Ring current pressure estimation with RAM-SCB using data assimilation and Van Allen Probe flux data

Godinez, Humberto C.; Yu, Yiqun; Lawrence, E.; Henderson, Michael Gerard; Larsen, Brian Arthur; Jordanova, Vania Koleva

doi:10.1002/2016GL071646

Title: Ring current pressure estimation with RAM-SCB using data assimilation and Van Allen Probe flux data

Journal Article · Mon Nov 21 00:00:00 EST 2016 · Geophysical Research Letters

DOI:https://doi.org/10.1002/2016GL071646· OSTI ID:1484629

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Beihang Univ., Beijing (China)

Abstract Capturing and subsequently modeling the influence of tail plasma injections on the inner magnetosphere is important for understanding the formation and evolution of the ring current. In this study, the ring current distribution is estimated with the Ring Current‐Atmosphere Interactions Model with Self‐Consistent Magnetic field (RAM‐SCB) using, for the first time, data assimilation techniques and particle flux data from the Van Allen Probes. The state of the ring current within the RAM‐SCB model is corrected via an ensemble based data assimilation technique by using proton flux from one of the Van Allen Probes, to capture the enhancement of the ring current following an isolated substorm event on 18 July 2013. The results show significant improvement in the estimation of the ring current particle distributions in the RAM‐SCB model, leading to better agreement with observations. This newly implemented data assimilation technique in the global modeling of the ring current thus provides a promising tool to improve the characterization of particle distribution in the near‐Earth regions.

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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) Program

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1484629

Alternate ID(s):: OSTI ID: 1402339

Report Number(s):: LA-UR-15-26661

Journal Information:: Geophysical Research Letters, Vol. 43, Issue 23; ISSN 0094-8276

Publisher:: American Geophysical UnionCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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Reanalysis of Ring Current Electron Phase Space Densities Using Van Allen Probe Observations, Convection Model, and Log‐Normal Kalman Filter Aseev, N. A.; Shprits, Y. Y. Space Weather, Vol. 17, Issue 4 https://doi.org/10.1029/2018sw002110	journal	April 2019
Recent Advancements and Remaining Challenges Associated With Inner Magnetosphere Cross‐Energy/Population Interactions (IMCEPI) Yu, Yiqun; Liemohn, Mike W.; Jordanova, Vania K. Journal of Geophysical Research: Space Physics, Vol. 124, Issue 2 https://doi.org/10.1029/2018ja026282	journal	February 2019
The Effects of Localized Thermal Pressure on Equilibrium Magnetic Fields and Particle Drifts in The Inner Magnetosphere Xia, Zhiyang; Chen, Lunjin; Artemyev, Anton Journal of Geophysical Research: Space Physics, Vol. 124, Issue 7 https://doi.org/10.1029/2018ja026043	journal	July 2019

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