Quantifying the Spatial Characteristics of the Moisture Transport Affecting Precipitation Seasonality and Recycling Variability in Central Asia

作     者：Linhao ZHONG Lijuan HUA Zhaohui GONG Yao YAO Lin MU Linhao ZHONG;Lijuan HUA;Zhaohui GONG;Yao YAO;Lin MU

作者机构：National Institute of Natural HazardsMinistry of Emergency Management of ChinaBeijing 100085China Key Laboratory of Computational GeodynamicsCollege of Earth and Planetary SciencesUniversity of Chinese Academy of SciencesBeijing 100049China CAS Key Laboratory of Regional Climate-Environment for Temperate East AsiaInstitute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of SciencesBeijing 100049China College of Life Sciences and OceanographyShenzhen UniversityShenzhen 518060China 

出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展（英文版）)

年 卷 期：2022年第39卷第6期

页      面：967-984页

核心收录：

学科分类：07[理学] 0706[理学-大气科学] 

基　　金：supported by the Strategic Priority Research Program of Chinese Academy of Sciences Sci-ences under Grant No.XDA20020201 the National Natural Sci-ence Foundation of China(NSFC)under Grant Nos.41975099,U2006210,and 41475072. 

主　　题：Central Asia precipitation seasonality recycling ratio moisture transport dynamical recycling model interdecadal variability 

摘      要：Moisture contribution and transport pathways for Central Asia(CA)are quantitatively examined using the Lagrangian water cycle model based on reanalysis and observational data to explain the precipitation seasonality and the moisture transport variation during 1979-2015.Westerly-related(northwesterly and westerly)transport explains 42%of CA precipitation and dominates in southwest CA,where precipitation is greatest in the cold season.Southeast CA,including part of Northwest China,experiences its maximum precipitation in the warm season and is solely dominated by southerly transport,which explains about 48%of CA precipitation.The remaining 10%of CA precipitation is explained by northerly transport,which steadily impacts north CA and causes a maximum in precipitation in the warm season.Most CA areas are exposed to seasonally varying moisture transport,except for southeast and north CA,which are impacted by southerly and northerly transport year-round.In general,the midlatitude westerlies-driven transport and the Indian monsoon-driven southerly-related transport explain most of the spatial differences in precipitation seasonality over CA.Moreover,the contribution ratio of local evaporation in CA to precipitation exhibits significant interdecadal variability and a meridionally oriented tripole of moisture transport anomalies.Since the early 2000s,CA has experienced a decade of anomalously low local moisture contribution,which seems jointly determined by the weakened moisture contribution from midlatitudes(the Atlantic,Europe,and CA itself)and the enhanced contribution from high latitudes(West Siberia and the Arctic)and tropical areas(South Asia and the Indian Ocean).