Results 21 to 30 of about 249 (89)

Characterization of Mercury's Atomic and Molecular Hydrogen Exosphere and the First Detection of H2 Ions

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract From 1974 to 1975, the Mariner 10 spacecraft studied Mercury's environment during three flybys and detected hydrogen, helium, and possibly atomic oxygen in the exosphere using its ultraviolet spectrometer, but no molecular hydrogen. Based on the sensitivity of the occultation instrument, an upper limit for the H2 ${\mathrm{H}}_{2}$ surface ...
F. Weichbold, D. Schmid, H. Lammer, M. Volwerk, M. Scherf, N. V. Erkaev, A. Varsani, C. Simon Wedlund, C. Mazelle   +8 more
wiley   +1 more source

Influence of Mars Topography on Neutral Surface Radiation: Modeling and MSL/RAD Observations

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract Since landing in 2012, the Radiation Assessment Detector (RAD) onboard the Mars science laboratory (MSL) Curiosity rover has encountered different local landscapes, which have induced variations in the local surface environment. The aim of this study is to include realistic and site‐specific local topography for any position in a radiation ...
Gabin Charpentier, Bent Ehresmann, Jingnan Guo, Salman Khaksarighiri, Rémi Bénacquista, Jean Christophe Malapert, Robert Ecoffet, Julien Mekki, Alexis Paillet, Sven Löffler, Robert F. Wimmer‐Schweingruber, Donald M. Hassler, Cary Zeitlin, Philippe Valet, Yves Gourinat   +14 more
wiley   +1 more source

Calibrating Probabilistic Solar‐Wind Forecasts Driven by the Wang‐Sheeley‐Arge Model

Space Weather, Volume 24, Issue 3, March 2026.
Abstract By spatially perturbing coronal model output within a coupled coronal‐heliospheric model we can generate probabilistic predictions of solar‐wind speed. We apply these spatial perturbations to the Wang‐Sheeley‐Arge (WSA) model output to generate large sets of input conditions for the Heliospheric Upwind eXtrapolation with time dependence (HUXt)
N. O. Edward‐Inatimi, M. J. Owens, L. Barnard, H. Turner, M. Marsh, S. Gonzi, M. Lang   +6 more
wiley   +1 more source

Localized Threats: How Ground Conductivity Shapes the Geoelectric Response

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Geomagnetic storms can induce strong geoelectric fields in the ground. These fields drive geomagnetically induced currents in technological conductor systems, such as power grids. In this study, we analyze 4‐hr periods of two such major geomagnetic storms: the Halloween storm (29–31 October 2003) and the 7–8 September 2017 storm.
M. Kellinsalmi, E. Marshalko, L. Juusola, A. Viljanen   +3 more
wiley   +1 more source

Solar Activity Impacts on Ionospheric Scintillation and Precise Point Positioning Based on Multi‐Year GNSS and Scintillation Observations

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Solar activity induces ionospheric irregularities that degrade Global Navigation Satellite System (GNSS) performance through amplitude and phase scintillation. Although numerous studies have investigated event‐driven or regional responses, the nonlinear coupling between solar radiation, ionospheric scintillation, and precise point positioning (
Jincheng Li, Qi Liu, Xiaomin Luo, Manuel Hernández‐Pajares, Enric Monte‐Moreno, Guangxia Wang, Heng Yang, Chuanding Zhang, Li Yang, Yaoyao Liu   +9 more
wiley   +1 more source

Implementing 3D Geometry of a Coronal Mass Ejection in the Drag‐Based Model

Space Weather, Volume 24, Issue 3, March 2026.
Abstract The drag‐based model (DBM) is a simple and widely used analytical tool for predicting the arrival time and speed of interplanetary coronal mass ejections (ICMEs) throughout the heliosphere. The current DBM is two‐dimensional; we extend it to three dimensions by applying a non‐self‐similar cone geometry in both the equatorial and meridional ...
M. Dumbović, K. Martinić, A. K. Remeshan, G. Chikunova, M. Temmer, D. Sudar, B. Vršnak, J. Čalogović, S. Lulić   +8 more
wiley   +1 more source

Collection, Collation, and Comparison of Near‐Earth In Situ CME Boundaries

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Coronal mass ejections (CMEs) drive space weather throughout the heliosphere so knowledge of their internal properties is key to understanding and eventually forecasting their effects. Typically observations are limited to single‐spacecraft encounters sampling one path that may or may not be representative of the overall structure.
C. Kay, E. E. Davies, M. Dumbović, K. Martinić, E. Palmerio, H. T. Rüdisser, E. Weiler, C. Möstl   +7 more
wiley   +1 more source

Simulated Operational Testing of the Prototype Implementation of the SOFIE Model: The 2025 Space Weather Prediction Testbed Exercise

Space Weather, Volume 24, Issue 3, March 2026.
Abstract The CLEAR Space Weather Center of Excellence's solar energetic particle (SEP) model, SOlar wind with FIeld lines and Energetic particles (SOFIE), was run and evaluated on‐site during the Space Weather Prediction Testbed (SWPT) exercise at the National Oceanic and Atmospheric Administration's Space Weather Prediction Center (NOAA/SWPC) in May ...
Weihao Liu, Lulu Zhao, Igor V. Sokolov, Kathryn Whitman, Tamas I. Gombosi, Nishtha Sachdeva, Eric T. Adamson, Hazel M. Bain, Claudio Corti, M. Leila Mays, Michelangelo Romano, Carina R. Alden, Madeleine M. Anastopulos, Mary E. Aronne, Janet E. Barzilla, Wesley T. Cook, Shawn D. Dahl, Hannah Hermann, Anthony J. Iampietro, A. Steve Johnson, Elizabeth A. Juelfs, Melissa R. Kane, Jonathan D. Lash, Kimberly Moreland, Briana K. Muhlestein, Teresa Nieves‐Chinchilla, Edward Semones, James F. Spann, Earl M. Spencer, Luke A. Stegeman, Christopher J. Stubenrauch, Kenneth L. Tegnell   +31 more
wiley   +1 more source

Extended Lead‐Time Geomagnetic Storm Forecasting With Solar Wind Ensembles and Machine Learning

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Geomagnetic storms are large disruptions of the magnetosphere, which can impact satellites, communications systems, and power grids, causing significant technological and economic impacts. Current forecasting models utilize L1 satellite data, constraining lead time to a few hours, often insufficient for effective mitigation. We investigate how
M. Billcliff, A. W. Smith, M. Owens, W. L. Woo, L. Barnard, N. Edward‐Inatimi, I. J. Rae   +6 more
wiley   +1 more source

Simulating high-speed solar wind streams from coronal holes using an L5-L1 configuration of lagrangian points. [PDF]

Sci Rep
Podladchikova T, Veronig AM, Temmer M, Hofmeister SJ.   +3 more
europepmc   +1 more source