Space Weather Impact on High Latitude Ionospheric TEC During the End of Solar Cycle 23rd at Maitri, Antarctica

2012 ◽  
Vol 18 (1) ◽  
pp. 241-246
Author(s):  
Prakash Khatarkar ◽  
Purushottam Bhawre ◽  
Pravaiz A. Khan ◽  
Azad A. Mansoori ◽  
Shweta Mukherjee ◽  
...  
Keyword(s):  
Solar Cycle ◽  
Space Weather ◽  
High Latitude ◽  
Weather Impact

scholarly journals Ionospheric response to solar and interplanetary disturbances: a Swarm perspective

2019 ◽  
Vol 377 (2148) ◽  
pp. 20180098 ◽  
Author(s):  
G. Balasis ◽  
C. Papadimitriou ◽  
A. Z. Boutsi
Keyword(s):  
Solar Cycle ◽  
Electric Fields ◽  
Space Weather ◽  
Low Earth Orbit ◽  
Topside Ionosphere ◽  
Plasma Instabilities ◽  
Radio Communications ◽  
Weather Impact ◽  
Ionospheric Response ◽  
Solar Eruptions

The ionospheric response to solar and interplanetary disturbances has been the subject of intense study for several decades. For 5 years now, the European Space Agency's Swarm fleet of satellites surveys the Earth's topside ionosphere, measuring magnetic and electric fields at low-Earth orbit with unprecedented detail. Herein, we study in situ the ionospheric response in terms of the occurrence of plasma instabilities based on 2 years of Swarm observations. Plasma instabilities are an important element of space weather because they include irregularities like the equatorial spread F events, which are responsible for the disruption of radio communications. Moreover, we focus on three out of the four most intense geospace magnetic storms of solar cycle 24 that occurred in 2015, including the St Patrick's Day event, which is the strongest magnetic storm of the present solar cycle. We examine the associated ionospheric response at Swarm altitudes through the estimation of a Swarm Dst-like index. The newly proposed Swarm derived Dst index may be suitable for space weather applications. This article is part of the theme issue ‘Solar eruptions and their space weather impact’.

scholarly journals Forecasting the space weather impact: The COMESEP project

2012 ◽  
Author(s):  
N. B. Crosby ◽  
A. Veronig ◽  
E. Robbrecht ◽  
B. Vrsnak ◽  
S. Vennerstrom ◽  
...  
Keyword(s):  
Space Weather ◽  
Weather Impact

Explicit IMF By-dependence in geomagnetic activity

2021 ◽  
Author(s):  
Lauri Holappa ◽  
Timo Asikainen ◽  
Kalevi Mursula
Keyword(s):  
Solar Wind ◽  
Geomagnetic Activity ◽  
Space Weather ◽  
High Latitude ◽  
Coupling Function ◽  
Future Space ◽  
Weather Modeling ◽  
Southern High Latitude ◽  
Imf Clock Angle ◽  
The Imf

<p>The interaction of the solar wind with the Earth’s magnetic field produces geomagnetic activity, which is critically dependent on the orientation of the interplanetary magnetic field (IMF). Most solar wind coupling functions quantify this dependence on the IMF orientation with the so-called IMF clock angle in a way, which is symmetric with respect to the sign of the B<sub>y</sub> component. However, recent studies have shown that IMF B<sub>y</sub> is an additional, independent driver of high-latitude geomagnetic activity, leading to higher (weaker) geomagnetic activity in Northern Hemisphere (NH) winter for B<sub>y</sub> > 0 (B<sub>y</sub> < 0). For NH summer the dependence on the B<sub>y</sub> sign is reversed. We quantify the size of this explicit B<sub>y</sub>-effect with respect to the solar wind coupling function, both for northern and southern high-latitude geomagnetic activity. We show that for a given value of solar wind coupling function, geomagnetic activity is about 40% stronger for B<sub>y</sub> > 0 than for B<sub>y</sub> < 0 in NH winter. We also discuss recent advances in the physical understanding of the B<sub>y</sub>-effect. Our results highlight the importance of the IMF B<sub>y</sub>-component for space weather and must be taken into account in future space weather modeling.</p>

scholarly journals Space Weather Modeling Capabilities Assessment: Auroral Precipitation and High‐Latitude Ionospheric Electrodynamics

Space Weather ◽  
2019 ◽  
Vol 17 (2) ◽  
pp. 212-215 ◽  
Author(s):  
Robert Robinson ◽  
Yongliang Zhang ◽  
Katherine Garcia‐Sage ◽  
Xiaohua Fang ◽  
Olga P. Verkhoglyadova ◽  
...  
Keyword(s):  
Space Weather ◽  
High Latitude ◽  
Ionospheric Electrodynamics ◽  
Weather Modeling

scholarly journals Proxy Index Derived From All Sky Imagers for Space Weather Impact on GPS

Space Weather ◽  
2018 ◽  
Vol 16 (7) ◽  
pp. 838-848
Author(s):  
Sajan C. Mushini ◽  
Susan Skone ◽  
Emma Spanswick ◽  
Eric Donovan ◽  
Maryam Najmafshar
Keyword(s):  
Space Weather ◽  
Weather Impact

scholarly journals Significant Space Weather Impact on the Escape of Hydrogen From Mars

2018 ◽  
Vol 45 (17) ◽  
pp. 8844-8852 ◽  
Author(s):  
Majd Mayyasi ◽  
Dolon Bhattacharyya ◽  
John Clarke ◽  
Amy Catalano ◽  
Mehdi Benna ◽  
...  
Keyword(s):  
Space Weather ◽  
Weather Impact

scholarly journals Predicting the geoeffective properties of coronal mass ejections: current status, open issues and path forward

2019 ◽  
Vol 377 (2148) ◽  
pp. 20180096 ◽  
Author(s):  
A. Vourlidas ◽  
S. Patsourakos ◽  
N. P. Savani
Keyword(s):  
Space Weather ◽  
Coronal Mass Ejections ◽  
Technology Development ◽  
Action Plan ◽  
Current Status ◽  
Weather Impact ◽  
Solar Eruptions ◽  
Holding Back ◽  
Open Issues ◽  
Made In

Much progress has been made in the study of coronal mass ejections (CMEs), the main drivers of terrestrial space weather thanks to the deployment of several missions in the last decade. The flow of energy required to power solar eruptions is beginning to be understood. The initiation of CMEs is routinely observed with cadences of tens of seconds with arc-second resolution. Their inner heliospheric evolution can now be imaged and followed routinely. Yet relatively little progress has been made in predicting the geoeffectiveness of a particular CME. Why is that? What are the issues holding back progress in medium-term forecasting of space weather? To answer these questions, we review, here, the measurements, status and open issues on the main CME geoeffective parameters; namely, their entrained magnetic field strength and configuration, their Earth arrival time and speed, and their mass (momentum). We offer strategies for improving the accuracy of the measurements and their forecasting in the near and mid-term future. To spark further discussion, we incorporate our suggestions into a top-level draft action plan that includes suggestions for sensor deployment, technology development and modelling/theory improvements. This article is part of the theme issue ‘Solar eruptions and their space weather impact’.

scholarly journals Quantifying the Solar Cycle Modulation of Extreme Space Weather

2020 ◽  
Vol 47 (11) ◽  
Author(s):  
S. C. Chapman ◽  
S. W. McIntosh ◽  
R. J. Leamon ◽  
N. W. Watkins
Keyword(s):  
Solar Cycle ◽  
Space Weather
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