冬季極域でのオゾン破壊過程シュミレーションモデルの構築について

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概要

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• Stratospheric ozone destruction by anthropogenic chemical substances is well known as one of the serious global environmental problems. In the Polar Regions, significant chemical ozone destruction has been observed. The understanding of chemically induced ozone loss in the polar stratosphere has increased significantly over the past decade. However, quantitative estimatesof ozone loss remain uncertain. Especially in the Arctic, chemical conditions in the winter stratosphere highly depend on dynamic processes; thus, it is difficult to estimate the amount of chemical ozone destruction quantitatively. Therefore, a detailed study on chemical ozone destructionprocesses is required.We constructed a simulation model of polar ozone destruction processes using a chemical box model combined with a trajectory tool. The chemical box model includes the sufficient number of chemical reactions in order to explain the chemical processes in winter polar region. It also includes the TUV (Thopospheric Ultraviolet and Visible Radiation Model) to calculatemultiple scattering of solar ultraviolet flux, which is important for simulatingradical species that are sensitive to ultraviolet intensity. The chemical boxmodel is run along the trajectories to obtain the mixing ratios of the chemicalspecies.The simulation model reproduced ozone destruction processes in winter polar region successfully. This report describes the details of the simulation model and demonstrates its validity for ozone studies.

• 2007-03-31

著者

• 林田 佐智子

  奈良女子大学大学院人間文化研究科

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