| Summary: | application/pdf Interannual variation of the Antarctic dipole shaped sea-ice pattern, which is a heavy ice condition over the Pacific sector whereas a light ice condition over the Atlantic sector, is influenced by the Pacific South American Pattern ( PSA pattern ). This study investigates the influence of the dipole sea-ice pattern upon large-scale atmospheric circulations by using an Atmospheric General Circulation Model (AGCM), in which sea-ice boundary condition is fixed as; 1) a dipole pattern, 2) a negative dipole pattern, and 3) climatology. Comparison of atmospheric responses to the three boundary conditions can isolate the influence of the anomalous sea-ice dipole-shaped distribution upon large scale atmosphere. The result shows that the influence of sea-ice upon the atmosphere dominantly occurs in the Pacific sector than the Atlantic sector. In addition, the pattern that appears in the atmosphere is similar to the PSA pattern. Moreover, that influence makes the atmospheric amplitude lager. 三重大学大学院生物資源学研究科博士前期課程共生環境学専攻 29 thesis
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