Results 81 to 90 of about 408,077 (211)

Convective Amplification of Ionospheric Feedback by a Finite‐Duration Inertial Alfvén‐Wave Source

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract We investigate the ionospheric feedback instability (IFI) driven by a finite‐duration localized source of inertial Alfvén waves. Wave‐excited conductance perturbations undergo Pedersen mobility drift in the convection and wave electric fields and are amplified.
R. Rankin, W. Wang, Q.‐G. Zong
wiley   +1 more source

The Canadian Enhanced Polar Outflow Probe (e-POP) Mission: Current Status and Planned Observations and Data Distribution

Data Science Journal, 2009
The CASSIOPE Enhanced Polar Outflow Probe (e-POP) is a Canadian small-satellite mission dedicated to the study of polar ion outflows and related magnetosphere-ionosphere coupling processes in the topside ionosphere.
A W Yau, H G James, P A Bernhardt, L L Cogger, G A Enno, H Hayakaw, A Howarth, E P King, D J Knudsen, R B Langley, R Rankin, R H Hum, D D Wallis, A White   +13 more
doaj   +1 more source

Seasonal and Diurnal Variability of Thermospheric Metastable Helium Observed by Multi‐Platform Observations and Numerical Modeling

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Metastable helium (He∗ ${\text{He}}^{\ast }$) in the thermosphere emits at 1,083 nm and provides a powerful diagnostic of thermospheric composition, solar radiation, and transport. Its detection remains challenging because of its extremely low density and high‐altitude.
Zhenwei Liu, Chuan Huang, Jinru Cheng, Tangsheng Cheng, Hang Zhou, Chaomei Wu, Chen Liang, Tingdi Chen, Weilong Luo, Chong Wang, Zhaofeng Wang, Ruocan Zhao, Xianghui Xue   +12 more
wiley   +1 more source

Midsummer decrease in vertical geomagnetic field at the magnetic pole under strong solar radiation into the polar ionosphere [PDF]

, 1999
P(論文)The vertical component of the geomagnetic field Z on the ground shows a noticeable decrease in midsummer, amounting to several tens of nT, in the polar region at and around the geomagnetic pole.
Fukushima, Naoshi
core   +1 more source

The polar cliff in the morning sector of the ionosphere [PDF]

Annales Geophysicae, 2013
Abstract. By "polar cliff" we mean the steep increase in the ionization density observed in the morning sector of the polar ionosphere. Here the properties of this remarkable feature are investigated. The data set consists of electron density and temperature measurements obtained by the Dynamics Explorer 2 satellite.
openaire   +3 more sources

A Radio Science Experiment for Dragonfly to Investigate Titan's Rotation and Interior Structure

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract NASA's mission Dragonfly to Titan is scheduled for launch in 2028 with arrival in 2034 to study Titan's prebiotic chemistry and habitability. We propose a radio science experiment for Dragonfly, in which radiometric tracking of the rotorcraft from the Deep Space Network, already baselined for communications and navigation, is used as a ...
Flavio Petricca, Dustin Buccino
wiley   +1 more source

Quasi‐Homologous Solar Flares and Impacts on Thermospheric Density and Satellite Orbital Drag

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Quasi‐Homologous Flaring (QHF) activity from active regions on the Sun releases intense electromagnetic radiation in recurrent bursts over extended periods. In this letter, we present the effects of recurrent impulsive extreme ultraviolet (EUV) heating on thermospheric neutral density and the resulting atmospheric drag on satellites based on ...
S. Tulasi Ram, Princy K. Dubey, S. Mondal, Denny M. Oliveira, Jayashree Bulusu, Chinmaya Nayak, D. Rout, Anil Raghav, A. P. Dimri   +8 more
wiley   +1 more source

Solar wind-magnetosphere-ionosphere interactions in the earth's plasma environment [PDF]

, 2003
The properties of the Earth’s coupled magnetosphere-ionosphere system are dominated by its interaction with the solar wind plasma, mediated by magnetic reconnection processes at the magnetopause interface.
McWilliams, K. A., Davies, J. A., Sandholt, P. E., Cowley, S. W. H., Milan, S. E., Provan, G., Lester, M., Wild, J. A., Khan, H., Yeoman, T. K., Grocott, A.   +10 more
core   +3 more sources

First Observation of Four‐Band Ion Cyclotron Whistlers

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Ion cyclotron whistlers are frequently observed in low Earth orbit, typically formed when right‐hand polarized lightning whistlers undergo polarization reversal at crossover frequencies. In this study, we for the first time report a four‐band ion cyclotron whistler event detected by Van Allen Probe A.
Huicong Chen, Hui Zhu, Tao Xian, Gaopeng Lu, Yingying Zhao, Zhijie Qin, Zhenghao She   +6 more
wiley   +1 more source

Tidal Variability in the Lower Thermosphere: Relative Importance of ENSO, QBO, PJO, MJO, and Lyα

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 20, 28 October 2026.
Abstract Atmospheric tides in the lower thermosphere play an important role in regulating upper‐atmospheric conditions relevant to space weather. However, their spatial and temporal variability remains poorly understood, apart from seasonal variations. Previous studies have shown that tides can be influenced by meteorological and solar conditions. This
Yosuke Yamazaki, Huixin Liu, Kaoru Sato, Dai Koshin, Claudia Stolle   +4 more
wiley   +1 more source