本底站和城区站CO浓度变化特征和源贡献

发布时间：2018-06-07 00:07

  本文选题：数值模拟 + 一氧化碳　； 参考：《中国环境科学》2016年10期

【摘要】：采用FLEXPART大气扩散模式结合清单的模拟方法,通过与2010年上甸子大气本底站和城区海淀宝联站的CO观测浓度的比较,研究了北京地区CO浓度变化特征,并统计分析了各类排放源的贡献差异.研究结果表明:上甸子站和宝联站CO模拟浓度与观测浓度的变化趋势基本一致,相关系数分别优于0.74和0.45;与观测值相比,两站模拟浓度值偏低,模式对观测浓度峰值模拟能力有限.利用不同源清单模拟获得的同一站点CO浓度值相近,但交通、工业、民用等分类排放源对CO模拟浓度的贡献差异明显.与INTEX-B2006清单相比,利用MEIC2010排放清单模拟的宝联站交通与工业排放贡献的占比小、民用排放占比大;而上甸子站交通排放贡献的占比小,民用与工业排放的贡献占比大.因此,利用FLEXPART模式结合清单的模拟方法对CO浓度具有较好的模拟能力,可以较为准确地反映区域大气本底站和城区站CO浓度的变化特征;各类排放源对模拟浓度的贡献不仅受到测站所在地的局地排放源影响,更与影响测站的印痕区域的排放源密切相关.
[Abstract]:By using the FLEXPART atmospheric diffusion model combined with the inventory simulation method, the variation characteristics of CO concentration in Beijing are studied by comparing the CO concentrations observed in 2010 between the Shangdian atmospheric background station and the Haidian Baolian station in the urban area. The contribution of various emission sources was analyzed statistically. The results show that the simulated CO concentration in Shangdian and Baolian stations is basically consistent with the observed concentration, and the correlation coefficient is better than 0.74 and 0.45, respectively. The model has a limited ability to simulate the peak values of observed concentrations. The CO concentration of the same station obtained by using different homology inventory simulation is similar, but the contribution of classified emission sources such as traffic, industry and civil to the simulated CO concentration is significant. Compared with INTEX-B2006 inventory, the contribution of traffic and industrial emission in Baolian station simulated by MEIC2010 emission inventory is smaller than that in civil emission, while the contribution of traffic emission in Shangdian station is small, and the contribution of civil and industrial emissions is larger. Therefore, the simulation method of FLEXPART model combined with inventory has a better ability to simulate CO concentration, which can accurately reflect the variation characteristics of CO concentration in regional atmosphere background stations and urban stations. The contribution of various emission sources to the simulated concentration is not only affected by the local emission sources in the site of the station, but also closely related to the emission sources in the imprint area of the station.
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本文编号：1988729