Detection of a climatological short break in the polar night jet in early winter and its relation to cooling over Siberia

Yuta Ando1, Koji Yamazaki2, Yoshihiro Tachibana1, Masayo Ogi3 and Jinro Ukita4, (1)Mie University, Weather and Climate Dynamics Division, Tsu, Japan, (2)Hokkaido University, Sapporo, Japan, (3)Hokkaido University, Research Development Section, Sapporo, Japan, (4)Niigata University, Faculty of Science, Niigata, Japan