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	Performance characteristics of MM5-SMOKE-CMAQ for a summer photochemical episode in southeast England, United Kingdom
	Yu, Y.1,2; Sokhi, R. S.2; Kitwiroon, N.2; Middleton, D. R.3; Fisher, B.4
刊名	ATMOSPHERIC ENVIRONMENT
	2008-06-01
卷号	42期号:20页码:4870-4883
关键词	model evaluation CMAQ PM2.5 ozone UK
ISSN号	1352-2310
DOI	10.1016/j.atmosenv.2008.02,051
通讯作者	Yu, Y.(yyuds@yahoo.co.uk)
英文摘要	In this study a modelling system consisting of Mesoscale Model (MM5), Sparse Matrix Operator Kernel Emissions (SMOKE) and Community Multiscale Air Quality (CMAQ) model has been applied to a summer photochemical period in southeast England, UK. Ozone (03), nitrogen dioxide (NO,) and particulate matter (PM2.5) concentrations modelled with different horizontal grid resolutions (9 and 3 km) were evaluated against available ground-level observations from the UK Automatic Urban and Rural Network (AURN) and London Air Quality Network (LAQN) for the period of 24-28 June 2001 with a focus on 03 predictions. This effort, which represents the first comprehensive performance evaluation of the modelling system over a UK domain, reveals that CMAQ's ability to reproduce surface 03 observations varies with 03 concentrations. It underpredicts 03 mixing ratios on high-O-3 days and overpredicts the maximum and minimum hourly 03 values for most low-O-3 days. Model sensitivity analysis with doubled anthropogenic NO., or volatile organic compounds (VOC) emissions and analysis of the daylightaveraged levels Of OX (SUM Of 03 and NO2) as a function of NO, revealed that the undereprediction of peak 03 concentrations on high-O-3 days is caused by the underprediction of regional contribution and to a lesser extent local production, which might be related to the underestimation of European emissions in EMEP inventory and the lacked reactivity of the modelled atmosphere. CMAQ systematically underpredicts hourly NO2 mixing ratios but captures the temporal variations. The normalized mean bias for hourly NO2, although much larger than that for 03, falls well within the generally accepted range of -20% to -50%. CMAQ with both resolutions (9 and 3 km) significantly underpredicts PM2.5 mass concentrations and fails to reproduce its temporal variations. While model performance for 03 and PM2.5 are not very sensitive to model grid resolutions, a better agreement between modelled and measured hourly NO2 mixing ratios was achieved with higher resolution. Further investigation into the uncertainties in meteorological input, uncertainties in emissions, as well as representation of physical and chemical processes (e.g. chemical mechanism) in the model is needed to identify the causes for the discrepancies between observations and predictions. (c) 2008 Elsevier Ltd. All rights reserved.
收录类别	SCI
WOS关键词	AIR-QUALITY MODELS ; OZONE ; MM5-CMAQ ; SCALE ; SIMULATION ; EMISSIONS ; OXIDANTS ; EUROPE ; CMAQ ; UK
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000257783700005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2556040
专题	寒区旱区环境与工程研究所
通讯作者	Yu, Y.
作者单位	1.Chinese Acad Sci, Lab Climate Environm & Disasters Western China, Cold & Arid Reg Environm & Engn Inst, Lanzhou 730000, Gansu, Peoples R China 2.Univ Hertfordshire, Ctr Atmospher & Instrumentat Res CAIR, Hatfield AL10 9AB, Herts, England 3.Met Off, Exeter EX1 3PB, Devon, England 4.Environm Agcy, Reading RG1 8DQ, Berks, England
推荐引用方式 GB/T 7714	Yu, Y.,Sokhi, R. S.,Kitwiroon, N.,et al. Performance characteristics of MM5-SMOKE-CMAQ for a summer photochemical episode in southeast England, United Kingdom[J]. ATMOSPHERIC ENVIRONMENT,2008,42(20):4870-4883.
APA	Yu, Y.,Sokhi, R. S.,Kitwiroon, N.,Middleton, D. R.,&Fisher, B..(2008).Performance characteristics of MM5-SMOKE-CMAQ for a summer photochemical episode in southeast England, United Kingdom.ATMOSPHERIC ENVIRONMENT,42(20),4870-4883.
MLA	Yu, Y.,et al."Performance characteristics of MM5-SMOKE-CMAQ for a summer photochemical episode in southeast England, United Kingdom".ATMOSPHERIC ENVIRONMENT 42.20(2008):4870-4883.

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