Importance of Ambipolar Electric Field in Driving Ion Loss From Mars: Results From a Multifluid MHD Model With the Electron Pressure Equation Included
Abstract
The multi-fluid (MF) magnetohydrodynamic model of Mars is improved by solving an additional electron pressure equation. Through the electron pressure equation, the electron temperature is calculated based on the effects from various electron-related heating and cooling processes (e.g., photo-electron heating, electron-neutral collision, and electron-ion collision), and thus, the improved model can calculate the electron temperature and the electron pressure force terms self-consistently. Model results of a typical case using the MF with electron pressure equation included model are compared in detail to identical cases using the MF and multi-species models to identify the effect of the improved physics. Here, we find that when the electron pressure equation is included, the general interaction patterns are similar to those with no electron pressure equation. However, the MF with electron pressure equation included model predicts that the electron temperature is much larger than the ion temperature in the ionosphere, consistent with both Viking and Mars Atmosphere and Volatile EvolutioN (MAVEN) observations. Using our numerical model, we also examined in detail the relative importance of different forces in the plasma interaction region. All three models are also applied to a MAVEN event study using identical input conditions; overall, the improved model matches best withmore »
- Authors:
-
- Univ. of California, Los Angeles, CA (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Princeton Univ., NJ (United States)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Univ. of Colorado, Boulder, CO (United States). Lab. for Atmospheric and Space Physics
- Univ. of Iowa, Iowa City, IA (United States)
- NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
- Univ. of California, Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE; National Aeronautics and Space Administration (NASA)
- OSTI Identifier:
- 1648060
- Grant/Contract Number:
- AC02-09CH11466; NNH10CC04C
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Journal of Geophysical Research. Space Physics
- Additional Journal Information:
- Journal Volume: 124; Journal Issue: 11; Journal ID: ISSN 2169-9380
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; Mars; multifluid MHD; ambipolar electric field; ion loss; electron energy equation
Citation Formats
Ma, Y. J., Dong, C. F., Toth, G., Holst, B., Nagy, A. F., Russell, C. T., Bougher, S., Fang, Xiaohua, Halekas, J. S., Espley, J. R., Mahaffy, P. R., Benna, M., McFadden, J., and Jakosky, B. M. Importance of Ambipolar Electric Field in Driving Ion Loss From Mars: Results From a Multifluid MHD Model With the Electron Pressure Equation Included. United States: N. p., 2019.
Web. doi:10.1029/2019ja027091.
Ma, Y. J., Dong, C. F., Toth, G., Holst, B., Nagy, A. F., Russell, C. T., Bougher, S., Fang, Xiaohua, Halekas, J. S., Espley, J. R., Mahaffy, P. R., Benna, M., McFadden, J., & Jakosky, B. M. Importance of Ambipolar Electric Field in Driving Ion Loss From Mars: Results From a Multifluid MHD Model With the Electron Pressure Equation Included. United States. https://doi.org/10.1029/2019ja027091
Ma, Y. J., Dong, C. F., Toth, G., Holst, B., Nagy, A. F., Russell, C. T., Bougher, S., Fang, Xiaohua, Halekas, J. S., Espley, J. R., Mahaffy, P. R., Benna, M., McFadden, J., and Jakosky, B. M. 2019.
"Importance of Ambipolar Electric Field in Driving Ion Loss From Mars: Results From a Multifluid MHD Model With the Electron Pressure Equation Included". United States. https://doi.org/10.1029/2019ja027091. https://www.osti.gov/servlets/purl/1648060.
@article{osti_1648060,
title = {Importance of Ambipolar Electric Field in Driving Ion Loss From Mars: Results From a Multifluid MHD Model With the Electron Pressure Equation Included},
author = {Ma, Y. J. and Dong, C. F. and Toth, G. and Holst, B. and Nagy, A. F. and Russell, C. T. and Bougher, S. and Fang, Xiaohua and Halekas, J. S. and Espley, J. R. and Mahaffy, P. R. and Benna, M. and McFadden, J. and Jakosky, B. M.},
abstractNote = {The multi-fluid (MF) magnetohydrodynamic model of Mars is improved by solving an additional electron pressure equation. Through the electron pressure equation, the electron temperature is calculated based on the effects from various electron-related heating and cooling processes (e.g., photo-electron heating, electron-neutral collision, and electron-ion collision), and thus, the improved model can calculate the electron temperature and the electron pressure force terms self-consistently. Model results of a typical case using the MF with electron pressure equation included model are compared in detail to identical cases using the MF and multi-species models to identify the effect of the improved physics. Here, we find that when the electron pressure equation is included, the general interaction patterns are similar to those with no electron pressure equation. However, the MF with electron pressure equation included model predicts that the electron temperature is much larger than the ion temperature in the ionosphere, consistent with both Viking and Mars Atmosphere and Volatile EvolutioN (MAVEN) observations. Using our numerical model, we also examined in detail the relative importance of different forces in the plasma interaction region. All three models are also applied to a MAVEN event study using identical input conditions; overall, the improved model matches best with MAVEN observations. All of the simulation cases are examined in terms of the total ion loss, and the results show that the inclusion of the electron pressure equation increases the escape rates by 50–110% in total mass, depending on solar condition and strong crustal field orientation, clearly demonstrating the importance of the ambipolar electric field in facilitating ion escape.},
doi = {10.1029/2019ja027091},
url = {https://www.osti.gov/biblio/1648060},
journal = {Journal of Geophysical Research. Space Physics},
issn = {2169-9380},
number = 11,
volume = 124,
place = {United States},
year = {Fri Oct 18 00:00:00 EDT 2019},
month = {Fri Oct 18 00:00:00 EDT 2019}
}
Web of Science
Figures / Tables:
Works referenced in this record:
Adaptive numerical algorithms in space weather modeling
journal, February 2012
- Tóth, Gábor; van der Holst, Bart; Sokolov, Igor V.
- Journal of Computational Physics, Vol. 231, Issue 3
Mars Global Surveyor Measurements of the Martian Solar Wind Interaction
journal, January 2007
- Brain, D. A.
- Space Science Reviews, Vol. 126, Issue 1-4
A comet-like escape of ionospheric plasma from Mars
journal, January 2008
- Lundin, R.; Barabash, S.; Holmström, M.
- Geophysical Research Letters, Vol. 35, Issue 18
The MAVEN Magnetic Field Investigation
journal, June 2015
- Connerney, J. E. P.; Espley, J.; Lawton, P.
- Space Science Reviews, Vol. 195, Issue 1-4
The structure and variability of Mars dayside thermosphere from MAVEN NGIMS and IUVS measurements: Seasonal and solar activity trends in scale heights and temperatures
journal, January 2017
- Bougher, Stephen W.; Roeten, Kali J.; Olsen, Kirk
- Journal of Geophysical Research: Space Physics, Vol. 122, Issue 1
Mars Global Surveyor Observations of Solar Wind Magnetic Field Draping Around Mars
journal, March 2004
- Crider, Dana H.; Brain, David A.; Acuña, Mario H.
- Space Science Reviews, Vol. 111, Issue 1/2
Phobos 2/ASPERA data revisited: Planetary ion escape rate from Mars near the 1989 solar maximum: PHOBOS 2 MARS ESCAPE RATE REVISITED
journal, February 2013
- Ramstad, Robin; Futaana, Yoshifumi; Barabash, Stas
- Geophysical Research Letters, Vol. 40, Issue 3
Probing Mars' crustal magnetic field and ionosphere with the MGS Electron Reflectometer
journal, October 2001
- Mitchell, D. L.; Lin, R. P.; Mazelle, C.
- Journal of Geophysical Research: Planets, Vol. 106, Issue E10
Aspera/Phobos measurements of the ion outflow from the MARTIAN ionosphere
journal, May 1990
- Lundin, R.; Zakharov, A.; Pellinen, R.
- Geophysical Research Letters, Vol. 17, Issue 6
Solar wind interaction with the Martian upper atmosphere: Crustal field orientation, solar cycle, and seasonal variations
journal, September 2015
- Dong, Chuanfei; Bougher, Stephen W.; Ma, Yingjuan
- Journal of Geophysical Research: Space Physics, Vol. 120, Issue 9
Three-dimensional, multifluid, high spatial resolution MHD model studies of the solar wind interaction with Mars: THREE-DIMENSIONAL, MULTIFLUID MHD MODEL MARS STUDIES
journal, May 2011
- Najib, Dalal; Nagy, Andrew F.; Tóth, Gábor
- Journal of Geophysical Research: Space Physics, Vol. 116, Issue A5
The loss of water from Mars: Numerical results and challenges
journal, March 2010
- Brecht, Stephen H.; Ledvina, Stephen A.
- Icarus, Vol. 206, Issue 1
A spherical harmonic model of the lithospheric magnetic field of Mars
journal, June 2014
- Morschhauser, A.; Lesur, V.; Grott, M.
- Journal of Geophysical Research: Planets, Vol. 119, Issue 6
Structure and Variability of the Martian Ion Composition Boundary Layer
journal, October 2018
- Halekas, J. S.; McFadden, J. P.; Brain, D. A.
- Journal of Geophysical Research: Space Physics, Vol. 123, Issue 10
MAVEN SupraThermal and Thermal Ion Compostion (STATIC) Instrument
journal, November 2015
- McFadden, J. P.; Kortmann, O.; Curtis, D.
- Space Science Reviews, Vol. 195, Issue 1-4
Inelastic collisions at low energies
journal, May 1969
- Dalgarno, A.
- Canadian Journal of Chemistry, Vol. 47, Issue 10
Global Distribution of Crustal Magnetization Discovered by the Mars Global Surveyor MAG/ER Experiment
journal, April 1999
- Acuña, M. H.
- Science, Vol. 284, Issue 5415
Flows, Fields, and Forces in the Mars-Solar Wind Interaction: Mars-Solar Wind Interaction
journal, November 2017
- Halekas, J. S.; Brain, D. A.; Luhmann, J. G.
- Journal of Geophysical Research: Space Physics, Vol. 122, Issue 11
Strong plume fluxes at Mars observed by MAVEN: An important planetary ion escape channel: STRONG PLUME FLUXES OBSERVED BY MAVEN
journal, November 2015
- Dong, Y.; Fang, X.; Brain, D. A.
- Geophysical Research Letters, Vol. 42, Issue 21
Ionospheric loss from Mars as predicted by hybrid particle simulations: IONOSPHERIC LOSS FROM MARS
journal, October 2016
- Brecht, Stephen H.; Ledvina, Stephen A.; Bougher, Stephen W.
- Journal of Geophysical Research: Space Physics, Vol. 121, Issue 10
Solar Wind Deflection by Mass Loading in the Martian Magnetosheath Based on MAVEN Observations: SOLAR WIND DEFLECTION AT MARS
journal, March 2018
- Dubinin, E.; Fraenz, M.; Pätzold, M.
- Geophysical Research Letters, Vol. 45, Issue 6
Enhanced O 2 + loss at Mars due to an ambipolar electric field from electron heating: Enhanced O 2 + loss at Mars
journal, May 2016
- Ergun, R. E.; Andersson, L. A.; Fowler, C. M.
- Journal of Geophysical Research: Space Physics, Vol. 121, Issue 5
Three-dimensional, multispecies, high spatial resolution MHD studies of the solar wind interaction with Mars
journal, January 2004
- Ma, Yingjuan
- Journal of Geophysical Research, Vol. 109, Issue A7
Mars-solar wind interaction: LatHyS, an improved parallel 3-D multispecies hybrid model: SIMULATED MARS-SOLAR WIND INTERACTION
journal, July 2016
- Modolo, Ronan; Hess, Sebastien; Mancini, Marco
- Journal of Geophysical Research: Space Physics, Vol. 121, Issue 7
The polar wind
journal, November 1968
- Banks, Peter M.; Holzer, Thomas E.
- Journal of Geophysical Research, Vol. 73, Issue 21
A comparison of global models for the solar wind interaction with Mars
journal, March 2010
- Brain, D.; Barabash, S.; Boesswetter, A.
- Icarus, Vol. 206, Issue 1
MAVEN Observations of the Effects of Crustal Magnetic Fields on Electron Density and Temperature in the Martian Dayside Ionosphere
journal, November 2017
- Flynn, Casey L.; Vogt, Marissa F.; Withers, Paul
- Geophysical Research Letters, Vol. 44, Issue 21
The polar wind: Recent observations
journal, November 2007
- Yau, Andrew W.; Abe, Takumi; Peterson, W. K.
- Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 69, Issue 16
Electric Mars: A large trans‐terminator electric potential drop on closed magnetic field lines above Utopia Planitia
journal, February 2017
- Collinson, Glyn; Mitchell, David; Xu, Shaosui
- Journal of Geophysical Research: Space Physics, Vol. 122, Issue 2
Electron energetics in the Martian dayside ionosphere: Model comparisons with MAVEN data: ELECTRON TEMPERATURE AT MARS
journal, July 2016
- Sakai, Shotaro; Andersson, Laila; Cravens, Thomas E.
- Journal of Geophysical Research: Space Physics, Vol. 121, Issue 7
Factors controlling ionospheric outflows as observed at intermediate altitudes
journal, January 2005
- Strangeway, R. J.
- Journal of Geophysical Research, Vol. 110, Issue A3
MHD model results of solar wind interaction with Mars and comparison with MAVEN plasma observations: COMPARISON WITH MAVEN OBSERVATIONS
journal, November 2015
- Ma, Y. J.; Russell, C. T.; Fang, X.
- Geophysical Research Letters, Vol. 42, Issue 21
Solar wind electron precipitation into the dayside Martian upper atmosphere through the cusps of strong crustal fields
journal, December 2014
- Xu, Shaosui; Liemohn, Michael W.; Mitchell, David L.
- Journal of Geophysical Research: Space Physics, Vol. 119, Issue 12
The plasma Environment of Mars
journal, March 2004
- Nagy, A. F.; Winterhalter, D.; Sauer, K.
- Space Science Reviews, Vol. 111, Issue 1/2
The polar wind and the terrestrial helium budget
journal, November 1968
- Axford, W. I.
- Journal of Geophysical Research, Vol. 73, Issue 21
Transterminator ion flow in the Martian ionosphere
journal, September 2010
- Fränz, M.; Dubinin, E.; Nielsen, E.
- Planetary and Space Science, Vol. 58, Issue 11
Pickup oxygen ion velocity space and spatial distribution around Mars: PICKUP OXYGEN IONS AROUND MARS
journal, February 2008
- Fang, Xiaohua; Liemohn, Michael W.; Nagy, Andrew F.
- Journal of Geophysical Research: Space Physics, Vol. 113, Issue A2
Heavy ion escape from Mars, influence from solar wind conditions and crustal magnetic fields
journal, October 2011
- Nilsson, Hans; Edberg, Niklas J. T.; Stenberg, Gabriella
- Icarus, Vol. 215, Issue 2
The Earth: Plasma Sources, Losses, and Transport Processes
journal, September 2015
- Welling, Daniel T.; André, Mats; Dandouras, Iannis
- Space Science Reviews, Vol. 192, Issue 1-4
Oxygen ion escape at Mars in a hybrid model: High energy and low energy ions
journal, March 2010
- Kallio, Esa; Liu, Kaijun; Jarvinen, Riku
- Icarus, Vol. 206, Issue 1
Magnetic Field and Plasma Observations at Mars: Initial Results of the Mars Global Surveyor Mission
journal, March 1998
- Acuña, M. H.
- Science, Vol. 279, Issue 5357
Factors controlling the location of the Bow Shock at Mars: FACTORS CONTROLLING THE SHOCK LOCATION
journal, May 2002
- Vignes, D.; Acuña, M. H.; Connerney, J. E. P.
- Geophysical Research Letters, Vol. 29, Issue 9
Estimates of Ionospheric Transport and Ion Loss at Mars
journal, October 2017
- Cravens, T. E.; Hamil, O.; Houston, S.
- Journal of Geophysical Research: Space Physics, Vol. 122, Issue 10
Numerical simulations of ion and electron temperatures in the ionosphere of Mars: Multiple ions and diurnal variations
journal, January 2014
- Matta, Majd; Galand, Marina; Moore, Luke
- Icarus, Vol. 227
Martian shock and magnetic pile-up boundary positions and shapes determined from the Phobos 2 and Mars Global Surveyor data sets
journal, April 2006
- Trotignon, J. G.; Mazelle, C.; Bertucci, C.
- Planetary and Space Science, Vol. 54, Issue 4
The Induced Magnetospheres of Mars, Venus, and Titan
journal, November 2011
- Bertucci, C.; Duru, F.; Edberg, N.
- Space Science Reviews, Vol. 162, Issue 1-4
The Langmuir Probe and Waves (LPW) Instrument for MAVEN
journal, September 2015
- Andersson, L.; Ergun, R. E.; Delory, G. T.
- Space Science Reviews, Vol. 195, Issue 1-4
Electric Mars: The first direct measurement of an upper limit for the Martian “polar wind” electric potential: THE POLAR WIND AT MARS
journal, November 2015
- Collinson, Glyn; Mitchell, David; Glocer, Alex
- Geophysical Research Letters, Vol. 42, Issue 21
The Solar Wind Ion Analyzer for MAVEN
journal, November 2013
- Halekas, J. S.; Taylor, E. R.; Dalton, G.
- Space Science Reviews, Vol. 195, Issue 1-4
The importance of thermal electron heating in Titan's ionosphere: Comparison with Cassini T34 flyby: THERMAL ELECTRON HEATING OF TITAN
journal, October 2011
- Ma, Y. J.; Russell, C. T.; Nagy, A. F.
- Journal of Geophysical Research: Space Physics, Vol. 116, Issue A10
Dayside electron temperature and density profiles at Mars: First results from the MAVEN Langmuir probe and waves instrument: DAYSIDE ELECTRON TEMPERATURES AT MARS
journal, November 2015
- Ergun, R. E.; Morooka, M. W.; Andersson, L. A.
- Geophysical Research Letters, Vol. 42, Issue 21
Field‐Aligned Potentials at Mars From MAVEN Observations
journal, October 2018
- Xu, Shaosui; Mitchell, David L.; McFadden, James P.
- Geophysical Research Letters, Vol. 45, Issue 19
First results of the MAVEN magnetic field investigation: MAVEN MAGNETIC FIELD INVESTIGATION
journal, November 2015
- Connerney, J. E. P.; Espley, J. R.; DiBraccio, G. A.
- Geophysical Research Letters, Vol. 42, Issue 21
The role of the Martian crustal magnetic fields in controlling ionospheric loss: Brecht and Ledvina: Crustal magnetic fields and escape ions
journal, August 2014
- Brecht, Stephen H.; Ledvina, Stephen A.
- Geophysical Research Letters, Vol. 41, Issue 15
The Mars Atmosphere and Volatile Evolution (MAVEN) Mission
journal, April 2015
- Jakosky, B. M.; Lin, R. P.; Grebowsky, J. M.
- Space Science Reviews, Vol. 195, Issue 1-4
The solar wind interaction with Mars: Locations and shapes of the bow shock and the magnetic pile-up boundary from the observations of the MAG/ER Experiment onboard Mars Global Surveyor
journal, January 2000
- Vignes, D.; Mazelle, C.; Rme, H.
- Geophysical Research Letters, Vol. 27, Issue 1
The MAVEN Solar Wind Electron Analyzer
journal, February 2016
- Mitchell, D. L.; Mazelle, C.; Sauvaud, J. -A.
- Space Science Reviews, Vol. 200, Issue 1-4
Martian Atmospheric Erosion Rates
journal, January 2007
- Barabash, S.; Fedorov, A.; Lundin, R.
- Science, Vol. 315, Issue 5811
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