Water vapor line parameters: Some feedback from atmospheric users; ; et al in Proceedings of the "8th Atmospheric Spectroscopy Applications" meeting (ASA2008) (2008, August) Despite recent major improvements of water vapour databases, the insufficient quality or consistency of the H2O spectroscopic parameters has been reported many times and line parameters are often manually ... [more ▼] Despite recent major improvements of water vapour databases, the insufficient quality or consistency of the H2O spectroscopic parameters has been reported many times and line parameters are often manually adjusted to minimize residuals and improve the quality of the fits. Atmospheric observations allow assessing the quality of databases through their simulation using the different line parameters reported in those databases. This work presents four concrete examples of the spectroscopic problems and proposed improvements in various spectral regions. [less ▲] Detailed reference viewed: 21 (3 ULg) H2O retrievals from Jungfraujoch infrared spectra: some spectroscopic problems.Demoulin, Philippe ; ; Mahieu, Emmanuel et alin Proceedings of the 8th Atmospheric Spectroscopy Applications Meeting (2008) Since 1949, solar absorption spectra have been acquired at the Jungfraujoch observatory (Swiss Alps, 46.5°N, 8.0°E, 3580 m a.s.l.), first with grating spectrometers, then with Fourier transform infrared ... [more ▼] Since 1949, solar absorption spectra have been acquired at the Jungfraujoch observatory (Swiss Alps, 46.5°N, 8.0°E, 3580 m a.s.l.), first with grating spectrometers, then with Fourier transform infrared (FTIR) spectrometers. Most observations collected with these instruments encompass water vapor absorptions, even the narrow spectral domains regularly recorded with the grating instruments to monitor the evolution of important atmospheric constituents. The aim of this work is to analyze all available spectra containing usable H2O absorption lines, to derive a long-term record of its total column in the atmosphere above the Jungfraujoch. In addition, more recent FTIR broadband spectra, with better signal-to-noise ratio and resolution, will be analyzed with state of the art algorithm, in order to derive information on the vertical distribution of H2O. [less ▲] Detailed reference viewed: 16 (1 ULg) |
||