Dissecting the contributions of organic nitrogen aerosols to global atmospheric nitrogen deposition and implications for ecosystems  

作　　者：Yumin Li Tzung-May Fu Jian Zhen Yu Xu Yu Qi Chen Ruqian Miao Yang Zhou Aoxing Zhang Jianhuai Ye Xin Yang Shu Tao Hongbin Liu Weiqi Yao 

机构地区：[1]Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China [2]Guangdong Provincial Observation and Research Station for Coastal Atmosphere and Climate of the Greater Bay Area,Southern University of Science and Technology,Shenzhen 518055,China [3]Division of Environment and Sustainability,Hong Kong University of Science and Technology,Hong Kong 999077,China [4]National Center for Applied Mathematics Shenzhen,Shenzhen 518055,China [5]Department of Chemistry,Hong Kong University of Science and Technology,Hong Kong 999077,China [6]State Key Joint Laboratory of Environmental Simulation and Pollution Control,International Joint Laboratory for Regional Pollution Control,College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China [7]Frontier Science Center for Deep Ocean Multispheres and Earth System and Physical Oceanography Laboratory,Ocean University of China,Qingdao 266100,China [8]College of Oceanic and Atmospheric Sciences,Ocean University of China,Qingdao 266100,China [9]Department of Ocean Science,Hong Kong University of Science and Technology,Hong Kong 999077,China [10]Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China

出　　处：《National Science Review》2023年第12期118-130,共13页国家科学评论（英文版）

基　　金：mainly supported by the National Natural Science Foundation of China(42325504 and 41975158);supported by the Guangdong Basic and Applied Basic Research Foundation(2020B1515130003);the Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks(ZDSYS20220606100604008);the Shenzhen Science and Technology Program(JCYJ20220818100611024 and KQTD20210811090048025);the Guangdong University Research Project Science Team(2021KCXTD004);the Guangdong Province Major Talent Program(2019CX01S188);the Hong Kong Research Grant Council(16307820)。

摘　　要：Atmospheric deposition of particulate organic nitrogen(ON_(p))is a significant process in the global nitrogen cycle and may be pivotally important for N-limited ecosystems.However,past models largely overlo oked the spatial and chemical inhomogeneity of atmospheric ON_(p)and were thus deficient in assessing global ON_(p)impacts.We constructed a comprehensive global model of atmospheric gaseous and particulate organic nitrogen(ON),including the latest knowledge on emissions and secondary formations.Using this model,we simulated global atmospheric ON_(p)abundances consistent with observations.Our estimated global atmospheric ON deposition was 26 Tg N yr^(-1),predominantly in the form of ON_(p)(23 Tg N yr^(-1))and mostly from wildfires(37%),oceans(22%)and aqueous productions(17%).Globally,ON_(p)contributed as much as 40%to 80%of the total N deposition downwind of biomass-burning regions.Atmospheric ON_(p)deposition thus constituted the dominant external N supply to the N-limited boreal forests,tundras and the Arctic Ocean,and its importance maybe amplified in a future warming climate.

关 键 词：organic nitrogen aerosol secondary organic nitrogen biomass burning 

分 类 号：X513[环境科学与工程—环境工程]