Application of the Spectral Structure Parameterization technique: retrieval of total water vapor columns from GOME

[摘要] We use a recently proposed spectral sampling technique for measurements ofatmospheric transmissions called the Spectral Structure Parameterization (SSP) in order to retrieve total water vapor columns (WVC) from reflectivityspectra measured by the Global Ozone Monitoring Experiment (GOME). SSP provides a good compromise between efficiency and speed when performingretrievals on highly structured spectra of narrow-band absorbers like watervapor. We show that SSP can be implemented in a radiative transfer scheme which treats both direct-path absorption and absorption by singly-scatteredlight directly. For the retrieval we exploit a ro-vibrational overtone bandof water vapor located in the visible around 590 nm. We compare our resultsto independent values given by the data assimilation model of ECMWF. In addition, results are compared to those obtained from the more accurate, butmore computationally expensive, Optical Absorption Coefficient Spectroscopy(OACS).

[学科分类] 大气科学