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Anthropogenic Effects on biogenic Secondary organic Aerosol Formation

Advances in Atmospheric Sciences 2021年第7期38卷 1053-1084页

作者： Li XU Lin DU Narcisse T.TSONA Maofa GE Environment Research Institute Shandong UniversityQingdao 266237China State Key Laboratory for Structural Chemistry of Unstable and Stable Species Chinese Academy of Sciences Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

Anthropogenic emissions alter biogenic secondary organic aerosol(SOA)formation from naturally emitted volatileorganic compounds(BVOCs).We review the major laboratory and field findings with regard to effects of anthropogenicpollutants(NO_(x),anthropogenic aerosols,SO_(2),NH_(3))on biogenic SOA ***_(x) participate in BVOC oxidationthrough changing the radical chemistry and oxidation capacity,leading to a complex SOA composition and yield sensitivitytowards NO_(x) level for different or even specific hydrocarbon *** aerosols act as an importantintermedium for gas-particle partitioning and particle-phase reactions,processes of which are influenced by the particlephase state,acidity,water content and thus associated with biogenic SOA mass ***_(2)modifies biogenic SOAformation mainly through sulfuric acid formation and accompanies new particle formation and acid-catalyzedheterogeneous *** new SO_(2)-involved mechanisms for organosulfate formation have also been ***_(3)/amines,as the most prevalent base species in the atmosphere,influence biogenic SOA composition and modify theoptical properties of *** response of SOA formation behavior to these anthropogenic pollutants varies amongdifferent BVOCs *** on anthropogenic-biogenic interactions in some areas of China that aresimultaneously influenced by anthropogenic and biogenic emissions are *** on this review,somerecommendations are made for a more accurate assessment of controllable biogenic SOA formation and its contribution tothe total SOA *** study also highlights the importance of controlling anthropogenic pollutant emissions witheffective pollutant mitigation policies to reduce regional and global biogenic SOA formation.

关键词： biogenic volatile organic compounds anthropogenic pollutants secondary organic aerosol anthropogenic-biogenic interactions China

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Nitrogen addition inhibits total monoterpene emissions in subtropical forest floor of South China

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Soil Ecology Letters 2021年第1期3卷 63-72页

作者： Xingran Huang Lili Zheng Pingping Guo Zhigang Yi Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China Minjiang River Estuary Wetland National Nature Reserve Administrative Office Fuzhou 350002China

Monoterpenes(MTs)play crucial roles not only in atmospheric chemistry and global climate change but also in soil processes and soil *** nitrogen(N)deposition can influence soil microbial community and litter decomposition,and consequently alters MT fluxes from forest floors and ***,the responses of soil and litter MT to increased N deposition remain poorly understood and the influences of N addition are sometimes *** the present study,static chambers were placed in masson pine forest(PF)and in monsoon evergreen broad-leaf forest(BF)at Dinghushan,subtropical *** preconcentrator-GC–MS was used to analyze the effect of N addition on MT fluxes from the forest floors and *** results showed that under control treatment(without N addition),the total MT emission rates were 279.90±137.17 and 102.70±45.36 pmol m^(–2)s^(–1) in the PF and BF floors,respectively,withα-pinene being the largest MT species in the PF and limonene in the BF.α-pinene andβ-pinene emission rates decreased significantly in both forest floors after N addition,whereas a diverse trend was found for limonene and camphene in the PF ***,some MT fluxes showed significant negative correlations with soil respiration and soil *** was important in MT fluxes from forest floors and its emission rates were enhanced by N ***,different MT response to elevated N was found between the forest floor and *** study indicated that the elevated N deposition in the future would inhibit the MT emissions from the subtropical forest floor.

关键词： biogenic volatile organic compounds Dinghushan Biosphere Reserve Forest floor Little Monoterpene Nitrogen deposition

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