Height-integrated Pedersen and Hall conductivity patterns inferred from the TIROS-NOAA satellite data

The series of polar-orbiting National Oceanic and Atmospheric Administration spacecraft TIROS, NOAA 6, and NOAA 7 have been monitoring the particle influx into the atmosphere since late 1978. This data base has been used to construct statistical global patterns of height-integrated Pedersen and Hall conductivities for a discrete set of auroral activity ranges. The observations of energy influx and “characteristic electron energy” have been binned in a 1° latitude and 2° magnetic local time grid and ordered by an auroral activity index. This index is an estimate of the energy deposited into a single hemisphere by incident particles, a parameter generated directly from the particle observations and, therefore, internally consistent with the statistical patterns that are constructed. An average electron spectrum is associated with each characteristic energy, which enables a height profile of ionization rate in the upper atmosphere to be determined. The use of a pressure coordinate system insures that the normalized ionization rate profiles are independent of atmospheric model parameters. To create the statistical pattern of height-integrated conductivities, however, vertical profiles of atmospheric temperature and composition are assumed, and the ion density enhancements are evaluated from a chemical balance between ion production and recombination based on an “effective” recombination coefficient. The data base can also provide the statistical pattern of particle heating rates and ionization rates over a three-dimensional grid suitable as input to more sophisticated ionospheric and neutral thermospheric codes.

[1]  T. Fuller‐Rowell,et al.  The consequences of high latitude particle precipitation on global thermospheric dynamics , 1982 .

[2]  P. Hays,et al.  Auroral heating and the composition of the neutral atmosphere , 1973 .

[3]  M. Rees,et al.  Auroral ionization and excitation by incident energetic electrons , 1963 .

[4]  R. Spiro,et al.  Precipitating electron energy flux and auroral zone conductances - An empirical model , 1982 .

[5]  J. Winningham,et al.  The latitudinal morphology of 10‐eV to 10‐keV electron fluxes during magnetically quiet and disturbed times in the 2100–0300 MLT sector , 1975 .

[6]  J. Foster.  An empirical electric field model derived from Chatanika radar data , 1983 .

[7]  R. Dickinson,et al.  Global circulation and temperature structure of thermosphere with high‐latitude plasma convection , 1982 .

[8]  R. G. Musgrove,et al.  Ionospheric convection associated with discrete levels of particle precipitation , 1986 .

[9]  Arthur D. Richmond,et al.  Estimation of ionospheric electric fields, ionospheric currents, and field‐aligned currents from ground magnetic records , 1981 .

[10]  R. Schunk,et al.  A theoretical study of the high-latitude winter f region at solar minimum for low magnetic activity , 1981 .

[11]  T. Killeen,et al.  The composition, structure, temperature and dynamics of the upper thermosphere in the polar regions during October to December 1981 , 1985 .

[12]  R. Vondrak,et al.  Radar measurements of the latitudinal variation of auroral ionization , 1976 .

[13]  G. W. Prölss.  Latitudinal structure and extension of the polar atmospheric disturbance , 1981 .

[14]  S. Quegan,et al.  The effect of realistic conductivities on the high-latitude neutral thermospheric circulation , 1984 .

[15]  R. Robinson,et al.  Measurements of E region ionization and conductivity produced by solar illumination at high latitudes , 1984 .

[16]  D. Wallis,et al.  Empirical models of height integrated conductivities , 1981 .

[17]  E. Bering,et al.  Simultaneous rocket and radar measurements of currents in an auroral arc , 1981 .

[18]  S. Quegan,et al.  A theoretical study of the distribution of ionization in the high-latitude ionosphere and the plasmasphere - First results on the mid-latitude trough and the light-ion trough , 1982 .

[19]  R. W. Spiro,et al.  Quantitative simulation of a magnetospheric substorm 1. Model logic and overview , 1981 .

[20]  Y. Kamide,et al.  Ionospheric conductivity dependence of electric fields and currents estimated from ground magnetic observations , 1982 .

[21]  S. Matthews,et al.  Energy deposition by precipitating particles and Joule dissipation in the auroral ionosphere , 1982 .

[22]  M. Rees,et al.  Time dependent studies of the aurora—I. Ion density and composition , 1973 .

[23]  A. Egeland,et al.  Auroral vector electric field and particle comparisons, 2, Electrodynamics of an arc , 1977 .

[24]  A. E. Grün,et al.  Lumineszenz-photometrische Messungen der Energieabsorption im Strahlungsfeld von Elektronenquellen Eindimensionaler Fall in Luft , 1957 .

[25]  K. Stamnes,et al.  Neutral and ion gas heating by auroral electron precipitation , 1983 .

[26]  R. Wolf,et al.  Inferring electric fields and currents from ground magnetometer data - A test with theoretically derived inputs , 1983 .

[27]  S. Matthews,et al.  The diurnal and latitudinal variation of auroral zone ionospheric conductivity , 1981 .

[28]  T. Fuller‐Rowell,et al.  A Three-Dimensional Time-Dependent Global Model of the Thermosphere , 1980 .

[29]  M. S. Gussenhoven,et al.  A statistical model of auroral electron precipitation , 1985 .

[30]  E. E. Budzinski,et al.  Average characteristics of magnetospheric electrons (150 eV to 200 keV) at 1400 km , 1975 .

[31]  J. A. Whalen,et al.  A quantitative description of the spatial distribution and dynamics of the energy flux in the continuous aurora , 1983 .

[32]  N. Maynard,et al.  Empirical high‐latitude electric field models , 1987 .

[33]  R. Hoffman,et al.  Auroral arc electrodynamic parameters measured by AE‐C and the Chatanika Radar , 1981 .