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

用于预测人类活动对平流层臭氧影响的理论大气化学模型依赖于对高层大气中活性化学物种的测量。自由基OH是一种重要的化学活性瞬变物种，被认为可以控制臭氧浓度在40公里以上，并对影响约25公里高度主要臭氧水平的奇氮和奇氯物种的分配有很大影响。通过PEPSIOS(聚标准具压力扫描干涉光谱仪)系统对OH柱丰度的地面观测，提供了一种获得关于OH水平波动的信息的相对廉价的方法。根据NSF之前的拨款，首席研究员自1977年以来一直在科罗拉多州的弗里茨峰值天文台进行了一项成功的PEPSIOS测量计划，最近又在佛罗里达州博卡拉顿、阿拉斯加费尔班克斯附近的扑克平原研究靶场和密克罗尼西亚的特鲁克岛进行了PEPSIOS测量。这项研究是由一位科学家进行的，他被公认为这一大气化学研究领域的先驱。他的关于平流层羟基自由基浓度时空变化的研究论文广受好评，并提供了关于平流层化学和大气化学的几个方面的重要信息。中间层。这项继续研究将包括热带中大气羟基自由基的继续研究以及测量。来自弗里茨峰天文台的这一物种。

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.