Variation of Dust in Northern China and Its Reproduction in BCC-ESM1 since 1980  

作　　者：Yumeng ZHOU Tongwen WU Jie ZHANG Yong ZHANG Yanwu ZHANG He ZHAO Weihua JIE Yang ZHOU Kalli FURTADO 

机构地区：[1]Chinese Academy of Meteorological Sciences,China Meteorological Administration,Beijing 100081,China [2]Earth System Modeling and Prediction Centre,China Meteorological Administration,Beijing 100081,China [3]Sichuan Climate Center/Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province,Chengdu 610072,China [4]State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,China Meteorological Administration,Beijing 100081,China [5]Meteorological Observation Centre,China Meteorological Administration,Beijing 100081,China [6]Nanjing University of Information Science&Technology,Nanjing 210044,China [7]Met Office Hadley Centre,Exeter EX13PB,United Kingdom

出　　处：《Journal of Meteorological Research》2023年第5期617-631,共15页气象学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (42230608)。

摘　　要：In this paper,we explore the possible causes and mechanisms for the variation of dust in northern China from 1980to 2014 using the Modern-Era Retrospective analysis for Research and Applications version 2(MERRA-2)data,observational data,and BCC-ESM1(Beijing Climate Center Earth System Model version 1)simulation data.Two important dust centers are identified in China:one in the Taklamakan Desert in southern Xinjiang Region and the other in the Badain Jaran Desert in western Inner Mongolia Plateau.Both centers display distinct seasonal variations,with high dust concentration in spring and summer and low in autumn and winter.BCC-ESM1 is able to generally capture the main spatial and temporal characteristics of dust in northern China.Both the MERRA-2 reanalysis data and BCCESM1 simulation data show a decreasing trend in spring dust,which is evident during 1980–2000 and 2001–2014.The analysis based on daily mean dust loads and wind fields from MERRA-2 and BCC-ESM1 indicates that dusty weather in North China may be mainly caused by transport of the dust,especially that from the central and western Inner Mongolia Plateau during the prior 0–2 days,through the westerly winds from the upstream“dust core”region(38°–45°N,90°–105°E).This is one of the important paths for dust to move into North China.The weakened westerly wind in the lower troposphere in this“dust core”region may be responsible for the reduction of spring dust in North China.

关 键 词：dust aerosols Coupled Model Intercomparison Project Phase 6(CMIP6) earth system models 

分 类 号：P425.55[天文地球—大气科学及气象学]