University of Bremen IUP DOAS


DOAS HOME
NEWS
PUBLICATIONS
POSTER GALLERY
EDUCATION
SEMINAR
MEMBERS
MEETINGS
LINKS

Research

PROJECTS
SATELLITE
GROUND-BASED
AIRBORNE
DATA PRODUCTS

Navigate

Up
Glyoxal
GOME2 Volcanic Alert
GOME-2 NO2 STRAT
GOME-2 NO2 TROP
SCIA DATA BROWSER
SCIA NO2 STRAT
SCIA NO2 TROP
SCIA HCHO
GOME NO2 STRAT
GOME NO2 TROP
GOME HCHO
GOME BrO
GROUNDBASED

GOME tropospheric NO2 data


GOME tropospheric NO2 V1.0   V1b   V2.0  

GOME total column NO2 climatology


For the European project POET, a complete time series of GOME tropospheric NO2 columns has been created which can be downloaded as gridded monthly averages. 

These files are encrypted, for the password please contact Andreas Richter.

GOME tropospheric excess NO2 columns Version 1 (outdated, please use V2 data!).

For a description of the method used to derive the NO2 columns, please see:

Richter, A. and J.P. Burrows, Retrieval of Tropospheric NO2 from GOME Measurements, Adv. Space Res., 29(11) ,1673-1683, 2002    

GOME tropospheric excess NO2 columns Version 1b (outdated, please use V2 data!). 

This data set differs from Version 1 in two points:

  1. Use of SLIMCAT data to account for the variability in stratospheric NO2
  2. Use of airmass factors that are based on vertical NO2 profiles predicted by the MOZART model for each day and model pixel.

This data version is considered to be temporary only but is much more consistent than Version 1 data.

Daily maps of V1b for +/- 60 latitude  are also available:

Daily maps of V1b for +/- 60 latitude based on TOMCAT profiles are also available:

GOME tropospheric excess NO2 columns Version 2. 

This data set differs from Version 1 in several points:

  1. Use of daily SLIMCAT data to account for the variability in stratospheric NO2
  2. Use of the surface albedo climatology of Koelemeijer et al.
  3. Use of a variable tropospheric aerosol loading
  4. Correction for topography effects
  5. Use of airmass factors that are based on vertical NO2 profiles predicted by the MOZART model for 1997
  6. Use of a 0.2 cloud cover threshold based on the FRESCO algorithm

A more detailed description of the algorithm is given in the POET report, in

J. H. N: An improved tropospheric NO2 retrieval for GOME and SCIAMACHY, PhD Thesis, University of Bremen, 2005 (in German)

Richter, A., Burrows, J. P., N, H., Granier, C, Niemeier, U., Increase in tropospheric nitrogen dioxide over China observed from space, Nature, 437, 129-132, doi: 10.1038/nature04092, 2005.

Gridded ASCII files, 0.5 x 0.5:

NEW ASCII swath files:

The same data but as individual ASCII swath files giving the location and value for each measurement pixel can be found here:

References:

Chipperfield, M. P.: Multiannual Simulations with a Three-Dimensional Chemical Transport Model, J. Geophys. Res., 104, 17811805, 1999.

Koelemeijer, R. B. A., P. Stammes, J. W. Hovenier, and J. F. de Haan, A fast method for retrieval of cloud parameters using oxygen A band measurements from the Global Ozone Monitoring Experiment, J. Geophys. Res. 106, 3475-3490, 2001.

Koelemeijer, R. B. A., J. F. de Haan, and P. Stammes, A database of spectral surface reflectivity in the range 335 772 nm derived from 5.5 years of GOME observations, J. Geophys. Res., 108(D2), 4070, doi:10.1029/2002JD002429, 2003.

For  GOME tropospheric HCHO columns see here.

GOME NO2 total column climatology.

A very simple monthly total column climatology based on GOME measurements from 1996 - 2000 can be downloaded here:

Please note the readme file and the limitations applying to this data set in particular over continents!

Contact Andreas Richter.

web master:  folkard@iup.physik.uni-bremen.de      Last Update: 25-05-18      Data Privacy