Digital Object Identifier
Entry information for CLAAS_V002_01

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

Title

CLAAS-2.1: CM SAF CLoud property dAtAset using SEVIRI - Edition 2.1

Citation

Finkensieper, Stephan; Meirink, Jan-Fokke; van Zadelhoff, Gerd-Jan; Hanschmann, Timo; Benas, Nikolaos; Stengel, Martin; Fuchs, Petra; Hollmann, Rainer; Kaiser, Johannes; Werscheck, Martin (2020): CLAAS-2.1: CM SAF CLoud property dAtAset using SEVIRI - Edition 2.1, Satellite Application Facility on Climate Monitoring, DOI:10.5676/EUM_SAF_CM/CLAAS/V002_01, https://doi.org/10.5676/EUM_SAF_CM/CLAAS/V002_01. [BibTeX entry]

Publisher

Satellite Application Facility on Climate Monitoring (CM SAF)

Publication year

2020

Author(s)

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

Description

The CLAAS-2.1 record provides cloud properties derived from the SEVIRI sensor onboard METEOSAT second generation (MSG) satellites. This first update of the second edition (Benas et al., 2017; CLAAS-2 DOI:10.5676/EUM_SAF_CM/CLAAS/V002; see also Stengel et al., 2014) features a temporal extension by two years (the record is now covering 2004-2017) and a bugfix for the monthly CTO products. As for previous editions of CLAAS, the solar SEVIRI channels of MSG-1, MSG-2 and MSG-3 were intercalibrated with MODIS Aqua (following Meirink et al., 2013) before applying the cloud retrievals. CLAAS-2.1 features the following cloud properties: 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 results of the comprehensive evaluation conducted for CLAAS-2 which were reported in Benas et al. (2017), remain valid for CLAAS-2.1. Along with the data, updated documentation including user guide, algorithm descriptions, reprocessing layout and extensive validation studies, is provided. With CLAAS-2.1, 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 in edition 1, are released in a separate dataset (SARAH-2.1).

Format

NetCDF-4

Version

3.1

Temporal coverage

2004-01-19 - 2017-12-31

Geographic coverage

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

Size

27.3 TB

Documentation

Related publications

Auxiliary data

Related Data Records

Comment

This Thematic Climate Data Record is extended by the ICDR SEVIRI Clouds - based on CLAAS-2 methods.

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