JpGU-AGU Joint Meeting 2017

講演情報

[EE] ポスター発表

セッション記号 P (宇宙惑星科学) » P-EM 太陽地球系科学・宇宙電磁気学・宇宙環境

[P-EM11] [EE] Mesosphere-Thermosphere-Ionosphere Coupling in the Earth's Atmosphere

2017年5月24日(水) 15:30 〜 17:00 ポスター会場 (国際展示場 7ホール)

コンビーナ:Chang Loren(Institute of Space Science, National Central University)、Liu Huixin(九州大学理学研究院地球惑星科学専攻 九州大学宙空環境研究センター)、齊藤 昭則(京都大学大学院理学研究科地球物理学教室)、Tzu-Wei Fang

[PEM11-P22] Reverse Ray Tracing of Mesospheric Gravity Waves over the Antarctic Peninsula

*Brittany Williams1Eric Davis1Kim Nielsen1Michael Taylor2 (1.Utah Valley University、2.Utah State University)

キーワード:Aeronomy , Gravity Waves, Ray Tracing

The majority of studies of atmospheric gravity waves are concerned with waves observed at equatorial and mid latitudes. In the early 2000’s Utah State University and British Antarctic Survey initiated a long term study of these waves over the Antarctica utilizing mesospheric airglow imagers, which has progressed into a comprehensive Antarctic observation network (ANGWIN). A recent long term analysis of gravity wave characteristics from two observation sites: Halley and Rothera, has revealed a distinct difference in predominate propagation directions between the two. Though Halley exhibited propagation directions changing with seasons, Rothera showed a remarkable fixed preference for westward propagating waves. While the waves observed over Rothera revealed freely propagating characteristics in the observed mesospheric region, their source location and origin remains unanswered. In this project we have focused on investigating the propagation of the waves from the observation point to their origin through a simple reverse ray tracing scheme. By analyzing ray tracing trends over two years of data we provide a preliminary overview of propagation characteristics and discuss the impact of orographic generated waves over the Antarctic peninsula.