GOME-2 vertical ozone profile quality assessment by satellite-to-satellite comparison

In the framework of EUMETSAT's AC SAF the Finnish Meteorological Institute participate in the Quality Assessment of the GOME-2 Ozone Profile product by comparing GOME-2 ozone profiles against the ozone profiles retrieved from limb-viewing satellite instruments.

These pages show resulting graphs when the GOME-2 offline high-resolution vertical ozone profiles are compared with ozone profiles from the Ozone Mapping and Profiler Suite Limb Profile (OMPS LP) instrument onboard the Suomi National Polar-orbiting Partnership (NPP) satellite. The OMPS LP version 2.5 daily ozone product has separate retrievals for ultraviolet (UV) and visible (VIS) wavelengths. See the release notes for further information. The OMPS LP daily ozone profile data from center slit is used.

The comparison is performed as soon as the new OMPS ozone daily data is available for comparison. Usually the delay is six days.

The comparison results presented here have a time range starting 1 January 2018. The resulting comparison plots of earlier months, starting from January 2017, will appear in these pages later.
See all monthly results here: Comparison plots

Note: The Metop-A/GOME-2 ozone profiles are affected by the degradation of GOME-2 instrument.

The latest day comparison results

The results are shown for GOME-2/Metop-B and GOME-2/Metop-A individually.

Metop-B

Data:
The map of collocated pixels The mean profiles in five latitude zones
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Figure 1. Collocation criteria: observations within 12 hours and distance between them is less than 200 km on WGS 84 ellipsoid. Figure 2. Legend box shows the number of collocations at each latitude zone. Middle and Right: The solid curves are for the means of OMPS LP profiles smoothed vertically with GOME-2 averaging kernels and dashed curves without smoothing.
The absolute and relative difference of daily means in five latitude zones
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Figure 3. Left: GOME-2B - VIS OMPS. Right: (GOME-2B - VIS OMPS) / VIS OMPS. VIS OMPS ozone profiles are smoothed with GOME-2 averaging kernels (avk). Figure 4. Left: GOME-2B - UV OMPS. Right: (GOME-2B - UV OMPS) / UV OMPS. UV OMPS ozone profiles are smoothed with GOME-2 averaging kernels (avk).

Metop-A

Data:
The map of collocated pixels The mean profiles in five latitude zones
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Figure 1. Collocation criteria: observations within 12 hours and distance between them is less than 200 km on WGS 84 ellipsoid. Figure 2. Legend box shows the number of collocations at each latitude zone. Middle and Right: The solid curves are for the means of OMPS LP profiles smoothed vertically with GOME-2 averaging kernels and dashed curves without smoothing.
The absolute and relative difference of daily means in five latitude zones
Sorry, no data Sorry, no data
Figure 3. Left: GOME-2A - VIS OMPS. Right: (GOME-2A - VIS OMPS) / VIS OMPS. For comparison the VIS OMPS ozone profiles are smoothed with GOME-2 averaging kernels (avk). Figure 4. Left: GOME-2A - UV OMPS. Right: (GOME-2A - UV OMPS) / UV OMPS. For comparison the UV OMPS ozone profiles are smoothed with GOME-2 averaging kernels (avk).

Acknowledgement: OMPS LP version 2.5 ozone profile data are produced by the LP processing team (DOI: 10.5067/X1Q9VA07QDS7).