Modeling of Tropospheric Chemistry

这个项目是一个努力使用三维数值模拟，以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）冬季-春季外北方半球的化学演变; 2）丙酮的来源和大气分布。 其中第一项活动涉及参加关于春分的对流层臭氧生产（TOPSE）飞机实地活动。 该活动将研究春季光化学开始期间控制高纬度地区氮氧化物、氢氧化物和臭氧收支的化学物质，目的是了解该地区春季臭氧最大值的起源。 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收支的全球三维模拟。 模型结果将使用最近的飞机活动（SONEX、PEM-Tropics B）的结果进行评估。 该项目将利用哈佛地球观测系统对流层化学模型，该模型由美国航天局数据同化办公室的同化气象观测数据驱动。

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.