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AGU: Geophysical Research Letters

 

Index Terms

  • Atmospheric Composition and Structure: Ion chemistry of the atmosphere
  • Ionosphere: Ionosphere/atmosphere interactions
  • Ionosphere: Ion chemistry and composition
  • Ionosphere: Ionospheric dynamics

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 30, 1009, 4 PP., 2003
doi:10.1029/2002GL015927

First simultaneous observations of Ca+, K, and electron density using lidar and incoherent scatter radar at Arecibo

Craig A. Tepley

Arecibo Observatory, Cornell University, Arecibo, Puerto Rico, USA

Shikha Raizada

Arecibo Observatory, Cornell University, Arecibo, Puerto Rico, USA

Qihou Zhou

Arecibo Observatory, Cornell University, Arecibo, Puerto Rico, USA

Jonathan S. Friedman

Arecibo Observatory, Cornell University, Arecibo, Puerto Rico, USA

We report the first measurements of Ca+ made from the Arecibo Observatory achieved by using a frequency-agile resonance fluorescence lidar. Simultaneous observations of the electron concentration of the lower ionosphere using the Arecibo incoherent scatter radar were also made, as well as K lidar observations of the mesospause region. We find excellent agreement in the distribution of ions observed between the lidar and radar for both the thin tidal ion layers and for broader formations of ionization that occasionally occur near 90 km altitude. The concentration of Ca+ within ion layers was found to be slightly less than the relative fraction of calcium in meteors, and generally consistent with previous lidar, rocket, and twilight airglow measurements.

Published 7 January 2003.

Citation: Tepley, C. A., S. Raizada, Q. Zhou, and J. S. Friedman (2003), First simultaneous observations of Ca+, K, and electron density using lidar and incoherent scatter radar at Arecibo, Geophys. Res. Lett., 30(1), 1009, doi:10.1029/2002GL015927.

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