We, Asian hydroclimatological research community launched Asian Precipitation Experiment (AsiaPEX) in 2019 as the successor of Asian Regional Hydroclimatological Projects (RHPs), GEWEX Asian Monsoon Experiment (GAME, 1995-2005) and Monsoon Asian Hydro-Atmosphere Scientific Research and Prediction Initiative (MAHASRI, 2006-2016), which had lead Asian hydroclimatological research community for decades under the perspective of GEWEX/WCRP. The focus of AsiaPEX is scientific understanding of the Asian precipitation controlled by the Asian monsoon system. However, at the same time, we realize that the changing pattern of the Asian monsoon system and precipitation has huge impact on life of billions of people living in Asian countries and regions. Therefore, our objective, understanding of terrestrial precipitation over diverse hydroclimatological conditions, is combined with the societal needs such as improved predictions, disaster reduction, and sustainable development over Asia. Scientifically, our target is the land-atmosphere coupling mechanisms and interactions among variabilities with scales ranging from decades to diurnal. Especially, we presume that key for the breakthrough should be at the "bottom" of the Asian monsoon system, the land surface atmosphere interaction and diurnal cycle, which is on the other hand the stage of the practical research works. Following our six research approaches have intimate relationship with society. 1) Observation and estimation of precipitation is associated with societal needs for the detection, attribution and future projection of precipitation, which is the base for adaptation and mitigation for the impacts of climate change. 2) Process studies targeting on the land surface process are related with the prediction of droughts and heat waves. 3) Scale interaction shall provide improvements of long-term climate predictability. 4) Fine scale hydrological modeling involving the anthropogenic activities and cryosphere are key for the water resource management. 5) Coordinated observational and modeling initiative will codevelop with operational meteorological and hydrological agencies in Asia. 6) Climate projection is also aiming at the need to deliver useful outcome in the society. We will discuss about contributions through these approaches.
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