See Brief request syntax to understand each keyword.
ERA-40 Pressure levels
Relative humidity, 2m temperature, 10m u wind component, 10m v wind component. 60 levels. August 2002.
ECMWF Public Dataset web interface
#!/usr/bin/env python from ecmwfapi import ECMWFDataServer server = ECMWFDataServer() server.retrieve({ 'stream' : "oper", 'levelist' : "1/2/3/5/7/10/20/30/50/70/100/150/200/250/300/400/500/600/700/775/850/925/1000", 'levtype' : "pl", 'param' : "130.128/131.128/132.128/157.128", 'dataset' : "era40", 'step' : "0", 'time' : "00/06/12/18", 'date' : "2002-08-01/to/2002-08-31", 'type' : "an", 'class' : "e4", 'target' : "era40_2002-08-01to2002-08-31_00061218.grib" })
ERA-40 Surface
2m temperature. February 2002.