Solar Magnetic Eruption Disturbances
Entry ID: ucar.scd.vets.vg.sme

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Summary
Abstract: Solar Magnetic Eruptions (SME), such as Coronal Mass Ejections and Solar
Flares, and their impact on Earth's space environment are the target of this
Space Weather research.Solar Magnetic Eruptions (SME) may cause the ejection of
magnetized gas into interplanetary space. These eruptions, known as Coronal
Mass Ejections (CMEs), may generate interplanetary transient disturbances
involving shocks and magnetic clouds. If these disturbances encounter the
Earth's magnetic field they can cause geomagnetic storms (observed as polar
auroras). In severe cases these storms can damage technological systems like
satellites, communications and navigation systems, power lines, as well as pose
danger to astronauts.

Although CMEs are quite frequent (one or two a day during periods of solar
maximum activity), only fraction of them hit the Earth's magnetosphere and
cause geomagnetic storms. Severe storms occur with a frequency of about 100
times over the 11-year cycle of solar activity. Extremely severe storms occur
about 4 times during this period. As humans depend more and more on advanced
technological systems, and as they expand into the space environment, the
knowledge of "space weather" becomes more important. Numerical modeling
represents an important tool for understanding and eventually forecasting space
weather.

The results of this study were obtained from a numerical simulation using a 3D
magneto hydrodynamic (MHD) heliospheric model that describes the solar wind
density, temperature, magnetic field components and velocity components. The
MHD model is driven by a solar eruption simulated using a coronal model
developed by the Science Application International Company (SAIC). The
heliospheric computations are carried out on a spherical grid, with the Sun
located at the center, ranging from 20 to 270 solar radii.

Related URL
Link: GET DATA


Data Set Citation
Dataset Originator/Creator: Dusan Odstrcil (scientist), Jon Linker (scientist), Zoran Mikic (scientist), Roberto Lionello (scientist), John Clyne (animator)
Online Resource: http://cdp.ucar.edu/browse/browse.htm?uri=http%3a%2f%2fdataportal.u...


Data Resolution
Temporal Resolution: 5 Days


Science Keywords
SUN-EARTH INTERACTIONS >SOLAR ACTIVITY >CORONA    [Definition]
SOLID EARTH >GEOMAGNETISM    [Definition]
SUN-EARTH INTERACTIONS >SOLAR ACTIVITY >CORONAL MASS EJECTIONS    [Definition]
SUN-EARTH INTERACTIONS >IONOSPHERE/MAGNETOSPHERE DYNAMICS >MAGNETIC FIELDS/MAGNETIC CURRENTS    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION


Project
ESIP >Earth Science Information Partners Program    [Information]


Use Constraints
Copyright 2002, University Corporation for Atmospheric Research (UCAR)


Keywords
Visualizations
Space


Originating Center
NCAR/SCD/VETS


Data Center
Community Data Portal, Visualization and Enabling Technologies Section, Computational and Information Systems Laboratory, National Center for Atmospheric Research, University Corporation for Atmospheric Research    [Information]
Data Center URL: http://cdp.ucar.edu/

Data Center Personnel
Name: NCAR CDP SUPPORT
Email: cdp at ucar.edu
Contact Address:
National Center for Atmospheric Research
P.O. Box 3000
City: Boulder
Province or State: CO
Postal Code: 80307-3000
Country: USA



Creation and Review Dates
Last DIF Revision Date: 2012-07-10

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