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Title: Comparison of measured and modeled solar EUV flux and its effect on the E-F1 region ionosphere

Abstract

The response of the E-F1 region ionosphere to different solar EUV flux models is investigated theoretically using two different photochemical schemes, and the results are compared with incoherent scatter radar electron density measurements taken at Millstone Hill. The latest EUV flux model (Tobiska, 1991), which incorporates more recent measurements, has generally more flux at short wavelengths compared to the Hinteregger et al. (1981) flux model based on AE-E satellite data. This results in better agreement with the measurements in the E-F1 region and above. The Tobiska flux model, however, gives a smaller E{prime} region peak density, due to the influence of low Lyman {beta} flux in the November 10, 1988, rocket measurements of Woods and Rottman (1990). The photochemical scheme of Buonsanto (1990) has been improved and now gives results similar to the more comprehensive scheme of (Solomon et al., 1988; Solomon and Abreu, 1989; S.C. Solomon and R.G. Roble, Simulation of the global thermospheric airglow, 1, Methodology, submitted to Journal of Geophysical Research, 1992), provided that the ratios of photoelectron impact ionization to photoionization (pe/pi) given by this latter model are included. The pe/pi ratios calculated by this model and by the models of Lilensten et al. (1989) andmore » Richards and Torr (1988) differ significantly, and work is needed to resolve these differences.« less

Authors:
 [1];  [2];  [3]
  1. (Massachusetts Inst. of Tech., Westford (United States))
  2. (Univ. of Colorado, Boulder (United States))
  3. (Univ. of California, Berkeley (United States))
Publication Date:
OSTI Identifier:
7262131
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Geophysical Research; (United States); Journal Volume: 97:A7
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; E REGION; ELECTRON DENSITY; PHOTOCHEMISTRY; F1 LAYER; COMPARATIVE EVALUATIONS; ELECTRON COLLISIONS; EXTREME ULTRAVIOLET RADIATION; LYMAN LINES; MATHEMATICAL MODELS; PHOTOIONIZATION; RESPONSE FUNCTIONS; SATELLITES; SOLAR FLUX; CHEMISTRY; COLLISIONS; EARTH ATMOSPHERE; ELECTROMAGNETIC RADIATION; EVALUATION; F REGION; FUNCTIONS; IONIZATION; IONOSPHERE; PLANETARY IONOSPHERES; RADIATIONS; ULTRAVIOLET RADIATION; 661320* - Auroral, Ionospheric, & Magnetospheric Phenomena- (1992-)

Citation Formats

Buonsanto, M.J., Solomon, S.C., and Tobiska, W.K. Comparison of measured and modeled solar EUV flux and its effect on the E-F1 region ionosphere. United States: N. p., 1992. Web. doi:10.1029/92JA00792.
Buonsanto, M.J., Solomon, S.C., & Tobiska, W.K. Comparison of measured and modeled solar EUV flux and its effect on the E-F1 region ionosphere. United States. doi:10.1029/92JA00792.
Buonsanto, M.J., Solomon, S.C., and Tobiska, W.K. Wed . "Comparison of measured and modeled solar EUV flux and its effect on the E-F1 region ionosphere". United States. doi:10.1029/92JA00792.
@article{osti_7262131,
title = {Comparison of measured and modeled solar EUV flux and its effect on the E-F1 region ionosphere},
author = {Buonsanto, M.J. and Solomon, S.C. and Tobiska, W.K.},
abstractNote = {The response of the E-F1 region ionosphere to different solar EUV flux models is investigated theoretically using two different photochemical schemes, and the results are compared with incoherent scatter radar electron density measurements taken at Millstone Hill. The latest EUV flux model (Tobiska, 1991), which incorporates more recent measurements, has generally more flux at short wavelengths compared to the Hinteregger et al. (1981) flux model based on AE-E satellite data. This results in better agreement with the measurements in the E-F1 region and above. The Tobiska flux model, however, gives a smaller E{prime} region peak density, due to the influence of low Lyman {beta} flux in the November 10, 1988, rocket measurements of Woods and Rottman (1990). The photochemical scheme of Buonsanto (1990) has been improved and now gives results similar to the more comprehensive scheme of (Solomon et al., 1988; Solomon and Abreu, 1989; S.C. Solomon and R.G. Roble, Simulation of the global thermospheric airglow, 1, Methodology, submitted to Journal of Geophysical Research, 1992), provided that the ratios of photoelectron impact ionization to photoionization (pe/pi) given by this latter model are included. The pe/pi ratios calculated by this model and by the models of Lilensten et al. (1989) and Richards and Torr (1988) differ significantly, and work is needed to resolve these differences.},
doi = {10.1029/92JA00792},
journal = {Journal of Geophysical Research; (United States)},
number = ,
volume = 97:A7,
place = {United States},
year = {Wed Jul 01 00:00:00 EDT 1992},
month = {Wed Jul 01 00:00:00 EDT 1992}
}