Digital Object Identifier
Entry information for CLAAS_V002

Here you find the details of your selected DOI acronym and the links to order the described products.

Title

CLAAS-2: CM SAF CLoud property dAtAset using SEVIRI - Edition 2

Citation

Finkensieper, Stephan; Meirink, Jan-Fokke; van Zadelhoff, Gerd-Jan; Hanschmann, Timo; Benas, Nikolaos; Stengel, Martin; Fuchs, Petra; Hollmann, Rainer; Werscheck, Martin (2016): CLAAS-2: CM SAF CLoud property dAtAset using SEVIRI - Edition 2, Satellite Application Facility on Climate Monitoring, DOI:10.5676/EUM_SAF_CM/CLAAS/V002, https://doi.org/10.5676/EUM_SAF_CM/CLAAS/V002. [BibTeX entry]

Publisher

Satellite Application Facility on Climate Monitoring (CM SAF)

Publication year

2016

Author(s)

Finkensieper, Stephan; Meirink, Jan-Fokke; van Zadelhoff, Gerd-Jan; Hanschmann, Timo; Benas, Nikolaos; Stengel, Martin; Fuchs, Petra; Hollmann, Rainer; Werscheck, Martin

Description

The CLAAS-2 record provides cloud properties derived from the SEVIRI sensor onboard METEOSAT second generation (MSG) satellites. This second edition is the improved and extended follow-up of the first version of the record (Stengel et al., 2014; CLAAS-1 DOI:10.5676/EUM_SAF_CM/CLAAS/V001). In order to ensure a homogeneous data basis, the solar SEVIRI channels of MSG-1, MSG-2 and MSG-3 were intercalibrated (Meirink et al, 2013) with MODIS Aqua before applying the cloud retrievals. CLAAS-2 features 12 years (2004-2015) of cloud mask/type, cloud top temperature/pressure/height, cloud phase as well as cloud microphysical properties such as optical thickness, effective droplet radius and cloud water path. The data are available on native SEVIRI resolution, i.e. 15 minutes repeat cycle and 3km (nadir) to 11km (edge of the field of view) spatial resolution. In addition, spatio-temporal averages of the above mentioned cloud properties are included: Daily and monthly averages and monthly histograms on a 0.05° x 0.05° grid as well as monthly mean diurnal cycles on a 0.25° x 0.25° grid. The advancements compared to CLAAS-1 (DOI:10.5676/EUM_SAF_CM/CLAAS/V001) are for example: (1) extended MSG measurement record used with better calibration, (2) improvements made to the retrieval algorithm leading to products with higher quality and (3) increased temporal resolution (15 Minutes). A summary on the CLAAS-2 characteristics and a comprehensive evaluation of the results are currently documented in Benas et al. (2017). Along with the data, a comprehensive documentation including user guide, algorithm descriptions, reprocessing layout and extensive validation studies, is provided. With CLAAS-2, regional and large scale cloud processes at temporal scales of minutes to years can be studied. SEVIRI-based surface radiation products, which were part of CLAAS-1, are now released in a separate dataset (SARAH-2).

Format

NetCDF-4

Version

3.0

Temporal coverage

2004-01-19 - 2015-12-31

Geographic coverage

Latitude: -81.30° S to 81.30° N
Longitude: -81.25° W to 81.25° E

Size

23.4 TiB

Documentation

Related publications

Auxiliary data

Related Data Records

Data record details and ordering

This data record is superseded by a new version (see related data records). If you need access to products from this data record, please contact our User Help Desk (contact.cmsaf@dwd.de).

Products from Meteosat Second Generation (MSG)

Cloud mask (CMA)

  • Instantaneous (METEOSAT disk)

Cloud phase (CPH)

  • Monthly mean diurnal-cycle (METEOSAT full disk),
  • Monthly mean (METEOSAT full disk),
  • Daily mean (METEOSAT full disk)

Cloud top parameters CTT, CTP and CTH (CTO)

  • Monthly mean diurnal-cycle (METEOSAT full disk),
  • Monthly histogram (METEOSAT full disk),
  • Monthly mean (METEOSAT full disk),
  • Daily mean (METEOSAT full disk)

Cloud water path (CWP)

  • Monthly histogram (METEOSAT full disk)

Fractional cloud cover (CFC)

  • Monthly mean (METEOSAT full disk),
  • Monthly mean diurnal-cycle (METEOSAT full disk),
  • Daily mean (METEOSAT full disk)

Ice water path (IWP)

  • Monthly mean (METEOSAT full disk),
  • Monthly mean diurnal-cycle (METEOSAT full disk),
  • Daily mean (METEOSAT full disk)

Instantaneous COT, CPH and CWP (CPP)

  • Instantaneous (METEOSAT disk)

Instantaneous CTT, CTP and CTH (CTX)

  • Instantaneous (METEOSAT disk)

Joint cloud property histograms (JCH)

  • Monthly histogram (METEOSAT full disk)

Liquid water path (LWP)

  • Monthly mean diurnal-cycle (METEOSAT full disk),
  • Monthly mean (METEOSAT full disk),
  • Daily mean (METEOSAT full disk)