Mars fun

Mars today

• A cold baren desert…

• … with some leftover water?

converted PNM file

Image courtesy: NASA.

Early Mars

• Water!

Wet Mars - Kevin Gill

Image courtesy: Kevin Gill.

• The difference: the atmosphere!

MarsAtmosphere EarthAtmosphere

Mars’s atmosphere today. Image courtesy: NASA.

Earth’s atmosphere today. Image courtesy: http://thebarometer.podbean.com/.

Attention: The images are not to scale!

Magnetic considerations

• A complex magnetic topology

Whether we look at the radial component of the magnetic field or at the number of magnetic field lines, we conclude that Mars has a complex magnetic topology!

MarsMagneticMap

Radial magnetic field (Br) computed at 200 km altitude in color, overlain on gray-shaded topographic gradient map of Mars (MOLA data). The dark grey bands show regions of inadequate data coverage (Purucker et al., 2000, Plate 1).

FieldMapsH

The percent occurrence of open magnetic field lines (i.e., connecting the IMF to the Martian atmosphere) at ∼400 km altitude on the nightside and dayside (Brain et al., 2007).



• A simple approach

To understand what happened to Mars atmosphere, one approach is to focus on the electromagnetic dynamics of the atmosphere and decompose the complex magnetic field into chewable bites (Riousset et al. 2014).

MGS_zoom Mars100nT

Image courtesy: NASA/JPL.

100 nT~surface levels of Mars’ crustal fields using (Purucker et al., 2000) magnetic field model (Brecht et al.2010).

This is what we did for a magnetic cusp using a dipole…

Results for a magnetic cusp created by a single dipole with moment μ=1016 A⋅m2 placed 20 km below the Martian surface. Magnetic field lines (solid magenta lines), and magnitude (color map) and direction (solid black arrows) of the current density J in the planes y=0 km and z=112 km. The dynamo current is confined in the altitude range 110≲z≲150 km.

… and for magnetic arcades using series of the same dipole.

Results for “magnetic arcades” created by nine dipoles with the same magnetic magnitudes as above. The dipoles are placed in three rows with alternating up/down directions. The six upward directed dipoles are placed at the coordinates (in kilometers) (−100; −250; −20), (0; −250; −20), (+100; −250; −20), and (−100; +250; −20), (0; +250; −20), (+100; +250; −20); the three downward directed dipoles are inserted in-between at (−100; 0; −20), (0; 0; −20), and (+100; 0; −20). Magnetic field lines (solid magenta lines), and magnitude (color map) and direction (solid black arrows) of the current density J in the planes y=0 km and z=112 km. Again, the dynamo current is confined in the altitude range 110≲z≲150 km.

Aurorae

• On Earth

EarthAurora

• On Earth and Mars

MarsGlobeAurora EarthGlobeAurora

Mars’ aurora? Image courtesy: ESA/Mats Holmström. The expected difference with Earth’s aurora is due to the intricate configuration of the Martian magnetic field.

Aurora Australis as captured by NASAs IMAGE satellite, overlaid onto NASAs satellite-based Blue Marble image. Image courtesy:NASA.

• Let the journey continue!

MarsExploration

Magnetohydrodynamics


Last updated: Friday, August 4, 2017

Conferences

Conferences & invited presentations

  1. Engle, J. A. & J. A. Riousset (2017), Numerical and analytical studies of critical radius in new geometries for corona discharge in air and CO2-rich environments, 2017 CEDAR Workshop, Workshop on Thunderstorm Coupling and Effects, Keystone Resort, Colorado, June 22. (CEDAR 2017 presentation)
  2. Engle, J. A. & J. A. Riousset (2017), Numerical and analytical studies of corona discharge initiation in air & CO2-rich environment, 2017 CEDAR Workshop, Poster Session Booklet #2, p. 7, Abstract SPRT-01, Keystone Resort, Colorado, June 29. (CEDAR 2017 poster)
  3. Riousset, J. A. (2017), Plasma Modeling in Space, Planetary & Atmospheric Sciences, PSS Colloquium, Florida Institute of Technology, Melbourne, Florida, February 16. (FIT 2017 presentation, FIT 2017 annotations)
  4. Riousset, J. A. & J. A. Engle (2016), Scaling of Dielectric Breakdown Thresholds in Earth’s and CO2-rich atmospheres: Impact for Predictions of Extraterrestrial Transient Luminous Events and Lightning Discharges, Eos Trans. AGU, Fall Meet. Suppl., Abstract AE21A-08. (AGU 2016 presentation)
  5. Engle, J. A. & J. A. Riousset (2016), Numerical and analytical studies of critical radius in Cartesian and spherical geometries for corona discharge in air and CO2-rich environments, Eos Trans. AGU, Fall Meet. Suppl., Abstract AE13A-0413. (AGU 2016 poster)
  6. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, P. G. Withers, and J. P. M. Hale (2016), Electrodynamics of the Martian dynamo region near magnetic cusps and loops, 2016 CEDAR Workshop, Poster Session Booklet #1, p. 6, Abstract PLAN-05, Santa Fe, New Mexico, June 21. (CEDAR 2016 poster)
  7. Engle, J. A. & J. A. Riousset (2016), Numerical and analytical studies of critical radius in spherical and cylindrical geometries for corona discharge, 2016 CEDAR Workshop, Poster Session Booklet #2, p. 5, Abstract SPRT-01, Santa Fe, New Mexico, June 22. (CEDAR 2016 poster)
  8. Riousset, J. A., U. Motschmann, A. Reiners, and C. Marvin (2015), Theoretical modeling of planet-induced stellar activity using A.I.K.E.F. simulations, Eos Trans. AGU, Fall Meet. Suppl., Abstract SM31B-2494. (AGU 2015 poster)
  9. Riousset, J. A. (2015), Plasma Modeling in Space, Planetary & Atmospheric Sciences, Physical Sciences Colloquium Series, Embry-Riddle Aeronautical University, Daytona Beach, Florida, May 12. (ERAU 2015 presentation)
  10. Riousset, J. A., U. Motschmann, A. Reiners, and C. Marvin (2015), Towards theoretical modeling of planet-induced stellar activity using A.I.K.E.F. simulations, Geophys. Res. Abs., Vol. 17, EGU2015-14287, EGU General Assembly, Vienna, Austria, April 12. (EGU 2015 abstract, EGU 2015 poster)
  11. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, P. G. Withers, and J. P. M. Hale (2014), Electrodynamics of the Martian dynamo region near magnetic cusps and loops, MUAN Workshop, Cologne, Germany, March 31. (MUAN 2014 presentation, MUAN 2014 annotations)
  12. Paty, C. S., J. A. Riousset, A. Rajendar, M. O. Fillingim, R. J. Lillis, S. L. England, P. G. Withers, H. T. Smith, and C. Jackman (2014), From ionospheric electrodyamics at Mars to mass and momentum loading at Saturn: Quantifying the impact of neutral-plasma interactions using plasma dynamic simulations, 2014 Chapman Conference on Magnetosphere-Ionosphere Coupling in the Solar System, Yosemite National Park, California, February 9–14. (CHAPMAN 2014 presentation)
  13. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, P. G. Withers, and J. P. M. Hale (2013), Electrodynamics of the Martian dynamo region near magnetic cusps and loops using the Martian Multifluid Magnetohydrodynamic Model (M4), Eos Trans. AGU, Fall Meet. Suppl., Abstract P12A-02. (AGU 2013 presentation, AGU 2013 annotations)
  14. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, P. G. Withers, and J. P. M. Hale (2013), Novel modeling of Mars’ ionospheric electrodynamics, Society of Physics Students (ΣΠΣ) Induction Talk, Florida Institute of Technology, Melbourne, Forida, April 19. (FIT 2013 presentation, FIT 2013 annotations)
  15. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, P. G. Withers, and J. P. M. Hale (2013), Physical Sciences 2012-2013 Colloquium Series, Embry-Riddle Aeronautical University, Daytona Beach, Florida, April 18. (ERAU 2013 presentation, ERAU 2013 annotations)
  16. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, P. G. Withers, and J. P. M. Hale (2012), Modeling of Mars’ ionospheric electrodynamics under various local magnetic field topologies, Eos Trans. AGU, Fall Meet. Suppl., Abstract P23A-1909. (AGU 2012 poster, AGU 2012 videos)
  17. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, P. G. Withers, and J. P. M. Hale (2012), Novel Modeling of Mars’ Ionospheric Electrodynamics: On the Formation of the Dynamo Currents, ISSI Workshop, Bern, Switzerland, November 12. (ISSI 2012 presentation, ISSI 2012 annotations)
  18. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, P. G. Withers, and J. P. M. Hale (2012), Novel modeling of Mars’ ionospheric electrodynamics, Department of Physics and Astronomy Seminar, Georgia State, Atlanta, Georgia, October 2. (GSU 2012 presentation)
  19. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, and P. Withers (2011), Novel modeling of Mars’ ionospheric electrodynamics, Eos Trans. AGU, Fall Meet. Suppl., Abstract SA11A-03. (AGU 2011 presentation)
  20. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, and P. Withers (2011), Novel modeling of Mars’ ionospheric electrodynamics, 2011 CEDAR Workshop, Poster Session Booklet #2, p. 6, Abstract PLNT-02, Santa Fe, New Mexico, June 29. (CEDAR 2011 poster)
  21. Riousset, J. A., V. P Pasko, and Anne Bourdon (2011), Air Heating associated with transient luminous events, 2011 CEDAR Workshop, Workshop on Lightning Effects on the Upper Atmosphere, Santa Fe, New Mexico, June 28. (CEDAR 2011 presentation)
  22. Riousset, J. A., (2010), Numerical modeling of lightning, blue jets, and gigantic jets, EAS 4801/8801: Planetary Science Seminar, Georgia Tech, Atlanta, Georgia, Sept. 8. (GT PSS 2010 presentation)
  23. Riousset, J. A., V. P Pasko, and Anne Bourdon (2009), Air heating associated with transient luminous events, Eos Trans. AGU, 90 (48), Fall Meet. Suppl., Abstract AE33A-0293. (AGU 2009 poster p. 1, AGU 2009 poster p. 2, and AGU 2009 video)
  24. Riousset, J. A., V. P. Pasko, P. R. Krehbiel, W. Rison, and M. A. Stanley (2009), Modeling of thundercloud screening layers: Implications for blue and gigantic jets, IAGA  11th  Scientific Assembly, Div. II01. Electrodynamical coupling from the troposphere to the magnetosphere related to thunderstorm electrical activity, 201-MON-O1700-0244, Sopron, Hungary, Aug 24–29. (IAGA 2009 presentation)
  25. Riousset, J. A., V. P. Pasko, A. Bourdon (2009), Air heating associated with transient luminous events, 2009 CEDAR Workshop, Monday CEDAR Poster Session Booklet, p. 3, Abstract SPR-05, Santa Fe, New Mexico, June 19, 2009. (CEDAR 2009 poster, CEDAR 2009 table, and CEDAR 2009 references)
  26. Bourdon, A., J. A. Riousset, and V. P. Pasko (2009), Air heating associated with ground pressure discharges and transient luminous events, 2009 Chapman Conference on the Effects of Thunderstorms and Lightning in the Upper Atmosphere, Observation of Transient Luminous Event – Poster Session, p. 44, University Park, Pennsylvania, May 10–14. (CHAPMAN 2009 poster)
  27. Riousset, J. A., V. P. Pasko, P. R. Krehbiel, W. Rison, and M. A. Stanley (2009), Modeling of thundercloud screening layers: Implications for blue and gigantic jets, 2009 Chapman Conference on the Effects of Thunderstorms and Lightning in the Upper Atmosphere, Theory of Transient Luminous Events III, p. 24, University Park, Pennsylvania, May 10–14. (CHAPMAN 2009 presentation)
  28. Riousset, J. A., V. P. Pasko, P. R. Krehbiel, R. J. Thomas, W. Rison, and M. A. Stanley (2009), Numerical modeling of the formation of the screening charge near the thundercloud boundaries and its impact on the initiation and early stages of development of blue jets, 2009 URSI NRSM, Commission GH–Plenary Session, Abstract GH3a-7, p. 33, Boulder, Colorado, January 5–8. (URSI 2009 presentation)
  29. Riousset, J. A., V. P. Pasko, P. R. Krehbiel, R. J. Thomas, W. Rison, and M. A. Stanley (2008), Numerical modeling of the formation of the screening charge near the thundercloud boundaries and its impact on the initiation and early stages of development of blue and gigantic jets, Eos Trans. AGU, 89 (53), Fall Meet. Suppl., Abstract AE22A-04. (AGU 2008 presentation)
  30. Riousset, J. A., V. P. Pasko, P. R. Krehbiel, R. J. Thomas, and W. Rison (2008), Modeling studies of atmospheric conductivity and thundercloud charge imbalance effects on development of blue jet and gigantic jet discharges, 2008 CEDAR Workshop, Workshop on Lightning Effect on the Upper Atmosphere, Midway, Utah, June 17, 2008. (CEDAR 2008 presentation and CEDAR 2008 references)
  31. Riousset, J. A., V. P. Pasko, P. R. Krehbiel, R. J. Thomas, and W. Rison (2008), Modeling studies of atmospheric conductivity and thundercloud charge imbalance effects on development of blue jet and gigantic jet discharges, 2008 CEDAR Workshop, Poster Session Booklet #1, p. 2, Abstract SPR-04, Midway, Utah, June 17, 2008. (CEDAR 2008 poster and CEDAR 2008 references)
  32. Riousset, J. A., V. P. Pasko, P. R. Krehbiel, R. J. Thomas, W. Rison. M. A. Stanley, and H. E. Edens (2008), Three-dimensional fractal modeling of lightning and jet discharges and comparison with lightning mapping observations, XXIX URSI General Assembly, General Poster Session II Commission E, Abstract EP2.11, p. 324, Chicago, Illinois, August 14. (URSI 2008 poster, URSI 2008 references)
  33. Krehbiel, P. R., J. A. Riousset, V. P. Pasko, R. J. Thomas, W. Rison, and M. A. Stanley (2007), Upward electrical discharges from thunderstorms, 2007 Leiden Workshop, Poster Session, Leiden, Netherlands, Oct. 8. (LEIDEN 2007 presentation)
  34. Krehbiel, P. R., J. A. Riousset, V. P. Pasko, R. J. Thomas, W. Rison, and M. A. Stanley (2007), Upward electrical discharges from thunderstorms, 2007 Leiden Workshop, Presentation, Leiden, Netherlands, Oct. 11. (LEIDEN 2007 poster)
  35. Krehbiel, P. R., J. A. Riousset, V. P. Pasko, R. J. Thomas, W. Rison, M. A. Stanley, and H. E. Edens (2007), Upward electrical discharges from thunderstorms, Eos Trans. AGU, 88 (52), Fall Meet. Suppl., Abstract AE23A-0891. (AGU 2007 poster p. 1, AGU 2007 poster p. 2)
  36. Riousset, J. A., V. P. Pasko, P. R. Krehbiel, R. J. Thomas, and W. Rison (2007), Physical Mechanisms of blue jets and gigantic jets, 2007 CEDAR-DASI Workshop, Poster Session Booklet #2, p. 17, Abstract SPR-01, Santa Fe, New Mexico, June 26. (CEDAR 2007 poster)
  37. Riousset, J. A., V. P. Pasko, P. R. Krehbiel, R. J. Thomas, and W. Rison (2006), Three-dimensional fractal modeling of intracloud lighting discharge in a New Mexico thunderstorm and comparison with lightning mapping observations, Eos Trans. AGU, 87 (52), Fall Meet. Suppl., Abstract AE21A-0996. (AGU 2006 poster p. 1, AGU 2006 poster p. 2)
  38. Riousset, J. A., V. P. Pasko, P. R. Krehbiel, R. J. Thomas, and W. Rison (2006), Electrical structure of thunderclouds leading to formation of blue jets and gigantic jets, 2006 CEDAR Workshop, Poster Session Booklet #2, p. 6, Abstract COUP-05, Santa Fe, New Mexico, June 22. (CEDAR 2006 poster, CEDAR 2006 references)

Seminars

  1. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, P. G. Withers, and J. P. M. Hale (2014), Electrodynamics of the Martian Dynamo Region–The M4 Approach, Numerische Plasmasimulationen Gruppe, Plasma Institute für theoretische Physik, Technische Universität Braunschweig, Braunschweig, Germany, January 21. (TU-BS 2014 presentation, TU-BS 2014 annotations)
  2. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, P. G. Withers, and J. P. M. Hale (2013), Planetary Magnetospheres–The Curious Case of Mars, EAS 4801/8801: Planetary Science Seminar, Georgia Tech, Atlanta, Georgia, September 24. (GT PSS 2013 presentation, GT PSS 2013 annotations)
  3. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, P. G. Withers, and J. P. M. Hale (2013), Planetary Magnetospheres–The Curious Case of Mars, EAS Geophysics Seminar, Georgia Tech, Atlanta, Georgia, September 6. (GT EAS 2013 presentation, GT EAS 2013 annotations)
  4. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, P. G. Withers, and J. P. M. Hale (2012), Novel modeling of Mars’ ionospheric electrodynamics, EAS 4801/8801: Planetary Science Seminar, Georgia Tech, Atlanta, Georgia, September 24. (GT PSS 2012 presentation, GT PSS 2012 annotations)
  5. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, P. G. Withers, and J. P. M. Hale (2012), Novel modeling of Mars’ ionospheric electrodynamics, EAS Geophysics Seminar, Georgia Tech, Atlanta, Georgia, September 21. (GT EAS 2012 presentation, GT EAS 2012 annotations)
  6. Riousset, J. A., C. S. Paty, R. J. Lillis, M. O. Fillingim, S. L. England, P. G. Withers, and J. P. M. Hale (2012), Novel modeling of Mars’ ionospheric electrodynamics, EAS 4801/8801: Planetary Science Seminar, Georgia Tech, Atlanta, Georgia, February 17. (GT PSS 2012 presentation)
  7. Riousset, J. A., V. P. Pasko, P. R. Krehbiel, R. J. Thomas, W. Rison, M. A. Stanley, and H. H. Edens (2011), Thundercloud, lightning & jets: Recent models and results, EAS 4801/8801: Planetary Science Seminar, Georgia Tech, Atlanta, Georgia, March 7. (GT PSS 2011 presentation)
  8. Riousset, J. A. (2010), Numerical modeling of lightning, blue jets, and gigantic jets, Ph.D. Defense, The Pennsylvania State University, University Park, Pennsylvania. (PhD defense presentation)
  9. Gibson, A. S., J. A. Riousset, and V. P. Pasko (2009), Minimum breakdown voltages for corona discharge in cylindrical and spherical geometries, NSF EEREU Penn State Annual Research Symposium, Penn State, University Park, Pennsylvania, July 29. (REU 2009 presentation)
  10. Poulos, S., J. A. Riousset, and V. P. Pasko (2008), Modeling of realistic thundercloud charge structure and application to simulation of lightning discharges, NSF EEREU Penn State Annual Research Symposium, Penn State, University Park, Pennsylvania, July 24. (REU 2008 presentation)
  11. Krehbiel, P. R., J. A. Riousset, V. P. Pasko, R. J. Thomas, W. Rison, M. A. Stanley, and H. E. Edens (2008), Upward electrical discharges from thunderstorms new observations and unifying theory, EMRS3 Seminar, Penn State, University Park, Pennsylvania, March 18. (EMRS3 2008 presentation, EMRS3 2008 references)
  12. Riousset, J. A. and V. P. Pasko (2006), Three-Dimensional fractal modeling of lightning discharge in a New Mexico thunderstorm and comparison with lightning mapping observations, EMRS3 Seminar, Penn State, University Park, Pennsylvania, December 5. (EMRS3 2006 presentation)
  13. Tidwell, W., J. A. Riousset, and V. P. Pasko (2006), Fractal modeling of cloud-to-ground lightning, NSF EEREU Penn State Annual Research Symposium, Penn State, University Park, Pennsylvania, July 27. (REU 2006 presentation)
  14. Riousset, J. A. and V. P. Pasko (2006), Fractal Modeling of Lightning Discharges, EMRS3 Seminar, Penn State, University Park, Pennsylvania, April 25. (EMRS3 2006 presentation)
  15. Riousset, J. A. (2006), Fractal modeling of lightning discharges, Master’s thesis, The Pennsylvania State University, University Park, PA. (MS defense presentation)

Blue indicates invited presentations.


Last updated: Wednesday, July 5, 2017