LAUSR

Based on observed precipitation, European Centre for Medium‐Range Weather Forecasts Reanalysis 5 (ERA5) reanalysis and global sea surface temperature (SST) datasets, this article investigates the interannual variations of precipitation over the lower reaches of the Jinsha River basin (LJRB) in June, July, and August. The results show that the interannual variations of precipitation are roughly independent among the months and related to the distinct anomalies of circulation and SST. At 200 hPa, the enhanced precipitation is related to the positive circumglobal teleconnection (CGT) phase, a cyclonic anomaly over North China and the southward shift of the Asia westerly jet in June, July, and August, respectively. Furthermore, the wind anomalies at 550 and 650 hPa related to the enhanced precipitation are analyzed due to the topography. The wind anomalies in June and July are similar, with the easterly anomalies over the northwest of the LJRB at 550 hPa and northeasterly anomalies along the Hengduan Mountains (HMs) at 650 hPa. In contrast, the wind anomalies in August are characterized by the westerly anomalies over the west of the LJRB at 550 hPa and southwesterly anomalies along the HMs at 650 hPa. Additionally, the enhanced precipitation is correlated with the cooler SSTs in the North Indian Ocean (NIO) in June. However, the relationship between the precipitation and global SST is weak in July and August.