杭州市大气过氧乙酰基硝酸酯(PAN)及其同系物PPN和MPAN观测与模拟研究

与O3类似，大气PAN及其同系物PPN和MPAN亦是对流层大气光化学污染的重要组分并对大气环境和人体健康产生负面影响。目前，我国缺乏PANs同步观测与模拟研究，且已有的PAN研究多集中在京津冀地区，而在光化学污染较严重的长三角地区鲜有报道。在申请人前期研究的基础上，本项目拟对杭州市大气PAN、PPN、MPAN、O3及其前体物VOCs和相关要素开展同步在线观测，获得杭州市大气PANs和O3等气态污染物浓度水平和季节变化特征，并基于后向轨迹模型与潜在源区分析区分不同季节区域传输与局地光化学过程的影响，通过多元线性回归量化大气PAN与PPN、MPAN的相关关系继而估算人为源和自然源VOCs在大气PAN和O3局地光化学生成过程中的具体贡献，并利用基于观测资料的OBM模式进一步研究大气PANs和O3的局地光化学过程，甄别出各自的关键VOCs物种，为制定科学合理的光化学污染控制措施提供理论依据。

Similar with O3, atmospheric PAN and its homologues such as PPN and MPAN are the important components of atmospheric photochemical pollution in the troposphere and they both have harmful effects on atmospheric environment and human health. At present, there are lack of the related simulations and observations related to PANs in China. The existing studies of PAN were mostly conducted in the BTH areas. In contrast, there are few studies implemented in the Yangtze River Delta region where it is suffering from serious photochemical pollution. On the basis of our previous studies, we intend to conduct the simultaneous measurements of atmospheric gaseous pollutants such as PANs, O3, and VOCs and the other related parameters, to obtain their concentration levels and seasonal variations in urban Hangzhou. With the aid of HYSPLIT and PSCF analysis, we will distinguish the effect of regional transport and local photochemical formation on PANs and O3 in the four seasons, and then quantify the relationship between PAN and PPN, MPAN. After that, we could estimate their respective contribution of AVOCs and BVOCs to the formation of PANs and O3, respectively. Finally, we will further investigate the local photochemical processes of PANs and O3 and point out their crucial precursors during four seasons by using OBM model. This study could provide the scientific basis for policy maker to conduct an effective emission control measures for air pollution.