CEDAR: Mesospheric Temperatures Probed by Simultaneous Measurement of OH and O2 in the Nighthglow

PI：Cosby，PhilipATM-9908767 PI建议研究从OH-Meinel波段光谱中提取中间层温度的基本基础。Meinel波段观测的广泛历史记录为监测变化最剧烈的大气区域的全球变化提供了独特的数据集。从一个地点的历史记录到另一个地点的结果不一致，使从OH发射测量得出的具体结论变得复杂。在这一初步分析中使用的夜辉光谱是从1994年12月到1997年5月期间，由夏威夷莫纳克亚的Keck 1望远镜上的HiRes梯形光谱仪观测到的14个恒星或类星体获得的数百个单独光谱的总和。光谱覆盖了从573到893 nm的波长范围，在这台光学速度极快的仪器上总积累时间超过100小时。PI建议分析组成这一高度平均总和的各个光谱，将Meinel波段发射与O2 0-1大气波段发射有关的季节、强烈和弱夜间以及其他适当的分类标准一起表征，以确定如何最好地将特定波段的视OH旋转温度与发射高度处的中间层平均热能联系起来。

PI: Cosby, PhilipATM-9908767The PI proposes to study the fundamental foundation for the extraction of mesospheric temperatures from OH Meinel band spectra. The extensive historical record of Meinel band observations provides a unique data set for monitoring global change in a region of the atmosphere where changes may be the most dramatic. Inconsistency in results from the historical record of one site to another complicate concrete conclusions from OH emission measurements.To nightglow spectrum used in this initial analysis is the sum of hundreds of individual spectra acquired by 14 groups observing stars or quasars with the HIRES echelle spectrometer on the Keck 1 telescope on Mauna Kea, Hawaii, over a period from December 1994 through May 1997. The spectrum covers the wavelength range from 573 to 893 nm, with total accumulation time in excess of 100 hours on this optically fast instrument. The PI proposes to analyze the individual spectra that comprise this highly averaged sum, characterizing the Meinel band emission together with the O2 0-1 atmospheric band emission with regard to seasons, intense and weak nights, and other pertinent sorting criteria to determine how best to relate the apparent OH rotational temperature from a specific band to the average thermal energy of the mesosphere at the altitude of the emission.