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Thayer

School of

Engineering

Dartmouth

College

William Lotko

Thayer School of Engineering

Dartmouth College

Hanover, NH 03755 USA

1-603-646-3485 (office)

Office: 217b Cummings

wlotko@dartmouth.edu

www.dartmouth.edu/~wlotko

My research within the broader field of geospace science focuses on system-level studies of the solar wind-magnetosphere-ionosphere interaction, its plasma electrodynamics, magnetohydrodynamics, and collisionless transport processes, with applications to space weather prediction. With my students and research collaborators, I am currently investigating and developing simulation models for ionospheric outflows into the magnetosphere; electron precipitation into the high-latitude ionosphere and thermosphere; plasma kinetics that enable superfluent ion outflows and electron precipitation; and the effects of all of these processes on global geospace dynamics. 

I serve as Principal Investigator for Dartmouth’s Heliophysics Theory Project sponsored by NASA, and I am a co-investigator with the Center for Integrated Space Weather Modeling, a multi-institutional Science and Technology Center sponsored by NSF.  I am also Principal Investigator on an NSF project to improve capabilities to predict electron precipitation in geospace weather and on a NASA project to explore the hypothesis that ionospheric outflows are integral in the development of a planetary-scale oscillation known as the magnetospheric sawtooth mode. 

I  teach courses at Dartmouth in engineering design, applied mathematics, electromagnetic fields and waves, magnetohydrodynamics and plasma physics, space systems engineering, and on issues in technology and society.  In past years I have served the School of Engineering as Director of its MS/PhD Program, Senior Associate Dean, and Interim Dean, and my research community as editor-in-chief of the Journal of Atmospheric and Solar-Terrestrial Physics, associate editor of Journal of Geophysical Research and Geophysical Research Letters, convener of many scientific sessions, workshops and symposia, and panelist and contributing author for two National Academy of Science Decadal Surveys of Solar and Space Physics.

Presentations
	Does geospace exercise self control?  (5M)
	Ionospheric Outflow and Magnetosphere-Ionosphere Coupling  (11M)
	7-8 November 2004 superstorm: Global simulations with causally regulated outflow  (3M)
	Ionospheric-Magnetospheric Plasma Redistribution During Storms  (5M)
	Magnetosphere-Ionosphere-Thermosphere Coupling in Geospace Dynamics  (7M)
	Engineering in Liberal Education and Liberal Education in Engineering  (1M)

Recent Publications

• Enhancement of thermospheric mass density by soft electron precipitation, Zhang, B., W. Lotko, O. Brambles, M. Wiltberger, W. Wang, P. Schmitt, and J. Lyon, Geophys. Res. Lett. 39, L20102, doi:10.1029/2012GL053519, 2012 (250K)

• Magnetotail origins of auroral Alfvénic power, B. Zhang, W. Lotko, O. Brambles, P. Damiano, M. Wiltberger, and J. Lyon,   J. Geophys. Res. 117, A09205, doi:10.1029/2012JA017680, 2012 (1.2M)

• Magnetosphere sawtooth oscillations induced by ionospheric outflow, O.J. Brambles, W. Lotko, B. Zhang, M. Wiltberger, J. Lyon, and R.J. Strangeway, Science 332, 1183, doi:10.1126/science.1202869, 2011 (1.5M)

• A statistical study of magnetosphere-ionosphere coupling in the LFM global MHD model, B. Zhang,  W. Lotko, M.J. Wiltberger, O.J. Brambles, and P.A. Damiano, J. Atmos. Sol.-Terr. Phys. 73( 5-6), 686-702, doi:10.1016/j.jastp.2010.09.027, 2011  (6.5M)

• Effects of causally driven cusp O⁺ outflow on the stormtime M-I system using a multifluid global simulation, O.J. Brambles, W. Lotko, P.A. Damiano, B. Zhang, and M. Wiltberger, and J. Lyon, J. Geophys. Res. 115, A00J04, doi:10.1029/2010JA015469, 2010  (2.3M)

• Solar wind driving of magnetospheric ULF waves: Field line resonances driven by dynamic pressure, S.G. Claudepierre, M.K. Hudson, W. Lotko, J.G. Lyon, and R.E. Denton, fluctuations, J. Geophys. Res. 115, A11202, doi:10.1029/2010JA015399, 2010  (2M)

• Effects of solar wind dynamic pressure on the ionospheric O⁺ fluence during the 31 August 2005 storm, P.A. Damiano, O.J. Brambles, W. Lotko, B. Zhang, and M. Wiltberger, J. Lyon, J. Geophys. Res. 115, A00J07, doi:10.1029/2010JA015583, 2010  (467K)

• Influence of cusp O⁺ outflow on magnetotail dynamics in a multifluid MHD model of the magnetosphere, M. Wiltberger, W. Lotko, J. G. Lyon, P. Damiano, and V. Merkin, J. Geophys. Res. 115, A00J05, doi:10.1029/2010JA015579, 2010  (717K)

• Modeling seasonal variations of auroral particle precipitation in a global-scale magnetosphere-ionosphere simulation, M. Wiltberger, R.S. Weigel,  W. Lotko, J.A. Fedder, J. Geophys. Res. 114, A01204, doi:10.1029/2008JA013108, 2009  (1M)

• Magnetospheric cavity modes driven by solar wind dynamic pressure fluctuations, S.G. Claudepierre, S.G., M. Wiltberger, S.R. Elkington, W. Lotko, M.K. Hudson, Geophys. Res. Lett. 36, L13101, doi:10.1029/2009GL039045, 2009   (271K)

• Coupling between density structures, electromagnetic waves and ionospheric feedback in the auroral zone,  A.V. Streltsov and W. Lotko, J. Geophys. Res. 113, A05212, doi:10.1029/2007JA012594, 2008   (26M)

• Effect of the radial boundary condition on Alfvén wave dynamics in reduced magnetohydrodynamics, R.E. Denton, B. Rogers, W. Lotko, and A.V. Streltsov, Phys. Plasmas 15, 032106, doi:10.1063/1.2898409, 2008   (221K)

• Nonlinear finite-Larmor-radius effects in reduced fluid models, A.J. Brizard, R.E. Denton,  B. Rogers, W. Lotko, Phys. Plasmas 15, 082302, 2008   (843K)

• A multidisciplinary approach to introductory engineering design, P.J. Robbie, I. Baker, W. Lotko, and J.P. Collier, 2008 IEEE Frontiers in Education Conference, F1F-1-6, doi:10.1109/FIE.2008.4720310, 2008  (1.3M)

• Reduced magnetohydrodynamic equations with coupled Alfvén and sound wave dynamics, R.E. Denton, B. Rogers, W. Lotko, Phys. Plasmas 14, 102906, 2007   (142K)

• Ground and satellite observations of the evolution of growth phase auroral arcs, M.R. Lessard, W. Lotko, J. LaBelle, W. Peria, C.W.. Carlson, F. Creutzberg, D.D. Wallis, J. Geophys. Res. 112, A09304, doi:10.1029/2007JA011794, 2007   (904K)

• The magnetosphere-ionosphere system from the perspective of plasma circulation: A tutorial, W. Lotko, J. Atmos. Solar-Terr. Phys. 69, 191–211, doi:10.1016/j.jastp.2006.08.011, 2007   (1.7M)

• Localized parallel electric fields associated with inertial Alfvén waves, R.E. Ergun, L. Andersson, Y.-J. Su, D.L. Newman, M.V. Goldman, W. Lotko, C.C. Chaston and C.W. Carlson, Phys. Plasmas 12, 072901, 2005   (899K)

• Some properties of Alfvén waves: Observations in the tail lobes and the plasma sheet boundary layer, A. Keiling, G.K. Parks, J.R. Wygant, J. Dombeck, F.S. Mozer, C.T. Russell, A.V. Streltsov and W. Lotko, J. Geophys. Res. 110, A10S11, doi:10.1029/2004JA010907, 2005   (789K)

• Ultralow-frequency electrodynamics of the magnetosphere-ionosphere interaction, A.V. Streltsov and W. Lotko, J. Geophys. Res. 110(A08203), doi:10.1029/2004JA010764, 2005 (485K)

• Multiscale electrodynamics of the ionosphere-magnetosphere system, A.V. Streltsov and W. Lotko, J. Geophys. Res 109(A09214), doi:10.1029/2004JA010457, 2004   (761K)

• Inductive magnetosphere-ionosphere coupling, W. Lotko, J. Atmos. Solar-Terr. Phys., 66/15-16, 1443-1456, doi:10.1016/j.jastp.2004.03.027, 2004   (359K)

• Auroral Plasma Physics (Space Science Series of ISSI, vol. 15), ed. by G. Paschmann, S. Haaland and R. Treumann, contributing author, Kluwer Academic Publishers, 2003

• The Sun to Earth and Beyond: Panel Reports, contributing author, Report of the Panel on Theory, Modeling, and Data Exploration, National Academy Press, p.183-210, 2003

William Lotko | Thayer School of Engineering | Dartmouth College
Questions? Comments? Contact William.Lotko@Dartmouth.edu | Phone: 01-603-646-3485