I downloaded an edmo dataset of 1 ensemble of the cera-20c model. I want to convert these data, which are in [m], to mm/month. Further specifications: 0.125/0.125 grid, -29/30/-30/31 area. Example of the data (see picture) of total precipitation January 1980:
My method: Taking the average of these numbers multiplying by 31 (days in January) and 1000 (from m to mm) gives me 299 mm for January. But this does not seem right. It seems overestimated. I hope you can help me with the right answer. I read something about multiplying by the scale factor and adding the add_offset. But the scale factor is so small (10E-7) that all numbers approximately similar.
Thanks a lot in advance for any ideas. Louwrens Timmer