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Cloud fraction & cloud pressure

 
   
 
European Space Agency

 
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page last modified:
21 June 2010
     
For the retrieval of tropospheric trace gas columns it is essential to have information on the cloud cover conditions. Both the cloud fraction and the cloud pressure are needed as input for the trace gas retrieval algorithms. The (effective) cloud fraction and cloud pressure are derived from GOME and SCIAMACHY measurements with the FRESCO cloud algorithm.The OMI cloud information is derived with the OMCLDO2 algorithm.

Latest results for SCIAMACHY and GOME-2

SCIAMACHY:GOME-2:

Archives

SCIAMACHY cloud information (FRESCO+ (version SC-v5))

Cloud Fraction images:
Cloud Pressure images:
Datafiles:
2002  |  2003  |  2004  |  2005  |  2006  |  2007  |  2008  |  2009  |  2010
2002  |  2003  |  2004  |  2005  |  2006  |  2007  |  2008  |  2009  |  2010
2002  |  2003  |  2004  |  2005  |  2006  |  2007  |  2008  |  2009  |  2010

Monthly mean images & data:

2002-2010
 

GOME-2 cloud information (FRESCO+ (version G2-v5))

          Cloud Fraction images:
Cloud Pressure images:
Datafiles:
2007  |  2008  |  2009  |  2010
2007  |  2008  |  2009  |  2010
2007  |  2008  |  2009  |  2010
 

GOME cloud information (FRESCO+ (version GO-v5, level 1 v.4.0))

Datafiles: 1996  |  1997  |  1998  |  1999  |  2000  |  2001  |  2002  |  2003  |  2004  |  2005  |  2006  |  2007  |  2008  |  2009  
Older datafiles (version GO-v5, level 1 v.3.02):
         1996  |  1997  |  1998  |  1999  |  2000  |  2001  |  2002  |  2003  |  2004  |  2005  |  2006  |  2007  |  2008  
 

OMI cloud information (OMCLDO2)

Datafiles (collection 3): all years  
          Cloud Fraction images: 2007  |  2008  |  2009  |  2010    Warning for OMI data users

Citation

When the data is used in scientific publications, please refer to the following publication:

For FRESCO+ (GOME,SCIAMACHY,GOME-2) data:
P. Wang, P. Stammes, R. van der A, G. Pinardi, M. van Roozendael (2008), FRESCO+: an improved O2 A-band cloud retrieval algorithm for tropospheric trace gas retrievals, Atmospheric Chemistry and Physics, 8, 6565-6576

For OMI data:
Acarreta, J.R., J.F. de Haan and P. Stammes, Cloud pressure retrieval using the O2-O2 absorption band at 477 nm, J. Geophys. Res., 2004, 109, doi:10.1029/2003JD003915.


Acknowledgement

The FRESCO+ data products of GOME-2 were generated using level 1 data developed within the O3MSAF project of the EUMETSAT.
 

Documentation

Scientific papers

  • 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. (PDF)
  • Koelemeijer, R. B. A., P. Stammes, J. W. Hovenier, and J. F. de Haan, "Global distributions of effective cloud fraction and cloud top pressure derived from oxygen A band spectra measured by the Global Ozone Monitoring Experiment: comparison to ISCCP data," J. Geophys. Res. 107, doi 10.1029/2001JD000840, 2002. (PDF)
  • N. Fournier, P. Stammes, J.R. Acarreta, H. Eskes, A. Piters,M. Hess, A. von Bargen, A. Kokhanovsky, and M. Grzegorski,"SCIAMACHY cloud product validation", In: Envisat Validation Workshop Proceedings (ACVE-2), ESA Special Publication SP-562, May 3-7, 2004, Frascati, Italy. (PDF)
  • N. Fournier, P. Stammes, M. de Graaf, R. van der A, A. Piters, M. Grzegorski, A. Kokhanovsky, Improving cloud information over deserts from SCIAMACHY Oxygen A-band measurements, ACP, p163-172, SRef-ID: 1680-7324/acp/2006-6-163
  • P. Wang, P. Stammes, N. Fournier, Test and first validation of FRESCO+, Proceedings of SPIE volume 6362, Remote Sensing 2006, 11-16 Sep. 2006, Stockholm, Sweden (PDF)
  • P. Wang, P. Stammes, R. van der A, G. Pinardi, M. van Roozendael (2008), FRESCO+: an improved O2 A-band cloud retrieval algorithm for tropospheric trace gas retrievals, Atmospheric Chemistry and Physics, 8, 6565-6576 (html-link)