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DOI	10.5194/acp-21-8709-2021
	Insights into seasonal variation of wet deposition over southeast Asia via precipitation adjustment from the findings of MICS-Asia III
	Itahashi S.; Ge B.; Sato K.; Wang Z.; Kurokawa J.; Tan J.; Huang K.; Fu J.S.; Wang X.; Yamaji K.; Nagashima T.; Li J.; Kajino M.; Carmichael G.R.; Wang Z.
发表日期	2021
ISSN	1680-7316
起始页码	8709
结束页码	8734
卷号	21 期号:11
英文摘要	Asia has attracted research attention because it has the highest anthropogenic emissions in the world, and the Model Inter-Comparison Study for Asia (MICS-Asia) phase III was carried out to foster our understanding of the status of air quality over Asia. This study analyzed wet deposition in southeast Asian countries (Myanmar, Thailand, Lao People's Democratic Republic (PDR), Cambodia, Vietnam, the Philippines, Malaysia, and Indonesia) with the aim of providing insights into the seasonal variation of wet deposition. Southeast Asia was not fully considered in MICS-Asia phase II due to a lack of observational data; however, the analysis period of MICS-Asia III, namely the year 2010, is covered by ground observations of the Acid Deposition Monitoring Network in East Asia (EANET), and the coordinated simulation domain was extended to cover these observation sites. The analyzed species are wet depositions of S (sulfate aerosol, sulfur dioxide (SOspan classCombining double low ), and sulfuric acid (Hspan classCombining double low SOspan classCombining double low )), N (nitrate aerosol, nitrogen monoxide (NO), nitrogen dioxide (NO2), and nitric acid (HNO3)), and A (ammonium aerosol and ammonia (NH3)). The wet deposition simulated with seven models driven by a unified meteorological model in MICS-Asia III was used with the ensemble approach, which effectively modulates the differences in performance among models. By comparison with EANET observations, although the seven models generally captured the wet depositions of S, N, and A, there werespan idCombining double low line"page8710"/> difficulties capturing these in some cases. Considering the model performance for ambient aerosol concentrations over southeast Asia, this failure of models is considered to be related to the difficulty in capturing the precipitation in southeast Asia, especially during the dry and wet seasons. Generally, meteorological fields overestimate the precipitation during the dry season, which leads to the overestimation of wet deposition during this season. To overcome this, a precipitation-adjusted approach that scaled the modeled precipitation to the observed value was applied, and it was demonstrated that the model performance was improved. Satellite measurements were also used to adjust for precipitation data, which adequately accounted for the spatiotemporal precipitation patterns, especially in the dry season. As the statistical scores were mostly improved by this adjustment, the estimation of wet deposition with precipitation adjustment was considered to be superior. To utilize satellite measurements, the spatial distribution of wet deposition was revised. Based on this revision, it was found that Vietnam, Malaysia, and Indonesia were upward corrected, and Myanmar, Thailand, Lao PDR, Cambodia, and the Philippines were downward-corrected; these corrections were up to ±40 %. The improved accuracy of precipitation amount was key to estimating wet deposition in this study. These results suggest that the precipitation-adjusted approach has the potential to obtain accurate estimates of wet deposition through the fusion of models and observations./ © Copyright:
语种	英语
scopus关键词	air quality; anthropogenic source; atmospheric pollution; carbon emission; precipitation (climatology); research work; satellite data; seasonal variation; temporal variation; wet deposition; Southeast Asia
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/246826
作者单位	Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI), Abiko, Chiba, 270-1194, Japan; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences (CAS), Beijing, 100029, China; Collage of Earth Science, University of Chinese Academy of Sciences, Beijing, 100049, China; Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences (CAS), Xiamen, 361021, China; Asia Center for Air Pollution Research (ACAP), 1182 Sowa, Nishi-ku, Niigata, Niigata, 950-2144, Japan; Research Institute for Applied Mechanics (RIAM), Kyushu University, Fukuoka, 816-8580, Japan; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, 55128, Germany; Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, TN 37996, United States; Department of Environmental Science and Engineeri...
推荐引用方式 GB/T 7714	Itahashi S.,Ge B.,Sato K.,et al. Insights into seasonal variation of wet deposition over southeast Asia via precipitation adjustment from the findings of MICS-Asia III[J],2021,21(11).
APA	Itahashi S..,Ge B..,Sato K..,Wang Z..,Kurokawa J..,...&Wang Z..(2021).Insights into seasonal variation of wet deposition over southeast Asia via precipitation adjustment from the findings of MICS-Asia III.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(11).
MLA	Itahashi S.,et al."Insights into seasonal variation of wet deposition over southeast Asia via precipitation adjustment from the findings of MICS-Asia III".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.11(2021).