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SwRI Sept 2014 Plasmaspheric Plumes at the Magnetopause Plumes in the Inner Magnetosphere Goldstein, J., S. De Pascuale, C. Kletzing, W. Kurth, K. J. Genestreti, R. M. Skoug, B. A. Larsen, L. M. Kistler, C. Mouikis, H. Spence (2014c), Simulation of Van Allen Probes plasmapause encounters, J. Geophys. Res., doi:10.1002/2014JA020252, in press, JGR Special Issue. INNER MAGNETOSPHERE • Even very simple models do a pretty good job of predicting plumes in the inner magnetosphere. • The trick is to extend those predictions to the magnetopause. • Example of a Very Simple Model: Plasmapause Test Particle (PTP) Code “Computational Rendering of an Asymmetric Plasmasphere” • 52 plasmapause encounters (2 S/C) 15-20 Jan 2013 • Compared to EMFISIS in situ density. • Mean model-data difference is 0.4±0.05 R E • Fine Scale Structure : Both Van Allen Probes spacecraft crossed features consistent with long-lived “residual plume” predicted by the model. Caption: Comparison of simulation (green region) with in situ measurements (vertical axis). Electron density derived from plasma waves plotted along orbit of Van Allen Probe B. Observations agree with both model’s plasmapause and its predicted 32-h old residual plume.

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Plumes in the Inner Magnetosphere. INNER MAGNETOSPHERE Even very simple m odels do a pretty good job of predicting plumes in the inner magnetosphere. The trick is to extend those predictions to the magnetopause. Example of a Very Simple Model: Plasmapause Test Particle (PTP) Code - PowerPoint PPT Presentation

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Page 1: Plumes in the Inner Magnetosphere

SwRI Sept 2014Plasmaspheric Plumes at the Magnetopause

Plumes in the Inner Magnetosphere

Goldstein, J., S. De Pascuale, C. Kletzing, W. Kurth, K. J. Genestreti, R. M. Skoug, B. A. Larsen, L. M. Kistler, C. Mouikis, H. Spence (2014c), Simulation of Van Allen Probes plasmapause encounters, J. Geophys. Res., doi:10.1002/2014JA020252, in press, JGR Special Issue.

INNER MAGNETOSPHERE

• Even very simple models do a pretty good job of predicting plumes in the inner magnetosphere.

• The trick is to extend those predictions to the magnetopause.

• Example of a Very Simple Model:Plasmapause Test Particle (PTP) Code

“Computational Rendering of an Asymmetric Plasmasphere” • 52 plasmapause encounters (2 S/C) 15-20 Jan 2013 • Compared to EMFISIS in situ density.

• Mean model-data difference is 0.4±0.05 RE

• Fine Scale Structure: Both Van Allen Probes spacecraft crossed features consistent with long-lived “residual plume” predicted by the model.

Caption: Comparison of simulation (green region) with in situ measurements (vertical axis). Electron density derived from plasma waves plotted along orbit of Van Allen Probe B. Observations agree with both model’s plasmapause and its predicted 32-h old residual plume.

Page 2: Plumes in the Inner Magnetosphere

SwRI Sept 2014Plasmaspheric Plumes at the Magnetopause

What Effect Do Plumes Have at the Magnetopause?

BEYOND THE INNER MAGNETOSPHERE

Imaging would be great.

Statistical Analysis: • Dense plasma does reach the

magnetopause [Chen and Moore, 2006].

• Cold plume plasma probably affects solar wind-magnetosphere coupling [Borovsky and Denton, 2006]

Page 3: Plumes in the Inner Magnetosphere

SwRI Sept 2014Plasmaspheric Plumes at the Magnetopause

Plume Fine Scale Structure

How Much Structure Gets Propagated to the Magnetopause?

How Does That Affect Reconnection?


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