Modeling of Tropospheric Chemistry

这个项目致力于利用三维数值模拟来提高我们对对流层化学的理解。该项目将重点研究两个问题：1)冬春季温带外北半球的化学演化；2)丙酮的来源和大气分布。第一项活动涉及参加关于春分飞机的对流层臭氧生产实地活动。这项活动将研究在春季光化学开始时控制高纬度地区NOx、Hox和臭氧预算的化学，目的是了解该地区春季臭氧最大值的来源。第二个主题涉及提高我们对丙酮及其作为对流层上层HOX和过氧乙酰硝酸盐(PAN)来源的作用的理解。来自实地和实验室研究的新信息将用于开发全球丙酮预算的全球3-D模拟。模型结果将使用最近的飞机战役(Sonex，PEM-热带B)的结果进行评估。该项目将利用哈佛-GEOS对流层化学模型，该模型由NASA数据同化办公室的同化气象观测推动。

This project is an effort to use 3-D numerical simulations to improve our understanding of tropospheric chemistry. The project will focus on two issues: 1) the chemical evolution of the extratropical northern hemisphere in winter-spring, and 2) the sources and atmospheric distribution of acetone. The first of these involves participation in the Tropospheric Ozone Production about the Spring Equinox (TOPSE) aircraft field campaign. This campaign will examine the chemistry controlling the budgets of NOx, HOx, and ozone at high latitudes during the springtime onset of photochemistry, with the goal of understanding the origin of the springtime ozone maximum in that region. The second topic involves improving our understanding of acetone and its role as a source of HOx and peroxyacetyl nitrate (PAN) in the upper troposphere. New information from field and laboratory studies will be used to develop a global 3-D simulation of the global acetone budget. The model results will be evaluated using results from recent aircraft campaigns (SONEX, PEM-Tropics B). This project will utilize the Harvard-GEOS model of tropospheric chemistry, driven by assimilated meteorological observations from the NASA Data Assimilation Office.