Filters








323 Hits in 10.6 sec

Causality and Information Transfer Between the Solar Wind and the Magnetosphere–Ionosphere System

Pouya Manshour, Georgios Balasis, Giuseppe Consolini, Constantinos Papadimitriou, Milan Paluš
2021 Entropy  
An information-theoretic approach for detecting causality and information transfer is used to identify interactions of solar activity and interplanetary medium conditions with the Earth's magnetosphereionosphere  ...  A causal information transfer from the solar wind parameters to geomagnetic indices is detected.  ...  In fact, due to the continuous transfer of energy from solar wind as an external driver into the magnetosphere-ionosphere system along with different internal processes operating in various spatial and  ... 
doi:10.3390/e23040390 pmid:33806048 fatcat:ltlnydzei5drvjpbbmoplop6hu

Measuring Information Coupling between the Solar Wind and the Magnetosphere–Ionosphere System

Mirko Stumpo, Giuseppe Consolini, Tommaso Alberti, Virgilio Quattrociocchi
2020 Entropy  
The interaction between the solar wind and the Earth's magnetosphereionosphere system is very complex, being essentially the result of the interplay between an external driver, the solar wind, and internal  ...  In this work, we discuss how to deal with the problem of measuring causal information in the solar windmagnetosphereionosphere system.  ...  T.A. acknowledges the Institute for Space Astrophysics and Planetology (IAPS) for its support within the framework "Bando Nuove Idee IAPS 2019".  ... 
doi:10.3390/e22030276 pmid:33286053 pmcid:PMC7516727 fatcat:h2ocdciawbhkzhcrcktxbp6uay

On the role of neutral flow in field-aligned currents

Anthony J. Mannucci, Olga P. Verkhoglyadova, Xing Meng, Ryan McGranaghan
2018 Annales Geophysicae  
Neutral momentum that appears in the ion rest frame is likely the result of momentum imparted to ionospheric ions by solar wind flow and the resultant magnetospheric dynamics.  ...  </strong> In this brief note we explore the role of the neutral atmosphere in magnetosphereionosphere coupling.  ...  This research was carried out at the Jet Propulsion Laboratory, California Institute of Technology under contract with NASA. The sponsorship of NASA Heliophysics is acknowledged.  ... 
doi:10.5194/angeo-36-53-2018 fatcat:wrnfwxr3rjfq3lum44tv55hdg4

Quantifying Contributions of External Drivers to the Global Ionospheric State

Xing Meng, Olga P Verkhoglyadova
2021 Space Weather: The international journal of research and applications  
Space weather, originated from the solar activity, drives the ionosphere mainly via the solar extreme ultraviolet (EUV) and X-ray irradiance, as well as the solar wind arriving at the Earth that causes  ...  from the solar activity and lower atmosphere perturbations are less.  ...  The authors gratefully acknowledge NASA/GSFC's Space Physics Data Facility and Dr. Natalia Papitashvili for providing the  ... 
doi:10.1029/2021sw002752 fatcat:hqkdrreeyrdcpkmpcmmheid7py

Information Theory and Plasma Turbulence

R. O. Dendy, Bengt Eliasson, Padma K. Shukla
2009 AIP Conference Proceedings  
We here review some pioneering studies of mutual information in solar wind and magnetospheric plasmas, using techniques tested on standard complex systems.  ...  Information theory, applied directly to measured signals, yields new perspectives on, and quantitative knowledge of, the physics of strongly nonlinear and turbulent phenomena in plasmas.  ...  This work was supported in part by Euratom (but the views and opinions expressed herein do not necessarily reflect those of the European Commission) and by the United Kingdom Engineering and Physical Sciences  ... 
doi:10.1063/1.3266803 fatcat:v3m6j6bk2re7jgh6v7orbne5w4

Common solar wind drivers behind magnetic storm–magnetospheric substorm dependency

Jakob Runge, Georgios Balasis, Ioannis A. Daglis, Constantinos Papadimitriou, Reik V. Donner
2018 Scientific Reports  
The dynamical relationship between magnetic storms and magnetospheric substorms is one of the most controversial issues of contemporary space research.  ...  Here, we address this issue through a causal inference approach to two corresponding indices in conjunction with several relevant solar wind variables.  ...  (BMBF) and the Land Brandenburg for supporting this project by providing resources on the high performance computer system at the Potsdam Institute for Climate Impact Research.  ... 
doi:10.1038/s41598-018-35250-5 fatcat:r2clhywbpfggtipn7vgwsvsbai

Dynamical information flow within the magnetosphere-ionosphere system during magnetic storms [article]

Mirko Stumpo, Simone Benella, Giuseppe Consolini, Tommaso Alberti
2022 arXiv   pre-print
Our idea is to characterize the dynamics of the information flow within the magnetosphere-ionosphere system using a database of geomagnetic storms instead of considering a long time series of geomagnetic  ...  Whereas in the recent past it has been observed the absence of a net information flow between magnetic storms and substorms, previous in-situ satellite observations have evidenced that ionospheric-origin  ...  M.S. acknowledges the PhD course in Astronomy, Astrophysics and Space Science of the University of Rome "Sapienza", University of Rome "Tor Vergata" and Italian National Institute for Astrophysics (INAF  ... 
arXiv:2206.13992v1 fatcat:7fypnazhjjdodirxnw5w7tknq4

Transfer entropy and cumulant-based cost as measures of nonlinear causal relationships in space plasmas: applications to Dst

Jay R. Johnson, Simon Wing, Enrico Camporeale
2018 Annales Geophysicae  
</strong> It is well known that the magnetospheric response to the solar wind is nonlinear.  ...  In contrast, transfer entropy shows that there is no or little transfer of information from <i>D</i><sub>st</sub> to <i>V</i><sub>sw</sub>, as expected because it is the solar wind that drives the magnetosphere  ...  The raw solar wind data from ACE, Wind, ISEE1, and ISEE3 were obtained from NASA CDAW and NSSDC. The topical editor, Georgios Balasis, thanks one anonymous referee for help in evaluating this paper.  ... 
doi:10.5194/angeo-36-945-2018 fatcat:vplpn7wrqrff3eph2iy4jqlune

The Need for a System Science Approach to Global Magnetospheric Models

Gian Luca Delzanno, Joseph E. Borovsky
2022 Frontiers in Astronomy and Space Sciences  
support to the system analysis performed on the magnetospheric system.  ...  This perspective advocates for the need of a combined system science approach to global magnetospheric models and to spacecraft magnetospheric data to answer the question "Do simulations behave in the  ...  ACKNOWLEDGMENTS The authors wish to thank Humberto Godinez, Oleksandr Koshkarov, Slava Merkin, Yuri Omelchenko, Minna Palmroth, Vadim Roytershteyn, Kareem Sorathia and Simon Wing for useful conversations  ... 
doi:10.3389/fspas.2022.808629 fatcat:xqyvvlnsibgnrmb6slna3whrsi

The GUMICS-4 global MHD magnetosphere–ionosphere coupling simulation

P. Janhunen, M. Palmroth, T. Laitinen, I. Honkonen, L. Juusola, G. Facskó, T.I. Pulkkinen
2012 Journal of Atmospheric and Solar-Terrestrial Physics  
solar wind forcing.  ...  Based on the comparisons we can conclude that to a useful extent and with certain limitations, GUMICS-4 can reveal the detailed spatiotemporal behaviour of the magnetosphere-ionosphere system under given  ...  We acknowledge useful information exchange with Tamas Gombosi at the time when GUMICS and SWMF were both developed.  ... 
doi:10.1016/j.jastp.2012.03.006 fatcat:bq3fshujurbv7lg76wdopmhjoi

Solar-Terrestrial Data Science: Prior Experience and Future Prospects

Daniel N. Baker
2020 Frontiers in Astronomy and Space Sciences  
Applying neural network methods and linear prediction filtering approaches provided tremendous insights into how solar wind-magnetosphere-ionosphere coupling worked under various forcing conditions.  ...  Early methods of time series analysis with such datasets revealed key causal physical relationships and led to successful forecast models of magnetospheric substorms and geomagnetic storms.  ...  As shown here in Figure 6 , the transfer (or filter) function g(t) can be viewed as a general linear relationship between the solar wind driver and the magnetospheric response (Bargatze et al., 1985)  ... 
doi:10.3389/fspas.2020.540133 fatcat:fb4f4cajd5hxzftcgpl4nb4nu4

Common solar wind drivers behind magnetic storm-magnetospheric substorm dependency [article]

Jakob Runge, Georgios Balasis, Ioannis A. Daglis, Constantinos Papadimitriou, Reik V. Donner
2018 arXiv   pre-print
The dynamical relationship between magnetic storms and magnetospheric substorms presents one of the most controversial problems of contemporary geospace research.  ...  Here, we tackle this issue by applying a causal inference approach to two corresponding indices in conjunction with several relevant solar wind variables.  ...  (BMBF) and the Land Brandenburg for supporting this project by providing resources on the high performance computer system at the Potsdam Institute for Climate Impact Research.  ... 
arXiv:1802.02477v1 fatcat:i2xow6qwljgtnoxgyfepsl2nbi

Space weather explorer – The KuaFu mission

C.-Y. Tu, R. Schwenn, E. Donovan, E. Marsch, J.-S. Wang, L.-D. Xia, Y.-W. Zhang
2008 Advances in Space Research  
system.  ...  questions including solar CME initiation, Earth magnetic storm and substorm mechanisms, and advance our understanding of multi-scale interactions in and system-level behavior of our Sun-Earth space plasma  ...  Acknowledgements Tu, Wang, Xia, and Zhang are supported by the National Natural Science Foundation of China (NNSFC) under contract 40436015.  ... 
doi:10.1016/j.asr.2007.04.049 fatcat:tclhodrhgvba5fh3myzak3qac4

Magnetospheric Plasma Systems Science and Solar Wind Plasma Systems Science: The Plasma-Wave Interactions of Multiple Particle Populations

Joseph E. Borovsky
2021 Frontiers in Astronomy and Space Sciences  
The two cases discussed are 1) the Earth's magnetosphere with ion and electron populations trapped in the closed flux tubes of the magnetic dipole and 2) the solar wind with ion and electron populations  ...  For the magnetosphere, internal convection drives particle populations into stronger magnetic fields, leading to particle anisotropies; for the solar wind the expansion of the plasma away from the Sun  ...  Information- transfer studies (Wing and Johnson, 2019) have further refined our knowledge about solar-wind driving and in future can be used to examine the causality pathways through the multiple ion  ... 
doi:10.3389/fspas.2021.780321 doaj:00e85a4143cf4a93972159f0d6580f86 fatcat:uf4sifuclzb47pkjygifupq7xq

Space Weather: Terrestrial Perspective

Tuija Pulkkinen
2007 Living Reviews in Solar Physics  
While some effects are influenced neither by the properties of nor the processes within the Earth's magnetosphere, others are critically dependent on the interaction of the impinging solar wind with the  ...  As the utilization of space has become part of our everyday lives, and as our lives have become increasingly dependent on technological systems vulnerable to space weather influences, understanding and  ...  However, global MHD simulations can be used to trace the energy transfer through the simulation magnetopause and through the magnetosphere-ionosphere system.  ... 
doi:10.12942/lrsp-2007-1 fatcat:7h7cbmwrtrht3ltgboccc6qegm
« Previous Showing results 1 — 15 out of 323 results