日本地球惑星科学連合2014年大会

講演情報

口頭発表

セッション記号 P (宇宙惑星科学) » P-CG 宇宙惑星科学複合領域・一般

[P-CG38_1PM2] 惑星大気圏・電磁圏

2014年5月1日(木) 16:15 〜 18:00 423 (4F)

コンビーナ:*今村 剛(宇宙航空研究開発機構 宇宙科学研究本部)、関 華奈子(名古屋大学太陽地球環境研究所)、高橋 幸弘(北海道大学・大学院理学院・宇宙理学専攻)、高橋 芳幸(惑星科学研究センター)、深沢 圭一郎(九州大学情報基盤研究開発センター)、中川 広務(東北大学 大学院理学研究科 地球物理学専攻太陽惑星空間物理学講座 惑星大気物理学分野)、座長:中川 広務(東北大学 大学院理学研究科 地球物理学専攻太陽惑星空間物理学講座 惑星大気物理学分野)

17:30 〜 17:45

[PCG38-P06_PG] ハワイ・マウナケア山頂における赤外ヘテロダイン分光惑星観測計画

ポスター講演3分口頭発表枠

*中川 広務1青木 翔平1笠羽 康正1村田 功1佐川 英夫2 (1.東北大学、2.情報通信研究機構)

キーワード:赤外分光, ヘテロダイン, レーザー, 観測, 惑星大気, 同位体

We propose a new developed infrared heterodyne instrument, called Mid-Infrared LAser Heterodyne Instrument (MILAHI), for our dedicated telescope at the top of Mt. Haleakala, Hawaii. It addresses the key physical/meteorological parameters, such as the atmospheric temperature profiles, abundance profiles of the atmospheric compositions and their isotopes, and wind velocity. The observational sensitivity of MILAHI is discussed in this paper. The scientific target of MILAHI is to understand highly variable phenomena in the planetary atmospheres. The nature of atmospheric activity in various time-scale will be investigated by continuous monitoring with our dedicated telescope, in order to increase our understanding of planetary atmospheric dynamics, photochemistry, and meteorology. New measurements with high spatial/spectral resolutions constrain the three-dimensional distributions of temperature and compositions. The D/H and other isotopic ratios, diagnostic of the terrestrial atmosphere evolution, will be accurately measured in H2O and CO2. The atmospheric chemistry will be studied by monitoring O3, H2O2, H2O, and HDO. Mapping of the H2O isotopes reveal the mechanism of complex interaction between regolith-aerosols-atmosphere-polar caps on Mars. Direct measurements of wind velocity and temperature allow the first monitoring of the middle atmosphere oscillations to investigate the effects of the gravity waves from the lower atmosphere on the upper atmosphere for various seasons and dust loadings. A number of organics molecule bands in the mid-infrared regime will be accurately measured in planetary/cometary/stellar atmospheres. In addition to these interconnected objectives, serendipitous searches with our advantage of dedicated use for astronomical/atmospheric transient events which occur at frequent and unpredictable intervals (e.g. dust storm) will enhance our knowledge of the composition and dynamics of the astronomical sources.