HR: 17:50h
AN: SA24A-07    [Abstracts]
TI: Comparison Of The Mesospheric Bore Characteristics Imaged At Equatorial And Mid- Latitudes
AU: * Medeiros, A F
EM: afragoso@df.ufcg.edu.br
AF: Universidade Federal de Campina Grande (UFCG), Rua Aprígio Veloso, 882 - Bodocongo, Campina Grande, PB 58.109-900, Brazil
AU: Taylor, M J
EM: mtaylor@cc.usu.edu
AF: Center for Atmospheric and Space Sciences and Physics Department, Utah State University, 4405 Old Main Hill, Logan, UT 84322-4405, United States
AU: Fechine, J A
EM: joaquim@laser.inpe.br
AF: Instituto Nacional de Pesquisas Espaciais (INPE), Av dos Astronautas, 1.758 Jd. Granja, Sao Jose dos Campos, SP 12227-010, Brazil
AU: Takashi, H
EM: hisaotak@laser.inpe.br
AF: Instituto Nacional de Pesquisas Espaciais (INPE), Av dos Astronautas, 1.758 Jd. Granja, Sao Jose dos Campos, SP 12227-010, Brazil
AU: Buriti, R A
EM: rburiti@df.ufcg.edu.br
AF: Universidade Federal de Campina Grande (UFCG), Rua Aprígio Veloso, 882 - Bodocongo, Campina Grande, PB 58.109-900, Brazil
AU: Wrasse, C M
EM: cmwmax@yahoo.com
AF: Instituto Nacional de Pesquisas Espaciais (INPE), Av dos Astronautas, 1.758 Jd. Granja, Sao Jose dos Campos, SP 12227-010, Brazil
AB: Mesospheric bores are remarkable gravity wave events that are characterized by a sharp leading front usually followed by a coherent train of waves that grow in number with time. To date, there have been only a few reports of such events in the literature. However, recent analysis of mesospheric airglow image data from at São João do Cariri, Brazil, and from Bear Lake Observatory, Utah, USA have revealed a relatively large number of bore-like (typically 25-50 events per year). This paper focuses on a detailed comparison of these two data sets which were obtained from two well-separated sites at equatorial and mid-latitudes under differing mesospheric conditions. At São João do Cariri (7°S, 36°W) all-sky CCD image measurements of gravity waves in the near infrared OH Meinel, O2 (0,1) bands, and the OI (557.7 nm) line nightglow emissions were made over a two- year period from September 2000 to September 2002. At Bear Lake Observatory (41.6°N, 111.6°W) all-sky measurements of mesospheric gravity waves in the same three nightglow emissions were obtained over a 2-year period from January 2002 to December 2003. These two data sets have been investigated to determine the occurrence and typical properties of undular mesospheric bore events as observed at equatorial and mid-latitudes. In this paper we will describe their main characteristics and contrast their differing properties.
DE: 0310 Airglow and aurora
DE: 0342 Middle atmosphere: energy deposition (3334)
DE: 3332 Mesospheric dynamics
DE: 3334 Middle atmosphere dynamics (0341, 0342)
DE: 3394 Instruments and techniques
SC: SPA-Aeronomy [SA]
MN: 2007 Joint Assembly