Significant chlorine emissions from biomass burning affect the long-term atmospheric chemistry in Asia  

作　　者：Di Chang Qinyi Li Zhe Wang Jianing Dai Xiao Fu Jia Guo Lei Zhu Dongchuan Pu Carlos A.Cuevas Rafael P.Fernandez Weigang Wang Maofa Ge Jimmy C.H.Fung Alexis K.H.Lau Claire Granier Guy Brasseur Andrea Pozzer Alfonso Saiz-Lopez Yu Song Tao Wang 

机构地区：[1]Atmospheric Chemistry Department,Max Planck Institute for Chemistry,Mainz 55128,Germany [2]Department of Atmospheric Chemistry and Climate,Institute of Physical Chemistry Blas Cabrera,CSIC,Madrid 28006,Spain [3]Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China [4]Environment Research Institute,Shandong University,Qingdao 266000,China [5]Division of Environment and Sustainability,The Hong Kong University of Science and Technology,Hong Kong 999077,China [6]Environmental Modeling Group,Max Planck Institute for Meteorology,Hamburg 20146,Germany [7]Institute of Environment and Ecology,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518000,China [8]Environmental Central Facility,Institute for the Environment,The Hong Kong University of Science and Technology,Hong Kong 999077,China [9]Atmospheric Chemistry Modeling&Remote Sensing Research Group,Southern University of Science and Technology,Shenzhen 518055,China [10]Institute for Interdisciplinary Science(ICB),National Research Council(CONICET),FCEN-UNCuyo,Mendoza 5501,Argentina [11]Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [12]NOAA Chemical Sciences Laboratory/CIRES,University of Colorado,Boulder,CO 80305,USA [13]Laboratoire d’Aerologie,CNRS,University of Toulouse UPS,Toulouse 31062,France [14]Atmospheric Chemistry Observation&Modeling Laboratory,National Center for Atmospheric Research,Boulder,CO 80305,USA [15]State Key Joint Laboratory of Environmental Simulation and Pollution Control,Department of Environmental Science,Peking University,Beijing 100871,China

出　　处：《National Science Review》2024年第9期207-216,共10页国家科学评论（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC)(42122062 and 91744204);the Research Grants Council of Hong Kong Special Administrative Region(T24/504/17-N,16209022 and 16201623);funded by the European Research Council Executive Agency under the European Union’s Horizon 2020 Research and Innovation Programme(ERC-2016-COG 726349 CLIMAHAL to AS-L);provided by the Climate Simulation Laboratory at NCAR’s Computational and Information Systems Laboratory(CISL),sponsored by the NSF.

摘　　要：Biomass burning(BB)is a major source of trace gases and particles in the atmosphere,influencing air quality,radiative balance,and climate.Previous studies have mainly focused on the BB emissions of carbon and nitrogen species with less attention on chlorine.Reactive chlorine chemistry has significant effects on atmospheric chemistry and air quality.However,quantitative information on chlorine emissions from BB,particularly the long-term trend and associated atmospheric impacts,is limited both on regional and global scales.Here,we report a long-term(2001-2018)high-resolution BB emission inventory for the major chlorine-containing compounds(HCl,chloride,and CH_(3)Cl)in Asia based on satellite observations.We estimate an average of 730 Gg yr^(-1)chlorine emitted from BB activ ity in A sia,w ith China contributing the largest share at 24.2%(177 Gg yr^(-1)),followed by Myanmar at 18.7%and India at 18.3%.Distinct seasonal patterns and significant spatial and interannual variability are observed,mainly driven by human-mediated changes in agricultural activity.By incorporating the newly developed chlorine emission inventory into a global chemistry-climate model(CAM-Chem),we find that the BB-chlorine emissions lead to elevated levels of HCl and CH_(3)Cl(monthly average up to 2062 and 1421 parts per tri l lion by volume(pptv),respectively),subsequently resulting in noticeable changes in oxidants(up to 3.1%in O_(3)and 17%in OH radicals).The results demonstrate that BB is not only a significant source of air pollutants but also of oxidants,suggesting a larger role of BB emissions in the atmospheric chemistry and oxidation process than previously appreciated.In light of the projected increase in BB activity toward the end of the century and the extensive control of anthropogenic emissions worldwide,the contribution of BB emissions may become fundamental to air quality composition in the future.

关 键 词：biomass burning emission chlorine emission inventory tropospheric halogen chemistry atmospheric oxidants CAM-Chem model 

分 类 号：X51[环境科学与工程—环境工程]