An Integrated Precipitation Product for the Arid and Semi-arid Regions of China

<p>We integrate various reanalysis, meteorological observation,&nbsp;and satellite precipitation datasets, including CRU (Climate Research Unit), MERRA2 (Modern-Eta Retrospective Analysis for Research and Applications&nbsp;version2), CMAP (Climate Prediction Center&nbsp;(CPC)&nbsp;integrated&nbsp;analysis of monthly precipitation), GPCP (Global Precipitation Climatology Project) and GPM (Global Precipitation Measurement), to create a new monthly precipitation product with a spatial resolution approximately&nbsp;0.2&deg; &times; 0.2&deg; (latitude &times; longitude)&nbsp;during the period from 1980 to 2019 in ASRC. The new product was validated&nbsp;with observations at different temporal scales (e.g., monthly to yearly variability and trends). The results show that the new product improves the accuracy of precipitation with the lower bias of -1.1&nbsp;mm month^-1. The annual trend of integrated precipitation is 0.09 mm/year which is consistent with the trend of observation.&nbsp;</p>