Vegetation-related dry deposition of global PM_(2.5) from satellite observations

作     者：FENG Huihui DING Ying ZOU Bin COHEN Jason Blake YE Shuchao YANG Zhuolin QIN Kai LIU Lei GU Xiaodong FENG Huihui;DING Ying;ZOU Bin;COHEN Jason Blake;YE Shuchao;YANG Zhuolin;QIN Kai;LIU Lei;GU Xiaodong

作者机构：School of Geosciences and Info-PhysicsCentral South UniversityChangsha 410083China Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring of Chinese Ministry of EducationChangsha 410083China School of Atmospheric SciencesSun Yat-sen UniversityGuangzhou 510275China School of Environment Science and Spatial InformaticsChina University of Mining and TechnologyXuzhou 221116JiangsuChina College of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China Guangzhou Center for Rule of Green Development Law StudiesGuangdong University of Foreign StudiesGuangzhou 510420China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)Guangzhou 511458China 

出 版 物：《Journal of Geographical Sciences》 (地理学报（英文版）)

年 卷 期：2022年第32卷第4期

页      面：589-604页

核心收录：

学科分类：07[理学] 070602[理学-大气物理学与大气环境] 09[农学] 0903[农学-农业资源与环境] 0706[理学-大气科学] 0713[理学-生态学] 

基　　金：National Natural Science Foundation of China,No.42071378 Natural Science Foundation of Hunan Province,No.2020JJ3045 Foundation of Natural Science of Guangdong,No.2019BT02H594 

主　　题：air pollution PM_(2.5) dry deposition vegetation change globe satellite 

摘      要：Vegetation plays an important role in the dry deposition of particles with significant spatial variability,but the magnitude remains unclear at the global *** the aid of satellite products,this study estimated the vegetation-related dry deposition of fine particulate matter(PM_(2.5)).Methodologically,dry deposition was first calculated using an empirical ***,deposition on the leaf surface was estimated to evaluate the influence of *** results showed that the mean deposition velocity(V_(d))of global PM_(2.5)was 0.91×10^(-3)μg·m^(-2)·s^(-1),with high velocities observed in sparsely vegetated regions because of the high friction *** the combined effect of the PM_(2.5)mass concentration and deposition velocity,the global mean dry deposition reached 0.47 g·m-^(2)·yr^(-1).Global vegetation absorbed 0.26 g·m-^(2)·yr^(-1)from PM_(2.5)pollution sources,contributing 54.98%of the total dry ***,vegetation-related dry deposition was high in the Amazon,Central Africa and East China due to dense vegetation coverage or serious ***,the increasing trends were mainly in Central Africa and India because of worsening air *** results of this study helped to clarify the impact of vegetation on air pollution,which supported related land management and planning for air quality improvement.