Airborne Lidar Investigation of Ozone and Aerosols During the TOPSE (Troposheric Ozone Production about the Spring Equinox) Field Experment

在本项目中，作为TOPSE（春分前后对流层臭氧生产）现场实验的一部分，将对北美大陆中高纬度地区臭氧（O3）和气溶胶的大尺度分布进行研究。 将使用美国航天局机载紫外线差分吸收激光雷达系统测量臭氧和浮质剖面。 沿飞机飞行轨迹沿着可获得从近地面到对流层顶以上几千米的O3和气溶胶的完整垂直廓线，垂直分辨率为300 m，水平分辨率为几十千米。 这些信息将用于调查对流层O3收支中的迁移和生产/销毁的贡献，为O3模型提供初始条件和验证测量，并研究与北极大气污染有关的问题。与其他TOPSE调查人员合作，DIAL O3数据将与CO，NOx，碳氢化合物，CO2等的现场测量相结合，和气溶胶组成和大小分布来解释O3的大尺度变化。 激光雷达气溶胶测量将用于研究在自由对流层中观测到的气溶胶的来源和传输特性。 O3和气溶胶分布的紫外线DIAL测量将与大气的热力学结构、平流层和对流层之间的交换、不同气团的化学成分以及自由对流层中特别是高纬度北极地区的气体和气溶胶的远距离平流相关联。

AbstractBrowell - 9907910In this project, the large-scale distribution of ozone (O3) and aerosols will be investigated in mid-to-high latitudes over continental North America as part of the TOPSE (Tropospheric Ozone Production about the Spring Equinox) field experiment. Ozone and aerosol profiles will be measured using the NASA Airborne UV DIAL (Differential Absorption Lidar) system. Complete vertical profiles of O3 and aerosol distributions can be obtained along the aircraft flight track from near the surface to several kilometers above the tropopause, with a vertical resolution 300m in the vertical and a few tens of kilometers in the horizontal. This information will be used to investigate the contributions of transport and production/destruction in the tropospheric O3 budget, to provide initial conditions and validation measurements for O3 models, and to study issues related to atmospheric contamination in the Arctic. In collaboration with other TOPSE investigators, the DIAL O3 data will be combined with in situ measurements of CO, NOx, hydrocarbons, CO2, etc., and aerosol composition and size distributions to interpret the large-scale variations of O3. The lidar aerosol measurements will be used to examine the origin and transport properties of the aerosols observed in the free troposphere. The UV DIAL measurements of O3 and aerosol distributions will be correlated to the thermodynamic structure of the atmosphere, exchange between the stratosphere and troposphere, chemical composition of the different air masses, and the long-range advection of gases and aerosols in the free troposphere, particularly in the high-latitude Arctic.