Ammonia in the Remote Troposphere through Participation in the Southern Hemisphere Marine Aerosol Characterization Experiment (ACE-1)

9420175 Bradshaw这项研究将侧重于通过定量测量气相NH3、“总”NH3和“总”NH3来表征氨（NH3）对远程海洋大气中对流层化学的影响。（即气体加颗粒），在1995年南半球海洋气溶胶特性实验（ACE-1）期间，NSF/NCAR C-130飞机上的空气和一氧化氮（NO）。 这项工作将寻求解决NH3的主要ACE-1计划的目标，确定控制气溶胶的形成和命运的关键物理和化学过程，以及这些过程如何影响的数量大小分布，化学成分，以及这些粒子的光学和云成核特性。 对于ACE- 1研究区域预计的万亿分之几的NH3水平，将使用格鲁吉亚理工学院先进的光致碎裂激光诱导荧光（PF/LIF）传感器来获得高精度（10%、2s）具有足够空间分辨率的数据，以便能够详细描述被认为会引起爆发的小空间尺度大气不均匀性，凝聚核（CN）的产生。 这些前所未有的测量能力将产生数据，能够对NH3在控制CN的发展以及云凝结核（CCN）的生长和激活方面的作用产生新的见解。 结合其他ACE-1测量，该项目应提供一个独特的视角的相对贡献，二元和三元成核过程对控制在远程大气中的新粒子生产率。 这项调查也将提供大气社区所需的信息NH3的空间分布在对流层在偏远的海洋环境。 这一大的空间尺度调查也将提供的基础上的NH3的作用，作为可能的氮氧化物（NOx）在遥远的对流层的第一个定量评估。

9420175 Bradshaw This research will focus on characterizing ammonia's (NH3) impact on the tropospheric chemistry within the remote marine atmosphere through the quantitative measurement of gas phase NH3, "total" NH3 (i.e. gaseous plus particulate), and nitric oxide (NO) on board the NSF/NCAR C-130 aircraft during the 1995 Southern Hemisphere Marine Aerosol Characterization Experiment (ACE-1). This effort will seek to address NH3's role within the primary ACE-1 program objective of determining the key physical and chemical processes controlling the formation and fate of aerosols and how these processes affect the number size distribution, the chemical composition, and the optical and cloud nucleating properties of these particles. For a few parts-per-trillion levels of NH3 that are anticipated over the ACE- 1 study regions, the Georgia Tech advanced photofragmentation laser-induced fluorescence (PF/LIF) sensor will be used to acquire high precision ( 10%, 2s) data with sufficient spatial resolution to enable a detailed characterization of the small spatial scale atmospheric inhomogeneities that are thought to give rise to bursts in condensation nuclei (CN) production. These unprecedented measurement capabilities will produce data capable of yielding new insights into NH3's role in controlling the development of CN and the growth and activation of cloud condensation nuclei (CCN). In conjunction with other ACE-1 measurements, this project should provide a unique perspective of the relative contributions that binary and ternary nucleation processes make toward controlling the rate of new particle production in the remote atmosphere. This investigation will also provide the atmospheric community with needed information of the spatial distribution of NH3 within the troposphere over remote marine environments. This large spatial scale survey will also provide the basis for the first quantitative assessment of NH3's role as possible source of nitrogen oxides (N0x) i n the remote troposphere.