Improving solar wind forecasting using Data AssimilationData Assimilation (DA) has enabled huge improvements in the skill of terrestrial operational weather forecasting. In this study, we use a variational DA scheme with a computationally efficient solar…Matthew Lang, Jake Witherington, Harriet Turner et al.·Dec 11, 2020SaveLearn
Propagating Conditions and the Time of ICMEs Arrival: A Comparison of the Effective Acceleration Model with ENLIL and DBEM ModelsThe Effective Acceleration Model (EAM) predicts the Time-of-Arrival (ToA) of the Coronal Mass Ejection (CME) driven shock and the average speed within the sheath at 1 AU. The model is based on the…Evangelos Paouris, Jasa Calogovic, Mateja Dumbovic et al.·Dec 10, 2020SaveLearn
Estimation of turbulent heating of solar wind protons at 1AUThe paper presents a new method for deriving turbulent heating of the solar wind using plasma moments and magnetic field data. We develop the method and then apply it to compute the turbulent heating…George Livadiotis, Maher A. Dayeh, Gary P. Zank·Dec 9, 2020SaveLearn
Low-energy electromagnetic processes affecting free-falling test-mass charging for LISA and future space interferometersGalactic cosmic rays and solar energetic particles charge gold-platinum, free-falling test masses (TMs) on board interferometers for the detection of gravitational waves in space. The charging…Catia Grimani, Andrea Cesarini, Michele Fabi et al.·Dec 4, 2020SaveLearn
Radiation Belt Response to Fast Reverse Shock at Geosynchronous OrbitFast reverse shocks (FRSs) cause the magnetosphere to expand, by contrast to the well-known compressions caused by the impact of fast forward shocks (FFS). Usually, FFSs are more geoeffective than…Ankush Bhaskar, David Sibeck, Shrikanth G. Kanekal et al.·Dec 2, 2020SaveLearn
Reply to comment by Yermolaev and Lodkina on "Solar Wind and Heavy Ion Properties of Interplanetary Coronal Mass Ejections" by Owens (2018) in arXiv:2008.05160Here I reply to the comment by Yermolaev and Lodkina [arXiv:2008.05160] on "Solar Wind and Heavy Ion Properties of Interplanetary Coronal Mass Ejections" by Owens (2018).Mathew Owens·Dec 1, 2020SaveLearn
Determining Ionizing Doses in Medium Earth Orbits Using Long-Term GPS Particle MeasurementsWe use long-term electron and proton in-situ measurements made by the CXD particle instruments, developed by Los Alamos National Laboratory and carried on board GPS satellites, to determine total…Yue Chen, Matthew R. Carver, Steven K. Morley et al.·Nov 30, 2020SaveLearn
Whistler Waves in the foot of Quasi-Perpendicular Super-Critical ShocksWhistler waves are thought to play an essential role in the dynamics of collisionless shocks. We use the magnetospheric multiscale (MMS) spacecraft to study whistler waves around the lower hybrid…Ahmad Lalti, Yuri Khotyaintsev, Daniel B. Graham et al.·Nov 20, 2020SaveLearn
Isotropic Scaling Features Measured Locally in the Solar Wind Turbulence with Stationary Background FieldThe scaling anisotropy is crucial to interpret the nonlinear interactions in solar wind turbulence. Previous observations provide diverse results and the structure function analyses are also reported…Honghong Wu, Chuanyi Tu, Xin Wang et al.·Nov 20, 2020SaveLearn
Energy Supply for Heating the Slow Solar Wind Observed by Parker Solar Probe between 0.17 and 0.7 auEnergy supply sources for the heating process in the slow solar wind remain unknown. The Parker Solar Probe (PSP) mission provides a good opportunity to study this issue. Recently, PSP observations…Honghong Wu, Chuanyi Tu, Xin Wang et al.·Nov 20, 2020SaveLearn
First observation of magnetic flux rope inside electron diffusion regionMagnrtic flux ropes (MFRs) play a crucial role during magnetic reconnection. They are believed to be primarily generated by tearing mode instabilities in the electron diffusion region (EDR). However,…Z. Z. Chen, H. S. Fu, Z. Wang et al.·Nov 20, 2020SaveLearn
Toward a Next Generation Particle Precipitation Model: Mesoscale Prediction Through Machine Learning (a Case Study and Framework for Progress)We advance the modeling capability of electron particle precipitation from the magnetosphere to the ionosphere through a new database and use of machine learning (ML) tools to gain utility from those…Ryan M. McGranaghan, Jack Ziegler, Téo Bloch et al.·Nov 19, 2020SaveLearn
Patch Size Evolution During Pulsating AuroraWe report both decreasing and increasing trends in the patch sizes during pulsating aurora events. About 150 pulsating auroral events over the Fennoscandian Lapland have been successfully analyzed…N. Partamies, K. Bolmgren, E. Heino et al.·Nov 18, 2020SaveLearn
Nonlinear Landau resonant interaction between kinetic Alfv\'en waves and thermal electrons: Excitation of time domain structuresPhase space holes, double layers and other solitary electric field structures, referred to as time domain structures (TDSs), often occur around dipolarization fronts in the Earth's inner…Xin An, Jacob Bortnik, Xiaojia Zhang·Nov 18, 2020SaveLearn
Properties of the Sheath Regions of Coronal Mass Ejections with or without Shocks from STEREO in situ Observations near 1 AUWe examine 188 coronal mass ejections (CMEs) measured by the twin STEREO spacecraft during 2007-2016 to investigate the generic features of the CME sheath and the magnetic ejecta (ME) and…T. M. Salman, N. Lugaz, C. J. Farrugia et al.·Nov 12, 2020SaveLearn
Random Walk and Trapping of Interplanetary Magnetic Field Lines: Global Simulation, Magnetic Connectivity, and Implications for Solar Energetic ParticlesThe random walk of magnetic field lines is an important ingredient in understanding how the connectivity of the magnetic field affects the spatial transport and diffusion of charged particles. As…Rohit Chhiber, David Ruffolo, William H. Matthaeus et al.·Nov 12, 2020SaveLearn
Magnetic Effects of Plasma Pressure Gradients in the Upper F RegionThe Swarm satellites fly at altitudes that at polar latitudes are generally assumed to onlycontain currents that are aligned with the local magnetic field. Therefore, disturbances along the main…K. M. Laundal, S. M. Hatch, T. Moretto·Nov 12, 2020SaveLearn
On the Conditions of Aliasing Effects in Constellations with More than Four SpacecraftThe k-filtering/wave telescope method has been successfully applied to the four-spacecraft measurements from Cluster II and MMS, revealing the four-dimensional power spectral density…L. Zhang, J. S. He, Y. Narita et al.·Nov 11, 2020SaveLearn
Time-scale dependence of solar wind-based regression models of ionospheric electrodynamicsThe solar wind influence on geospace can be described as the sum of a directly driven component, or dayside reconnection, and an unloading component, associated with the release of magnetic energy…K. M. Laundal, J. P. Reistad, S. M. Hatch et al.·Nov 2, 2020SaveLearn
Long-term dynamics driven by resonant wave-particle interactions: from Hamiltonian resonance theory to phase space mappingIn this study we consider the Hamiltonian approach for the construction of a map for a system with nonlinear resonant interaction, including phase trapping and phase bunching effects. We derive basic…Anton V. Artemyev, Anatoly I. Neishtadt, Alexei. A. Vasiliev et al.·Oct 31, 2020SaveLearn
Ionization effect in the Earth's atmosphere during the sequence of October-November 2003 Halloween GLE eventsThe effect of precipitating high-energy particles on atmospheric physics and chemistry is extensively studied over the last decade. In majority of the existing models, the precipitating particles…A. Mishev, P. I. Y. Velinov·Oct 30, 2020SaveLearn
Wave-particle energy transfer directly observed in an ion cyclotron waveContext. The first studies with Parker Solar Probe (PSP) data have made significant progress toward the understanding of the fundamental properties of ion cyclotron waves in the inner heliosphere.…Daniel Vech, Mihailo M. Martinovic, Kristopher G. Klein et al.·Oct 28, 2020SaveLearn
A Study of Automatically Detected Flow Channels in the Polar Cap IonosphereThis paper presents a new algorithm for detecting high-speed flow channels in the polar cap. The algorithm was applied to Super Dual Auroral Radar Network data, specifically to data from the new…K. Herlingshaw, L. J. Baddeley, K. Oksavik et al.·Oct 28, 2020SaveLearn
Characteristics of Magnetic Holes in the Solar Wind Revealed by Parker Solar ProbeWe present a statistical analysis for the characteristics and radial evolution of linear magnetic holes (LMHs) in the solar wind from 0.166 to 0.82 AU using Parker Solar Probe observations of the…L. Yu, S. Y. Huang, Z. G. Yuan et al.·Oct 27, 2020SaveLearn
Possible coexistence of kinetic Alfv\'en and ion Bernstein modes in sub-ion scale compressive turbulence in the solar windWe investigate compressive turbulence at sub-ion scales with measurements from the Magnetospheric MultiScale Mission. The tetrahedral configuration and high time resolution density data obtained by…Owen Wyn Roberts, Daniel Verscharen, Yasuhito Narita et al.·Oct 23, 2020SaveLearn