High Resolution Infrared Atmospheric Spectra: Solar Spectra Atlas and Laboratory Studies

太阳的红外光谱，通过地球的 大气，提供了丰富的信息，大气痕量 气体，它们的身份，以及它们在整个大气中的数量， 从地面观察。 信息的形式是 太阳光谱中的各个谱线位置（波长）， 以及任何给定的光谱线被吸收的强度 太阳光谱的背景 每条谱线都是一个信号 一些分子或原子种类。 由敏感的地面，或 气球携带的光谱仪器，因此有可能 调查大气中天然或人造气体的痕量水平 起源，并观察随时间的变化。 通过使用非常高分辨率的光谱仪器， 可以观察到数百条光谱线， 大气痕量气体，但要做到这一点，需要一个详细的目录， 大气中各种气体的精确波长，以及 透过大气层看到的太阳光谱。 这笔赠款 支持在赠款ATM-8315647下进行的研究的扩展， ATM-8609286它继续分析和编目的光谱 在这些早期赠款中收集的数据，以及在其第二和第三次赠款中收集的数据， 年，进一步的实验室测量，以产生新的高分辨率 大气中感兴趣的单个痕量气体的光谱，包括 据信会影响平流层臭氧层的气体。 这些新数据 也将被分析和分类。 理论分析 将制作复杂的分子光谱作为鉴定的辅助手段， 解释。 这一活动，虽然本身并不产生新的 物理和化学科学的见解，但建立了一个不可或缺的 这是一个参考工具，可以进行更深入的调查。 的 根据这项拨款， 对所有研究太阳红外光谱的科学家都很有用 以及地球大气层的变化。 这项工作将在一个配备了最先进的 光谱仪器 该研究小组享有 国际声誉的作用，促进应用 高分辨率光谱学用于大气成分研究。

The infrared spectrum of the sun, observed through the earth's atmosphere, affords a wealth of information about atmospheric trace gases, their identities, and their amounts in the whole atmosphere when observed from ground level. The information comes in the form of individual spectrum line positions (wavelengths) in the solar spectrum, and in the intensity with which any given spectral line is absorbed from the background of the solar spectrum. Each spectrum line is a signature of some molecular or atomic species. By sensitive ground-based, or balloon-borne, spectroscopic instrumentation it is thus possible to survey the atmosphere for trace levels of gases of natural or man-made origin, and to observe changes over time. By using spectroscopic instruments of very high resolution, it is possible to observe hundreds of spectral lines representing various atmospheric trace gases, but to do this requires a detailed catalogue of precise wavelengths of the various gases present in the atmosphere, and of the solar spectrum itself as seen through the atmosphere. This grant supports an extension of research done under grants ATM-8315647 and ATM-8609286. It continues the analysis and cataloguing of spectroscopic data gathered in those earlier grants and, in its second and third years, further laboratory measurements to produce new high-resolution spectra of individual trace gases of atmospheric interest, including gases believed to affect the stratospheric ozone layer. These new data will also be analyzed and catalogued. Theoretical analyses of the complex molecular spectra will be made as an aid to identification and interpretation. This activity, while not in itself yielding new insights into physical and chemical science, yet builds an indispensible reference tool on which more probing investigations can proceed. The atlas of solar infrared spectra being developed under this grant is useful to all scientists working on the infrared spectroscopy of the sun and of the earth's atmosphere. The work will be done in a laboratory equipped with state-of-the-art spectroscopic instrumentation. This research group enjoys an international reputation for its role in advancing the application of high-resolution spectroscopy to studies of atmospheric composition.