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Continuous Pulsation Dynamics in the High-Latitude Magnetosphere-Ionosphere System

By Stuart Carlos Gane

Abstract

The thesis investigates Ultra Low Frequency waves in the band 0.1 Hz to 5 Hz in the terrestrial magnetosphere-ionosphere system. Utilising mid-high latitude ground-based induction coil magnetometers, continuous (Pc1-2) and irregular (Pi1-c) pulsations are explored through the application of digital spectral analysis.\ud An assessment of two spectral analysis techniques is conducted. From which it is concluded that, for routine ground-based analysis of Pc1-2 pulsations, treating the horizontal components of magnetic field variation as a single complex signal is computationally beneficial with minimal loss of useful information. Polarisation parameters and values of cross spectral phase are derived using a weighted histogram technique and are subsequently used to distinguish discrete pulsations and infer their location through simple triangulation.\ud The results of a statistical study of ~1200 discrete Pc1-2 events over the full year of 2007, during the declining phase of solar cycle 23, are presented. This study, for the first time, reports the ground-based polarisation properties of Pc1-2 waves as a function of latitude. The derived diurnal frequency behaviour supports the suggestion that the Ionospheric Alfvén Resonator may play a part in the filtration of ground-based Pc1 observations. Pc1-2 behaviour over the course of 26 geomagnetic storms is also presented, with support being found for the association of pulsation enhancement with plasmaspheric plume formation in the recovery phase.\ud A case study, combining coherent and incoherent radar, in situ particle measurements and ground based magnetometry, has focused on high latitude Pi-c activity during a period of enhanced dayside reconnection. This study has provided support for the association of Electromagnetic Ion cyclotron waves with the SuperDARN spectral width enhancements observed in the flanks of the ionospheric cusp

Publisher: University of Leicester
Year: 2011
OAI identifier: oai:lra.le.ac.uk:2381/9695

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Citations

  1. (1976). A comparative study of three techniques for using the spectral matrix in wave analysis,
  2. (2007). A decade of the Super Dual Auroral Radar Network (SuperDARN): scientific achievements, new techniques and future directions,
  3. A dynamical theory of the electromagnetic field,
  4. (2000). A mechanism of anticorrelation in the occurrence of ULF electromagnetic noise resonance structure and Pc 1 magnetic pulsations through the solar activity cycle,
  5. A modulated multiband Pc1 event observed by POLAR/EFI around the plasmapause,
  6. (1997). A new functional form to study the solar wind control of the magnetopause size and shape,
  7. (1978). A new radar auroral backscatter experiment in northern Scandinavia,
  8. (1967). A nomenclature for oblique ionospheric soundings and ray tracing,
  9. (2004). A possible origin of dayside Pc1 magnetic pulsations observed at high latitudes,
  10. (1972). A rotary-component method for analysing meteorological and oceanographic vector time series,
  11. (1976). A statistical study of Pc 1 magnetic pulsations at synchronous orbit,
  12. (1992). A Statistical Study of Pc 1-2 Magnetic Pulsations in the Equatorial Magnetosphere: 2. Wave Properties,
  13. (2002). A statistical study of the Doppler spectral width of high-latitude ionospheric F-region echoes recorded with SuperDARN coherent HF radars,
  14. (1997). A statistical study of the local time asymmetry of Pc 5 ULF wave characteristics observed at midlatitudes by SAMNET,
  15. (2000). A statistical survey of dayside pulsed ionospheric flows as seen by the CUTLASS Finland HF radar,
  16. (1967). A systematic study of structured micropulsations,
  17. (2003). A technique for accurately determining the cusp-region polar cap boundary using SuperDARN HF radar measurements,
  18. (2005). A.D.M., Magnetohydrodynamic waves in geospace,
  19. (1984). Achievements of the Intern.
  20. (1965). An algorithm for the machine calculation of complex Fourier series.
  21. (2007). An automatic wave detection algorithm applied to Pc1 pulsations,
  22. (1975). An empirical relationship between interplanetary conditions and Dst,
  23. (1990). An estimate of the maximum speed of the solar wind, 1938-1989,
  24. (1980). An experimental test of the electromagnetic ion cyclotron instability within the earth’s magnetosphere.
  25. (1970). Aspect sensitivity of F-layer HF backscatter echoes.
  26. (1966). Auroral electrojet activity index AE and its universal time variations,
  27. (1997). Characteristics of high-speed ion flows in the plasma sheet,
  28. Characteristics of low latitude Pc1 pulsations during geomagnetic storms,
  29. (1977). Chevron frequency structure in Pc 1 geomagnetic pulsations,
  30. (2004). Cluster observations of magnetic field fluctuations in the high-altitude cusp,
  31. (1996). CRRES Poynting vector observations of electromagnetic ion cyclotron waves near the plasmapause,
  32. (1965). Cyclotron instabilities and electromagnetic emission in the ultra low frequency and very low frequency ranges,
  33. (1007). DARN/SuperDARN A global view of the dynamics of high-latitude convection,
  34. (1991). Dependence of convective flows and particle precipitation in the high-latitude dayside ionosphere on the X and Y components of the interplanetary magnetic field,
  35. (2005). Dependencies of high-latitude plasma convection: Consideration of interplanetary magnetic field, seasonal, and universal time factors in statistical patterns,
  36. (2007). Discovery of the pearl waves by Eyvind Sucksdorff,
  37. (1988). Duct propagation of hydromagnetic waves in the upper ionosphere, 1, Electromagnetic field disturbances in high latitudes associated with localized incidence of a shear Alfven wave,
  38. (1958). Dynamics of the Interplanetary Gas and Magnetic Fields,
  39. (1998). Edge detection techniques-an overview,
  40. (2003). Edge detection: A tutorial review, Acoustics, Speech, and Signal
  41. Effect of magnetic storm intensity on Pc1 activity at high and mid-latitudes,
  42. (1981). Effects of drift on the transport of cosmic rays. IVModulation by a wavy interplanetary current sheet.
  43. (1981). Effects of Magnetospheric Compression and Expansion on Spectral Structure of ULF Emissions.
  44. (2001). Electromagnetic ion cyclotron waves in the high altitude cusp: Polar observations,
  45. (1993). Electromagnetic ion cyclotron waves stimulated by modest magnetospheric compressions,
  46. (1991). Electromagnetic ion/ion instabilities and their consequences in space plasmas-A review,
  47. (1987). Empirical high-latitude electric field models,
  48. (2003). Empirical plasmapause models from magnetic indices,
  49. (2003). Energetic particle counterparts for geomagnetic pulsations of
  50. (1979). Energy coupling function and solar wind-magnetosphere dynamo,
  51. (1994). Energy transfer between energetic ring current H and O by electromagnetic ion cyclotron waves,
  52. (1964). Enhancement of Hydromagnetic Emissions after Geomagnetic Storms,
  53. (2000). ESR and EISCAT observations of the response of the cusp and cleft to IMF orientation changes,
  54. (1995). Events of enhanced convection and 233References related dayside auroral activity,
  55. (1968). Explorer 12 observations of the magnetopause current layer,
  56. (1991). Extension of the MSIS thermosphere model into the middle and lower atmosphere,
  57. (2000). Field-aligned currents in geospace: substance and significance, Magnetospheric current systems,
  58. (2001). First simultaneous observations of flux transfer events at the high-latitude magnetopause by the Cluster spacecraft and pulsed radar signatures in the conjugate ionosphere by the CUTLASS and EISCAT radars,
  59. (2004). Four-point discontinuity observations using Cluster magnetic field data: A statistical survey,
  60. (2001). Fraser-Smith, A.C., Some statistics on Pc1 geomagnetic micropulsation occurrence at middle latitudes: Inverse relation with sunspot cycle and semiannual period,
  61. (1971). Gas-magnetic field interactions in the solar corona.
  62. Generation of ion cyclotron waves and heating of He+
  63. (2007). Generation of Pc 1 pulsations in the regime of backward wave oscillator,
  64. (1967). Geomagnetic micropulsations and diagnostics of the magnetosphere,
  65. (1969). Geomagnetic pulsations,
  66. (1992). Geotail mission to explore earth's magnetotail,
  67. (1997). Ground observations and possible source regions of two types of Pc 1-2 micropulsations at very high latitudes,
  68. (2002). Ground-based observations of the auroral zone and polar cap ionospheric responses to dayside transient reconnection,
  69. (1995). HF radar signatures of the cusp and low-latitude boundary layer,
  70. (2004). High resolution observations of spectral width features associated with ULF wave signatures in artificial HF radar backscatter,
  71. (1991). High-latitude day-time Pc1-2 continuous magnetic pulsations: A ground signature of the polar cusp and cleft projection,
  72. (2006). High-resolution global storm index: Dst versus SYMH,
  73. (1989). High-Z energetic particles at geosynchronous orbit during the great solar proton event series of October
  74. (1964). Hourly values of equatorial Dst for the IGY,
  75. (1957). Hourly values of equatorial Dst for years
  76. (1962). Hydromagnetic Emissions, X-Ray Bursts, and Electron Bunches 1. Experimental Results,
  77. (1959). Hydromagnetic theory of geomagnetic storms,
  78. (2007). Hydromagnetic Waves in the Magnetosphere and the Ionosphere, Springer Verlag ,
  79. (1965). Hydromagnetic whistlers,
  80. (1997). Initial backscatter occurrence statistics from the CUTLASS HF radars,
  81. (1978). Initial ISEE magnetometer results: Magnetopause observations,
  82. (2008). International reference ionosphere 2007: Improvements and new parameters,
  83. (1961). Interplanetary Magnetic Field and the Auroral Zones.
  84. (2004). Interpretation of Cluster data on chorus emissions using the backward wave oscillator model,
  85. (1993). Interpretation of HF radar ionospheric Doppler spectra by collective wave scattering theory,
  86. (1995). Introduction to space physics. Cambridge Univ Pr,
  87. (2003). Ion cyclotron waves in the high altitude cusp: CLUSTER observations at varying spacecraft separations,
  88. (1954). Ionospheric absorption measurements during a sunspot cycle,
  89. (1997). Ionospheric Alfvén Resonator Control over the Frequency-Variable Pc1 Event in Finland on
  90. Ionospheric duct propagation and Pc 1 pulsation sources,
  91. (1980). Ionospheric irregularities,
  92. (1979). ISEE observations of flux transfer events at the dayside magnetopause,
  93. (1994). Large-scale convection patterns observed by DMSP,
  94. (1998). Large-scale imaging of high-latitude convection with Super Dual Auroral Radar Network HF radar observations,
  95. (1925). Local reflection of wireless waves from the upper atmosphere.
  96. (1975). Locating the Pc 1 generation region by a statistical analysis of ground based observations,
  97. (1964). Low-Latitude Observations of Fine-Structured Hydromagnetic Emissions,
  98. (1973). Magnetic pulsations within the magnetosphere- A review (Geomagnetic micropulsations within magnetosphere, investigating MHD waves and particle-wave interactions).
  99. (1998). Magnetopause location under extreme solar wind conditions,
  100. (1967). Magnetopause structure and attitude from
  101. (1995). Magnetosphere cyclotron maser: Backward wave oscillator generation regime,
  102. (1993). Magnetospheric plasma analyzer for spacecraft with constrained resources,
  103. (1997). Mapping the outer LLBL with SuperDARN double-peaked spectra,
  104. (1994). Merge: a FORTRAN program, Tech rep,
  105. (1965). Micropulsation mode” propagation in the magnetosphere,
  106. (1964). Micropulsation whistlers,
  107. (1966). micropulsations at spaced stations,
  108. (1972). Micropulsations from a finite source,
  109. (1998). Modulation of magnetospheric EMIC waves by Pc 3 pulsations of upstream origin,
  110. (2004). Monitoring the plasmapause using geomagnetic field line resonances,
  111. (1998). Morphology and physics of short-period magnetic pulsations,
  112. (1997). Multiple-timescales analysis of ideal poloidal Alfvén waves,
  113. (1999). New constraints on theories of Pc1 pearl formation,
  114. (1997). Nonbouncing Pc 1 wave bursts,
  115. (1996). O.: Comment on “A new interpretation of Weimer et al.’s solar wind propagation delay technique” by Bargatze et al.,
  116. (1985). Observations of a possible ground signature of flux transfer events,
  117. (1993). Observations of an enhanced convection channel in the cusp ionosphere,
  118. (1996). Observations of electromagnetic ion cyclotron waves during geomagnetic storms: Wave occurrence and pitch angle scattering,
  119. (1960). Observations of geomagnetic fluctuations in the period range 0.3 to 120 seconds.
  120. (1961). Observations of hydromagnetic emissions,
  121. (1985). Observations of ion cyclotron waves near synchronous orbit and on the ground,
  122. (2002). Observations of two types of Pc 1–2 pulsations in the outer dayside magnetosphere,
  123. (1932). Occurrence of rapid micropulsations at Sodankyla during
  124. (1902). On the elevation of the electrically-conducting strata of the earth's atmosphere,
  125. (1908). On the Probable Existence of a Magnetic Field in Sun-Spots,
  126. (2005). On the source of Pc1-2 waves in the plasma mantle,
  127. (1999). On the SuperDARN autocorrelation function observed in the ionospheric cusp,
  128. (2010). One min and 5-min solar wind data sets at the Earth's bow shock nose.
  129. (2004). Origin of the SuperDARN broad Doppler spectra: simultaneous observation with Oersted satellite magnetometer,
  130. (2006). Origin of the turbulent spectra in the high-altitude cusp: Cluster spacecraft observations,
  131. (1936). Oscillations and vibrations in magnetic records at high-latitude stations,
  132. (1991). Pc 1 micropulsations at a highlatitude station- A study over nearly four solar cycles,
  133. (2001). Pc 1 pearls revisited- Structured electromagnetic ion cyclotron waves on Polar satellite and on ground,
  134. (2000). Pc 1 waves and ionospheric Alfvén resonator: Generation or filtration?.
  135. (1983). Pc1 wave generation by sudden impulses,
  136. (2007). Pc1 waves in the system of solar-terrestrial relations:
  137. (2008). Pc1–Pc2 waves and energetic particle precipitation during and after magnetic storms: Superposed epoch analysis and case studies.
  138. (1965). Pearl-type micropulsations associated with magnetic storm sudden commencements,
  139. (1960). Period analysis of geomagnetic pulsations by a sona-graph method,
  140. (1967). Polarization characteristics of Pc 1 micropulsations at College,
  141. (1972). Polarization properties of Pc 1 micropulsations at low latitudes.
  142. (1984). Precipitating electron and ion detectors (SSJ/4) for the block 5D/flights 6-10 DMSP satellites: Calibration and data presentation,
  143. (1959). Principles of optics, Pergamon press
  144. (2005). Propagation of electromagnetic ion cyclotron wave energy in the magnetosphere,
  145. (1972). Propagation of Pc 1 hydromagnetic waves across
  146. (1972). Propagation of Pcl micropulsations in a proton-helium magnetosphere,
  147. (1994). Properties of structured and unstructured Pc1 pulsations at high latitudes: Variation over the 21st solar cycle,
  148. (2000). Proton precipitation related to Pcl pulsations,
  149. (1961). Pulsation of the earth's electromagnetic field with periods of 1 to 15 seconds and their connection with phenomena in the high atmosphere,
  150. (2001). Quasiperiodic modulation of the Pc1 geomagnetic pulsations: An unsettled problem,
  151. (1996). Recent observations of electromagnetic ion cyclotron waves in space,
  152. (1972). Relation of Pc 1 micropulsations to the ring current and geomagnetic storms,
  153. (1999). Response of the expanding/contracting polar cap to weak and strong solar wind driving: Implications for substorm onset,
  154. (2002). sawtooth event,
  155. (2009). Searching for ULF signatures of the cusp: Observations from search coil magnetometers and auroral imagers in Svalbard,
  156. (1996). Sensors: a comprehensive survey. Cumulative index.
  157. (1993). Simulations of ion cyclotron anisotropy instabilities in the terrestrial magnetosheath,
  158. (1996). Simultaneous ground-satellite observations of structured
  159. (2009). Simultaneous observations of flux transfer events by THEMIS, Cluster, Double Star and SuperDARN: Acceleration of FTEs,
  160. (2009). size, velocity and field-aligned currents of dayside plasma injections: a multi-altitude study,
  161. (2000). Small-scale vortices in the high-latitude F region,
  162. (2010). Small-scale, field-aligned currents at the top-side ionosphere.
  163. (1996). Solar cycle change of Pc 1 waves observed by an equatorial satellite and on the ground,
  164. (1999). Solar Cycle Variation
  165. (1988). Solar luminosity variations in solar cycle 21,
  166. (2005). Solar wind dependence of the Pc1 wave activity,
  167. (2006). Solar wind sources and their variations over the solar cycle,
  168. (2005). Solar wind spatial scales in and comparisons of hourly Wind and ACE plasma and magnetic field data,
  169. (2005). Some aspects of ELF-VLF emissions in geophysical research; PhD Thesis, Oulun yliopisto.
  170. (1981). Some windows with very good sidelobe behaviour, Acoustics, Speech and Signal Processing,
  171. (1985). Source regions of low-latitude Pcl pulsations and their relationship to the plasmapause,
  172. (1999). Statistical observations of the MLT, latitude and size of pulsed ionospheric flows with the CUTLASS Finland radar,
  173. (1996). Statistical patterns of high-latitude convection obtained from Goose Bay HF radar observations,
  174. (2009). Statistical relationship between solar wind conditions and geomagnetic storms in 1998-2008,
  175. (1970). Statistical study of micropulsation polarizations,
  176. Storm-time Pc 1 activity at high and middle latitudes,
  177. (2007). Subauroral proton spots visualize the Pc1 source,
  178. (1942). Summary and Further Work Appendix A. Vector Identities Alfven, H. Existence of electromagnetic-hydrodynamic waves,
  179. (2006). Temporal and spatial characteristics of Pc1 geomagnetic pulsations,
  180. (1973). The behaviour of ULF waves and particles in the magnetosphere,
  181. (1992). The contribution of ion-cyclotron waves to electron heating and SAR-arc excitation near the storm-time plasmapause,
  182. (1998). The Cosmic-Ray Isotope Spectrometer for the Advanced Composition Explorer, Space Sci.
  183. (1988). The cusp and the cleft/boundary layer: low-altitude identification and statistical local time variation,
  184. (1997). The EISCAT Svalbard radar: A case study in modern incoherent scatter radar system design,
  185. (1996). The energy spectrometer for particles (ESP): Instrument description and orbital performance.
  186. (1029). The frontside boundary layer of the magnetosphere and the problem of reconnection,
  187. (1994). The Geotail magnetic field experiment,
  188. (1970). The interaction of an internal tide with the frontal zone of a coastal upwelling region.
  189. (1997). The interplanetary causes of magnetic storms: A review,
  190. (1997). The ionospheric response to flux transfer events: the first few minutes,
  191. (1977). The low energy charged particle (LECP) experiment on the Voyager spacecraft,
  192. (1981). The orientation of the solar rotation axis from Doppler velocity observations,
  193. The possible statistical relation of Pc1 pulsations to Earthquake occurrence at low latitudes,
  194. (2005). The relationship between plasma density structure and EMIC waves at geosynchronous orbit,
  195. (2002). The role of Pc1-2 waves in spectral broadening of SuperDARN echoes from high latitudes,
  196. (1999). The terrestrial ring current: Origin, formation, and decay,
  197. (1902). The theory of electric telegraphy, Encyclopaedia Britannica,
  198. (1990). Theory of electromagnetic cyclotron wave growth in a time-varying magnetoplasma,
  199. (1968). Theory of hydromagnetic propagation in the ionospheric waveguide,
  200. (1999). Time series data analyses in space physics,
  201. (1979). ULF Goniometer techniques for locating Pc 1 geomagnetic pulsation sources,
  202. ULF/Lower ELF electromagnetic field measurements in the polar caps,
  203. (1972). Use of the three-dimensional covariance matrix in analyzing the polarization properties of plane waves,
  204. (1992). Viking magnetic and electric field observations of periodic Pc 1 waves- Pearl pulsations,
  205. (2003). violins, tree rings, and the Maunder Minimum: a hypothesis,
  206. (1964). Wave Generation Near the Outer Boundary of the Magnetosphere",
  207. (1966). Waveguide theory for ionospheric propagation of hydromagnetic emissions,
  208. (1992). Waves in plasmas.
  209. (1998). Westward moving dynamic substorm features observed with the IMAGE magnetometer network and other ground-based instruments,
  210. (1994). What is a geomagnetic storm?,
  211. (1998). WIND nominal mission performance and extended mission design,
  212. with a broad frequency spectrum—“Goose pulsations”,

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