Analysis of global cloudiness: 1. Comparison of Meteor, Nimbus 7, and International Satellite Cloud Climatology Project (ISCCP) satellite data

The ISCCP 1-4 intercomparison shows that 1) the cloudiness differences due to the above temporal sampling are smaller than those due to the above spectral sampling; 2) both spectral and temporal sampling effects are larger for the northern hemisphere than for the southern hemisphere; and 3) the difference between zonal mean cloudiness with and without visible information generally increases with latitude from polar night to about 60° latitude in the summer hemisphere. -from Authors