Preliminary results of GOME-2 water vapour retrievals and first applications in polar regions S. Noël, S. Mieruch, H. Bovensmann, and J. P. Burrows Institute of Environmental Physics, University of Bremen, FB 1, P. O. Box 330440, 28334 Bremen, Germany
Abstract. 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 Ålesund (78°55'19" N/11°56'33" E) are
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
Citation: Noël, S., Mieruch, S., Bovensmann, H., and Burrows, J. P.: Preliminary results of GOME-2 water vapour retrievals and first applications in polar regions, Atmos. Chem. Phys., 8, 1519-1529, doi:10.5194/acp-8-1519-2008, 2008.