HR: 0830h
AN: SA51B-0512    [PDF]
TI: Metal and ion layers observed by resonance lidars and incoherent scatter radar at Arecibo
AU: * Friedman, J S
EM: jonathan@naic.edu
AF: NAIC Arecibo Observatory, HC-03 Box 53995, Arecibo, PR 00612 United States
AU: Raizada, S
EM: shikha@naic.edu
AF: NAIC Arecibo Observatory, HC-03 Box 53995, Arecibo, PR 00612 United States
AU: Tepley, C A
EM: craig@naic.edu
AF: NAIC Arecibo Observatory, HC-03 Box 53995, Arecibo, PR 00612 United States
AU: Zhou, Q
EM: zhouq@muohio.edu
AF: Miami University, Manufacturing and Mechanical Engineering Department, Oxford, OH 45056 United States
AU: Morton, Y
EM: mortonyt@muohio.edu
AF: Miami University, Manufacturing and Mechanical Engineering Department, Oxford, OH 45056 United States
AU: Sulzer, M P
EM: sulzer@naic.edu
AF: NAIC Arecibo Observatory, HC-03 Box 53995, Arecibo, PR 00612 United States
AU: Gonzalez, S A
EM: sixto@naic.edu
AF: NAIC Arecibo Observatory, HC-03 Box 53995, Arecibo, PR 00612 United States
AB: Observations of the mesopause-region potassium and sodium layers using the resonance lidar technique have been carried out at the Arecibo Observatory (18.35$^{\circ}$N, 66.75$^{\circ}$W) for a number of years. These observations have often coincided with $E$-region observations by the incoherent scatter radar. In this presentation, we examine the seasonal and diurnal variability of K/Na/ion layer content and height. In particular, we have found that sporadic layers are far more prevalent in summer than other times of year. We have also developed algorithms to study the layer structures in detail, including the densities and trajectories of thin metal layers. The neutral metal layers will be compared to the ion layers to reveal whether and how the two phenomena are dynamically and chemically linked.
DE: 0335 Ion chemistry of the atmosphere (2419, 2427)
DE: 0341 Middle atmosphere--constituent transport and chemistry (3334)
DE: 0355 Thermosphere--composition and chemistry
DE: 2419 Ion chemistry and composition (0335)
SC: SPA - Aeronomy [SA]
MN: 2003 Fall Meeting