【作者】 秦世广；

【导师】 汤洁；

【作者基本信息】 中国气象科学研究院 ， 大气物理与大气环境， 2001， 硕士

【摘要】 本论文工作包含了北京上甸子区域大气本底站、四川温江为期一年、浙江临安区域大气污染监测站为期半年的大气黑碳气溶胶观测实验。利用该实验数据及青海瓦里关大气基准现象台黑碳气溶胶长期监测数据和1998年拉萨气溶胶实验观测数据，结合气象观测资料，本论文研究分析了我国不同地区大气黑碳气溶胶浓度变化特征。利用浓度频数分布和对数正态分布拟合函数分析了不同地区大气黑碳气溶胶本底浓度水平，其中，瓦里关山黑碳本底浓度最小，为73ng·m^-3，温江黑碳本底浓度最大，为2849ng·m^-3。近十年黑碳气溶胶监测结果显示：瓦里关山黑碳浓度有明显增长的趋势。对比已有的我国黑碳气溶胶分布模式计算结果，除上甸子黑碳浓度模式模拟结果同实测结果比较近似外，其它地区模拟结果和实测结果还有一定的差异，我国黑碳浓度分布更为准确的计算还需要模式的改进以及对我国黑碳气溶胶源排放因子和源排放清单加以进一步的研究。后向轨迹及轨迹簇分析结果显示大气远距离输送过程对瓦里关山黑碳气溶胶浓度有很大影响，当受到偏东方向气流控制时，黑碳浓度较大。更多还原

【Abstract】 Black carbon concentration observation was made continuously at Shangdianzi regional GAW (Global Atmosphere Watch) station and Wenjiang site for one year, at Lin抋n regional GAW station for half year. Two other data sets were obtained from the long-term routine measurement at Mt. Waliguan Global GAW Observatory and the Lhasa experiment in 1998. The variation characteristics of black carbon at these five sites were analyzed combining with meteorological data of theirs. The background concentrations of black carbon were defined by using the statistical method and the lognormal curve fitting for these sites. The results showed that the background concentration of black carbon at Mt. Waliguan was lowest with a value of 73 ngm3, the one at Wenjiang site highest with a value of 2849 ngm3. The analysis of the Mt. Waliguan data set showed a long term increasing trend since mid nineties. The comparison of observation data with the existing model simulation result showed relative good agreement for Shangdianzi site but for other four sites. It may suggest the further investigation on the emission inventory/emission factor of black carbon for the more accurate modeling is necessary. Back trajectory analysis by using the cluster grouping method showed the obvious influence of long distance transportation on the variation of black carbon concentration at Mt. Waliguan, especially for the high episode periods in easterly flow.更多还原