Ozone Photochemistry in China: Field Measurements and Modeling Analysis

中国的臭氧光化学：现场测量和模型分析

• 批准号: 1405805
• 负责人: Yuhang Wang
• 金额: $ 58.23万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1405805&HistoricalAwards=false
• 关键词: Ozone; Photochemistry; China; Field; Measurements

This project is a continuation of an effort to better understand the ground level photochemistry that causes the formation of ozone, a pollutant with adverse effects on human health. Measurements of ozone precursors will be made as part of an international study named The Campaigns of Air Pollution Research in Megacity - Beijing and the North China Plain. This is a follow-on campaign to one that took place in August 2007 and will include scientists from France, Japan, Germany, Hong Kong, and the USA, as well as from China. Understanding ozone photochemistry over China is important to understanding global photochemistry.Both photochemical and transport modeling will be conducted to analyze the photochemistry and in-situ production of ozone at the site. Several issues related to the local photochemistry will be further analyzed. These include the investigation of key pathways for heterogeneous production of nitrous acid and for the loss of hydroperoxyl radicals onto aerosol surfaces. Data from the in situ and satellite measurements will be analyzed using the 3-D Regional chEmical trAnsport Model (REAM). Model simulations of photochemical reactions will be conducted, constrained by the concentrations of long-lived species and observations of intermediate species such as peroxyacetyl nitrate, peroxynitric acid, and glyoxal. The research results of this effort will be used to update some of the photochemical mechanisms used in the model.

该项目是为更好地了解导致臭氧形成的地面光化学现象而开展的一项工作的继续，臭氧是一种对人类健康有不利影响的污染物。臭氧前体物的测量将作为一项名为“北京和华北平原大城市空气污染研究运动”的国际研究的一部分。 这是2007年8月开展的一项活动的后续活动，将包括来自法国、日本、德国、香港和美国以及中国的科学家。了解中国上空的臭氧光化学对了解全球光化学非常重要。我们将进行光化学和传输模拟，以分析该地点的臭氧光化学和原位生成。 与局部光化学有关的几个问题将进一步分析。其中包括调查的关键途径的非均质生产亚硝酸和过氧化氢自由基到气溶胶表面的损失。将使用3-D区域化学迁移模型（REAM）分析现场和卫星测量的数据。将进行光化学反应的模型模拟，受长寿命物种的浓度和观察的中间物种，如过氧乙酰硝酸盐，过氧硝酸，乙二醛。这项工作的研究成果将用于更新模型中使用的一些光化学机制。