Viacheslav Merkin Print


  240-228-1756

  Slava.Merkin@jhuapl.edu

: SES

:   Space physicist

:  Heliophysics

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Degree Field of Study Year Attained Institution Name
PhD Physics 2004 University of Maryland at College Park
MS Physics 1999 Moscow Institute of Physics and Technology
BS Physics and Applied Mathematics 1997 Moscow Institute of Physics and Technology

Dr. Merkin has ~20 years of experience in numerical modeling of space plasmas, in particular, magnetohydrodynamic (MHD) simulations of the Earth’s magnetosphere and inner heliosphere. He has been deeply involved in the development of the Lyon-Fedder-Mobarry (LFM) MHD model of the global magnetosphere, its regional magnetotail (LFMBOX) and heliospheric adaptations (LFM-helio) of which he was the primary author. More recently, he has initiated and lead the project devoted to the full redevelopment of LFM code, now named Gamera. Dr. Merkin is an expert in the physics of the magnetosphere-ionosphere (MI) coupling, with the focus on its treatment in global simulations. He is the author of the MI coupling modules within the LFM, and now Gamera, codes. Dr. Merkin’s work on the development of space plasma simulation codes, and coupling between different physical regions and regimes, has spanned the domains from Earth’s ionosphere, to the magnetosphere and solar wind. He has contributed to many areas of space plasma research, including the physics of the strongly driven magnetosphere, magnetopause boundary instabilities, magnetotail stability and reconnection, particle acceleration, and heliospheric magnetic structure among others. Dr. Merkin is an active member of the space science community: the models he has developed are available through the Community Coordinated Modeling Center to a wide range of scientists; he has served as a Research Area Coordinator for the Geospace Environment Modeling community; and he regularly serves on review panels.

 
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Start Year End Year Description
2019 Current Principal Professional Staff, The Johns Hopkins University Applied Physics Laboratory
2015 Current Theory and Modeling Section Supervisor, The Johns Hopkins University Applied Physics Laboratory
2010 2019 Senior Professional Staff II, The Johns Hopkins University Applied Physics Laboratory
2007 2010 Senior Research Associate/Scientist, Astronomy Department, Boston University
2004 2007 Research Associate, Astronomy Department, Boston University
Year Description
2002 - Present American Geophysical Union
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The following publication information was downloaded from

ORCID logo https://orcid.org/

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Binzheng Zhang, Kareem A. Sorathia, John G. Lyon, Viacheslav G. Merkin, Michael Wiltberger, (2019), Conservative averaging-reconstruction techniques (Ring Average) for 3-D finite-volume MHD solvers with axis singularity, Journal of Computational Physics, 376, 276-294

J. Birn, V. G. Merkin, M. I. Sitnov, A. Otto, (2018), MHD Stability of Magnetotail Configurations With a B-z Hump, Journal of Geophysical Research-Space Physics, 123, 3477-3492

V. A. Sergeev, E. I. Gordeev, V. G. Merkin, M. I. Sitnov, (2018), Does a Local B-Minimum Appear in the Tail Current Sheet During a Substorm Growth Phase?, Geophysical Research Letters, 45, 2566-2573

M. I. Sitnov, V. G. Merkin, V. Roytershteyn, M. Swisdak, (2018), Kinetic Dissipation Around a Dipolarization Front, Geophysical Research Letters, 45, 4639-4647

Kareem A. Sorathia, Aleksandr Y. Ukhorskiy, Viacheslav G. Merkin, Joseph F. Fennell, Seth G. Claudepierre, (2018), Modeling the Depletion and Recovery of the Outer Radiation Belt During a Geomagnetic Storm: Combined MHD and Test Particle Simulations, Journal of Geophysical Research-Space Physics, 123, 5590-5609

A. Y. Ukhorskiy, K. A. Sorathia, V. G. Merkin, M. I. Sitnov, D. G. Mitchell, M. Gkioulidou, (2018), Ion Trapping and Acceleration at Dipolarization Fronts: High-Resolution MHD and Test-Particle Simulations, Journal of Geophysical Research-Space Physics, 123, 5580-5589

B. Zhang, P. A. Delamere, X. Ma, B. Burkholder, M. Wiltberger, J. G. Lyon, V. G. Merkin, K. A. Sorathia, (2018), Asymmetric Kelvin-Helmholtz Instability at Jupiter's Magnetopause Boundary: Implications for Corotation-Dominated Systems, Geophysical Research Letters, 45, 56-63

Brian J. Anderson, Haje Korth, Daniel T. Welling, Viacheslav G. Merkin, Michael J. Wiltberger, Joachim Raeder, Robin J. Barnes, Colin L. Waters, Antti A. Pulkkinen, Lutz Rastaetter, (2017), Comparison of predictive estimates of high-latitude electrodynamics with observations of global-scale Birkeland currents, Space Weather-the International Journal of Research and Applications, 15, 352-373

P. A. Cassak, K. J. Genestreti, J. L. Burch, T. -D. Phan, M. A. Shay, M. Swisdak, J. F. Drake, L. Price, S. Eriksson, R. E. Ergun, B. J. Anderson, V. G. Merkin, C. M. Komar, (2017), The Effect of a Guide Field on Local Energy Conversion During Asymmetric Magnetic Reconnection: Particle-in-Cell Simulations, Journal of Geophysical Research-Space Physics, 122, 11523-11542

E. Gordeev, V. Sergeev, N. Tsyganenko, M. Kuznetsova, L. Rastaeetter, J. Raeder, G. Toth, J. Lyon, V. Merkin, M. Wiltberger, (2017), The substorm cycle as reproduced by global MHD models, Space Weather-the International Journal of Research and Applications, 15, 131-149

Evgeny Gordeev, Victor Sergeev, Viacheslav Merkin, Maria Kuznetsova, (2017), On the origin of plasma sheet reconfiguration during the substorm growth phase, Geophysical Research Letters, 44, 8696-8702

M. I. Sitnov, V. G. Merkin, P. L. Pritchett, M. Swisdak, (2017), Distinctive features of internally driven magnetotail reconnection, Geophysical Research Letters, 44, 3028-3037

K. A. Sorathia, V. G. Merkin, A. Y. Ukhorskiy, B. H. Mauk, D. G. Sibeck, (2017), Energetic particle loss through the magnetopause: A combined global MHD and test-particle study, Journal of Geophysical Research-Space Physics, 122, 9329-9343

A. Y. Ukhorskiy, M. I. Sitnov, V. G. Merkin, M. Gkioulidou, D. G. Mitchell, (2017), Ion acceleration at dipolarization fronts in the inner magnetosphere, Journal of Geophysical Research-Space Physics, 122, 3040-3054

Chih-Ping Wang, V. G. Merkin, Vassilis Angelopoulos, (2017), Mesoscale perturbations in midtail lobe/mantle during steady northward IMF: ARTEMIS observation and MHD simulation, Journal of Geophysical Research-Space Physics, 122, 6430-6441

M. Wiltberger, V. Merkin, B. Zhang, F. Toffoletto, M. Oppenheim, W. Wang, J. G. Lyon, J. Liu, Y. Dimant, M. I. Sitnov, G. K. Stephens, (2017), Effects of electrojet turbulence on a magnetosphere-ionosphere simulation of a geomagnetic storm, Journal of Geophysical Research-Space Physics, 122, 5008-5027

M. Wiltberger, E. J. Rigler, V. Merkin, J. G. Lyon, (2017), Structure of High Latitude Currents in Magnetosphere-Ionosphere Models, Space Science Reviews, 206, 575-598

V. G. Merkin, D. Kondrashov, M. Ghil, B. J. Anderson, (2016), Data assimilation of low-altitude magnetic perturbations into a global magnetosphere model, Space Weather-the International Journal of Research and Applications, 14, 165-184

Brian J. Anderson, Christopher T. Russell, Robert J. Strangeway, Ferdinand Plaschke, Werner Magnes, David Fischer, Haje Korth, Viacheslav G. Merkin, Robin J. Barnes, Colin L. Waters, Ian J. Cohen, Joseph H. Westlake, Barry H. Mauk, Hannes K. Leinweber, Daniel J. Gershman, Barbara L. Giles, Guan Le, Roy B. Torbert, James L. Burch, (2016), Electrodynamic context of magnetopause dynamics observed by magnetospheric multiscale, Geophysical Research Letters, 43, 5988-5996

V. G. Merkin, R. Lionello, J. G. Lyon, J. Linker, T. Torok, C. Downs, (2016), COUPLING OF CORONAL AND HELIOSPHERIC MAGNETOHYDRODYNAMIC MODELS: SOLUTION COMPARISONS AND VERIFICATION, Astrophysical Journal, 831

V. G. Merkin, J. G. Lyon, D. Lario, C. N. Arge, C. J. Henney, (2016), Time-dependent magnetohydrodynamic simulations of the inner heliosphere, Journal of Geophysical Research-Space Physics, 121, 2866-2890

V. G. Merkin, M. I. Sitnov, (2016), Stability of magnetotail equilibria with a tailward B-z gradient, Journal of Geophysical Research-Space Physics, 121, 9411-9426

A. A. Samsonov, E. Gordeev, N. A. Tsyganenko, J. Safrankova, Z. Nemecek, J. Simunek, D. G. Sibeck, G. Toth, V. G. Merkin, J. Raeder, (2016), Do we know the actual magnetopause position for typical solar wind conditions?, Journal of Geophysical Research-Space Physics, 121, 6493-6508

M. I. Sitnov, V. G. Merkin, (2016), Generalizedmagnetotail equilibria: Effects of the dipole field, thin current sheets, and magnetic flux accumulation, Journal of Geophysical Research-Space Physics, 121, 7664-7683

Kazue Takahashi, Dong-Hun Lee, Viacheslav G. Merkin, John G. Lyon, Michael D. Hartinger, (2016), On the origin of the dawn-dusk asymmetry of toroidal Pc5 waves, Journal of Geophysical Research-Space Physics, 121, 9632-9650

K. Garcia-Sage, T. E. Moore, A. Pembroke, V. G. Merkin, W. J. Hughes, (2015), Modeling the effects of ionospheric oxygen outflow on bursty magnetotail flows, Journal of Geophysical Research-Space Physics, 120, 8723-8737

V. G. Merkin, M. I. Sitnov, J. G. Lyon, (2015), Evolution of generalized two-dimensional magnetotail equilibria in ideal and resistive MHD, Journal of Geophysical Research-Space Physics, 120, 1993-2014

M. Wiltberger, V. Merkin, J. G. Lyon, S. Ohtani, (2015), High-resolution global magnetohydrodynamic simulation of bursty bulk flows, Journal of Geophysical Research-Space Physics, 120, 4555-4566

S. Xi, W. Lotko, B. Zhang, O. J. Brambles, J. G. Lyon, V. G. Merkin, M. Wiltberger, (2015), Poynting flux-conserving low-altitude boundary conditions for global magnetospheric models, Journal of Geophysical Research-Space Physics, 120, 384-400

B. J. Anderson, H. Korth, C. L. Waters, D. L. Green, V. G. Merkin, R. J. Barnes, L. P. Dyrud, (2014), Development of large-scale Birkeland currents determined from the Active Magnetosphere and Planetary Electrodynamics Response Experiment, Geophysical Research Letters, 41, 3017-3025

S. Ohtani, S. Wing, V. G. Merkin, T. Higuchi, (2014), Solar cycle dependence of nightside field-aligned currents: Effects of dayside ionospheric conductivity on the solar wind-magnetosphere-ionosphere coupling, Journal of Geophysical Research-Space Physics, 119, 322-334

M. I. Sitnov, V. G. Merkin, M. Swisdak, T. Motoba, N. Buzulukova, T. E. Moore, B. H. Mauk, S. Ohtani, (2014), Magnetic reconnection, buoyancy, and flapping motions in magnetotail explosions, Journal of Geophysical Research-Space Physics, 119

V. G. Merkin, B. J. Anderson, J. G. Lyon, H. Korth, M. Wiltberger, T. Motoba, (2013), Global evolution of Birkeland currents on 10 min timescales: MHD simulations and observations, Journal of Geophysical Research-Space Physics, 118, 4977-4997

V. G. Merkin, J. G. Lyon, S. G. Claudepierre, (2013), Kelvin-Helmholtz instability of the magnetospheric boundary in a three-dimensional global MHD simulation during northward IMF conditions, Journal of Geophysical Research-Space Physics, 118, 5478-5496

M. I. Sitnov, N. Buzulukova, M. Swisdak, V. G. Merkin, T. E. Moore, (2013), Spontaneous formation of dipolarization fronts and reconnection onset in the magnetotail, Geophysical Research Letters, 40, 22-27

A. Y. Ukhorskiy, M. I. Sitnov, V. G. Merkin, A. V. Artemyev, (2013), Rapid acceleration of protons upstream of earthward propagating dipolarization fronts, Journal of Geophysical Research-Space Physics, 118, 4952-4962

D. M. Pahud, V. G. Merkin, C. N. Arge, W. J. Hughes, S. M. McGregor, (2012), An MHD simulation of the inner heliosphere during Carrington rotations 2060 and 2068: Comparison with MESSENGER and ACE spacecraft observations, Journal of Atmospheric and Solar-Terrestrial Physics, 83, 32-38

Asher Pembroke, Frank Toffoletto, Stanislav Sazykin, Michael Wiltberger, John Lyon, Viacheslav Merkin, Peter Schmitt, (2012), Initial results from a dynamic coupled magnetosphere-ionosphere-ring current model, Journal of Geophysical Research-Space Physics, 117

R. E. Lopez, V. G. Merkin, J. G. Lyon, (2011), The role of the bow shock in solar wind-magnetosphere coupling, Annales Geophysicae, 29, 1129-1135

V. G. Merkin, J. G. Lyon, S. L. McGregor, D. M. Pahud, (2011), Disruption of a heliospheric current sheet fold, Geophysical Research Letters, 38

D. A. Subbotin, Y. Y. Shprits, M. Gkioulidou, L. R. Lyons, B. Ni, V. G. Merkin, F. R. Toffoletto, R. M. Thorne, R. B. Horne, M. K. Hudson, (2011), Simulation of the acceleration of relativistic electrons in the inner magnetosphere using RCM-VERB coupled codes, Journal of Geophysical Research-Space Physics, 116

K. S. Garcia, V. G. Merkin, W. J. Hughes, (2010), Effects of nightside O+ outflow on magnetospheric dynamics: Results of multifluid MHD modeling, Journal of Geophysical Research-Space Physics, 115

R. E. Lopez, R. Bruntz, E. J. Mitchell, M. Wiltberger, J. G. Lyon, V. G. Merkin, (2010), Role of magnetosheath force balance in regulating the dayside reconnection potential, Journal of Geophysical Research-Space Physics, 115

V. G. Merkin, J. G. Lyon, (2010), Effects of the low-latitude ionospheric boundary condition on the global magnetosphere, Journal of Geophysical Research-Space Physics, 115

V. G. Merkin, D Vassiliadis, SF Fung, X Shao, IA Daglis, JD Huba, (2010), Effects of ionospheric O+ on the magnetopause boundary wave activity, Modern Challenges in Nonlinear Plasma Physics: a Festschrift Honoring the Career of Dennis Papadopoulos, 1320, 208-212

T. I. Pulkkinen, M. Palmroth, H. E. J. Koskinen, T. V. Laitinen, C. C. Goodrich, V. G. Merkin, J. G. Lyon, (2010), Magnetospheric modes and solar wind energy coupling efficiency, Journal of Geophysical Research-Space Physics, 115

M. Wiltberger, W. Lotko, J. G. Lyon, P. Damiano, V. Merkin, (2010), Influence of cusp O+ outflow on magnetotail dynamics in a multifluid MHD model of the magnetosphere, Journal of Geophysical Research-Space Physics, 115

R. E. Lopez, J. G. Lyon, E. Mitchell, R. Bruntz, V. G. Merkin, S. Brogl, F. Toffoletto, M. Wiltberger, (2009), Why doesn't the ring current injection rate saturate?, Journal of Geophysical Research-Space Physics, 114

Timothy B. Guild, Harlan E. Spence, E. Larry Kepko, Viacheslav Merkin, John G. Lyon, Michael Wiltberger, Charles C. Goodrich, (2008), Geotail and LFM comparisons of plasma sheet climatology: 1. Average values, Journal of Geophysical Research-Space Physics, 113

Timothy B. Guild, Harlan E. Spence, E. Larry Kepko, Viacheslav Merkin, John G. Lyon, Michael Wiltberger, Charles C. Goodrich, (2008), Geotail and LFM comparisons of plasma sheet climatology: 2. Flow variability, Journal of Geophysical Research-Space Physics, 113

V. G. Merkin, N. U. Crooker, (2008), Solar concept of flux transport by interchange reconnection applied to the magnetosphere, Journal of Geophysical Research-Space Physics, 113

C. C. Goodrich, T. I. Pulkkinen, J. G. Lyon, V. G. Merkin, (2007), Magnetospheric convection during intermediate driving: Sawtooth events and steady convection intervals as seen in Lyon-Fedder-Mobarry global MHD simulations, Journal of Geophysical Research-Space Physics, 112

V. G. Merkin, C. C. Goodrich, (2007), Does the polar cap area saturate?, Geophysical Research Letters, 34

V. G. Merkin, J. G. Lyon, B. J. Anderson, H. Korth, C. C. Goodrich, K. Papadopoulos, (2007), A global MHD simulation of an event with a quasi-steady northward IMF component, Annales Geophysicae, 25, 1345-1358

V. G. Merkin, M. J. Owens, H. E. Spence, W. J. Hughes, J. M. Quinn, (2007), Predicting magnetospheric dynamics with a coupled Sun-to-Earth model: Challenges and first results, Space Weather-the International Journal of Research and Applications, 5

MJ Owens, VG Merkin, P Riley, (2006), A kinematically distorted flux rope model for magnetic clouds, Journal of Geophysical Research-Space Physics, 111

VG Merkin, G Milikh, K Papadopoulos, J Lyon, YS Dimant, AS Sharma, C Goodrich, M Wiltberger, (2005), Effect of anomalous electron heating on the transpolar potential in the LFM global MHD model, Geophysical Research Letters, 32

VG Merkin, AS Sharma, K Papadopoulos, G Milikh, J Lyon, C Goodrich, (2005), Global MHD simulations of the strongly driven magnetosphere: Modeling of the transpolar potential saturation, Journal of Geophysical Research-Space Physics, 110

VG Merkin, AS Sharma, K Papadopoulos, G Milikh, J Lyon, C Goodrich, (2005), Relationship between the ionospheric conductance, field aligned current, and magnetopause geometry: Global MHD simulations, Planetary and Space Science, 53, 873-879

VG Merkin, AS Sharma, K Papadopoulos, G Milikh, J Lyon, C Goodrich, (2005), Relationship between the ionospheric conductance, field aligned current, and magnetopause geometry: Global MHD simulations (vol 53, pg 873, 2005), Planetary and Space Science, 53, 1201

VG Merkine, K Papadopoulos, G Milikh, AS Sharma, X Shao, J Lyon, C Goodrich, (2003), Effects of the solar wind electric field and ionospheric conductance on the cross polar cap potential: Results of global MHD modeling, Geophysical Research Letters, 30