Hi Andrew,
Thank you very much for your reply and sorry for my belated answer!
I do not manage to do what you suggest because I have a problem with reading the time dimension. The file I upload ranges from january 2000 to december 2010.
However, it shows me only some time values in 1900 (which is not correct since only monthly values are available).
I should be able to adapt this under the 'Time-tab' but each time I change the 'Time Step Interval' to 'Months', it changes it back to 'Minutes'.