Compound events of heatwave and dust storm in the Taklamakan Desert  

作　　者：Yuzhi LIU Jianping HUANG Ziyuan TAN Chenglong ZHOU Dan LI Yongkun XIE 

机构地区：[1]Key Laboratory for Semi-Arid Climate Change of the Ministry of Education,Lanzhou University,Lanzhou 730000,China [2]Collaborative Innovation Center for Western Ecological Safety,Lanzhou University,Lanzhou 730000,China [3]Taklamakan National Station of Observation and Research for Desert Meteorology in Xinjiang,Urumqi 830002,China

出　　处：《Science China Earth Sciences》2024年第7期2073-2083,共11页中国科学（地球科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.41991231 and 91937302);the Fundamental Research Funds for the Central Universities(Grant No.lzujbky-2022-kb11)。

摘　　要：Taklamakan Desert(TD)has been characterized by numerous heatwaves and dust storms,leading to negative effects on societies and ecosystems at regional and global scales.However,the association between heatwaves and dust storms is poorly known.In this study,we describe the association between heatwaves and dust events and propose a mechanism for such compound events in the TD.The results show that,from 1993 to 2022,the frequency and intensity of heatwaves in the TD have increased at a rate of 0.21 days year^(-1)and 0.02℃ year^(-1),respectively.More than 40% of heatwaves existed with dust events,which significantly lagged behind heatwaves.Mechanically,the higher the air temperature,the hotter and drier the soil,leading to more dust emissions in the TD.In high-occurrence heatwave years,a large-scale wave train of“cyclone-anticyclone-cyclone”in the northwest-southeast direction was found,with the anticyclone of which hovered over the TD region.The anomalous anticyclones favored the formation and maintenance of heatwaves,and subsequent anomalous cyclones in the wave train triggered strong dust events followed by heatwaves.With climate warming,the compound events of heatwave and dust storm are becoming bigger hazards threatening the socioeconomic and ecological security in the TD,the profound study of which is critical to understanding regional extreme responses.

关 键 词：HEATWAVE Dust storm Compound events Taklamakan Desert 

分 类 号：P425.55[天文地球—大气科学及气象学] P423