･The turnabout of air temperature anomalies over East Asia between the first and second halves of winter 2020/21 was examined from a teleconnection perspective with regionally different convective heating anomalies over the Indo-western Pacific sector.
･To investigate the differences in the formation and maintenance mechanisms of the two teleconnection patterns of SAJ pattern and WP pattern, we extracted the patterns that occurred in the past from the atmospheric data of the past 47 years, and performed vorticity budget analysis and numerical model experiments.
･By examining the transition between cold and warm conditions during the winter in such detail, this research is expected to contribute to improving the accuracy of seasonal forecasts.
