessment Method for Retrieved O/N\_2 Images from FUV Remote Sensing WANG, Jing; Tang, Yi; Peng, Sheng-feng; ZHENG, Xu-Li; Ni, Guo-qiang; Published by: Infrared Published on: |
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Study on near-far ultraviolet imaging spectrometer with high resolution A near-far ultraviolet imaging spectrometer with high resolution is developed，which can be applied to the upper atmosphere observation in 115nm-295nm. The application demands of the corresponding remote sensing are analyzed. Because the imaging spectrum technology has been rarely utilized for the ionosphere observation in our country, we study some foreign advanced loads to apply the standard to our design. According to the analysis, the optical system of the imaging spectrometer is designed. The system includes an off-axis parabolic mirror as the telescope and Czerny-Turner structure as the imaging spectrum system. The photon counting detector is adopted to satisfy the observation for that the radiation is weak in near-far ultraviolet waveband. The receiving surface of the detector should be coated by different photocathode for better quantum efficiency in the near and far ultraviolet wavebands. The traditional Czerny-Turner system is not suit for the broadband imaging spectrometer because aberrations in the structure can\textquoterightt be corrected homogeneously. The geometric analysis and 1st order differential calculation method are introduced to improve disadvantages based on the aberration theory. We designed an example for the advanced imaging spectrometer. The results demonstrate that the modulation transfer function (MTF) in total field of view and the waveband is more than 0.6. The design has high spatial resolution and high spectral resolution. It certificates that the design theory can be applied to the near-far ultraviolet imaging spectrometer especial for upper atmosphere observation. \textcopyright (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only. Cong, Hai-fang; Wang, Chunhui; Wang, Yu; Published by: Published on: YEAR: 2013 DOI: 10.1117/12.2032920 Imaging spectrometer; Near-far ultraviolet; Spatial resolution; Spectral resolution |
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Study on near-far ultraviolet imaging spectrometer with high resolution A near-far ultraviolet imaging spectrometer with high resolution is developed，which can be applied to the upper atmosphere observation in 115nm-295nm. The application demands of the corresponding remote sensing are analyzed. Because the imaging spectrum technology has been rarely utilized for the ionosphere observation in our country, we study some foreign advanced loads to apply the standard to our design. According to the analysis, the optical system of the imaging spectrometer is designed. The system includes an off-axis parabolic mirror as the telescope and Czerny-Turner structure as the imaging spectrum system. The photon counting detector is adopted to satisfy the observation for that the radiation is weak in near-far ultraviolet waveband. The receiving surface of the detector should be coated by different photocathode for better quantum efficiency in the near and far ultraviolet wavebands. The traditional Czerny-Turner system is not suit for the broadband imaging spectrometer because aberrations in the structure can\textquoterightt be corrected homogeneously. The geometric analysis and 1st order differential calculation method are introduced to improve disadvantages based on the aberration theory. We designed an example for the advanced imaging spectrometer. The results demonstrate that the modulation transfer function (MTF) in total field of view and the waveband is more than 0.6. The design has high spatial resolution and high spectral resolution. It certificates that the design theory can be applied to the near-far ultraviolet imaging spectrometer especial for upper atmosphere observation. \textcopyright (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only. Cong, Hai-fang; Wang, Chunhui; Wang, Yu; Published by: Published on: YEAR: 2013 DOI: 10.1117/12.2032920 Imaging spectrometer; Near-far ultraviolet; Spatial resolution; Spectral resolution |
| 2012 |
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Burns, A.G.; Solomon, S.C.; Qian, L.; Wang, W.; Emery, B.A.; Wiltberger, M.; Weimer, D.R.; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: Jan-07-2012 YEAR: 2012 DOI: 10.1016/j.jastp.2012.02.006 |
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Anomalously low geomagnetic energy inputs during 2008 solar minimum Deng, Yue; Huang, Yanshi; Solomon, Stan; Qian, Liying; Knipp, Delores; Weimer, Daniel; Wang, Jing-Song; Published by: Journal of Geophysical Research Published on: Jan-01-2012 YEAR: 2012 DOI: 10.1029/2012JA018039 |
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Dayside and nightside segments of a polar arc: The particle characteristics Park, J.; Min, K.; Parks, G.; Zhang, Y.; Lee, J.-J.; Baker, J.; Kim, H.; Hwang, J.; Yumoto, K.; Uozumi, T.; Lee, C.; Published by: Journal of Geophysical Research Published on: Jan-01-2012 YEAR: 2012 DOI: 10.1029/2011JA017323 |
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Daytime climatology of ionospheric N m F 2 and h m F 2 from COSMIC data Burns, A.; Solomon, S.; Wang, W.; Qian, L.; Zhang, Y.; Paxton, L.; Published by: Journal of Geophysical Research Published on: Jan-01-2012 YEAR: 2012 DOI: 10.1029/2012JA017529 |
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Solomon, Stanley; Burns, Alan; Emery, Barbara; Mlynczak, Martin; Qian, Liying; Wang, Wenbin; Weimer, Daniel; Wiltberger, Michael; Published by: Journal of Geophysical Research Published on: Jan-01-2012 YEAR: 2012 DOI: 10.1029/2011JA017417 |
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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 thermosphere and ionosphere by using self-consistent solutions for the coupled nonlinear equations of hydrodynamics, neutral and ion chemistry, and electrodynamics. The F3/C EDP are combined with the TIE-GCM simulations by EnKF algorithms implemented in the NCAR Data Assimilation Research Testbed (DART) open-source community facility to compute the expected value of electron density, which is \textquoteleftthe best\textquoteright estimate of the current ionospheric state. Assimilation analyses obtained with real F3/C electron density profiles are compared with independent ground-based observations as well as the F3/C profiles themselves. The comparison shows the improvement of the primary ionospheric parameters, such as NmF2 and hmF2. Nevertheless, some unrealistic signatures appearing in the results and high rejection rates of observations due to the applied outlier threshold and quality control are found in the assimilation experiments. This paper further discusses the limitations of the model and the impact of ensemble member creation approaches on the assimilation results, and proposes possible methods to avoid these problems for future work. 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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The Wind Imaging Interferometer (WINDII) was launched on the NASA\textquoterights Upper Atmosphere Research Satellite on 12 September 1991 and operated until 2003. Its role in the mission was to measure vector winds in the Earth\textquoterights atmosphere from 80 to 110 km, but its measurements extended to nearly 300 km. The approach employed was to measure Doppler shifts from a suite of visible region airglow lines emitted over this altitude range. These included atomic oxygen O(1S) and O(1D) lines, as well as lines in the OH Meinel (8,3) and O2 Atmospheric (0,0) bands. The instrument employed was a Doppler Michelson Interferometer that measured the Doppler shift as a phase shift of the cosinusoidal interferogram generated by single airglow lines. An extensive validation program was conducted after launch to confirm the accuracy of the measurements. The dominant wind field, the first one observed by WINDII, was that of the migrating diurnal tide at the equator. The overall most notable WINDII contribution followed from this: determining the influence of dynamics on the transport of atmospheric species. Currently, nonmigrating tides are being studied in the thermosphere at both equatorial and high latitudes. Other aspects investigated included solar and geomagnetic influences, temperatures from atmospheric-scale heights, nitric oxide concentrations, and the occurrence of polar mesospheric clouds. The results of these observations are reviewed from a perspective of 20 years. A future perspective is then projected, involving more recently developed concepts. It is intended that this description will be helpful for those planning future missions. Shepherd, G.; Thuillier, G.; Cho, Y.-M.; Duboin, M.-L.; Evans, W.; Gault, W.; Hersom, C.; Kendall, D.; Lathuillère, C.; Lowe, R.; McDade, I.; Rochon, Y.; Shepherd, M.; Solheim, B.; Wang, D.-Y.; Ward, W.; Published by: Reviews of Geophysics Published on: 06/2012 YEAR: 2012 DOI: 10.1029/2012RG000390 airglow; dynamics; interferometers; mesosphere; temperature; winds |
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Research on Retrieving Thermospheric O/N2 from FUV Remote Sensing Magnetic storms usually cause significant departures of thermospheric O and N2\ from their normal values. To study the effects on thermospheric neutral species caused by magnetic storms, a method to retrieve thermospheric O/N2\ based on the data obtained from global ultraviolet imager on board TIMED is presented. With the help of AURIC, the normalizations of observing angles and SZAs were preformed to the measurements and a relationship between 135.6/LBHs and O/N2\ was established. Finally, applying the proposed method to retrieve O/N2\ during a magnetic period(29, September\textemdash4, October, 2002), it was shown that magnetic storms could induce significant O/N2\ depletion, extending from the polar regions towards the equator. Peng, S.; Tang, Y.; Wang, J.; Zheng, X.; Published by: Spectroscopy and Spectral Analysis Published on: 05/2012 YEAR: 2012 DOI: 10.3964/j.issn.1000-0593(2012)05-1296-05 |
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Study on Far Ultraviolet Imaging Spectrometer with Grating Dispersion for Atmosphere Remote Sensing The far ultraviolet imaging spectrometer with grating dispersion is mainly used in the detection of the ionosphere, thermosphere, auroral zone and glow zone. It is important for the study and application of the remote sensing of atmosphere in China. We designed two optical systems for the far ultraviolet imaging spectrometer, and obtained the plane grating structure prototype based on the principles of nadir and limb atmospheric sounding. The prototype working at the waveband of 120~180 nm consists of an off-axis parabolic mirror and an advanced Czerny-Turner spectral imaging system. The far ultraviolet response back-illuminating CCD is adopted as the detector. The corresponding experiment system was built to calibrate the basic performances of the spectrometer prototype. The spectral and spatial resolutions are 2 nm and 0.5 mrad respectively. The far ultraviolet imaging spectrometer prototype plays an important role in the study and application of atmospheric remote sensing. Yu, L.; Wang, S.; Lin, G.; Qu, Y.; Wang, L.; Published by: Spectroscopy and Spectral Analysis Published on: 03/2012 |
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Study on Far Ultraviolet Imaging Spectrometer with Grating Dispersion for Atmosphere Remote Sensing The far ultraviolet imaging spectrometer with grating dispersion is mainly used in the detection of the ionosphere, thermosphere, auroral zone and glow zone. It is important for the study and application of the remote sensing of atmosphere in China. We designed two optical systems for the far ultraviolet imaging spectrometer, and obtained the plane grating structure prototype based on the principles of nadir and limb atmospheric sounding. The prototype working at the waveband of 120~180 nm consists of an off-axis parabolic mirror and an advanced Czerny-Turner spectral imaging system. The far ultraviolet response back-illuminating CCD is adopted as the detector. The corresponding experiment system was built to calibrate the basic performances of the spectrometer prototype. The spectral and spatial resolutions are 2 nm and 0.5 mrad respectively. The far ultraviolet imaging spectrometer prototype plays an important role in the study and application of atmospheric remote sensing. Yu, L.; Wang, S.; Lin, G.; Qu, Y.; Wang, L.; Published by: Spectroscopy and Spectral Analysis Published on: 03/2012 |
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The seasonal changes in the relationship between neutral composition and NmF2 from 2002 to 2007 Burns, AG; Solomon, SC; Wang, W; Qian, L; Zhang, Y; Paxton, LJ; Published by: Published on: |
| 2011 |
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Study on spectral broadband aberration-corrected imaging spectrometer for far-ultraviolet waveband Yu, Lei; Wang, Shurong; Qu, Yi; Lin, Guanyu; Published by: Optical Engineering Published on: Jan-06-2011 YEAR: 2011 DOI: 10.1117/1.3591947 |
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FUV spectrum in the polar region during slightly disturbed geomagnetic conditions Lee, C.; Min, K.; Lee, J.-J.; Hwang, J.; Park, J.; Edelstein, J.; Han, W.; Published by: Journal of Geophysical Research Published on: Jan-01-2011 YEAR: 2011 DOI: 10.1029/2011JA016898 |
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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 |
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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 |
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Yu, Lei; Wang, Shu-rong; Qu, Yi; Lin, Guan-yu; Published by: Applied optics Published on: |
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Study on spectrograph for ionosphere: a broadband imaging instrument prototype for far-ultraviolet Yu, Lei; Wang, Shu-rong; Lin, Guan-yu; Published by: Published on: |
| 2010 |
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study of ionospheric response to magnetic superstorms in the East Asian sector Pirog, O.M.; Polekh, N.M.; Romanova, E.B.; Zherebtsov, G.A.; Shi, Jiankui; Wang, Xiao; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: Jan-02-2010 YEAR: 2010 DOI: 10.1016/j.jastp.2009.11.004 |
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Ionospheric response to the initial phase of geomagnetic storms: Common features Wang, Wenbin; Lei, Jiuhou; Burns, Alan; Solomon, Stanley; Wiltberger, Michael; Xu, JiYao; Zhang, Yongliang; Paxton, L.; Coster, Anthea; Published by: Journal of Geophysical Research Published on: Jan-01-2010 YEAR: 2010 DOI: 10.1029/2009JA014461 |
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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 |
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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: |
| 2009 |
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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 |
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The Ionospheric Mid-Latitude Summer Nighttime Anomaly This paper presents monthly variations of the mid-latitude summer nighttime anomaly (MSNA) of the ionosphere for the first time by using global observations of the FORMOSAT-3/COSMIC (F3/C), NASA TIMED-GUVI, ground-based radars and GPS receiver network. The MSNA is characterized by greater nighttime (19:00 LT - 24:00 LT, or period of larger solar zenith angles) ionospheric electron density than that during daytime (08:00 - 18:00 LT, or period of smaller solar zenith angles) at middle latitudes during solstices. The anomaly shown in the southern hemisphere during December solstice was previously known as the Weddell Sea Anomaly (WSA) occurring around the Antarctica and the nearby Pacific Ocean, while a WSA-like electron density structure also occurs in the northern hemisphere around June solstice. This study demonstrates that the anomalies occurred in both the northern and southern hemispheres share similar character of greater nighttime density. Moreover, the latitude-altitude cross-section plots of the electron density structure show very similar time-varying electron density evolutions of the MSNA. In both hemispheres, the anomalies with similar electron density characteristics and variations caused by the similar mechanism prompts us to name this phenomenon the mid-latitude summer nighttime anomaly. Lin, C; Chen, C; Hsu, M; Liu, CH; Liu, JG; Burns, AG; Wang, W; Published by: Published on: |
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Design of FUV imaging spectrometer based on crossed Czerny-Turner structure This article describes the characteristics of the far ultraviolet (FUV) radiation and its applications in the space weather s research and prediction. The FUV imaging spectrometer is irreplaceable to get the FUV radiation data of the earth s upper atmosphere. Some key technologies of FUV spectrometer are analyzed respectively, including window materials, FUV light source, FUV detectors and FUV coating, which offer theoretical foundation for FUV imaging spectrometer. The paper presents a FUV band imaging spectrometer s optical system which is based on crossed Czerny-Turner structure with all reflective components in it. The wavelength range of the FUV spectrometer optical system is from 100nm to 200nm and the initial structure is simulated and optimized by Zemax in order to improve the spectral resolution. The theoretical spectral resolution of the system is better than 1nm, and it has a certain imaging capacity. Wu, Yan; Tang, Yi; Ni, Guoqiang; Sheng, Yunlong; Wang, Yongtian; Zeng, Lijiang; Published by: Published on: YEAR: 2009 DOI: 10.1117/12.806967 space weather; far ultraviolet; Imaging spectrometer; crossed Czerny-Turner system; optical design |
| 2008 |
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Zhao, B; Wan, W; Liu, L; Mao, T; Ren, Z; Wang, M; Christensen, AB; Published by: Published on: |
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Variations of Auroral Electron Precipitation Measured by TIMED/GUVI Luan, X; Wang, W; Burns, A; Zhang, Y; Solomon, S; Published by: Published on: |
| 2007 |
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The ionospheric and thermospheric response to CMEs: Challenges and successes Burns, A.G.; Solomon, S.C.; Wang, W.; Killeen, T.L.; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: Jan-02-2007 YEAR: 2007 DOI: 10.1016/j.jastp.2006.06.010 |
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Zhao, B.; Wan, W.; Liu, L.; Mao, T.; Ren, Z.; Wang, M.; Christensen, A.; Published by: Annales Geophysicae Published on: Jan-01-2007 YEAR: 2007 DOI: 10.5194/angeo-25-2513-2007 |
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Lin, C.; Wang, W.; Hagan, M.; Hsiao, C.; Immel, T.; Hsu, M.; Liu, J; Paxton, L.; Fang, T.; Liu, C.; Published by: Geophysical Research Letters Published on: Jan-01-2007 YEAR: 2007 DOI: 10.1029/2007GL029265 |
| 2006 |
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Burns, AG; Wang, W; Killeen, TL; Solomon, SC; Wiltberger, M; Published by: Journal of Geophysical Research: Space Physics Published on: |
| 2005 |
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Global patterns of Joule heating in the high-latitude ionosphere A compiled empirical global Joule heating (CEJH) model is described in this study. This model can be used to study Joule heating patterns, Joule heating power, potential drop, and polar potential size in the high-latitude ionosphere and thermosphere, and their variations with solar wind conditions, geomagnetic activities, the solar EUV radiation, and the neutral wind. It is shown that the interplanetary magnetic field (IMF) orientation and its magnitude, the solar wind speed, AL index, geomagnetic Kp index, and solar radio flux F10.7 index are important parameters that control Joule heating patterns, Joule heating power, potential drop, and polar potential size. Other parameters, such as the solar wind number density (Nsw) and Earth\textquoterights dipole tilt, do not significantly affect these quantities. It is also shown that the neutral wind can increase or reduce the Joule heating production, and its effectiveness mainly depends on the IMF orientation and its magnitude, the solar wind speed, AL index, Kp index, and F10.7 index. Our results indicate that for less disturbed solar wind conditions, the increase or reduction of the neutral wind contribution to the Joule heating is not significant compared to the convection Joule heating, whereas under extreme solar wind conditions, the neutral wind can significantly contribute to the Joule heating. Application of the CEJH model to the 16 July 2000 storm implies that the model outputs are basically consistent with the results from the AMIE mapping procedure. The CEJH model can be used to examine large-scale energy deposition during disturbed solar wind conditions and to study the dependence of the hemispheric Joule heating on the level of geomagnetic activities and the intensity of solar EUV radiation. This investigation enables us to predict global Joule heating patterns for other models in the high-latitude ionosphere and thermosphere in the sense of space weather forecasting. Zhang, X.; Wang, C.; Chen, T.; Wang, Y.; Tan, A.; Wu, T.; Germany, G.; Wang, W.; Published by: Journal of Geophysical Research Published on: 12*2005 YEAR: 2005 DOI: 10.1029/2005JA011222 electric fields; magnetosphere/ionosphere interaction; Modeling and forecasting; particle precipitation; polar cap ionosphere; solar radiation and cosmic ray effects |
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Global patterns of Joule heating in the high-latitude ionosphere A compiled empirical global Joule heating (CEJH) model is described in this study. This model can be used to study Joule heating patterns, Joule heating power, potential drop, and polar potential size in the high-latitude ionosphere and thermosphere, and their variations with solar wind conditions, geomagnetic activities, the solar EUV radiation, and the neutral wind. It is shown that the interplanetary magnetic field (IMF) orientation and its magnitude, the solar wind speed, AL index, geomagnetic Kp index, and solar radio flux F10.7 index are important parameters that control Joule heating patterns, Joule heating power, potential drop, and polar potential size. Other parameters, such as the solar wind number density (Nsw) and Earth\textquoterights dipole tilt, do not significantly affect these quantities. It is also shown that the neutral wind can increase or reduce the Joule heating production, and its effectiveness mainly depends on the IMF orientation and its magnitude, the solar wind speed, AL index, Kp index, and F10.7 index. Our results indicate that for less disturbed solar wind conditions, the increase or reduction of the neutral wind contribution to the Joule heating is not significant compared to the convection Joule heating, whereas under extreme solar wind conditions, the neutral wind can significantly contribute to the Joule heating. Application of the CEJH model to the 16 July 2000 storm implies that the model outputs are basically consistent with the results from the AMIE mapping procedure. The CEJH model can be used to examine large-scale energy deposition during disturbed solar wind conditions and to study the dependence of the hemispheric Joule heating on the level of geomagnetic activities and the intensity of solar EUV radiation. This investigation enables us to predict global Joule heating patterns for other models in the high-latitude ionosphere and thermosphere in the sense of space weather forecasting. Zhang, X.; Wang, C.; Chen, T.; Wang, Y.; Tan, A.; Wu, T.; Germany, G.; Wang, W.; Published by: Journal of Geophysical Research Published on: 12*2005 YEAR: 2005 DOI: 10.1029/2005JA011222 electric fields; magnetosphere/ionosphere interaction; Modeling and forecasting; particle precipitation; polar cap ionosphere; solar radiation and cosmic ray effects |
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Global patterns of Joule heating in the high-latitude ionosphere A compiled empirical global Joule heating (CEJH) model is described in this study. This model can be used to study Joule heating patterns, Joule heating power, potential drop, and polar potential size in the high-latitude ionosphere and thermosphere, and their variations with solar wind conditions, geomagnetic activities, the solar EUV radiation, and the neutral wind. It is shown that the interplanetary magnetic field (IMF) orientation and its magnitude, the solar wind speed, AL index, geomagnetic Kp index, and solar radio flux F10.7 index are important parameters that control Joule heating patterns, Joule heating power, potential drop, and polar potential size. Other parameters, such as the solar wind number density (Nsw) and Earth\textquoterights dipole tilt, do not significantly affect these quantities. It is also shown that the neutral wind can increase or reduce the Joule heating production, and its effectiveness mainly depends on the IMF orientation and its magnitude, the solar wind speed, AL index, Kp index, and F10.7 index. Our results indicate that for less disturbed solar wind conditions, the increase or reduction of the neutral wind contribution to the Joule heating is not significant compared to the convection Joule heating, whereas under extreme solar wind conditions, the neutral wind can significantly contribute to the Joule heating. Application of the CEJH model to the 16 July 2000 storm implies that the model outputs are basically consistent with the results from the AMIE mapping procedure. The CEJH model can be used to examine large-scale energy deposition during disturbed solar wind conditions and to study the dependence of the hemispheric Joule heating on the level of geomagnetic activities and the intensity of solar EUV radiation. This investigation enables us to predict global Joule heating patterns for other models in the high-latitude ionosphere and thermosphere in the sense of space weather forecasting. Zhang, X.; Wang, C.; Chen, T.; Wang, Y.; Tan, A.; Wu, T.; Germany, G.; Wang, W.; Published by: Journal of Geophysical Research Published on: 12*2005 YEAR: 2005 DOI: 10.1029/2005JA011222 electric fields; magnetosphere/ionosphere interaction; Modeling and forecasting; particle precipitation; polar cap ionosphere; solar radiation and cosmic ray effects |
| 2004 |
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Development of the global assimilative ionospheric model Wang, Chunming; Hajj, George; Pi, Xiaoqing; Rosen, Gary; Wilson, Brian; Published by: Radio Science Published on: |
| 2003 |
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Assimilation of Space-Based Ultraviolet Data Into a Recursive Global Ionospheric Model Kamalabadi, F; Hajj, G; Pi, X; Wang, C; Wilson, B; Published by: Published on: |
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No Slide Title Page 1 Results from CHAMP, SAC/C and IOX GPS Ionospheric Occultations Obtained by the Abel Inversion and Data Assimilation Lukas Mandrake, JPL George Hajj, JPL Mandrake, Lukas; Hajj, George; Iijima, Byron; Pi, Xiaoqing; Rosen, Gary; Straus, Paul; Wang, Chunming; Wilson, Brian; Published by: Published on: |
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Multi-resolution atmospheric modeling Baer, F; Tribbia, J; Fournier, A; Wang, H; Published by: Published on: |