PM_(10) dust emission in the Erenhot-Huailai zone of northern China based on model simulation  

作　　者：WANG Yong YAN Ping WU Wei WANG Yijiao HU Chanjuan LI Shuangquan 

机构地区：[1]Institute of Geographical Sciences,Henan Academy of Sciences,Zhengzhou 450052,China [2]Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China [3]State Key Laboratory of Earth Surface Processes and Resource Ecology,Beijing Normal University,Beijing 100875,China [4]College of Urban and Environmental Sciences,Hubei Normal University,Huangshi 435002,China

出　　处：《Journal of Arid Land》2025年第3期324-336,共13页干旱区科学(英文版)

基　　金：supported by the National Basic Research Program of China (2016YFA0601901);Basic Scientific Research of Henan Academy of Sciences (240601083);Joint Fund of Henan Province Science and Technology Research and Development Program (225200810047)。

摘　　要：The Erenhot-Huailai zone, as an important dust emission source area in northern China, affects the air quality of Beijing City, Tianjin City, and Hebei Province and human activities in this zone have a profound impact on surface dust emission. In order to explore the main source areas of surface dust emission and quantify the impacts of human activities on surface dust emission, we investigated the surface dust emission of different land types on the Erenhot-Huailai zone by model simulation, field observation, and comparative analysis. The results showed that the average annual inhalable atmospheric particles(PM_(10)) dust emission fluxes in arid grassland, Hunshandake Sandy Land, semi-arid grassland,semi-arid agro-pastoral area, dry sub-humid agro-pastoral area, and semi-humid agro-pastoral area were 4.41, 0.71, 3.64, 1.94, 0.24, and 0.14 t/hm^(2), respectively, and dust emission in these lands occurred mainly from April to May. Due to the influence of human activities on surface dust emission, dust emission fluxes from different land types were 1.66–4.41 times greater than those of their background areas, and dust emission fluxes from the main dust source areas were 1.66–3.89 times greater than those of their background areas. According to calculation, the amount of PM_(10) dust emission influenced by human disturbance accounted for up to 58.00% of the total dust emission in the study area. In addition, the comparative analysis of model simulation and field observation results showed that the simulated and observed dust emission fluxes were relatively close to each other, with differences ranging from 0.01 to 0.21 t/hm^(2) in different months, which indicated that the community land model version 4.5(CLM4.5) had a high accuracy. In conclusion, model simulation results have important reference significance for identifying dust source areas and quantifying the contribution of human activities to surface dust emission.

关 键 词：northern China classification of land type model simulation dust emission human disturbance 

分 类 号：F42[经济管理—产业经济]