• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Atmospheric Chemistry >Simultaneous measurements of ozone and its precursors on a diurnal scale at a semi urban site in India
【24h】

Simultaneous measurements of ozone and its precursors on a diurnal scale at a semi urban site in India

机译：在印度的一个半城市地区，以昼夜尺度同时测量臭氧及其前体

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Simultaneous observations of surface ozone (O_3) with its precursors namely, carbon monoxide (CO) and oxides of nitrogen (NO_x) have been taken on diurnal scale from a tropical semi-urban site, Pune (18.54°N, 73.81°E) in India. We present the data for one year (2003-2004) period to study the salient features of these trace gases. The peak in amplitude of ozone is found during the noontime whereas in CO and NO_x it is observed in the morning hours between 0800 and 0900 H. The concentration of these pollutants drop down considerably during southwest monsoon months and the diurnal pattern also become very weak. The diurnal trends of these gases are found to be different for different seasons, which are specific to the receptor site. Model simulations using 3-D chemical-transport model with regional emission inventories and observed winds have also been carried out. The comparison of model results with observations, on seasonal basis yielded a reasonable qualitative agreement. The relative role of local emissions and long range transport in the diurnal pattern for different seasons has been outlined, which reveals that the ozone is highly influenced by regional/long range transport in this region. The effect of precursor amounts in the morning on afternoon ozone peak levels has been investigated using the lag correlation study, which reveals that a time lag of 5-7 h is required for most of these precursor gases to photo-chemically produce ozone to its maximum potential. Results are discussed in the light of available topographic and meteorological conditions.
机译：从热带半城市地点浦那（18.54°N，73.81°E）的昼夜尺度同时观测了表面臭氧（O_3）及其前体一氧化碳（CO）和氮氧化物（NO_x）。印度。我们提供了一年（2003-2004）期​​间的数据来研究这些痕量气体的显着特征。在中午发现了臭氧的峰值，而在CO和NO_x中则是在0800至0900 H之间的早晨观察到的。这些污染物的浓度在西南季风月份显着下降，并且昼夜模式也变得很弱。发现这些气体的昼夜趋势在不同季节是不同的，这对于受体部位是特定的。还已经进行了使用3-D化学运输模型的模型模拟，包括区域排放清单和观测风。在季节性基础上将模型结果与观测值进行比较，得出了合理的定性一致性。概述了局部排放和远程运输在不同季节的昼夜模式中的相对作用，这表明臭氧在该地区受到区域/远程运输的强烈影响。已使用滞后相关研究研究了早晨中前体量对下午臭氧峰值水平的影响，该研究表明，大多数这些前体气体光化学生产臭氧至最大需要5-7小时的时间滞后。潜在。根据可用的地形和气象条件讨论了结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

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