Summary: distribution alone does not take into account the ability of 4 dimensional data assimilation systems to transport information from data rich to data sparse regions Kistler et al 1999 Fig 2 displays global mean precipitation and evaporation from the NCEP NCAR reanalysis for 1948 Apr 1998 A 12 month running mean has been applied to eliminate a very regular pronounced
Image Dimensions: 921 x 691
Image originally found here.