We have recently added some additional forecast fields available to the ERA-40 dataset held at the BADC. Due to user demand additional single/surface level forecasts have been extracted as follows in the ERA-40 archive:
“Maximum/Minimum temperature at 2m since previous post-processing”
(MX2T/MN2T) are available at additional forecast steps of +3/+6/+9/+12 hours from both the 00hr and 12hr analyses. Sampling the data at this frequency captures the maximum (or minimum) between each post-processing step (3-hourly frequency).
A number of other variables are available at additional forecast steps of +6/+12/+18/+24/+30/+36 hours from both the 00hr and 12hr analyses. These variables are mainly moisture-related fields that are accumulated with time. The data was extracted to allow greater investigation into moisture-related fields within the ERA-40 dataset.
The variables are:
Snow evaporation (accum.) [ES]
Snow melt (accum.) [SMLT]
Large scale precipitation fraction (accum.) [LSPF]