Journal article

Preliminary results of GOME-2 water vapour retrievals and first applications in polar regions

Noël S, Mieruch S, Bovensmann H, Burrows J ...see all

Atmospheric Chemistry and Physics, vol. 8, issue 6 (2008) pp. 1519-1529

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Global total water vapour columns have been derived from measurements of the Global Ozone Monitoring Experiment 2 ({GOME-2)} on {MetOp.} For this purpose, the Air Mass Corrected Differential Optical Absorption Spectroscopy ({AMC-DOAS)} method has been adapted, having previously been applied successfully to {GOME} (on {ERS-2)} and {SCIAMACHY} ({SCanning} Imaging Absorption {spectroMeter} for Atmospheric {CHartographY}, on {ENVISAT)} data. Comparisons between the derived {GOME-2} and {SCIAMACHY} water vapour columns show a good overall agreement. This gives confidence that the temporal series of water vapour columns from {GOME-type} instruments ({GOME/ERS-2}, {SCIAMACHY/ENVISAT)}, which began in 1995, is successfully continued by the {MetOp} instrumentation until at least 2020. The enhanced temporal and spatial resolution of {GOME-2} enables the analysis of diurnal variations in the polar regions. This is especially important because atmospheric data sources in the polar regions are generally sparse. As an exemplary application, daily water vapour total columns over the polar research station Ny Alesund (78 degrees 55'19' N/11 degrees 56'33' E) are investigated. At this latitude {GOME-2} yields about six data points during daylight hours at varying local times. From these data diurnal variations of water vapour have been successfully retrieved.

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  • S. Noël

  • S. Mieruch

  • H. Bovensmann

  • J. P. Burrows

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