CHELSA (climatic surfaces at 1 km resolution) is based on a quasi-mechanistical +statistical downscaling of the ERA interim global circulation model +(Karger et al. 2016). ESA's CCI-LC cloud probability monthly averages are based +on the MODIS snow products (MOD10A2). http://chelsa-climate.org/
+ +http://maps.elie.ucl.ac.be/CCI/viewer/index.php
+ +90m hole-filled SRTM digital elevation (Jarvis et al. 2008) was used +to identify and correct/remove elevation errors in data for station +locations between -60˚ and 60˚ latitude. This applies to cases here +where elevation was missing in the reported values as well. In case the +station reported an elevation and the DEM does not, the station reported +is taken. For stations beyond -60˚ and 60˚ latitude, the values are +station reported values in every instance. See +https://github.com/adamhsparks/GSODR/blob/devel/data-raw/fetch_isd-history.md +for more detail on the correction methods.
+ +Users of these data should take into account the following (from the +NCDC website):
+ +++“The following data and products may have conditions placed on their +international commercial use. They can be used within the U.S. or for +non-commercial international activities without restriction. The +non-U.S. data cannot be redistributed for commercial purposes. +Re-distribution of these data by others must provide this same +notification.” WMO Resolution 40. NOAA +Policy
+