Interannual Variations of Rainfall in Late Spring over Southwest China and Associated Sea Surface Temperature and Atmospheric Circulation Anomalies

Based on rainfall data for the period of 1960–2018 from 382 stations in southwest China and multiple reanalysis datasets, interannual variation late spring over Southwest associated sea surface temperature atmospheric circulation anomalies are examined. The first leading mode late-spring displays a uniform-distribution pattern. second shows zonal dipole is related to an wave train mid-high latitudes Eurasia, with center action anomaly China. modulate there via modulating vertical motion water vapor transport. In addition, has close relation (SSTA) central eastern equatorial Pacific. SSTA Pacific impacts modulation tropical Walker Hadley circulation. closely western latitude train. together leads out-of-phase meridional wind between parts China, which further results