A New Merged Product Reveals Precipitation Features over Drylands in China  

作　　者：Min LUO Yuzhi LIU Jie GAO Run LUO Jinxia ZHANG Ziyuan TAN Siyu CHEN Khan ALAM 

机构地区：[1]Key Laboratory for Semi-Arid Climate Change of the Ministry of Education,College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China [2]Collaborative Innovation Center for Western Ecological Safety,Lanzhou University,Lanzhou 730000,China [3]Department of Physics,University of Peshawar,Peshawar 25120,Pakistan

出　　处：《Advances in Atmospheric Sciences》2024年第10期2079-2091,共13页大气科学进展（英文版）

基　　金：supported by the National Natural Science Foundation of China the National Natural Science Foundation of China(Grant No.41991231);the Fundamental Research Funds for the Central Universities(lzujbky-2022-kb11).

摘　　要：Due to the considerable uncertainties inherent in the datasets describing the spatiotemporal distributions of precipitation in the drylands of China,this study presents a new merged monthly precipitation product with a spatial resolution of approximately 0.2°×0.2°during 1980–2019.The newly developed precipitation product was validated at different temporal scales(e.g.,monthly,seasonally,and annually).The results show that the new product consistently aligns with the spatiotemporal distributions reported by the Chinese Meteorological Administration Land Data Assimilation System(CLDAS)product and Multi-Source Weighted Ensemble Precipitation(MSWEP).The merged product exhibits exceptional quality in describing the drylands of China,with a bias of–2.19 mm month^(–1)relative to MSWEP.In addition,the annual trend of the merged product(0.09 mm month^(–1)yr^(−1))also closely aligns with that of the MSWEP(0.11 mm month^(–1)yr^(−1))during 1980–2019.The increasing trend indicates that the water cycle and wetting process intensified in the drylands of China during this period.In particular,there was an increase in wetting during the period from 2001–2019.Generally,the merged product exhibits potential value for improving our understanding of the climate and water cycle in the drylands of China.

关 键 词：PRECIPITATION merged dataset DRYLANDS water cycle 

分 类 号：P426.6[天文地球—大气科学及气象学] P339[天文地球—水文科学]