Improved simulations of the inner magnetosphere during high geomagnetic activity with the RAM-SCB model

Engel, Miles A.; Morley, Steven Karl; Henderson, Michael Gerard; Jordanova, Vania Koleva; Woodroffe, Jesse Richard; Mahfuz, Rehana

doi:10.1029/2018JA026260

Title: Improved simulations of the inner magnetosphere during high geomagnetic activity with the RAM-SCB model

Journal Article · 21 May 2019 · Journal of Geophysical Research. Space Physics

DOI: https://doi.org/10.1029/2018JA026260 · OSTI ID:1544685

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

We report that simulating times of high geomagnetic activity are an important part of the continuing efforts to understand space weather and its impacts on humanity. Recent improvements to the Ring-current Atmosphere interactions Model with Self-Consistent magnetic field (RAM-SCB) have been undertaken, with the purpose of expanding the accuracy and robustness of the model during these highly active times. The improvements include a number of changes to the functionality of both the RAM model and the self-consistent magnetic field calculation. In addition, the models have been modernized and rewritten in an effort to make them more user friendly and understandable. The effect of these changes is shown by simulating the day of 17 March 2013, which saw Sym-H drop below -100 nT and included a magnetosphere push-in within geosynchronous orbit. The comparison between the previous model configuration and this new configuration is investigated by calculating a series of metrics for the relation between the observed and modeled Sym-H, as well as the >10-keV electron flux measured by the HOPE and MAGEIS instruments aboard RBSP-B and the simulated electron flux. Lastly, these metrics show that the improvements to the model have increased the accuracy of the model for the given simulation.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE; Laboratory Directed Research and Development (LDRD)

Grant/Contract Number:: 89233218CNA000001; AC52-06NA25396

OSTI ID:: 1544685

Alternate ID(s):: OSTI ID: 1582468

Report Number(s):: LA-UR--18-30591

Journal Information:: Journal of Geophysical Research. Space Physics, Journal Name: Journal of Geophysical Research. Space Physics Journal Issue: 6 Vol. 124; ISSN 2169-9380

Publisher:: American Geophysical UnionCopyright Statement

Country of Publication:: United States

Language:: English

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