SGER: Measurements of particle emissions from The World Trade Center site in New York City

0211625 Parlange研究的目的是解决问题的粒子运输世界贸易中心(WTC)网站通过部署先进的仪器来测量粒子的发射和再悬浮到大气中按计划进行研究在一个为期10天的密集实地观察期间在世贸中心站点及周边地区的大纽约地区测量的粒子通量网站和垂直气溶胶羽流的水平范围。在现场，包括粒子图像测速仪（PIV）、全息PIV和声波风速计在内的湍流传感器组合安装在一个可伸缩的剖面塔上，以持续测量从地面到站点上方10米的p[文章的剪切应力、浓度和通量剖面。将部署一个扫描弹性激光雷达系统，以高分辨率（1.5米）测量低层大气（范围达7公里）中颗粒的相对浓度。激光雷达将部署在该站点附近以及大纽约市地区待识别的站点。激光雷达系统将使用从PIV系统获得的浓度测量值进行校准。将对收集到的实地数据进行分析，以确定天气条件（例如风切变应力、感热通量）与颗粒表面通量的大小以及向大气输送的程度之间的关系。＊＊＊

0211625 Parlange The purpose of the research is to address questions on the particle transport from the World Trade Center (WTC) Site through the deployment of state-of-the-art instrumentation to measure the emission and resuspension of particles into the atmosphere It is planned to conduct the study over a ten-day intensive field observation period at the WTC site and the surrounding region of the greater New York City area to measure the flux of particles from the site and the vertical and horizontal extent of the aerosol plume. At the site, a combination of turbulence sensors, including Particle Image Velocimetry (PIV), Holographic PIV and sonic anemometers mounted on a telescopic profiling tower to continually measure the shear stress and the concentration and flux profiles of p[articles from the surface up to 10 m. above the site.A scanning elastic lidar system will be deployed to measure at high resolution (1.5 m.) the relative concentration of particles in the lower atmosphere (range up to 7 km.). The lidar will be deployed both near the site and at sites to be identified in the greater NYC area.The lidar system will be calibrated using the concentration measurements obtained from the PIV systems.An analysis of the field data collected will be conducted to identify relationships between weather conditions (e.g., wind shear stress, sensible heat flux) and the magnitude of the surface flux of particles and the extent of the transport into the atmosphere. ***