Digital Object Identifier
Entry information for CLAAS_V002_01

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DOI for scientific and technical data

10.5676/EUM_SAF_CM/CLAAS/V002_01

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.

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

Data record details and ordering

Products from Meteosat Second Generation (MSG)

Cloud mask (CMA)

Cloud phase (CPH)

Cloud top parameters CTT, CTP and CTH (CTO)

Cloud water path (CWP)

Fractional cloud cover (CFC)

Ice water path (IWP)

Instantaneous COT, CPH and CWP (CPP)

Instantaneous CTT, CTP and CTH (CTX)

Joint cloud property histograms (JCH)

Liquid water path (LWP)