[P-EM05_2AM2] Characteristics of atmospheric waves in the mesosphere-lower thermosphere (MLT)

[PEM05-10] SMILESが捉えた日食時の中間圏オゾンの変動について

*今井 弘二¹、秋吉 英治²、高橋 けんし³、山下 陽介²、今村 隆史²、鈴木 睦¹、海老沢 研¹、塩谷 雅人³ (1.宇宙航空研究開発機構 宇宙科学研究所、2.国立環境研究所、3.京都大学 生存圏研究所)

キーワード：SMILES, オゾン, 中間圏

Solar eclipse temporally reduces the amount of solar radiation, providing an opportunity to verify the ozone photochemistry under changing solar radiation. During the longest annular solar eclipse in this millennium occurred on 15 January 2010, Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) successfully captured increased ozone mostly in the mesosphere with a decrease in solar illuminations. The ozone increment shows altitude dependence in the mesosphere. Using an atmospheric chemistry box model, it is found that the dependence results from the difference in chemical reaction rates to the solar radiation change. The model also predicts the difference in the ozone concentration evolution between the sunlight decreasing and increasing phases, although SMILES observation does not resolve the difference.