• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >Characteristics of Atmospheric Boundary Layer Structure during PM2.5 and Ozone Pollution Events in Wuhan, China
【2h】

Characteristics of Atmospheric Boundary Layer Structure during PM2.5 and Ozone Pollution Events in Wuhan, China

机译：中国武汉PM2.5和臭氧污染事件中大气边界层结构特征

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this study, we investigated six air pollutants from 21 monitoring stations scattered throughout Wuhan city by analyzing meteorological variables in the atmospheric boundary layer (ABL) and air mass backward trajectories from HYSPLIT during the pollution events. Together with this, ground meteorological variables were also used throughout the investigation period: 1 December 2015 to 30 November 2016. Analysis results during this period show that the city was polluted in winter by PM2.5 (particulate matter with aerodynamics of less than 2.5 microns) and in summer by ozone (O3). The most polluted day during the investigation period was 25 December 2015 with an air quality index (AQI) of 330 which indicates ‘severe pollution’, while the cleanest day was 26 August 2016 with an AQI of 27 indicating ‘excellent’ air quality. The average concentration of PM2.5 (O3) on the most polluted day was 265.04 (135.82) µg/m3 and 9.10 (86.40) µg/m3 on the cleanest day. Moreover, the percentage of days which exceeded the daily average limit of NO2, PM10, PM2.5, and O3 for the whole year was 2.46%, 14.48%, 23.50%, and 39.07%, respectively, while SO2 and CO were found to be below the set daily limit. The analysis of ABL during PM2.5 pollution events showed the existence of a strong inversion layer, low relative humidity, and calm wind. These observed conditions are not favorable for horizontal and vertical dispersion of air pollutants and therefore result in pollutant accumulation. Likewise, ozone pollution events were accompanied by extended sunshine hours, high temperature, a calm wind, a strongly suspended inversion layer, and zero recorded rainfall. These general characteristics are favorable for photochemical production of ozone and accumulation of pollutants. Apart from the conditions of ABL, the results from backward trajectories suggest trans-boundary movement of air masses to be one of the important factors which determines the air quality of Wuhan.
机译：在这项研究中，我们研究了从通过在污染事件的分析，从HYSPLIT大气边界层（ABL）和空气质量落后的轨迹气象变量遍布武汉市21个监测站六种安全污染物。这期间显示，该市在冬季受PM2.5（小于2.5微米的空气动力学颗粒物污染在2015年12月1日至11月30日2016年分析结果：与这一起地，地面气象变量也被用来在整个调查期）和臭氧（O3夏季）。在调查期间污染最严重的一天是25 2015年12月与330的空气质量指数（AQI），这表明“重度污染”，而清洁日2016年8月为26与27表示“优秀”空气质量AQI的。 PM2.5的（O3）的最污染天平均浓度为265.04（135.82）微克/立方米和9.10（86.40）微克上最干净的天/立方米。此外，天其超过NO2，PM10，PM2.5，O3和的日均限值全年的比例分别为2.46％，14.48％，23.50％，39.07和％，而SO2和CO被发现低于设定涨停。 ABL的期间PM2.5污染事件的分析显示了在强反型层，低相对湿度，和静风的存在。这些观察到的条件不为空气污染物的水平和垂直分散良好，并因此导致污染物的积累。同样地，臭氧污染事件伴随着延长日照时，高温，平静的风，强悬浮反转层，和零记录降雨。这些一般特征是光化学臭氧产量和污染物的积累有利。除了ABL的条件下，从向后轨迹结果提示气团跨界运动为的，其确定武汉的空气质量的重要因素之一。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号