城市高层建筑对城市雷电衍生大气污染物的影响机制

Ground level of atmospheric pollutants (NOx, ozone and particles (< 1000 nm)) induced by lightning are significant. As the high speed development of city, lightning frequency becomes higher in urban area because of urban effect. Urban high buildings number increase is considered as a reason of lightning increment. This has high relationship with urbanization, which play an important role on people. In this project, we plan to utilize several air pollutants monitoring equipments analysis based on Guangzhou Tower platform, and to obtain first hand surveillance and monitoring data related to urban lightning. Source characteristics, chemical transformation, and formation mechanisms, for lightning generated atmospheric pollutants near urban surface are found through in-depth observation and analysis. Effect of lightning on particle is also explored. We also make use of the lightning information from the lightning monitoring network, local meteorological data and the monitoring atmospheric pollutants to analyze atmospheric physical and chemical process. These results can provide a scientific base for the formulation of regional air pollution control and global climate change adaptation strategy.

雷电衍生大气污染物对近地面影响明显。随着城市的快速发展，城市效应使得城市雷电频发。而城市高层建筑物越来越多，这被认为是城市雷电增多的原因之一。这也与城市化过程密切相关，对人们的生产生活会产生重要影响。那么城市雷电衍生大气污染物的特征是什么，影响有多大，目前尚不清楚。本项目拟在雷电频发的广州中心城区，在广州塔这一城市高建筑物平台上，利用多种大气监测仪器分析，收集第一手雷电物理和大气化学相关的观测数据，研究城市雷电产生大气污染物（氮氧化物、臭氧和细粒子(< 1000 nm)等）特征。可以探讨城市雷电衍生的大气污染物源特征及其变化成因和机制；探索雷电对大气中细粒子的影响；结合雷电定位系统的雷电信息，气象资料，大气环境监测的数据分析城市雷电衍生大气污染物物理化学过程。这些结果将为区域空气污染治理及应对全球气候变化的政策提供科学依据。

本项目在雷电频发的广州中心城区，在广州塔这一城市高建筑物平台上，利用多种大气监测仪器分析，收集第一手雷电物理和大气化学相关的观测数据。研究发现在城市雷电产生大气污染物（LNOx、LO3等）高达50-70ppb。结合雷电定位系统的雷电信息，气象资料，大气环境监测的数据分析城市雷电衍生大气污染物物理化学过程。这些结果将为区域空气污染治理及应对全球气候变化的政策提供科学依据。