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If you have time, try the following.
Computing the monthly mean temperature
Examine the supplied GRIB file monthly_temperature.grib. It contains low-resolution temperature fields over an area of Europe for each day in January 2015. Try the following in a new macro:
- compute the monthly mean temperature field.
- notice that the data contains two different time steps: 00:00 and 12:00. Separate the data into the two different time steps and compute the mean field for each. The result should be two fields - one is the mean of all the 00:00 fields and the other is the mean of all the 12:00 fields.
- for each of the original fields, compute the difference between it and the corresponding mean field for that time step. Plot it with Contouring icons appropriate for showing temperature anomalies.