An Investigation of Interhemispheric Differences in Aerosol Physicochemistry in the Equatorial Pacific

在过去的几十年里， 某些痕量物质的大气浓度（例如，二氧化碳，臭氧， CH 4等）导致人们越来越意识到 有可能在全球范围内扰乱他的环境。 因此，在这十年中， 并了解遥远的大气层的性质， 有关的来源，转化和消除的过程 存在的成分。 这种调查 包括测量颗粒和气相物质， 对环境和气象的兴趣 已知影响其行为的参数。 理解 这些过程对于评估以下方面的重要性至关重要： 当前环境问题。 这些包括 1)云对气候的作用，2）气溶胶的作用， 大气辐射传输中的气体和3）地球化学 大气成分的循环。 任何对这些的调查 问题需要了解的相对影响， 人为的、“自然的”大陆和海洋贡献。 这项研究项目将支持数据分析 （1）近期中央太平洋大气 NCAR-Electra飞机上的比较实验 旨在比较和评估最近开发的 低气压下测量气体和气溶胶种类的技术 浓度的 尺寸分辨气溶胶信息将 结合其他CPACE研究者的测量结果， 我们大气观测的特征， 完成对气溶胶入口损失的拟议评估;以及 2)气溶胶物理化学和光学测量 目前获得的五个赤道断面的特性， 苏联-美国气体和气溶胶实验三的一部分 (SAGA三）赤道太平洋之间的夏威夷和萨摩亚群岛， 1990年的春天。

During the past few decades observed increases in atmospheric concentrations of certain trace species (eg. CO2, O3, CH4, etc.) have resulted in a growing awareness of man's potential to perturb his environment on a global scale. Consequently, this decade has seen increased efforts to identify and understand the properties of the remote atmosphere and the processes relating the sources, transformations and removal of the constituents that are present. This kind of investigation involves measurement of the particle and gas phase species of interest in conjunction with the environmental and meteorological parameters known to influence their behavior. Understanding these processes is essential to assessing the importance of various issues of current environmental concern. These include 1) the role of clouds on climate, 2) the role of aerosol and gases in atmospheric radiative transfer and 3) the geochemical cycling of atmospheric constituents. Any investigation of these issues requires a knowledge of the relative influence of anthropogenic, "natural" continental and marine contributions. This research project will support the analysis of data collected from: 1) the recent Central Pacific Atmospheric Comparison Experiment (CPACE) aboard the NCAR-Electra aircraft was intended to intercompare and evaluate recently developed techniques for measuring gas and aerosol species at low concentrations. Size-resolved aerosol information will be combined with the measurements of other CPACE investigators for the characterization of our atmospheric observations and to complete the proposed evaluation of aerosol inlet losses; and 2) measurements of aerosol physicochemistry and optical properties during five equatorial transects currently obtained as part of the Soviet-American Gas and Aerosol Experiment Three (SAGA III) the equatorial Pacific between Hawaii and Samoa in spring of 1990.