django-publications

M. R. Negale, M. J. Taylor, M. J. Nicolls, S. L. Vadas, K. Nielsen, and C. J. Heinselman
Seasonal propagation characteristics of MSTIDs observed at high latitudes over Central Alaska using the Poker Flat Incoherent Scatter Radar
Journal of Geophysical Research: Space Physics, 2018
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M. M. J. Ruohoniemi, J. Baker, C. Clauer, M. Nicolls, and M. Hairston
RISR-N observations of the IMF By influence on reverse convection during extreme northward IMF
J. Geophys. Res. Space Physics, 2017
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S. Zou, A. Ridley, X. Jia, E. Boyd, M. Nicolls, A. Coster, E. Thomas, and J. M. Ruohoniemi
PFISR observation of intense ion upflow fluxes associated with an SED during the 1 June 2013 geomagnetic storm
J. Geophys. Res. Space Physics, 2017
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Y. Shen, D. J. Knudsen, J. K. Burchill, A. Howarth, A. Yau, R. J. Redmon, D. M. Miles, R. H. Varney, and M. J. Nicolls
Strong ambipolar-driven ion upflow within the cleft ion fountain during low geomagnetic activity
J. Geophys. Res. Space Physics, 2016
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R. G. Gillies, A. van Eyken, E. Spanswick, M. Nicolls, J. Kelly, M. Greffen, D. Knudsen, M. Connors, M. Schutzer, T. Valentic, M. Malone, J. Buonocore, J.-P. St.-Maurice, and E. Donovan
First observations from the RISR-C incoherent scatter radar
Radio Science, 2016
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C. R. Clauer, Z. Xu, M. Maimaiti, J. M. Ruohoniemi, W. Scales, M. D. Hartinger, M. J. Nicolls, S. Kaeppler, F. D. Wilder, and R. E. Lopez
Investigation of a rare event where the polar ionospheric reverse convection potential does not saturate during a period of extreme northward IMF solar wind driving
J. Geophys. Res. Space Physics, 2016
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S.-R. Zhang, J. M. Holt, P. J. Erickson, L. P. Goncharenko, M. J. Nicolls, M. McCready, and J. Kelly
Ionospheric ion temperature climate and upper atmospheric long-term cooling
J. Geophys. Res. Space Physics, 2016
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C. Yue, W. Li, Y. Nishimura, Q. Zong, Q. Ma, J. Bortnik, R. M. Thorne, G. D. Reeves, H. E. Spence, C. A. Kletzing, J. R. Wygant, and M. J. Nicolls
Rapid enhancement of low-energy (<100 eV) ion flux in response to interplanetary shocks based on two Van Allen Probes case studies: Implications for source regions and heating mechanisms.
J. Geophys. Res. Space Physics, 2016
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S. R. Kaeppler, D. L. Hampton, M. J. Nicolls, A. Strømme, S. C. Solomon, J. H. Hecht, and M. G. Conde
An investigation comparing ground-based techniques that quantify auroral electron flux and conductance
J. Geophys. Res. Space Physics, 2015
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G. W. Perry, H. Dahlgren, M. J. Nicolls, M. Zettergren, J.-P. St.-Maurice, J. L. Semeter, T. Sundberg, K. Hosokawa, K. Shiokawa, and S. Chen
Spatiotemporally resolved electrodynamic properties of a Sun-aligned arc over Resolute Bay
J. Geophys. Res., 2015
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D. A. Hickey, C. R. Martinis, F. S. Rodrigues, R. H. Varney, M. A. Milla, M. J. Nicolls, A. Strømme, and J. F. Arratia
Concurrent observations at the magnetic equator of small-scale irregularities and large-scale depletions associated with equatorial spread F
J. Geophys. Res., 2015
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R. A. Makarevich, L. J. Lamarche, and M. J. Nicolls
Resolute Bay Incoherent Scatter Radar observations of plasma structures in the vicinity of polar holes
J. Geophys. Res., 2015
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F. S. Rodrigues., M. J. Nicolls, M. A. Milla, J. M. Smith, R. H. Varney, A. Strømme, C. Martinis, and J. F. Arratia
AMISR-14: Observations of equatorial spread F
Geophys. Res. Lett., 2015
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K. A. Lynch, D. L. Hampton, M. Zettergren, T. A. Bekkeng, M. Conde, P. A. Fernandes, P. Horak, M. Lessard, R. Miceli, R. Michell, J. Moen, M. Nicolls, S. P. Powell, and M. Samara
MICA sounding rocket observations of conductivity-gradient-generated auroral ionospheric responses: Small-scale structure with large-scale drivers
J. Geophys. Res. Space Physics, 2015
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L. R. Lyons, Y. Nishimura, B. Gallardo-Lacourt, M. J. Nicolls, S. Chen, D. L. Hampton, W. A. Bristow, J. M. Ruohoniemi, N. Nishitani, E. F. Donovan, and V. Angelopoulos
Azimuthal flow bursts in the Inner Plasma Sheet and Possible Connection with SAPS and Plasma Sheet Earthward Flow Bursts
J. Geophys. Res., 2015
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H. Akbari, J. L. Semeter, M. A. Hirsch, P. Guio, and M. J. Nicolls
Evidence for generation of unstable suprathermal electron population in the auroral F-region
Geophys. Res. Lett., 2015
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L. R. Liuzzo, A. J. Ridley, N. J. Perlongo, E. J. Mitchell, M. Conde, D. L. Hampton, W. A. Bristow, and M. J. Nicolls
High-latitude ionospheric drivers and their effects on wind patterns in the thermosphere
J. Geophys. Res., 2015
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D. Janches, N. Swarnalingam, J. Plane, D. Nesvorny, W. Feng, D. Vokrouhlicky, and M. Nicolls
Radar detectability studies of slow and small Zodiacal Dust Cloud Particles: II. A study of three radars with dierent sensitivity
The Astrophysical Journal, 2014
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M. J. Nicolls, H. Bahcivan, I. Haggstrom, and M. Rietveld
Direct Measurement of Lower-Thermospheric Neutral Density using Multi-Frequency Incoherent Scattering
Geophys. Res. Lett., 2014
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M. J. Nicolls, R. Cosgrove, and H. Bahcivan
Estimating the vector electric field using monostatic, multibeam incoherent scatter radar measurements
Radio Sci., 2014
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H. Dahlgren, G. Perry, J.-P. St.-Maurice, T. Sundberg, K. Hosokawa, J. L. Semeter, M. J. Nicolls, and K. Shiokawa
3D imaging reveals electrodynamics of polar cap aurora
Astronomy & Geophysics, 2014
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P. G. Richards, M. J. Nicolls, J.-P. St.-Maurice, L. Goodwin, and J. M. Ruohoniemi
Investigation of sudden electron density depletions observed in the dusk sector by the Poker Flat, Alaska incoherent scatter radar in summer
J. Geophys. Res., 2014
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S. Zou, M. B. Moldwin, A. J. Ridley, M. J. Nicolls, A. J. Coster, E. G. Thomas, and J. M. Ruohoniemi
On the generation/decay of the storm-enhanced density plumes: Role of the convection flow and field-aligned ion flow
J. Geophys. Res., 2014
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S. R. Kaeppler, M. J. Nicolls, A. Strømme, C. A. Kletzing, and S. R. Bounds
Observations in the E-region ionosphere of kappa distribution functions associated with precipitating auroral electrons and discrete aurorae
J. Geophys. Res., 2014
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D. Themens, P. Jayachandran, M. J. Nicolls, and J. W. MacDougall
A Top to Bottom Evaluation of IRI-2007 within the Polar Cap
J. Geophys. Res., 2014
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Y. Nishimura, L. R. Lyons, M. J. Nicolls, D. L. Hampton, R. G. Michell, M. Samara, W. A. Bristow, E. F. Donovan, E. Spanswick, V. Angelopoulos, and S. B. Mende
Coordinated ionospheric observations indicating coupling between pre-onset flow bursts and waves that leads to substorm onset
J. Geophys. Res., 2014
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J. J. Sojka, R. W. Schunk, and M. J. Nicolls
Ionospheric Ion Temperature Forecasting in Multiples of 27 Days
Space Weather, 2014
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M. Zettergren, K. Lynch, D. Hampton, M. Nicolls, B. Wright, M. Conde, J. Moen, M. Lessard, R. Miceli, and S. Powell
Auroral ionospheric F region density cavity formation and evolution: MICA campaign results
J. Geophys. Res., 2014
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L. Goodwin, J.-P. St.-Maurice, P. Richards, M. Hairston, and M. Nicolls
F region dusk ion temperature spikes at the equatorward edge of the high latitude convection pattern
Geophys. Res. Lett., 2014
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R. H. Varney, S. C. Solomon, and M. J. Nicolls
Heating of the sunlit polar cap ionosphere by reflected photoelectrons
J. Geophys. Res., 2014
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K. Hosokawa, S. Taguchi, K. Shiokawa, Y. Otsuka, Y. Ogawa, and M. Nicolls
Global imaging of polar cap patches with dual airglow imagers
Geophys. Res. Lett., 2014
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H. Bahcivan, J. W. Cutler, J. C. Springmann, R. Doe, and M. J. Nicolls
Magnetic aspect sensitivity of high-latitude E region irregularities measured by the RAX CubeSat
J. Geophys. Res., 2014
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C. Anderson, M. J. Kosch, M. J. Nicolls, and M. Conde
Ion-neutral coupling in Earth's thermosphere, estimated from concurrent radar and optical observations over Alaska
J. Atmos. Solar-Terr. Phys., 2013
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R. A. Makarevich, A. V. Koustov, and M. J. Nicolls
Poker Flat Incoherent Scatter Radar observations of anomalous electron heating in the E-region
Ann. Geophys., 2013
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S. Zou, A. Ridley, M. Moldwin, M. Nicolls, A. Coster, and M. Ruohoniemi
Multi-instrument Observations of Storm Enhanced Density (SED) during Oct. 24-25 2011 Storm: Implications for SED Formation Processes
J. Geophys. Res., 2013
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R. A. Makarevich and M. J. Nicolls
Statistical comparison of TEC derived from GPS and ISR observations at high latitudes
Radio Sci., 2013
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H. Akbari, J. L. Semeter, M. J. Nicolls, M. Broughton, and J. W. LaBelle
On the localization of auroral Langmuir turbulence in thin layers
J. Geophys. Res., 2013
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S. Zou, M. B. Moldwin, M. J. Nicolls, A. J. Ridley, A. J. Coster, E. Yizengaw, L. R. Lyons, and E. F. Donovan
Electrodynamics of the high-latitude trough: its relationship with convection flows and field-aligned currents
J. Geophys. Res., 2013
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H. Bahcivan, M. J. Nicolls, and G. Perry
Comparison of SuperDARN irregularity drift measurements and F-region ion velocities from the Resolute Bay ISR
J. Atmos. Solar-Terr. Phys., 2013
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J. T. Fentzke, V. Hsu, C. G. M. Brum, I. Strelnikova, M. Rapp, and M. Nicolls
D region meteoric smoke and neutral temperature retrieval using the poker flat incoherent scatter radar
Geophys. Res. Lett., 2012
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D. Hysell, R. Miceli, J. Munk, D. Hampton, C. Heinselman, M. Nicolls, S. Powell, K. Lynch, and M. Lessard
Comparing VHF coherent scatter from the radar aurora with incoherent scatter and all-sky auroral imagery
J. Geophys. Res., 2012
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D. R. Themens, P. T. Jayachandran, R. B. Langley, J. W. Macdougall, and M. J. Nicolls
Determining receiver biases in GPS-derived total electron content in the auroral oval and polar cap region using ionosonde measurements
GPS Solutions, 2012
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H. Bahcivan, J. W. Cutler, M. Bennett, B. Kempke, J. C. Springmann, J. Buonocore, M. Nicolls, and R. Doe
First measurements of radar coherent scatter by the Radio Aurora Explorer CubeSat
Geophys. Res. Lett., 2012
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H. Dahlgren, G. W. Perry, J. L. Semeter, J.-P. St.-Maurice, K. Hosokawa, M. J. Nicolls, M. Greffen, K. Shiokawa, and C. Heinselman
Space-time variability of polar cap patches: Direct evidence for internal plasma structuring
J. Geophys. Res., 2012
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H. Dahlgren, J. L. Semeter, K. Hosokawa, M. J. Nicolls, T. W. Butler, M. G. Johnsen, K. Shiokawa, and C. Heinselman
Direct three-dimensional imaging of polar ionospheric structures with the Resolute Bay Incoherent Scatter Radar
Geophys. Res. Lett., 2012
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S. L. Vadas and M. J. Nicolls
The phases and amplitudes of gravity waves propagating and dissipating in the thermosphere: Theory
J. Geophys. Res., 2012
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M. J. Nicolls, S. L. Vadas, J. W. Meriwether, M. G. Conde, and D. Hampton
The phases and amplitudes of gravity waves propagating and dissipating in the thermosphere: Application to measurements over Alaska
J. Geophys. Res., 2012
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M. J. Nicolls, D. C. Fritts, D. Janches, and C. J. Heinselman
Momentum flux determination using the multi-beam Poker Flat Incoherent Scatter Radar
Ann. Geophys., 2012
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J. K. Burchill, J. H. Clemmons, D. J. Knudsen, M. Larsen, M. J. Nicolls, R. F. Pfaff, D. Rowland, and L. Sangalli
High-latitude E region ionosphere-thermosphere coupling: A comparative study using in situ and incoherent scatter radar observations
J. Geophys. Res., 2012
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H. Akbari, J. L. Semeter, H. Dahlgren, M. Diaz, M. Zettergren, A. Strømme, M. J. Nicolls, and C. Heinselman
Anomalous ISR echoes preceding auroral breakup: Evidence for strong Langmuir turbulence
Geophys. Res. Lett., 2012
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J. Liang, E. Spanswick, M. J. Nicolls, E. F. Donovan, D. Lummerzheim, and W. W. Liu
Multi-instrument observations of soft electron precipitation and its association with magnetospheric flows
J. Geophys. Res., 2011
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J. J. Sojka, M. Nicolls, A. van Eyken, C. Heinselman, and D. Bilitza
24/7 Solar minimum polar cap and auroral ion temperature observations
Advances in Space Research, 2011
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S. Zou, M. B. Moldwin, A. Coster, L. R. Lyons, and M. J. Nicolls
GPS TEC observations of dynamics of the mid-latitude trough during substorms
Geophys. Res. Lett., 2011
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R. H. Varney, M. C. Kelley, M. J. Nicolls, C. J. Heinselman, and R. L. Collins
The electron density dependence of polar mesospheric summer echoes
J Atmos Sol-Terr Phy, 2011
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M. R. Mella, K. A. Lynch, D. L. Hampton, H. Dahlgren, P. M. Kintner, M. Lessard, D. Lummerzheim, E. T. Lundberg, M. J. Nicolls, and H. C. Stenbaek-Nielsen
Sounding rocket study of two sequential auroral poleward boundary intensifications
J. Geophys. Res., 2011
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L. R. Lyons, Y. Nishimura, H.-J. Kim, E. Donovan, V. Angelopoulos, G. Sofko, M. Nicolls, C. Heinselman, J. M. Ruohoniemi, and N. Nishitani
Possible connection of polar cap flows to pre- and post-substorm onset PBIs and streamers
J. Geophys. Res., 2011
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M. C. Kelley, M. J. Nicolls, R. H. Varney, R. L. Collins, R. Doe, J. M. C. Plane, J. Thayer, M. Taylor, B. Thurairajah, and K. Mizutani
Radar, lidar, and optical observations in the polar summer mesosphere shortly after a space shuttle launch
J. Geophys. Res., 2010
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L. R. Lyons, Y. Nishimura, Y. Shi, S. Zou, H.-J. Kim, V. Angelopoulos, C. Heinselman, M. J. Nicolls, and K.-H. Fornacon
Substorm triggering by new plasma intrusion: Incoherent-scatter radar observations
J. Geophys. Res., 2010
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J. Semeter, T. W. Butler, M. Zettergren, C. J. Heinselman, and M. J. Nicolls
Composite imaging of auroral forms and convective flows during a substorm cycle
J. Geophys. Res., 2010
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R. Cosgrove, M. Nicolls, H. Dahlgren, S. Ranjan, E. Sanchez, and R. Doe
Radar detection of a localized 1.4 Hz pulsation in auroral plasma, simultaneous with pulsating optical emissions, during a substorm
Ann Geophys, 2010
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M. J. Nicolls, R. H. Varney, S. L. Vadas, P. A. Stamus, C. J. Heinselman, R. B. Cosgrove, and M. C. Kelley
Influence of an inertia-gravity wave on mesospheric dynamics: A case study with the Poker Flat Incoherent Scatter Radar
J. Geophys. Res., 2010
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J. J. Sparks, D. Janches, M. J. Nicolls, and C. Heinselman
Determination of physical and radiant meteor properties using PFISR interferometry measurements of head echoes
J Atmos Sol-Terr Phy, 2010
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T. W. Butler, J. Semeter, C. J. Heinselman, and M. J. Nicolls
Imaging F region drifts using monostatic phased-array incoherent scatter radar
Radio Sci., 2010
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Y. Nishimura, L. R. Lyons, S. Zou, X. Xing, V. Angelopoulos, S. B. Mende, J. W. Bonnell, D. Larson, U. Auster, T. Hori, N. Nishitani, K. Hosokawa, G. Sofko, M. Nicolls, and C. Heinselman
Preonset time sequence of auroral substorms: Coordinated observations by all-sky imagers, satellites, and radars
J. Geophys. Res., 2010
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M. G. Conde and M. J. Nicolls
Thermospheric temperatures above Poker Flat, Alaska, during the stratospheric warming event of January and February 2009
J. Geophys. Res., 2010
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S. Zou, M. B. Moldwin, L. R. Lyons, Y. Nishimura, M. Hirahara, T. Sakanoi, K. Asamura, M. J. Nicolls, Y. Miyashita, S. B. Mende, and C. J. Heinselman
Identification of substorm onset location and preonset sequence using Reimei, THEMIS GBO, PFISR, and Geotail
J. Geophys. Res., 2010
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H. Bahcivan, R. Tsunoda, M. J. Nicolls, and C. J. Heinselman
Initial ionospheric observations made by the new Resolute incoherent scatter radar and comparison to solar wind IMF
Geophys. Res. Lett., 2010
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S. Zou, L. R. Lyons, M. J. Nicolls, C. J. Heinselman, and S. B. Mende
Nightside ionospheric electrodynamics associated with substorms: PFISR and THEMIS ASI observations
J. Geophys. Res., 2009
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S. Zou, L. R. Lyons, M. J. Nicolls, and C. J. Heinselman
PFISR observations of strong azimuthal flow bursts in the ionosphere and their relation to nightside aurora
J. Atmos. Solar-Terr. Phys., 2009
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R. H. Varney, M. J. Nicolls, C. J. Heinselman, and M. C. Kelley
Observations of polar mesospheric summer echoes using PFISR during the summer of 2007
J. Atmos. Solar-Terr. Phys., 2009
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S. L. Vadas and M. J. Nicolls
Temporal evolution of neutral, thermospheric winds and plasma response using PFISR measurements of gravity waves
J. Atmos. Solar-Terr. Phys., 2009
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M. J. Taylor, Y. Zhao, P.-D. Pautet, M. J. Nicolls, R. L. Collins, J. Barker-Tvedtnes, C. D. Burton, B. Thurairajah, J. Reimuller, R. H. Varney, C. J. Heinselman, and K. Mizutani
Coordinated optical and radar image measurements of noctilucent clouds and polar mesospheric summer echoes
J. Atmos. Solar-Terr. Phys., 2009
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J. J. Sparks, D. Janches, M. J. Nicolls, and C. J. Heinselman
Seasonal and diurnal variability of the meteor flux at high latitudes observed using PFISR
J. Atmos. Solar-Terr. Phys., 2009
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J. J. Sojka, M. J. Nicolls, C. J. Heinselman, and J. D. Kelly
The PFISR IPY observations of ionospheric climate and weather
J. Atmos. Solar-Terr. Phys., 2009
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J. J. Sojka, R. L. McPherron, A. P. van Eyken, M. J. Nicolls, C. J. Heinselman, and J. D. Kelly
Observations of ionospheric heating during the passage of solar coronal hole fast streams
Geophys. Res. Lett., 2009
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J. Semeter, T. Butler, C. Heinselman, M. Nicolls, J. Kelly, and D. Hampton
Volumetric imaging of the auroral ionosphere: Initial results from PFISR
J. Atmos Solar-Terr. Phys., 2009
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P. G. Richards, M. J. Nicolls, C. J. Heinselman, J. J. Sojka, J. M. Holt, and R. R. Meier
Measured and modeled ionospheric densities, temperatures, and winds during the international polar year
J. Geophys. Res., 2009
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M. J. Nicolls, M. C. Kelley, R. H. Varney, and C. J. Heinselman
Spectral observations of polar mesospheric summer echoes at 33 cm (450 MHz) with the Poker Flat Incoherent Scatter Radar
J. Atmos Solar-Terr. Phys., 2009
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L. R. Lyons, S. Zou, C. J. Heinselman, M. J. Nicolls, and P. C. Anderson
Poker flat radar observations of the magnetosphere-ionosphere coupling electrodynamics of the earthward penetrating plasma sheet following convection enhancements
J. Atmos Solar-Terr. Phys., 2009
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L. R. Lyons, H.-J. Kim, X. Xing, S. Zou, D.-Y. Lee, C. Heinselman, M. J. Nicolls, V. Angelopoulos, D. Larson, J. McFadden, A. Runov, and K.-H. Fornacon
Evidence that solar wind fluctuations substantially affect global convection and substorm occurrence
J. Geophys. Res., 2009
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D. Janches, D. C. Fritts, M. J. Nicolls, and C. J. Heinselman
Observations of D-region structure and atmospheric tides with PFISR during active aurora
J. Atmos Solar-Terr. Phys., 2009
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D. L. Hysell, G. Michhue, M. J. Nicolls, C. J. Heinselman, and M. F. Larsen
Assessing auroral electric field variance with coherent and incoherent scatter radar
J. Atmos Solar-Terr. Phys., 2009
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J. L. Chau, F. R. Galindo, C. J. Heinselman, and M. J. Nicolls
Meteor-head echo observations using an antenna compression approach with the 450 MHz Poker Flat Incoherent Scatter Radar
J. Atmos Solar-Terr. Phys., 2009
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S. L. Vadas and M. J. Nicolls
Using PFISR measurements and gravity wave dissipative theory to determine the neutral, background thermospheric winds
Geophys. Res. Lett., 2008
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D. L. Hysell, G. Michhue, M. F. Larsen, R. Pfaff, M. Nicolls, C. Heinselman, and H. Bahcivan
Imaging radar observations of Farley Buneman waves during the JOULE II experiment
Ann. Geophys., 2008
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C. J. Heinselman and M. J. Nicolls
A Bayesian approach to electric field and E-region neutral wind estimation with the Poker Flat Advanced Modular Incoherent Scatter Radar
Radio Sci., 2008
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M. J. Nicolls and C. J. Heinselman
Three-dimensional measurements of traveling ionospheric disturbances with the Poker Flat Incoherent Scatter Radar
Geophys. Res. Lett., 2007
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M. J. Nicolls, C. J. Heinselman, E. A. Hope, S. Ranjan, M. C. Kelley, and J. D. Kelly
Imaging of Polar Mesosphere Summer Echoes with the 450 MHz Poker Flat Advanced Modular Incoherent Scatter Radar
Geophys. Res. Lett., 2007
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