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Abstract: vehicle emissions are a major source of air pollution in urban areas. The impact on urban air quality could be reduced if the trends of vehicle emissions are well understood. In the present study, the real-world emissions of vehicles were measured using a remote sensing system at five sites in Hangzhou, China from February 2004 to August 2005. More than 48000 valid gasoline powered vehicle emissions of carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxide (NO) were measured. The results show that petrol vehicle fleet in Hangzhou has considerably high CO emissions, with the average emission concentration of 2.71%±0.02%, while HC and NO emissions are relatively lower, with the average emission concentration of (153.72±1.16)×10⁻⁶ and (233.53±1.80)×10⁻⁶, respectively. Quintile analysis of both average emission concentration and total amount emissions by model year suggests that in-use emission differences between well maintained and badly maintained vehicles are larger than the age-dependent deterioration of emissions. In addition, relatively new high polluting vehicles are the greatest contributors to fleet emissions with, for example, 46.55% of carbon monoxide fleet emissions being produced by the top quintile high emitting vehicles from model years 2000~2004. Therefore, fleet emissions could be significantly reduced if new highly polluting vehicles were subject to effective emissions testing followed by appropriate remedial action.

[1] Ashbaugh, L.L., Lawson, D.R., Bishop, G.A., Guenther, P.L., Stedman, D.H., Stephens, R.D., Groblicki, P.J., Parikh, J.S., Johnson, B.J., Haung, S.C., 1992. On-road Remote Sensing of Carbon Monoxide and Hydrocarbon Emissions during Several Vehicle Operating Conditions. Presented at Environmental Source Controls, Phoenix, AZ.

[2] Bishop, G.A., Stedman, D.H., Hutton, R.B., Bohren, L., Lacey, N., 2000. Drive-by motor vehicle emissions: immediate feedback in reducing air pollution. Environmental Science and Technology, 34(6):1110-1116.

[3] Bishop, G.A., Williams, M.J., Burgard, D.A., Stedman, D.H., 2003. On-road Remote Sensing of Automobile Emissions in the Chicago Area: Year 5, September 2002. Final Report to the Coordinating Research Council, Inc., USA.

[4] Burgard, D.A., Bishop, G.A., Williams, M.J., Stedman, D.H., 2003. On-road Remote Sensing of Automobile Emissions in the Denver Area: Year 4, January 2003. Report prepared for the Coordinating Research Council under Contract E-23-4. University of Denver, Denver, CO. Http://www.feat.biochem.du.edu/reports.html.

[5] Chan, T.L., Ning, Z., Leung, C.W., Cheung, C.S., Hung, W.T., Dong, G., 2004. On-road remote sensing of petrol vehicle emissions measurement and emission factors estimation in Hong Kong. Atmospheric Environment, 38(14):2055-2066.

[6] Deng, S.X., Chen, J., Li, B.C., 2000. Emission factors of CO, HC and NO_x from motor vehicles on urban main road in China. China Environmental Science, 20(1):82-85 (in Chinese).

[7] Department Research Center for the State Council, Tsinghua University Department of Environmental Science & Engineering, China Automotive Technology and Research Center, Chinese Research Academy of Environmental Science, 2001. Background Report: Vehicle Fuel Economy in China. Http://www.efchina.org/resources.cfm.

[8] Gertler, A.W., Sagebiel, J.C., Wittorff, D.N., Pierson, W.R., Dippel, W.A., Freeman, D., Sheetz, L., 1997. Vehicle Emissions in Five Urban Tunnels. CRC Final Report No. E-5. Desert Research Institute, Reno, Nevada 89506.

[9] Hao, J.M., He, D.Q., Ye, W., Fu, L.X., He, K.B., 2000. A study of the emission and concentration distribution of vehicular pollutants in the urban area of Beijing. Atmospheric Environment, 34(3):453-465.

[10] Heywood, J.B., 1988. Internal Combustion Engine Fundamental. McGraw-Hill, New York, p.352-480.

[11] Kouridis, C., Ntziachristos, L., Samaras, Z., 2000. COPERT III-Computer Programme to Calculate Emissions from Road Transport. User’s Manual (Version 2.1). Technical Report No. 50. European Environment Agency, Copenhagen.

[12] Pierson, W.R., Gertler, A.W., Robinson, N.F., Sagebiel, J.C., Zielinska, B., Bishop, G.A., Stedman, D.H., Zweidinger, R.B., Ray, W.D., 1996. Real-world automotive emissions―summary of studies in the Fort McHenry and Tuscarora Mountain Tunnels. Atmospheric Environment, 30(12):2233-2256.

[13] Pokharel, S.S., Bishop, G.A., Stedman, H.D., 2002. On-road Remote Sensing of Automobile Emissions in the Denver Area: Year 3. Report Prepared for the Coordinating Research Council under Contract E-23-4. University of Denver, Denver, CO. Http://www.feat.biochem.du.edu/reports.html.

[14] Pokharel, S.S., Bishop, G.A., Stedman, H.D., 2004. An on-road motor vehicle emissions inventory for Denver: an efficient alternative to modeling. Atmospheric Environment, 36(2002):5177-5184.

[15] Revitt, D.M., Muncaster, G.M., Hamilton, R.S., 1999. Trends in hydrocarbon fleet emissions at four UK highway sites. The Science of the Total Environment, 235(1-3):91-99.

[16] SEPA (State Environmental Protection Administration of China), 2004. 2004 Annual Plenary Meeting of Joint Research Network on Vehicle Emission Control Technologies. Http://www.vecc-sepa.org.cn/index/sanguosifang/beijing-english%20chi.pdf.

[17] Singer, B.C., Harley, R.A., 1996. A fuel-based motor vehicle emission inventory. Journal of the Air and Waste Management Association, 46(1996):581-593.

[18] USCARB (US California Air Resources Board), 2002. Http://www.arb.ca.gov/msei/on-road/latest_version.htm.

[19] USEPA (US Environmental Protection Agency), 2003. Http://www.epa.gov/otaq/m6.htm.

[20] Wang, B.G., Zhang, Y.H., Wu, Z.W., Chen, H.Y., 2001. Tunnel test for motor vehicle emission factors in Guangzhou. Research of Environmental Sciences, 14(4):13-16 (in Chinese).

[21] Wenzel, T., 2003. Use of remote sensing measurements to evaluate vehicle emission monitoring programs: results from Phoenix, Arizona. Environmental Science & Policy, 6(2):153-166.

[22] Zhang, Y., Bishop, G.A., Stedman, D.H., 1994. Automobile emissions are statistically gamma-distributed. Journal of the Air and Waste Management Association, 28(1994):1370-1374.

[23] Zhang, Y., Stedman, D.H., Bishop, G.A., Beaton, S.P., Guenther, P.L., McVey, I.F., 1996. Enhancement of remote sensing for mobile source nitric oxide. Journal of the Air and Waste Management Association, 46(1996):25-29.