Table 1: Cloudiness data information.

DatasetTime periodData resolution
Short nameFull name

Satellite observations
APP-xExtended Advanced very high-resolution radiometer (AVHRR) Polar Pathfinder Product01/1982–12/200425 km
CERES Terra
CERES Aqua
Clouds and the Earth’s Radiant Energy System SSF Product Edition 2.5 (board on Terra and Aqua)02/2000–02/2010
07/2002–02/2010
ISCCPInternational Satellite Cloud Climatology Project D2 Product07/1983–06/20082.5°
MODIS Terra
MODIS Aqua
Moderate-Resolution Imaging Spectroradiometer series 5 product (board on Terra and Aqua)02/2000–12/2009
07/2002–12/2009
PATMOS-xAVHRR Pathfinder Atmosphere extended (version 5)01/1982–12/2009

Surface observations
EECRAExtended Edited Cloud Report Archive01/1971–12/1996

Reanalyses data
ERA-40European Centre for Medium-Range Weather Forecasts (ECMWF) Reanalyses01/1979–08/20022.5°
ERA-Interim01/1989–12/20091.5°
JRA-25Japan Meteorological Agency Reanalysis01/1979–12/20092.5°
NASA-MERRANational Aeronautics and Space Administration (NASA) Modern Era Reanalysis for Research and Applications01/1979–03/20090.5°
NCEP-CFSRNational Centers for Environmental Prediction (NCEP) Climate Forecast System Reanalysis01/1979–12/20090.5°
NCEP/DOENCEP/Department of Energy01/1979–01/2008~1.9° (Gaussian)
NCEP/NCARNCEP/National Center for Atmospheric Research01/1979–12/2008~1.9° (Gaussian)
NOAA-CIRES 20CRNational Oceanic and Atmospheric Administration-Cooperative Institute for Research in Environmental Sciences (NOAA-CIRES) 20th Century Reanalysis01/1979–12/2008~1.9° (Gaussian)