nighttime and daytime average from hourly data
Added by David RAGATOA about 2 years ago
Hi everyone,
I have an hourly ERA5 dataset and would like to compute the daytime (from 06:00 to 18:00) and nighttime (from 18:00 to 06:00) average.
I used daymean with -selhour,6/18 ( -selhour,19/06 -shifttime,-5 to shift to time back to 19:00 and take from 19:00 to 06:00).
The daytime average seems good but I am not sure of the nighttime results. The time bounds of the nighttimes are 1 January 1980 06:00:00 --> 19:00:00.
Any idea what the issue is?
Or how to compute the daytime/nighttime average on daily bases?
Please your help is appreciated.
Thank you
Replies (2)
RE: nighttime and daytime average from hourly data - Added by Ralf Mueller about 2 years ago
hi David!
First things first: a data upload makes things a lot clearer in most cases. time bounds are a bit hard to create in analytic data to reproduce your results
BTW: I am not sure that your approach works, but without the exact CDO calls its hard to say
cheers
ralf
RE: nighttime and daytime average from hourly data - Added by Ralf Mueller about 2 years ago
IMO something like this should do the trick:
cdo -s -shifttime,+12hours -selhour,6/18 -shifttime,-12hour <ifile> <ofile>
I ignore any bounds problems here