气候变化领域集成服务门户(CCPortal): Comprehensive analyses of source sensitivities and apportionments of PM2.5 and ozone over Japan via multiple numerical techniques

CCPortal

DOI	10.5194/acp-20-10311-2020
	Comprehensive analyses of source sensitivities and apportionments of PM2.5 and ozone over Japan via multiple numerical techniques
	Chatani S.; Shimadera H.; Itahashi S.; Yamaji K.
发表日期	2020
ISSN	1680-7316
起始页码	10311
结束页码	10329
卷号	20 期号:17
英文摘要	Source sensitivity and source apportionment are two major indicators representing source receptor relationships, which serve as essential information when considering effective strategies to accomplish improved air quality. This study evaluated source sensitivities and apportionments of ambient ozone and PM2:5 concentrations over Japan with multiple numerical techniques embedded in regional chemical transport models, including a brute-force method (BFM), a high-order decoupled direct method (HDDM), and an integrated source apportionment method (ISAM), to update the source receptor relationships considering stringent emission controls recently implemented in Japan and surrounding countries. We also attempted to understand the differences among source sensitivities and source apportionments calculated by multiple techniques. While a part of ozone concentrations was apportioned to domestic sources, their sensitivities were small or even negative; ozone concentrations were exclusively sensitive to transport from outside Japan. Although the simulated PM2:5 concentrations were significantly lower than those reported by previous studies, their sensitivity to transport from outside Japan was still relatively large, implying that there has been a reduction in Japanese emissions, similar to surrounding countries including China, due to implementation of stringent emission controls. HDDM allowed us to understand the importance of the non-linear responses of PM2:5 concentrations to precursor emissions. Apportionments derived by ISAM were useful in distinguishing various direct and indirect influences on ozone and PM2:5 concentrations by combining with sensitivities. The results indicate that ozone transported from outside Japan plays a key role in exerting various indirect influences on the formation of ozone and secondary PM2:5 components. While the sensitivities come closer to the apportionments when perturbations in emissions are larger in highly nonlinear relationships including those between NH3 emissions and NHC4concentrations, NOx emissions and NO3 concentrations, and NOx emissions and ozone concentrations the sensitivities did not reach the apportionments because there were various indirect influences including other sectors, complex photochemical reactions, and gas aerosol partitioning. It is essential to consider non-linear influences to derive strategies for effectively suppressing concentrations of secondary pollutants. © 2020 American Institute of Physics Inc.. All rights reserved.
语种	英语
scopus关键词	air quality; atmospheric pollution; carbon emission; numerical model; ozone; particulate matter; policy implementation; pollutant transport; sensitivity analysis; Japan
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141120
作者单位	National Institute for Environmental Studies, Tsukuba, Ibaraki, 305-8506, Japan; School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan; Central Research Institute of Electric Power Industry, Abiko, Chiba, 270-1194, Japan; School of Maritime Sciences, Kobe University, Kobe, Hyogo, 658-0022, Japan
推荐引用方式 GB/T 7714	Chatani S.,Shimadera H.,Itahashi S.,et al. Comprehensive analyses of source sensitivities and apportionments of PM2.5 and ozone over Japan via multiple numerical techniques[J],2020,20(17).
APA	Chatani S.,Shimadera H.,Itahashi S.,&Yamaji K..(2020).Comprehensive analyses of source sensitivities and apportionments of PM2.5 and ozone over Japan via multiple numerical techniques.Atmospheric Chemistry and Physics,20(17).
MLA	Chatani S.,et al."Comprehensive analyses of source sensitivities and apportionments of PM2.5 and ozone over Japan via multiple numerical techniques".Atmospheric Chemistry and Physics 20.17(2020).