红外波段水汽连续吸收研究进展

Research Progress of Water Vapour Continuum in Infrared Spectral Regions

水汽连续吸收广泛存在于红外波段,对于地球辐射平衡和遥感探测有着重要的意义.一般水汽连续吸收的研究大多处于中红外窗口区域,而在吸收谱带内和近红外窗口区域的研究较少.目前,水汽连续吸收的机理仍然是一个有争议的课题.简要阐述了现有理论及计算模型的发展历史和研究现状,介绍了几种实验测量方法的原理、优点与不足,并对水汽连续吸收的发展进行了展望.

The infrared spectrum of water vapor is made up of strongly absorbing bands and many transparent windows between these bands. The water vapour continuum in these same spectral regions is of particular importance for the Earth＇s radiation budget and for remote sensing techniques that exploit these windows. Historically, most attention has focused on the mid-infrared atmospheric window, but there have been many fewer reports within bands and in the near-infrared spectral region. In addition, the causes of the continuum remain a subject of controversy. The history and recent developments of the causes of the continuum and calculation models were reviewed briefly. The advantages and disadvantages of several experimental methods were discussed. The possible future directions were given