Horizontal Phase Speed Distribution of Gravity Waves Observed in Mesospheric Temperature Maps

• Main Authors: Talaei, Ahmad, Taylor, Michael J., Pautet, Pierre-Dominique, Zhao, Yucheng, Matsuda, Takashi S., Nakamura, Takuji
• Format: Text
• Language: unknown
• Published: Hosted by Utah State University Libraries 2015
• Subjects: Atmospheric Sciences; Physics; South Pole; Antarc*; Antarctica; South pole
• Online Access: https://digitalcommons.usu.edu/graduate_posters/28; https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1027&context=graduate_posters

The goal of the current work is to develop a method suitable for analyzing the horizontal phase speeds of atmospheric gravity waves from an extensive amount of gravity wave data obtained by the USU Advanced Mesospheric Temperature Mapper (AMTM) from Antarctica. The AMTM is a novel infrared digital imaging system that measures selected emission lines in the mesospheric OH (3,1) band to create intensity and temperature maps of the mesosphere. This analysis builds on the recent work by Matsuda et al 2014 using all-sky intensity data to investigate the horizontal phase speed distribution. In our analyses we applied this technique to measure spectrum from temperature maps with more limited 120 degree field of view but 24 hr. measurements at South Pole. The ground-based remote sensing temperature measurements have been obtained using the nighttime hydroxyl (OH) emission, which originates at an altitude of ∼87 km. The results are compared to intensity data and to conventional event analysis in which the phase fronts are traced manually