DOI: 10.1016/j.atmosenv.2014.03.020
Scopus记录号: 2-s2.0-84897065994
论文题名: Network monitoring of speciated vs. total non-methane hydrocarbon measurements
作者: Chen S ; -P ; , Liao W ; -C ; , Chang C ; -C ; , Su Y ; -C ; , Tong Y ; -H ; , Chang J ; S ; , Wang J ; -L
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 90 起始页码: 33
结束页码: 42
语种: 英语
英文关键词: NMHC
; PAMS
; VOC
Scopus关键词: Air quality
; Environmental Protection Agency
; Ethylene
; Propylene
; Volatile organic compounds
; Chemical compositions
; Compositional information
; Network Monitoring
; NMHC
; Non-methane hydrocarbons
; PAMS
; Petrochemical industry
; Photochemical assessment monitoring stations
; Methane
; ethylene
; hydrocarbon
; propylene
; total non methane hydrocarbon
; unclassified drug
; volatile organic compound
; air quality
; environmental protection
; ethylene
; industrial location
; nonmethane hydrocarbon
; petrochemical industry
; pollution monitoring
; speciation (chemistry)
; synchrony
; traffic emission
; urban pollution
; volatile organic compound
; air pollution control
; air quality
; air quality station
; ambient air
; article
; chemical composition
; chemical structure
; comparative study
; environmental monitoring
; petrochemical industry
; photochemical assessment monitoring station
; priority journal
; Taiwan
; time series analysis
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The total non-methane hydrocarbon (TNMHC) level in the atmosphere is defined as the level of total hydrocarbons minus the level of methane. TNMHC observations are made in selected air quality stations (AQS) of Environmental Protection Agency (EPA) across Taiwan. The AQS network is also complemented by a network of photochemical assessment monitoring stations (PAMS) to provide hourly observations of 56 speciated non-methane hydrocarbons (NMHCs). In this study, the relationship between the AQS and PAMS TNMHC values was cross-examined for the period of 2007-2011 at four sites that conducted both types of measurements. Although the two observations differ in their methods of collection, the variations in the two datasets showed high synchronicity. However, because some of the NMHCs were missed in the summation of 56 species, the PAMS TNMHC values were consistently lower than those of the AQS TNMHC by an average of 30%.Although total hydrocarbon (THC) instruments can provide instantaneous TNMHC mixing ratios (by subtracting methane) to approximate the levels of volatile organic compounds (VOCs), they lack speciated information, which is invaluable to establishing the link between the observation site and specific source influences. In contrast, PAMS observations with speciation information can be used to complement this deficiency. Examples of this complementarity were illustrated by comparing four common sites, with two mainly affected by urban/traffic emissions and two primarily affected by industrial emissions. The chemical composition of the air samples varied significantly between the four sites. Ethylene and propylene were found to be prominent at the two industrial sites, linking these samples strongly to the petrochemical industry nearby. This compositional signature was even more pronounced for the sample peak values. These findings suggest that network monitoring of TNMHCs may not be sufficient, and the lack of compositional information can be complemented by the more elaborate monitoring means such as PAMS deployed only at critical sites to provide both area coverage and speciation knowledge. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80853
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Chemistry, National Central University, Taiwan; Research Center for Environmental Changes, Academia Sinica, Taiwan; Environmental Simulation Co. LTD., Taiwan; Institute of Atmospheric Physics, National Central University, Taiwan
Recommended Citation:
Chen S,-P,, Liao W,et al. Network monitoring of speciated vs. total non-methane hydrocarbon measurements[J]. Atmospheric Environment,2014-01-01,90