Michael Liemohn
Associate Professor
Atmospheric, Oceanic, and Space Sciences
University of Michigan
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Magnetosphere-Ionosphere Interactions Research Activities

Nearly every geospace publication I have authored could be listed here, but I am focusing this list to only those that specifically deal with mass coupling between the ionosphere and magnetosphere (precipitation or outflow) or electrodynamic coupling (via field-aligned currents and electric potentials). This is still most of my PhD-era photoelectron work and recent ring current work, but also a number of studies specifically on polar wind outflow and also energetic particle precipitation into the upper atmosphere.

Publications on magnetosphere-ionosphere coupling and interactions

2007

Fang, X., A. J. Ridley, M. W. Liemohn, J. U. Kozyra, and D. S. Evans, Global 30-240 keV proton precipitation in the 17-18 April 2002 geomagnetic storms: 3. Impact on the ionosphere and thermosphere, J. Geophys. Res., 112, A07310, doi: 10.1029/2006JA012144, 2007.

Fang, X., M. W. Liemohn, J. U. Kozyra, and D. S. Evans, Global 30-240 keV proton precipitation in the 17-18 April 2002 geomagnetic storms: 2. Conductances and beam spreading, J. Geophys. Res., 112, A05302, doi: 10.1029/2006JA012113, 2007.

Fang. X., M. W. Liemohn, J. U. Kozyra, D. Evans, A. DeJong, and B. Emery, Global 30-240 keV proton precipitation in the 17-18 April 2002 geomagnetic storms: 1. Patterns, J. Geophys. Res., 112, A05301, doi: 10.1029/2006JA011867, 2007.

Khazanov, G. V., K. V. Gamayunov, D. L. Gallagher, M. W. Liemohn, and J. U. Kozyra, Self-consistent model of magnetospheric ring current and propagating electromagnetic ion cyclotron waves, 2, Wave induced ring current precipitation and thermal electron heating, J. Geophys. Res., 112, A04209, doi: 10.1029/2006JA012033, 2007.

Zhang, J.-Ch., M. W. Liemohn, D. L. De Zeeuw, J. E. Borovsky, A. J. Ridley, S. Sazykin, M. F. Thomsen, J. U. Kozyra, T. I. Gombosi, and R. A. Wolf, Understanding storm-time ring current sources through data-model comparisons of a moderate storm, J. Geophys. Res., 112, A04208, doi: 10.1029/2006JA011846, 2007.

Liemohn, M. W., T. E. Moore, and P. D. Craven, Geospace activity dependence of cold, streaming ions in the near-Earth magnetotail, J. Atmos. Solar-Terr. Phys., 69, 135, 2007.

2006

Liemohn, M. W., A. J. Ridley, J. U. Kozyra, D. L. Gallagher, M. F. Thomsen, M. G. Henderson, M. H. Denton, P. C. Brandt, and J. Goldstein, Analyzing electric field morphology through data-model comparisons of the GEM IM/S Assessment Challenge events, J. Geophys. Res., 111, A11S11, doi: 10.1029/2006JA011700, 2006.

Liemohn, M. W., Introduction to the GEM Inner Magnetosphere/Storms Assessment Challenge, J. Geophys. Res., 111. A11S01, doi: 10.1029/2006JA011970, 2006.

2005

Liemohn, M. W., A. J. Ridley, P. C. Brandt, D. L. Gallagher, J. U. Kozyra, D. G. Mitchell, E. C. Roelof, and R. DeMajistre, Parametric analysis of nightside conductance effects on inner magnetospheric dynamics for the 17 April 2002 storm, J. Geophys. Res., 110, A12S22, doi: 10.1029/2005JA011109, 2005.

Gallagher, D. L., M. L. Adrian, and M. W. Liemohn, The origin and evolution of deep plasmaspheric notches, J. Geophys. Res., 110, A09201, doi: 10.1029/2004JA010906, 2005.

Moore, T. E., M.-C. Fok, M. O. Chandler, S.-H. Chen, S. P. Christon, D. C. Delcourt, J. Fedder, M. Liemohn, W. K. Peterson, and S. Slinker, Solar and ionospheric plasmas in the ring current, Inner Magnetosphere Interactions: New Perspectives from Imaging, AGU Monogr. Ser., vol. 159, ed. by J. L. Burch, M. Schulz, and H. Spence, p. 179, Am. Geophys. Un., Washington, D. C., 2005.

Liemohn, M. W., and P. C. Brandt, Small-scale structure in the stormtime ring current, Inner Magnetosphere Interactions: New Perspectives from Imaging, AGU Monogr. Ser., vol. 159, ed. by J. L. Burch, M. Schulz, and H. Spence, p. 167, Am. Geophys. Un., Washington, D. C., 2005.

Fang., X., M. W. Liemohn, J. U. Kozyra, and S. C. Solomon, Parametric study of the proton arc spreading effect on primary ionization rates, J. Geophys. Res., 110, A07302, doi: 10.1029/2004JA010915, 2005.

Liemohn, M. W., T. E. Moore, P. D. Craven, W. Maddox, A. F. Nagy, and J. U. Kozyra, Occurrence statistics of cold, streaming ions in the near-Earth magnetotail: Survey of Polar-TIDE observations, J. Geophys. Res., 110, A07211, doi: 10.1029/2004JA010801, 2005.

Moore, T. E., M.-C. Fok, M. O. Chandler, C. R. Chappell, S. Christon, D. Delcourt, J. Fedder, M. Huddleston, M. Liemohn, W. Peterson, S. P. Slinker, Plasma sheet and (non-storm) ring current formation from solar and polar wind sources, J. Geophys. Res., 110, A02210, doi: 10.1029/2004JA010563, 2005.

2004

Khazanov, G. V., M. W. Liemohn, M.-C. Fok, T. S. Newman, and A. J. Ridley, Stormtime particle energization with AMIE potentials, J. Geophys. Res., 109, A05209, doi: 10.1029/2003JA010186, 2004.

Fang, X., M. W. Liemohn, J. U. Kozyra, and S. C. Solomon, Monte Carlo simulation for the spreading effect of an auroral proton beam, J. Geophys. Res., 109, A04309, doi: 10.1029/2003JA010119, 2004.

Liemohn, M. W., A. J. Ridley, D. L. Gallagher, D. M. Ober, and J. U. Kozyra, Dependence of plasmaspheric morphology on the electric field description during the recovery phase of the April 17, 2002 magnetic storm, J. Geophys. Res., 109(A3), A03209, doi: 10.1029/2003JA010304, 2004.

Khazanov, G. V., M. W. Liemohn, T. S. Newman, M.-C. Fok, and A. J. Ridley, Magnetospheric convection electric field dynamics and stormtime particle energization: Case study of the magnetic storm of 4 May 1998, Ann. Geophys., 22, 497, 2004.

2003

Clauer, C. R., M. W. Liemohn, J. U. Kozyra, and M. L. Reno, The relationship of storms and substorms determined from mid-latitude ground-based magnetic maps, Disturbances in Geospace: The Storm-Substorm Relationship, AGU Monogr. Ser., vol. 142, edited by S. J. Sharma, p. 143, AGU, Washington, D. C., 2003.

Khazanov, G. V., T. S. Newman, M. W. Liemohn, M.-C. Fok, R. W. Spiro, Self-consistent magnetosphere-ionosphere coupling: theoretical studies, J. Geophys. Res., 107(A3), 1122, doi: 10.1029/2002JA009624, 2003. (and correction )

2002

Liemohn, M. W., and A. J. Ridley, Comment on "Nonlinear response of the polar ionosphere to large values of the interplanetary electric field" by C. T. Russell et al., J. Geophys. Res., 107(A12), 1460, doi: 10.1029/2002JA009440, 2002.

Ridley, A. J., and M. W. Liemohn, A model-derived description of the penetration electric field, J. Geophys. Res., 107(A8), 1151, doi: 10.1029/2001JA000051, 2002.

Khazanov, G. V., and M. W. Liemohn, Transport of photoelectrons in the nightside magnetosphere, J. Geophys. Res., 107(A5), 1064, doi: 10.1029/2001JA000163, 2002.

Liemohn, M. W., J. U. Kozyra, M. R. Hairston, D. M. Weimer, G. Lu, A. J. Ridley, T. H. Zurbuchen, and R. M. Skoug, Consequences of a saturated convection electric field on the ring current, Geophys. Res. Lett., 29(9), 1348, doi: 10.1029/2001GL014270, 2002.

2001

Liemohn, M. W., J. U. Kozyra, C. R. Clauer, and A. J. Ridley, Computational analysis of the near-Earth magnetospheric current system, J. Geophys. Res., 106, 29,531, 2001.

2000

Khazanov, G. V., and M. W. Liemohn, Kinetic theory of superthermal electron transport, in Recent Research Developments in Geophysics, vol. 3 (part 2), edited by S. G. Pandalai, pp. 181-201, Research Signpost, Trivandrum, India, 2000.

Ganguli, G., M. A. Reynolds, and M. W. Liemohn, Recent advances in plasmaspheric research, J. Atmos Solar.-Terr. Physics, 62, 1647, 2000.

Liemohn, M. W., J. U. Kozyra, P. G. Richards, G. V. Khazanov, M. J. Buonsanto, and V. K. Jordanova, Ring current heating of the thermal electrons at solar maximum, J. Geophys. Res., 105, 27,767, 2000.

Khazanov, G. V., M. W. Liemohn, J. U. Kozyra, and D. L. Gallagher, Global energy deposition to the topside ionosphere from superthermal electrons, J. Atmos. Solar-Terr. Physics, 62, 947, 2000.

Liemohn, M. W., J. U. Kozyra, G. V. Khazanov, and P. D. Craven, Effects of various transport processes on the streaming ion density during the first stage of plasmaspheric refilling, J. Atmos. Solar-Terr. Physics 62, 437, 2000.

1999

Liemohn, M. W., G. V. Khazanov, P. D. Craven, and J. U. Kozyra, Nonlinear kinetic modeling of early stage plasmaspheric refilling, J. Geophys. Res., 104, 10,295, 1999.

1998

Liemohn, M. W., and G. V. Khazanov, Determining the significance of electrodynamic coupling between superthermal electrons and thermal plasma, Geospace Mass and Energy Flow, Geophys. Monogr. Ser., vol. 104, edited by J. L. Horwitz, D. L. Gallagher, and W. K. Peterson, p. 343, AGU, Washington, D. C., 1998.

Khazanov, G. V., M. W. Liemohn, T. E. Moore, and E. N. Krivorutsky, Generalized kinetic description of steady-state interactions of a plasma with an arbitrary potential energy structure, J. Geophys. Res., 103, 6871, 1998.

Liemohn, M. W., and G. V. Khazanov, Collisionless plasma modeling in an arbitrary potential energy distribution, Phys. Plasmas, 5, 580, 1998.

1997

Liemohn, M. W., G. V. Khazanov, T. E. Moore, and S. M. Guiter, Self-consistent superthermal electron effects on plasmaspheric refilling, J. Geophys. Res., 102, 7523, 1997.

Khazanov, G. V., M. W. Liemohn, and T. E. Moore, Photoelectron effects on the self-consistent potential in the collisionless polar wind, J. Geophys. Res., 102, 7509, 1997.

1996

Khazanov, G. V., T. E. Moore, M. W. Liemohn, V. K. Jordanova, and M.-C. Fok, Global collisional model of high-energy photoelectrons, Geophys. Res. Lett., 23, 331, 1996.