1 / 16

Gang Lu High Altitude Observatory, NCAR Joe Huba Plasma Physics Division, NRL

Modeling Ionospheric Super-Fountain Effect Based on the Coupled TIMEGCM-SAMI3: Initial Results. Gang Lu High Altitude Observatory, NCAR Joe Huba Plasma Physics Division, NRL. Acknowledgments: Cesar Valladares, Mike Nicolls, Art Richmond.

erasto
Download Presentation

Gang Lu High Altitude Observatory, NCAR Joe Huba Plasma Physics Division, NRL

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. Modeling Ionospheric Super-Fountain Effect Based on the Coupled TIMEGCM-SAMI3: Initial Results Gang Lu High Altitude Observatory, NCAR Joe Huba Plasma Physics Division, NRL Acknowledgments: Cesar Valladares, Mike Nicolls, Art Richmond SA31C, Fall AGU, San Francisco, December 3-7, 2012

  2. Distributions of IEF, PCP, and Vertical Ion Drift IEF = VBz 19:30UT

  3. Two Major Limitations of the TIMEGCM Fixed Upper Boundary at ~680 km Prescribed O+ Flux at the Upper Boundary neutrals: H, O, O2, N, NO, N2 neutral wind and TN (electric fields) TIMEGCM SAMI3

  4. Ne Variations during the course of PPEF

  5. Comparison of TIMEGCM and SAMI Ne TIMEGCM Coupled TIMEGCM-SAMI3

  6. Comparison of Observed and Modeled Ne Jicamarca radar TIMEGCM 19:30 UT SAMI

  7. TEC Maps at Selected UT During PPEF

  8. Comparison of Observed and Modeled TEC at 75°W Boston College South American GPS Chain TIMEGCM- SAMI3

  9. TIMEGCM O+ Flux at 680 km cm-2 s-1

  10. SAMI O+ Flux at 680 km

  11. Evolution of HmF2 During PPEF

  12. Evolution of HmF2 During PPEF

  13. Summary • The coupled model eliminates the upper boundary limitations of the TIMEGCM, showing a much improved agreement with observations; • During PPEF, the super-fountain effect can lift the F-layer above 800 km; • The O+ fluxes exhibits complex latitudinal and longitudinal variations during PPEF, with strong upward and downward flows in localized regions. • Future improvements are needed: - realistic magnetic fields (i.e., IGRF) - two-way coupling

  14. TIMEGCM TEC (below ~680km)

  15. Ratio of TEC (below 680km)/TEC % %

  16. TEC (below 680km) Maps at Selected UT

More Related