Article
Astronomy & Astrophysics
Loren C. Chang, Cornelius Csar Jude H. Salinas, Yi-Chung Chiu, McArthur Jones, P. K. Rajesh, Chi-Kuang Chao, Jann-Yenq Liu, Charles C. H. Lin, Tung-Yuan Hsiao
Summary: Equatorial plasma bubbles (EPBs) are plasma depletions in the nighttime ionospheric F region that cause scintillation in satellite signals. The occurrence of EPBs is found to be higher during solstice in the central Pacific and African sectors. Satellite observations and numerical experiments support the hypothesis that atmospheric tides with zonal wavenumber 2 precondition the nighttime ionosphere to favor higher EPB growth rates in these regions.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Gabriel Soares, Yosuke Yamazaki, Achim Morschhauser, Jurgen Matzka, Katia J. Pinheiro, Claudia Stolle, Patrick Alken, Akimasa Yoshikawa, Kornyanat Hozumi, Atul Kulkarni, Pornchai Supnithi
Summary: This study proposes a new technique for modeling the equatorial electrojet (EEJ) based on principal component analysis (PCA) and compares its performance with existing models. By using ground-satellite geomagnetic data, the researchers successfully determine the amplitudes of solar tides and find a remarkable correlation between tidal signatures in the EEJ and tidal signatures derived from neutral atmosphere temperature observations. The results of the study suggest that meaningful EEJ spectra related to solar tides can be obtained even with relatively short observation periods.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Jianyuan Wang, Wen Yi, Jianfei Wu, Tingdi Chen, Xianghui Xue, Jie Zeng, Robert A. Vincent, Iain M. Reid, Paulo P. Batista, Ricardo A. Buriti, Toshitaka Tsuda, Nicholas J. Mitchell, Xiankang Dou
Summary: This study presents the analysis of migrating tidal winds in the equatorial mesosphere and lower thermosphere using multiple meteor radars. The results show that the radars observed the important components of diurnal and semidiurnal solar migrating tides. These observations are consistent with the predictions of the climatological tidal model. Additionally, the study finds unusually strong tidal amplitudes in January-February 2006, possibly as a result of the stratospheric sudden warming event in the Northern Hemisphere.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Xiaohua Fang, Jeffrey M. Forbes, Quan Gan, Guiping Liu, Scott Thaller, Stephen Bougher, Laila Andersson, Mehdi Benna, Francis Eparvier, Yingjuan Ma, David Pawlowski, Scott England, Bruce Jakosky
Summary: Longitudinal structures in the Martian thermosphere and topside ionosphere show persistent and pronounced tidal oscillations between 150 and 200 km altitudes, with density variations generally in-phase. Analysis of observational data provides evidence for thermosphere-ionosphere coupling through atmospheric tides, modulating the ionosphere via upward-propagating thermal tides and photochemical reactions. Atmospheric tides constitute a significant perturbation source to the ionospheric electron density, up to 15% near 200 km.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2021)
Article
Geochemistry & Geophysics
Joonas Leino, Ari-Matti Harri, Don Banfield, Manuel de la Torre Juarez, Mark Paton, Jose-Antonio Rodriguez-Manfredi, Mark Lemmon, Hannu Savijarvi
Summary: Diurnal solar radiation leads to global oscillations in pressure, temperature, and wind fields, known as atmospheric tides, which are further influenced by topography, surface properties, and atmospheric dust loading. Analyzing the diurnal and semi-diurnal components of atmospheric surface pressure on Mars provides insights into the characteristics and variations of atmospheric tides.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Article
Astronomy & Astrophysics
Weixing Wan, Xu Zhou, Xinan Yue, Yong Wei, Feng Ding, Zhipeng Ren
Summary: This study investigates the relationship between the ionospheric longitudinal wave-3 (WN3) structure and atmospheric tides using data from Mars observations. The results show that the altitude variation of the ionosphere is influenced by the electron density gradient, and the observations are consistent with the theoretical predictions.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2022)
Article
Geochemistry & Geophysics
Joonas Leino, Ari-Matti Harri, Don Banfield, Manuel de la Torre Juarez, Mark Paton, Jose-Antonio Rodriguez-Manfredi, Mark Lemmon, Hannu Savijarvi
Summary: This study analyzes atmospheric tides on Mars and compares the data from the InSight and MSL platforms. The results show that atmospheric tides on Mars are influenced by topography and dust loading, and both platforms observe similar responses between harmonic components and dust loading.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Article
Astronomy & Astrophysics
Weijun Hou, Buyun Xu, Hongxia Wang, Yihong Li, Xihai Li, Daizhi Liu
Summary: This study uses COSMIC electron density data to examine the spatiotemporal variations of longitudinal structures, showing distinct transformation between wavenumber-4 and wavenumber-3 structures in different seasons.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2021)
Article
Geosciences, Multidisciplinary
Q. Gan, J. Oberheide, L. Goncharenko, L. Qian, J. Yue, W. Wang, W. E. McClintock, R. W. Eastes
Summary: Using data from the GOLD mission, this study investigates the post-sunset ionospheric responses to the September 2019 Antarctic sudden stratospheric warming from a synoptic perspective for the first time. The observations reveal a prevalent quasi-6-day periodicity in the equatorial ionization anomaly region, coinciding with enhanced quasi-6-day wave activity in the mesosphere. The study also uncovers multiple pathways involved in transmitting the periodicity from the middle atmosphere to the post-sunset F-region ionosphere and observes a remarkable depletion in electron density during the period of enhanced wave activity.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Astronomy & Astrophysics
R. W. Eastes, D. K. Karan, C. Martinis, R. E. Daniell, Q. Gan, A. G. Burns, W. E. McClintock
Summary: The Global-scale Observations of the Limb and Disk imager observes the equatorial ionization anomaly (EIA) near sunset from a wide range of geographic longitudes. Monthly averages of EIA crests' latitude (EIA lats) versus longitude during March, September, and December 2020 have been analyzed. The results show that the magnetic equator to subsolar point separation has a more distinct influence on EIA latitudes than winds.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2023)
Article
Geosciences, Multidisciplinary
Guiping Liu, Scott L. England, Chin S. Lin, Nicholas M. Pedatella, Jeffrey H. Klenzing, Christoph R. Englert, Brian J. Harding, Thomas J. Immel, Douglas E. Rowland
Summary: This study reports for the first time the day-to-day variation of the longitudinal structure in height of the F-2 layer (h(m)F(2) in the equatorial ionosphere, and reveals a similar to 3-day modulation and planetary wave activity. These variations are likely caused by the planetary wave-tide interaction.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Astronomy & Astrophysics
Huixin Liu, Yuichi Otsuka, Kornyanat Hozumi, Tao Yu
Summary: This report examines the ground-based total electron content (TEC) in Asian sector during August-October 2019, with a focus on the period of a stratosphere sudden warming (SSW) occurred in Antarctica. The study reveals pronounced ionospheric day-to-day variability with distinct periodicities, including quasi-10 day, quasi-14 day, and quasi-6 day oscillations. The findings demonstrate that low-level geomagnetic activities and mesospheric wind changes during the SSW have significant impacts on TEC, which should not be ignored when studying meteorological effects on the ionosphere.
FRONTIERS IN ASTRONOMY AND SPACE SCIENCES
(2023)
Article
Engineering, Aerospace
Kuldeep Pandey, R. Sekar, D. Chakrabarty, B. G. Anandarao
Summary: This study investigates the variations of the equatorial electrojet (EEJ) using a physics-based model, revealing changes in EEJ characteristics across different longitudes and their correlation with local geomagnetic field, as well as relationships with ionospheric electric field, electron density, and geomagnetic field.Verification of these relationships using earlier EEJ observations suggests potential for a better understanding of low-latitude ionospheric electrodynamics.
ADVANCES IN SPACE RESEARCH
(2021)
Article
Astronomy & Astrophysics
Jeffrey M. Forbes, Xiaoli Zhang, Roderick Heelis, Russell Stoneback, Christoph R. Englert, John M. Harlander, Brian J. Harding, Kenneth D. Marr, Jonathan J. Makela, Thomas J. Immel
Summary: Measurements from the Coincident Ionospheric Connections Explorer (ICON) during January 1-21, 2020 were analyzed to study the relationship between neutral winds and ionospheric variability on a daily basis. The study focused on a specific time interval dominated by the eastward-propagating diurnal tide DE3, with variations in winds and ionospheric parameters attributable to multiple wave interactions. The results show a direct link between day-to-day wave-4 variability in E-region neutral winds and F-region ionospheric drifts and electron densities, modulated by various planetary waves.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2021)
Article
Meteorology & Atmospheric Sciences
Komal Kumari, Haonan Wu, Abigail Long, Xian Lu, Jens Oberheide
Summary: The study investigates the impact mechanisms of the Madden-Julian Oscillation on tides in the mesosphere/lower thermosphere using observations and reanalysis models, finding that tropospheric radiative and latent heating play a more significant role in forcing the tidal MJO response than wind-filtering in the troposphere/stratosphere. Coriolis, pressure gradient, advection, and gravity wave drag forces are identified as important mechanisms for tidal MJO response in the MLT region.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Astronomy & Astrophysics
Paul Withers, C. L. Flynn, M. F. Vogt, M. Mayyasi, P. Mahaffy, M. Benna, M. Elrod, J. P. McFadden, P. Dunn, G. Liu, L. Andersson, S. England
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2019)
Article
Geosciences, Multidisciplinary
R. W. Eastes, S. C. Solomon, R. E. Daniell, D. N. Anderson, A. G. Burns, S. L. England, C. R. Martinis, W. E. McClintock
GEOPHYSICAL RESEARCH LETTERS
(2019)
Article
Astronomy & Astrophysics
Scott L. England, Katelynn R. Greer, Stanley C. Solomon, Richard W. Eastes, William E. McClintock, Alan G. Burns
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2020)
Article
Astronomy & Astrophysics
R. W. Eastes, W. E. McClintock, A. G. Burns, D. N. Anderson, L. Andersson, S. Aryal, S. A. Budzien, X. Cai, M. Codrescu, J. T. Correira, R. E. Daniell, K. F. Dymond, S. L. England, F. G. Eparvier, J. S. Evans, H. Foroosh, Q. Gan, K. R. Greer, D. K. Karan, A. Krywonos, F. Laskar, J. D. Lumpe, C. R. Martinis, J. B. McPhate, J. Oberheide, O. H. Siegmund, S. C. Solomon, V. Veibel, T. N. Woods
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2020)
Article
Geosciences, Multidisciplinary
Chihoko Y. Cullens, Thomas J. Immel, Colin C. Triplett, Yen-Jung Wu, Scott L. England, Jeffrey M. Forbes, Guiping Liu
PROGRESS IN EARTH AND PLANETARY SCIENCE
(2020)
Article
Environmental Sciences
Thomas J. Immel, Richard W. Eastes, William E. McClintock, Steven B. Mende, Harald U. Frey, Colin Triplett, Scott L. England
Article
Geochemistry & Geophysics
Hiromu Nakagawa, Naoki Terada, Sonal K. Jain, Nicholas M. Schneider, Franck Montmessin, Roger Yelle, Fayu Jiang, Loic Verdier, Scott L. England, Kanako Seki, Hitoshi Fujiwara, Takeshi Imamura, Nao Yoshida, Takeshi Kuroda, Kaori Terada, Hannes Groller, Justin Deighan, Bruce M. Jakosky
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2020)
Article
Astronomy & Astrophysics
Deepak K. Karan, Robert E. Daniell, Scott L. England, Carlos R. Martinis, Richard W. Eastes, Alan G. Burns, William E. McClintock
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2020)
Article
Astronomy & Astrophysics
Xiaohua Fang, Jeffrey M. Forbes, Quan Gan, Guiping Liu, Scott Thaller, Stephen Bougher, Laila Andersson, Mehdi Benna, Francis Eparvier, Yingjuan Ma, David Pawlowski, Scott England, Bruce Jakosky
Summary: Longitudinal structures in the Martian thermosphere and topside ionosphere show persistent and pronounced tidal oscillations between 150 and 200 km altitudes, with density variations generally in-phase. Analysis of observational data provides evidence for thermosphere-ionosphere coupling through atmospheric tides, modulating the ionosphere via upward-propagating thermal tides and photochemical reactions. Atmospheric tides constitute a significant perturbation source to the ionospheric electron density, up to 15% near 200 km.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2021)
Article
Astronomy & Astrophysics
J. Rodriguez-Zuluaga, C. Stolle, Y. Yamazaki, C. Xiong, S. L. England
Summary: Both ground- and satellite-based airglow imaging have been used to study the low-latitude ionosphere, focusing on the equatorial ionization anomaly (EIA) morphology and dynamics. The NASA GOLD mission provides far-ultraviolet airglow images from a geostationary orbit, capturing a wavelike structure in the nighttime EIA. Initial analyses show a symmetric synoptic-scale structure with poleward displacements and the presence of equatorial plasma depletions (EPDs).
EARTH AND SPACE SCIENCE
(2021)
Article
Meteorology & Atmospheric Sciences
D. Alexandre, B. Thurairajah, S. L. England, C. Y. Cullens
Summary: Oblique propagation of gravity waves refers to the latitudinal or vertical propagation from low-latitude troposphere to polar mesosphere. This propagation, not included in current parameterization schemes, may be an important component of global dynamical structure. Studies show a high correlation between GW pseudomomentum flux from monsoon convection and Polar Mesospheric Clouds in the northern hemisphere, indicating the influence of Interhemispheric Coupling mechanism.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Astronomy & Astrophysics
Brian J. Harding, Jorge L. Chau, Maosheng He, Christoph R. Englert, John M. Harlander, Kenneth D. Marr, Jonathan J. Makela, Matthias Clahsen, Guozhu Li, M. Venkat Ratnam, S. Vijaya Bhaskar Rao, Yen-Jung J. Wu, Scott L. England, Thomas J. Immel
Summary: The study compared thermospheric neutral wind observations from MIGHTI on the ICON spacecraft with four ground-based SMRs, showing strong correlation with a small mean difference. However, a significant portion of the disagreement variance remains unexplained, potentially attributed to unknown errors and temporal variability of the wind. Further research is needed to address discrepancies in wind observations between different platforms.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2021)
Editorial Material
Astronomy & Astrophysics
Robert DeMajistre
Proceedings Paper
Engineering, Aerospace
Md Nurul Huda, Scott L. England, Gustavo Gargioni
2020 IEEE AEROSPACE CONFERENCE (AEROCONF 2020)
(2020)
Article
Astronomy & Astrophysics
D. J. McComas, M. Bzowski, M. A. Dayeh, R. DeMajistre, H. O. Funsten, P. H. Janzen, I Kowalska-Leszczynska, M. A. Kubiak, N. A. Schwadron, J. M. Sokol, J. R. Szalay, M. Tokumaru, E. J. Zirnstein
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2020)