Ground-based Observations and Theoretical Studies of the Vertical Column Abundance of Atmospheric Hydroxyl

用于预测的理论大气化学模式 人类活动对平流层臭氧的影响是 取决于测量反应性化学物种在 高层大气 自由基OH是一种重要的化学 活跃的短暂物种被认为控制了 臭氧浓度高于40公里，并有一个强大的 对奇氮奇氯分配的影响 影响约25公里处主要臭氧层的物种 高度 一种相对便宜的获得 关于OH水平波动的信息由 地面观测的柱丰富的OH的 聚乙烯压力扫描干涉仪 光谱仪）系统。 根据以前的NSF拨款，首席研究员 进行了成功的PEPSIOS测量计划， 弗里茨峰天文台在科罗拉多自1977年以来，和更多 最近在佛罗里达的博卡拉顿，扑克平地研究范围 在阿拉斯加的费尔班克斯附近和密克罗尼西亚的特鲁克岛。 这 研究是由一位科学家进行的， 被认为是大气化学领域的先驱 research. 他的研究论文是关于 平流层羟自由基浓度的变化 广受好评，并提供了重要的信息， 关于平流层化学的几个方面， 中间层 本研究将继续 大气中层羟基自由基的研究 热带地区以及从该物种的测量 弗里茨峰天文台。

Theoretical atmospheric chemistry models used to predict the effects of human activities on stratospheric ozone are dependent on measurement of reactive chemical species in the upper atmosphere. The radical OH is an important chemically active transient species that is believed to control the concentration of ozone above 40 km, and to have a strong influence on the partitioning of odd-nitrogen and odd-chlorine species that affect the main ozone level at about 25 km altitude. A relatively inexpensive method of gaining information about fluctuations in OH levels is provided by ground-based observations of the column abundance of OH by the PEPSIOS (Poly Etalcon Pressure Scanned Interferometric Spectrometer) system. Under previous NSF grants the principal investigator has carried on a successful program of PEPSIOS measurements at the Fritz Peak Observatory in Colorado Since 1977, and more recently for Boca Raton, Florida, the Poker Flat Research Range near Fairbanks, Alaska, and at Truk Island in Micronesia. This research is being done by a scientist who is generally recognized as a pioneer in this area of atmospheric chemistry research. His research papers on the spatial and temporal variations in the stratospheric hydroxyl radical concentrations are widely acclaimed and have provided important information about several aspects of the chemistry of the stratosphere and mesosphere. This continuation research will include continued studies of the middle atmosphere hydroxyl radical in the tropics as well as the measurement of this species from the Fritz Peak Observatory.