Tropospheric OH, HO2, N02, and NO by Resonance Emission: Instrumentation and Measurements of Abundances and Fluxes

在过去的几年里，检测羟基自由基的技术发展迅速。除了长程吸收和化学转化外，还有改进的原位光谱荧光方法。这种方法可以同时具有从偏远的地面站点或从飞机上进行多种测量所需的灵敏度和特异度。在过去的两年里，他们一直致力于在低气压下利用激光诱导荧光探测对流层中的OH和HO2的测量技术。这项技术现在已经发展得足够成熟，可以建造一种既可以从远程平台使用，也可以从飞机上使用的仪器。这项奖励将支持建造这一仪器，并允许进行一系列地面实地测量和相互比较。该仪器将被设计成可以安装在飞机的双层机架上。在飞机上的实际使用只需要设计和建造进气管道，并对进气口的方向进行微小的改变。

The number of detection techniques for the hydroxyl radical has blossomed within the last few years. In addition to long-path absorption and chemical conversion are the improved in situ, spectroscopic fluorescence methods. Such methods can have both the sensitivity and specificity that is required for versatile measurements from either remote ground-based sites or from aircraft. They have for the last two years pursued the measurement technique for detection of tropospheric OH and HO2 by laser induced fluorescence in chambers at low pressures. This technique is now sufficiently well developed that an instrument can be built which can be used either from remote platforms or from aircraft. This award will support the building of this instrument and allow a series of ground-based field measurements and intercomparisons. This instrument will be designed so that it can be mounted in a double rack on an aircraft. Actual use on an aircraft will require only the design and construction of an air intake duct and slight changes to the orientation of the air inlet.