THE SENSITIVITY OF REGIONAL OZONE MODELING TO BIOGENIC HYDROCARBONS
THE SENSITIVITY OF REGIONAL OZONE MODELING TO BIOGENIC HYDROCARBONS
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DOI：
10.1029/91jd00005
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发表时间：
1991-04-20
影响因子：
4.4
通讯作者：
SCHERE, KL
中科院分区：
文献类型：
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作者：
ROSELLE, SJ;PIERCE, TE;SCHERE, KL
利用水平分辨率为18公里的欧拉网格光化学模式，研究了美国东北部地区臭氧浓度对生物碳氢化合物的敏感性。对观测到的臭氧浓度超过200 ppb的6天时间进行了模拟。模型模拟中包括了对生物来源的非甲烷烃(NMHC)排放的详细估计。总体而言，生物排放与人为排放具有相同的数量级。大约33%的生物来源清单是异戊二烯的形式，其余的NMHC以单萜类和未鉴定的NMHC的形式存在。分析了三个模型灵敏度运行，在这些运行中，生物排放，然后是人为的碳氢化合物排放，被选择性地从排放数据集中删除。对每个模拟的事件最大预测臭氧浓度进行了比较，并对模型域内的两个轨迹进行了详细的化学分析。分析表明，与人为碳氢化合物相比，生物碳氢化合物对臭氧产生的相对影响在模型领域内存在空间差异。在该领域的西部和南部，特别是在俄亥俄河谷，对臭氧的生物影响最大，而在城市化的东北走廊和工业五大湖区，人为影响最大。
The sensitivity of regional ozone concentrations to biogenic hydrocarbons in the northeastern United States has been examined using an Eulerian grid photochemical model having a horizontal resolution of 18 km. A 6-day period during which observed ozone concentrations exceeded 200 ppb was simulated. Detailed estimates of biogenic nonmethane hydrocarbon (NMHC) emissions were included in the model simulations. Overall, biogenic emissions were of the same order of magnitude as anthropogenic emissions. Approximately 33% of the biogenic inventory was in the form of isoprene, with the remainder of the NMHC in the form of monoterpenes and unidentified NMHC. Three model sensitivity runs were analyzed in which biogenic emissions, and then anthropogenic hydrocarbon emissions, were selectively removed from the emissions data set. Episode maximum predicted ozone concentrations were compared for each simulation, and a detailed chemical analysis was performed on two trajectories within the modeling domain. The analysis showed that the relative impact of biogenic compared to anthropogenic hydrocarbons on ozone generation varied spatially over the model domain. The biogenic influence on ozone was greatest in western and southern sections of the domain, particularly in the Ohio Valley, while the anthropogenic influence was greatest in the urbanized Northeast Corridor and industrial Great Lakes area.