Theoretical Studies in Tropospheric Chemistry: InteractionsWith the Biosphere and Hydrological Cycle

作为美国国家科学基金会全球对流层化学持续计划的一部分，这项为期三年的研究项目将研究将大气微量气体化学与生物圈和大气水循环相耦合的关键机制。生物圈/大气相互作用的研究将侧重于大气中光化学氧化剂的循环。使用阻力公式模拟大气氧化剂(例如，O_3、H_2O_2)向叶肉细胞的传质和沉积，这项研究将试图确定控制干沉积去除大气氧化剂的速率的关键化学和物理过程，以及植物对这些大气氧化剂沉积造成的损害的敏感程度。在一项相关研究中，将使用一维光化学模型来研究碳氢化合物的生物排放在控制原始和受污染的大陆环境中的大气氧化剂水平方面的作用。与水循环有关的研究将侧重于控制云对可溶痕量物质的清除和化学转化的过程，以及在全球对流层三维化学输送模式中模拟这些过程的算法的发展。

As part of the NSF's continuing program in Global Tropospheric Chemistry, this three-year research project will investigate key mechanisms which couple the trace gas chemistry of the atmosphere to the biosphere and to the atmospheric hydrological cycle. The investigations of biospheric/atmospheric interactions will focus on the cycle of photochemical oxidants in the atmosphere. Using the resistance formulation to simulate the mass transfer and deposition of atmospheric oxidants (eg., O3, H2O2) to mesophyllic leaf cells, this research will attempt to identify the key chemical and physical processes which control the rate of removal of atmospheric oxidants by dry deposition as well as the degree of sensitivity of a plant to damage from the deposition of these atmospheric oxidants. In a related study a one-dimensional photochemical model will be used to study the role of biogenic emissions of hydrocarbons in controlling the levels of atmospheric oxidants in pristine and polluted continental environments. The investigations relating to the hydrological cycle will focus on the processes which control the removal and chemical conversion of soluble trace species by clouds and the development of algorithms to simulate these processes in three- dimensional, chemical transport models of the global troposphere.