Prediction Method for Summer Precipitation on the Tibetan Plateau Based on Sea Surface Temperature Anomalies in the Indian Ocean

Using station data from the Tibetan Plateau and monthly reanalysis data from the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR), the relationship between sea surface temperature in the tropical Indian Ocean and summer precipitation on the Tibetan Plateau was investigated. The conclusions are as follows: 1) When the sea surface temperature in the Indian Ocean uniformly warms, the moisture transported to the Tibetan Plateau increases, leading to more summer precipitation on the Tibetan Plateau; conversely, when the sea surface temperature in the Indian Ocean is cooler, the moisture transported to the Tibetan Plateau decreases, resulting in less summer precipitation on the Tibetan Plateau. 2) When the Somali Jet at 925 hPa is weaker, the Somali Jet at 700 hPa is stronger, which also leads to increased moisture transport from the Indian Ocean to the plateau, causing more summer precipitation on the Tibetan Plateau; whereas, when the Somali Jet at 925 hPa is stronger, the Somali Jet at 700 hPa is weaker, leading to decreased moisture transport from the Indian Ocean to the plateau, resulting in less summer precipitation on the Tibetan Plateau.