中文摘要：

利用本地化修正的MOVES模型结合实地调研数据,测算了西安市机动车排放清单,并对各种污染物的排放分担率进行了分析。结果表明：2012年西安市机动车的PM2.5、PM10、NOx、总碳氢化合物（THC）、CO、挥发性有机物（VOCs）、NH3和SO2排放总量分别为1 890.48、2 668.89、40 847.75、19 413.30、217 103.04、15 244.86、539.76、2 087.50 t;中型货车和重型货车是PM2.5、PM10和NOx的主要贡献者,小型客车和摩托车是THC、CO和VOCs的主要贡献者,小型客车是NH3的主要贡献者,小型客车与重型货车对SO2的排放分担率均较高;柴油车对PM2.5、PM10、NOx和SO2的排放分担率高于汽油车,而汽油车对THC、CO、VOCs和NH3的分担率则高于柴油车;CO在冬季排放最多,其余污染物的排放均在夏季最多,但污染物的季节变化总体上不明显。

英文摘要：

The MOVES model with localized modification and vehicle data collected in Xi＇an were used to calculate vehicle emission inventory in this city. The contribution rates for various pollutants were also analyzed. The results showed that the total vehicle emissions of PM2.5,PM10,NOx,total hydrocarbon（ THC）,CO,volatile organic compounds（ VOCs）,NH3 and SO2in 2012 were 1 890. 48,2 668. 89,40 847. 75,19 413. 30,217 103. 04,15 244. 86,539. 76 and 2 087. 50 t.The middle and heavy duty trucks were main contributors to PM2.5,PM10 and NOx. The small passenger car and motorcycle were main contributors to THC,CO and VOCs. Meanwhile,the small passenger car had the highest contribution rate to NH3,and its contribution to SO2 was also the highest,followed by the heavy duty truck. The contribution rates of diesel vehicle to PM2.5,PM10,NOxand SO2 were higher than gasoline vehicle,but gasoline vehicle had higher contribution rates to THC,CO,VOCs and NH3. For different seasons,CO emission in winter was the highest,while other pollutant emissions in summer were the highest. However,the seasonal variation of pollutants was generally not obvious.