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Stratospheric NO2 data from GOME-2


Introduction   Station Data   Disclaimer   Contact   Links

Introduction:

For validation purposes, a time series of daily GOME-2 NO2 columns (January 2007 - December 2013) within a 200 km radius has been created which can be downloaded in ASCII format for a number of validation stations

For data before GOME-2 operations, please have a look at our SCIAMACHY stratospheric NO2 page or the  GOME stratospheric NO2 data page.

Top GOME-2 stratospheric NO2 columns over stations Version 2.0:

This GOME-2 NO2 product produced at the University of Bremen is a simple total column data set assuming a purely stratospheric NO2 without tropospheric contribution. The retrieval settings are similar to those described in

with the exception of not including the empirical sand signature and the correction for GOME-2 polarisation sensitivity. To compensate for this, a higher degree polynomial is used.

Please also read the disclaimer.

Data Format

The data format is plain ASCII with 29 header lines starting with a '*' character followed by the lines with the data organized in 12 columns separated by blanks:

column 1: fractional day of year 1993 UT

column 2: fractional day of year UT

column 3: solar zenith angle []

column 4: daily average slant column of NO2 [molec cm-2] in 200 km radius

column 5: daily average vertical column of NO2 [molec cm-2] in 200 km radius

column 6: daily minimum slant column of NO2 [molec cm-2] in 200 km radius

column 7: daily minimum vertical column of NO2 [molec cm-2] in 200 km radius

column 8: daily maximum slant column of NO2 [molec cm-2] in 200 km radius

column 9: daily maximum vertical column of NO2 [molec cm-2] in 200 km radius

column 10: rms of NO2 slant columns

column 11: rms of NO2 vertical columns

column 12: average chisquare of retrieval

 

Station data Plot Lat. Long.
Eureka plot 80.1N 86.4W
Ny-Alesund, Spitzbergen plot 78.9N 11.9E
Summit, Greenland plot 72.5N 38W
Thule plot 76.5N 68.8W
Scoresbysund, Greenland plot 70.5N 22.0W
Andoya, Norway plot 69.3N 16.0E
Kiruna, Sweden plot 67.8N 21.1E
Sodankyla, Finland plot 67.4N 26.7E
Salekhard, Siberia plot 66.7N 66.7E
Zhigansk, Russia plot 66.7N 123.4E
Trondheim, Norway plot 63.7N 10.5E
Harestua, Norway plot 60.2N 10.8E
St. Petersburg, Russia plot 60.0N 30.3E
Zvenigorod, Russia plot 55.4N 36.5E
Bremen, Germany plot 53.1N 8.9E
Aberystwyth, UK plot 52.0N 4.1W
Zugspitze, Germany plot 47.4N 12.0E
Jungfraujoch, Switzerland plot 46.6N 8.0E
OHP, France plot 43.9N 5.7E
Mt Cimone, Italy plot 44.2N 10.7E
Kislovodsk plot 43.7N 42.7E
Rikubestu plot 43.5N 143.8E
Issyk-Kul plot 42.6N 77.0E
Stara Zagora, Bulgaria plot 42.4N 25.0E
Evora, Portugal plot 38.56N 7.90W
Kiso plot 35.8N 137.6E
Izana, Canaries plot 28.3N 16.5W
Mauna Loa plot 19.7N 155.6E
Djougou plot 9.7N 1.7E
Merida, Venezuela plot 8.2N 71.1W
Paramaribo, Suriname plot 5.8N 55.2W
Tarawa, Kiribati Republic plot 1.4N 172.9E
Nairobi, Kenya plot 1.3S 36.8E
Ciater Bandung plot 6.4S 107.4E
Saint-Denis plot 21.1S 55.4E
Bauru, Brazil plot 22.4S 49.0W
Wollongong plot 34.4S 150.9E
Lauder, New Zealand plot 45.0S 169.7E
Kerguelen Island plot 49.4S 70.3E
Rio Gallegos plot 51.6S 69.32W
Macquarie plot 54.5S 159.0E
Ushuaia, Argentinia plot 54.82S 68.32W
Marambio, Antarctica plot 64.3S 56.7W
Faraday, Antarctica plot 65.3S 64W
Dumont dUrville, Antarctica plot 66.7S 140E
Rothera, Antarctica plot 67.6S 68.1W
Syowa, Antarctica plot 69.0S 39.6E
Neumayer, Antarctica plot 70.65S 8.3W
Mario Zucchelli Station, Antarctica plot 74.69S 164.12E
Concordia, Antarctica plot 75.1S 123.35E
Belgrano, Antarctica plot 77.87S 34.62W
Arrival Heights, Antarctica plot 77.8S 166.7E
Want more stations or updated files? Send a request to Andreas Richter.

The full data set with all individual overpasses can be downloaded as a zip-file (> 400 MBytes) here.

TopDisclaimer:

GOME-2 NO2 columns provided on this page are a scientific product created at the University of Bremen and based on the operational lv1-spectra provided by EUMETSAT. They are not related to the operational GOME-2 lv2-products distributed by DFD/DLR that also contain NO2 columns. Although the two GOME-2 NO2 data products agree qualitatively, the differences are significant, and thorough validation will have to be performed of both products.

Only the descending part of the orbit is used in this data set to avoid complications from averaging over measurements taken at different local time. However, at high latitudes, GOME-2 has several overpasses per day and systematic changes are expected from the diurnal profile of NO2. For detailed comparison with other data sets, the full overpass files have to be used (see link below table).

The NO2 columns in the files provided on this page are total columns assuming a stratospheric profile (US standard atmosphere with the troposphere set to 0). Wherever there is substantial NO2 in the troposphere (for example in polluted regions such as Germany), the columns will exceed the real stratospheric ones and are not very accurate.

Top Links:

TopContact

If you have any questions, comments or data requests, please contact Andreas Richter.

web master:  folkard@iup.physik.uni-bremen.de      Last Update: 24-01-14