1 / 3

Plumes in the Inner Magnetosphere

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

constance-chavez
Télécharger la présentation

Plumes in the Inner Magnetosphere

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Plumes in the Inner Magnetosphere • 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. 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.

  2. 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]

  3. Plume Fine Scale Structure • How Much Structure Gets Propagated to the Magnetopause? • How Does That Affect Reconnection?

More Related