README: MÉRA Archive

Author: Eoin Whelan, Met Éireann

Please refer any questions to: mera@met.ie

The MÉRA grid:
 Nlon,Nlat,Nlev :         529         489          65
 South,West     :   46.834000000000003       -14.609000000000000     
 North,East     :   59.594951764639291        2.1287607787295477     
 Dlon,Dlat      :   2500.0000000000000        2500.0000000000000     
 Projlon,Projlat(1,2)    :   5.0000000000000000        53.500000000000000        53.500000000000000     
 Grid staggering is of type arakawa:C

Data format: GRIB 1

Data available:
Parameter description       - short - Data location
============================-=======-=======================
Pressure at mean sea level  - PMSL  - /mera/grib/1/103/0/0
Temperature at 2m           - T2m   - /mera/grib/11/105/2/0
U-component of wind at 10m  - U10m  - /mera/grib/33/105/10/0
V-component of wind at 10m  - V10m  - /mera/grib/34/105/10/0
Relative humidity at 2m     - RH2m  - /mera/grib/52/105/2/0
Total percipitation         - TP    - /mera/grib/61/105/0/4

Soil temperature at surface - TG0   - /mera/grib/11/105/800/0
Soil temperature at level 1 - TG1   - /mera/grib/11/105/801/0
Soil moisture at level 1    - WG1   - /mera/grib/86/105/801/0

Acc. surface  rad           - DNI   - /mera/grib/115/105/0/4
Acc. surface  rad           - DNI   - /mera/grib/116/105/0/4
Acc. surface  rad           - DNI   - /mera/grib/117/105/0/4
Direct normal irradiance    - DNI   - /mera/grib/140/105/0/4

Temperature at 50 m         - T050m - /mera/grib/11/105/50/0
U-component of wind at 50 m - U050m - /mera/grib/33/105/50/0
V-component of wind at 50 m - V050m - /mera/grib/34/105/50/0
Temperature at 100 m        - T100m - /mera/grib/11/105/100/0
U-component of wind at 100 m- U100m - /mera/grib/33/105/100/0
V-component of wind at 100 m- V100m - /mera/grib/34/105/100/0
Temperature at 200 m        - T200m - /mera/grib/11/105/200/0
U-component of wind at 200 m- U200m - /mera/grib/33/105/200/0
V-component of wind at 200 m- V200m - /mera/grib/34/105/200/0

The data for each parameter are gathered into monthly files using the following 
naming convention: MERA_PRODYEAR_$YYYY_$MM_$PAR_$TYP_$LEV_$TRI_$DATA
    * YYYY = Year (%Y, four-digit)
    * MM   = Month (%m, two-digit)
    * PAR  = Parameter indicator (indicatorOfParameter), see table2Version = 1 or 253
    * TYP  = Level type indicator (indicatorOfTypeOfLevel)
    * LEV  = Level indicator (level)
    * TRI  = Time range indicator (timeRangeIndicator)
    * DATA = ANALYSIS/FC3hr/FC33hr