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SCIAMACHY and GOME-2 support for POLARCAT
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Introduction:
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This page is intended as quick look interface to SCIAMACHY
and GOME-2 satellite data for the Arctic campaigns during IPY.
Currently, only BrO columns are provided which are not the results of pollution but are natural phenomena observed each year in polar spring in both hemispheres. The origin of the BrO is bromine from sea salt which is released in heterogeneous reactions on fresh sea ice, snow or frost flowers to the gas phase where it rapidly destroys ozone. It is planned to add NO2 as a tracer of anthropogenic pollution here soon. |
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Data:
The IUP-Bremen provides near realtime total BrO columns for the POLARCAT project to support flight planning and quick look interpretation. Data from two satellite instruments, SCIAMACHY and GOME-2 are used. All plots are produced automatically and without explicit quality control. Usually, the SCIAMACHY plots should be available 2 hours after measurement while the GOME-2 plots are produced each morning at about 10 UT. If you experience any problems, please contact Andreas Richter or Mathias Begoin.
The values plotted are atmospheric columns derived from the measurements assuming a stratospheric BrO profile. Over bright surfaces, this will give a good estimate of the total (tropospheric + stratospheric) column. Over dark surfaces, the tropospheric contribution will be underestimated. No cloud screening or correction is applied to give the best possible coverage. However, anything below optically thick clouds will be hidden from the satellite view and is missing in these figures.
SCIAMACHY images
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Much more SCIAMACHY data are accessible via the SCIAMACHY data browser page and the SCIAMACHY data archive.
GOME-2 images
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GOME-2 is still in early phase and any GOME-2 products have to be seen as preliminary. The products shown here are derived at the IUP Bremen. They are based on lv1 data provided by EUMETSAT but are not official GOME-2 data products.
As GOME-2 has several overpasses per day in high latitudes, the MAXIMUM of all measurements taken on a given day is shown for each location. This ensures that no events are "missed", but will not give a correct average value. A more detailed analysis will follow after the campaign.
High resolution EPS images
The EPS files to go with the bitmaps accessible through the tables can also be downloaded directly from our POLARCAT directory.
More data is available in our group off-line. If you have any requests, please contact Andreas Richter.
Prior to using any of these plots in a publication, please contact Andreas Richter about an updated version!
Links:
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More on SCIAMACHY BrO can be found on our SCIAMACHY BrO page.
- More on GOME-2 can be found on our GOME-2 page
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Many SCIAMACHY related links can be found on the German SCIAMACHY page.
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The POLARCAT project page can be found here
Contact:
If you are interested in more information or SCIAMACHY and GOME-2 tropospheric data, please contact Andreas Richter.