Dominant Contribution of South Asia Monsoon to External Moisture for Extreme Precipitation Events in Northern Tibetan Plateau

Numerous previous studies have pointed out that the South Asia monsoon (SAM) contributes most moisture to southern Tibetan Plateau, whilst over Northern Plateau (NTP) is supplied by westerlies, but sources for extreme precipitation events remain unclear. In this study, tracking of external was performed on ten each six target subregions NTP during summer 2010–2018. We found SAM provided in NTP, except largest contribution from East easternmost subregion. The carried westerly winds second foreign source western NTP. addition, more than 40% occurred under synergy weak westerlies and enhanced SAM, these a longer duration others. Thus, plays key role transport even though its climatological not significant.