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The Tibetan Plateau (TP) is the origin of many large Asian rivers, which provide water resources for large regions in south andeast Asia. Therefore, the water cycle on the TP and adjacent high mountainranges, in particular the precipitation distribution and variability play animportant role for the water availability for billions of people in thedownstream regions of the TP.  The High Asia Refined analysis (HAR) is used to analyse the dynamicalfactors that influence precipitation variability in the TP region,including the factors resulting in the enhancement and suppression ofprecipitation. Four dynamical fields that can influence precipitation areconsidered: the 300 hPa wind speed and wind speed 2 km aboveground, the 300 hPa vertical wind speed, and the atmospheric watertransport. The study focusses on the seasonality and the spatial variabilityof the precipitation controls and their dominant patterns. Results show thatdifferent factors have different effects on precipitation in differentregions and seasons. This depends mainly on the dominant type ofprecipitation, i.e. convective or frontal/cyclonic precipitation. Additionally,the study reveals that the midlatitude westerlies have a high impact on theprecipitation distribution on the TP and its surroundings year-round and notonly in winter

Seasonality and spatial variability of dynamic precipitation controls on theTibetan Plateau