南京及周边黑碳气溶胶对臭氧影响的观测分析和数值模拟  

Observation alanalysis and numerical simulation of effect of black carbon on ozone in Nanjing and its surrounding areas

作　　者：朱彬[1,2] 智利蓉 卢文 高晋徽 侯雪伟[1,2] ZHU Bin;ZHI Lirong;LU Wen;GAO Jinhui;HOU Xuewei(Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Key Laboratory of Meteorological Disaster,Ministry of Education(KLME),Nanjing University of Information Science and Technology,Nanjing 210044,China;Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,Nanjing University of Information Science and Technology,Nanjing 210044,China;Sichuan Provincial Key Laboratory of Plateau Atmosphere and Environment,School of Atmospheric Science,Chengdu University of Information Engineering,Chengdu 610225,China)

机构地区：[1]南京信息工程大学气象灾害预报预警与评估协同创新中心/气象灾害教育部重点实验室,江苏南京210044 [2]南京信息工程大学中国气象局气溶胶与云降水重点开放实验室,江苏南京210044 [3]成都信息工程大学大气科学学院高原大气与环境四川省重点实验室,四川成都610225

出　　处：《大气科学学报》2021年第4期626-635,共10页Transactions of Atmospheric Sciences

基　　金：国家重点研发计划项目(2016YFA0602003);国家自然科学基金资助项目(41605096,41575148)。

摘　　要：利用南京地面站点2016—2017年黑碳气溶胶(Black Carbon,BC)和臭氧(O_(3))逐小时观测资料,对比分析了不同季节BC与近地面O_(3)的关系。结果表明,高BC(高于平均值)影响下的O_(3)质量浓度值明显比低BC(低于平均值)影响下的O_(3)质量浓度值低,这种抑制作用在秋冬季明显高于春夏季,且BC与O_(3)的负相关性在秋冬季显著高于春夏季,而PM_(2.5)与O_(3)的负相关性不显著。利用WRF-Chem模式,对2017年12月个例开展BC反馈效应对O_(3)影响的数值模拟,结果再次证实BC对O_(3)存在负反馈影响。其影响机制是:BC可通过抑制边界层发展,使近地面NO_(x)积聚,从而减少臭氧的化学生成(VOCs控制区);BC可通过抑制边界层垂直湍流交换,减少边界层上部高O_(3)向下的湍流输送,从而减少近地面O_(3);BC可通过减小近地面风速,减少O_(3)的平流输入,从而减少地面O_(3)。不同个例的主要控制因子不同。Based on the hourly observation data of black carbon(BC)and ozone(O_(3))at Nanjing ground station from 2016 to 2017,the relationship between BC and near surface O_(3) in different seasons was analyzed.Results shows that the O_(3) value under the influence of high BC(higher than average)is significantly lower than that under the influence of low BC(lower than average).The inhibition effect is obviously stronger in autumn and winter than in spring and summer,and the negative correlation between BC and O_(3) is significantly higher in autumn and winter than in spring and summer,while the negative correlation between PM_(2.5) and O_(3) is not significant.Based on the WRF-Chem model,the numerical simulations of BC feedback effect on O_(3) are carried out for the cases in December 2017,and the results confirm that BC has negative feedback effect on O_(3).The influencing mechanisms are as follows:BC can reduce the photochemical production of ozone(VOCs control area)by inhibiting the development of boundary layer and accumulating NO_(x) near the ground;BC can reduce the downward turbulent transport of high O_(3) in the upper part of the boundary layer by suppressing the vertical turbulent exchange in the boundary layer,so as to reduce O_(3) near the ground;BC can reduce the advection input of O_(3) from upwind region by reducing the near ground wind speed,so as to reduce the ground O_(3).The main control factors of the cases are different and should be analyzed in detail.

关 键 词：黑碳气溶胶 光化学臭氧 观测分析 数值模拟 

分 类 号：X51[环境科学与工程—环境工程] X831