See summary of corresponding experiment. This dataset is a postscript file of monthly mean values January 2001. The underlying data are part of the new reanalysis ERA40-project(ERA40_ML00_MM). The original dataset name is E40aSmd_2001_151 (monthly seperate, step00 surface, year 2001, Code 151). The postscript file was created for quality control of the IPCC experiment publication.