Ground Based Infrared Measurements in the Arctic

这个北极项目将测量一些在破坏平流层臭氧方面发挥重要作用的痕量气体。被测量的物质将包括氯化氢、甲烷、一氧化二氮、二氧化氮、乙烷、水蒸气、硝酸、硝酸氯、二氧化碳、氯氟烃F11和F22、臭氧和四氟化碳。测量将由傅里叶变换红外(FTIR)光谱仪在两种模式下从地面进行。主要的模式将是以高光谱分辨率观看日出(或日落)，并通过观测太阳红外辐射的吸收来推断大气成分，同时推断一些痕量气体的高度分布。第二种模式将是使用低分辨率的FTIR来测量极地夜晚太阳无法作为辐射源时痕量气体的排放。该项目对研究全球变化，特别是人造含氯化合物对臭氧层的影响具有重要意义。

This Arctic project will measure a number of trace gases which play an important role in the destruction of stratospheric ozone. The measured species will include hydrogen chloride, methane, nitrous oxide, nitrogen dioxide, ethane, water vapor, nitric acid, chlorine nitrate, carbon dioxide, the chlorofluorocarbons F11 and F22, ozone and carbon tetrafluoride. The measurement will be made from the ground by a Fourier Transform Infrared (FTIR) spectrometer operating in two modes. The primary mode will be to view the rising (or setting) sun at high spectral resolution and to deduce the atmospheric constituents by observing the absorption of solar infrared radiation and simultaneously deduce the altitude distribution of some of the trace gases. The secondary mode will be to use the FTIR at low resolution to measure emission from trace gases during the polar night when the sun is unavailable as a source of radiation. This project is important for the study of global change, especially for the effects of man-made chlorine bearing compounds on the ozone layer.