Vienna horizontal and vertical distribution observations of nitrogen dioxide and aerosols

维也纳二氧化氮和气溶胶水平和垂直分布观测

• 批准号: 279146812
• 负责人: Dr. Andreas Richter
• 金额: --
• 依托单位: Veterinärmedizinische Universität Wien
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/279146812?language=en
• 关键词: Vienna; horizontal; vertical; distribution; observations

The overall goal of the proposed project is to improve our current knowledge of air pollution in large agglomerations caused by mankind. The investigation of nitrogen dioxide (NO2) and aerosol amounts will be based on spectral measurements from two Multi AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) instruments located at two different sites with ideal measurement conditions in Vienna, Austria. The MAX-DOAS instrument is an advancement of the zenith scattered light DOAS and Off-Axis DOAS that allows for measurements at different viewing directions and thus, obtaining information about the horizontal and vertical variations of trace gases and aerosols in the troposphere.The geometrical approximation and an optimal estimation method implemented in the Bremian advanced MAX-DOAS Retrieval Algorithm (BREAM) will be used to retrieve tropospheric columns and vertical profiles of NO2 and aerosols. The vertical profiles provide additional information for the comparison with in-situ measurements in Vienna.The altitude-averaged tropospheric vertical trace gas columns retrieved from MAX-DOAS together with meteorological measurements (e.g. wind speed, wind direction) allow the monitoring of air pollutants (NO2 and aerosols) for urban background, high-traffic roads, and industrial point sources on the horizontal level. The proposed long-term measurements (more than two years) will provide a valuable data set for analyzing the temporal variability of air pollutants over Vienna. Moreover, these data will be used for the comparison with MAX-DOAS observations in Athens, Greece, and Bremen, Germany to investigate similarities and differences between polluted sites at different latitudes and meteorological and photochemical regimes. Tropospheric vertical columns of NO2 will also allow the validation of satellite measurements from the OMI, GOME-2, and TROPOMI instruments as well as comparison with model simulations, for example from the COPERNICUS atmospheric monitoring service.As the measurements from the two instruments covering several azimuthal directions with partially overlapping fields of view together with in-situ measurements provide a multitude of information on the spatial NO2 distribution, an attempt will be made to develop a spatially resolved image of air pollution for Vienna using a tomographic imaging approach.The results of the project will provide information about the horizontal and vertical distributions of NO2 and aerosols over an urban environment. In addition to improvements in the trace gas retrieval, the results will also provide important information for the model community, as the vertical profiles of NO2 are a useful supplement to the point measurements of in-situ instruments.

拟议项目的总体目标是提高我们目前对人类造成的大规模聚集区空气污染的认识。二氧化氮（NO2）和气溶胶量的调查将基于两台多轴差分光学吸收光谱仪（MAX-DOAS）的光谱测量，这两台仪器位于奥地利维也纳的两个不同地点，具有理想的测量条件。MAX-DOAS仪器是天顶散射光DOAS和离轴DOAS的改进，允许在不同的观察方向进行测量，因此，本文介绍了Bremian改进的MAX-DOAS反演算法（BREAM）中的几何近似和最优估计方法，并给出了一种新的反演算法将被用来检索对流层柱和垂直剖面的NO2和气溶胶。垂直廓线为与维也纳的现场测量结果进行比较提供了额外的信息，从MAX-DOAS检索的高度平均对流层垂直示踪气体柱与气象测量结果（例如风速、风向）一起，可以监测城市背景、高交通量道路和水平水平工业点源的空气污染物（NO2和气溶胶）。拟议的长期测量（两年以上）将为分析维也纳上空空气污染物的时间变化提供一套宝贵的数据。此外，这些数据将用于比较在雅典，希腊和不莱梅，德国的MAX-DOAS观测，以调查在不同纬度和气象和光化学制度的污染站点之间的相似性和差异。对流层NO2垂直柱也将允许验证OMI、GOME-2和TROPOMI仪器的卫星测量结果，以及与模型模拟的比较，例如来自COPERNICUS大气监测服务。由于来自两个仪器的测量覆盖具有部分重叠视场的几个方位角方向，现场测量提供了大量关于NO2空间分布的信息，将尝试使用层析成像方法制作维也纳空气污染的空间分辨图像。该项目的结果将提供关于水平和垂直分布的信息城市环境中的二氧化氮和气溶胶。除了改进痕量气体的反演，结果也将提供重要的信息模式社区，作为NO2的垂直廓线是一个有用的补充，现场仪器的点测量。