異常気象をもたらす大気の大波「北極振動」と2010年猛暑の関係

• Main Authors: 立花 義裕, 大富 裕里子, 中村 哲, Yoshihiro TACHIBANA, Yuriko OTOMI, Tetsu NAKAMURA
• Format: Report
• Language: Japanese
• Published: 三重大学大学院生物資源学研究科 2012
• Subjects: 高校地学; 自然災害; 北極振動; 異常気象; Arctic
• Online Access: http://hdl.handle.net/10076/11844; https://mie-u.repo.nii.ac.jp/?action=repository_uri&item_id=6177; https://mie-u.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6177&item_no=1&attribute_id=17&file_no=1

In 2010, the Northern Hemisphere, in particular Russia and Japan, experienced an abnormally hot summer characterized by record-breaking warm temperatures and associated with a strongly positive Arctic Oscillation （AO）, that is, low pressure in the Arctic and high pressure in the midlatitudes. In contrast, the AO index the previous winter and spring （2009/2010） was record-breaking negative. The AO polarity reversal that began in summer 2010 can explain the abnormally hot summer. The AO-related summertime tropical oceanic warm temperature anomaly might have been a remote cause of the formation of blocking highs in the Europe, thus amplifying the positive summertime AO. Understanding of this interseasonal linkage may aid in the long-term prediction of such abnormal summer events.