Fourier transform measurements of H _2 ~(18)O and HD ~(18)O in the spectral range 1000-2300cm ~(-1)

摘要

The spectra of water vapor enriched by ~(18)O were recorded in the 1000-2300cm ~(-1) spectral range, which corresponds to the spectral region studied by IASI instrument (Infrared Atmospheric Sounding Spectrometer) instrument. The spectra were recorded by a step by step Fourier Transform Spectrometer (FTS) at room temperature with absorption path lengths up to 36m. Positions, intensities and self broadening coefficients of about 1800 lines of H _2 ~(18)O and 900 of HD ~(18)O were analyzed and all the transitions were assigned. This paper focuses on lines intensities and comparisons with data from literature are presented. An average difference of 10 with HITRAN2008 database H _2 ~(18)O line intensities is found with a maximum discrepancy of about 25 for the ν _1-ν _2 band.