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AGU: Geophysical Research Letters

 

Keywords

  • convective ionospheric storms
  • space weather
  • assimilative modeling

Index Terms

  • Ionosphere: Equatorial ionosphere
  • Ionosphere: Ionospheric disturbances
  • Ionosphere: Ionospheric irregularities
  • Ionosphere: Modeling and forecasting

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 36, L00C07, 5 PP., 2009
doi:10.1029/2009GL039378

C/NOFS and radar observations during a convective ionospheric storm event over South America

M. C. Kelley

School of Electrical and Computer Engineering, Cornell University, Ithaca, New York, USA

F. S. Rodrigues

Atmospheric and Space Technology Research Associates, San Antonio, Texas, USA

J. J. Makela

Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA

R. Tsunoda

Geospace Division, SRI International, Menlo Park, California, USA

P. A. Roddy

Air Force Research Laboratory, RVBXT, Hanscom Air Force Base, Massachusetts, USA

D. E. Hunton

Air Force Research Laboratory, RVBXT, Hanscom Air Force Base, Massachusetts, USA

J. M. Retterer

Air Force Research Laboratory, RVBXT, Hanscom Air Force Base, Massachusetts, USA

O. de La Beaujardiere

Air Force Research Laboratory, RVBXT, Hanscom Air Force Base, Massachusetts, USA

E. R. de Paula

Instituto Nacional de Pesquisas Espaciais, Sao Jose dos Campos, Brazil

R. R. Ilma

School of Electrical and Computer Engineering, Cornell University, Ithaca, New York, USA

The development of a convective ionospheric storm is studied using three radars, the C/NOFS satellite, airglow instrumentation, and a numerical model. First detected in the form of convective plumes over the Eastern Pacific, plasma irregularities, airglow signatures, plumes, and irregularities were also detected over Brazil and then Peru. Dynamo conditions were such that a modest prereversal enhancement was recorded at both Christmas Island and Peru and probably over Brazil as well. No prereversal enhancement occurred during the next two days and no plumes were detected. The numerical model reproduced the results quite well over Peru. Evidence for seeding by both gravity waves and the Kelvin-Helmholtz instability is presented.

Received 1 June 2009; accepted 25 June 2009; published 21 August 2009.

Citation: Kelley, M. C., F. S. Rodrigues, J. J. Makela, R. Tsunoda, P. A. Roddy, D. E. Hunton, J. M. Retterer, O. de La Beaujardiere, E. R. de Paula, and R. R. Ilma (2009), C/NOFS and radar observations during a convective ionospheric storm event over South America, Geophys. Res. Lett., 36, L00C07, doi:10.1029/2009GL039378.

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