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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GOME tropospheric excess NO2 columns Version 1 (outdated, please use V2 data!).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 NO2 V1 1996
- GOME NO2 V1 1997
- GOME NO2 V1 1998
- GOME NO2 V1 1999
- GOME NO2 V1 2000
- GOME NO2 V1 2001
- GOME NO2 V1 2002
- GOME NO2 V1 2003 (GOME data available January - June 11 only)
GOME tropospheric excess NO2 columns Version 1b (outdated, please use V2 data!).
This data set differs from Version 1 in two points:
- Use of SLIMCAT data to account for the variability in stratospheric NO2
- 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:
- GOME NO2 V1b daily January 1997
- GOME NO2 V1b daily February 1997
- GOME NO2 V1b daily March 1997
- GOME NO2 V1b daily April 1997
- GOME NO2 V1b daily May 1997
- GOME NO2 V1b daily June 1997
- GOME NO2 V1b daily July 1997
- GOME NO2 V1b daily August 1997
- GOME NO2 V1b daily September 1997
- GOME NO2 V1b daily October 1997
- GOME NO2 V1b daily November 1997
- GOME NO2 V1b daily December 1997
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:
- Use of daily SLIMCAT data to account for the variability in stratospheric NO2
- Use of the surface albedo climatology of Koelemeijer et al.
- Use of a variable tropospheric aerosol loading
- Correction for topography effects
- Use of airmass factors that are based on vertical NO2 profiles predicted by the MOZART model for 1997
- 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. Nüß: An improved tropospheric NO2 retrieval for GOME and SCIAMACHY, PhD Thesis, University of Bremen, 2005 (in German)Richter, A., Burrows, J. P., Nüß, 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°:
- GOME NO2 V2 1996
- GOME NO2 V2 1997
- GOME NO2 V2 1998
- GOME NO2 V2 1999
- GOME NO2 V2 2000
- GOME NO2 V2 2001
- GOME NO2 V2 2002
- GOME NO2 V2 2003 (GOME data available January - June 11 only, no SLIMCAT correction for May and June data yet)
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:
- GOME NO2 swath V2 1996 (~70 MBytes)
- GOME NO2 swath V2 1997 (~70 MBytes)
- GOME NO2 swath V2 1998 (~70 MBytes)
- GOME NO2 swath V2 1999 (~70 MBytes)
- GOME NO2 swath V2 2000 (~70 MBytes)
- GOME NO2 swath V2 2001 (~70 MBytes)
- GOME NO2 swath V2 2002 (~70 MBytes)
- GOME NO2 swath V2 2003 (~30 MBytes)
GOME data available January 2003 - June 11, 2003 only, no SLIMCAT correction for May and June data yet
References:
Chipperfield, M. P.: Multiannual Simulations with a Three-Dimensional Chemical Transport Model, J. Geophys. Res., 104, 1781–1805, 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.