monthly CAM history files

[climatemodelling@gmx_com]

I have a question regarding the CAM history files:

The monthly output files have the following format:

cam2.h0.1978-01.nc
cam2.h0.1978-02.nc
cam2.h0.1978-03.nc,

indicating that the first file contains the average January values, the second the average February values and so on. However opening the files for instance with Ferret, the calendar shows 1.Feb 1978 for the first file. Is this only a calendar issue? Usually from my experience the calendar for monthly mean values would be set to 15. Jan?

Also I wanted to ask if 10m u and v components of the winds are available as a variable output? The standard output includes only the wind fields on the pressure levels (in my case the lowest pressure level at 992 hPa.).

Thanks!

 

[eaton]

Here is another post with information regarding the date in monthly files: https://bb.cgd.ucar.edu/output-date-error-monthly-history-files-shifted-1-month

 

[hannay]

## About the monthly mean date:
This is not a calendar issue.
The time coordinate corresponds to the end of the averaging period.
For: cam2.h0.1978-01.nc it will be 1.Feb 1978.
The variable time_bnds tells you about the bounds of the averaging period.## About 10 meter wind.
You can output the variable U10 which is the 10-meter wind. However, CAM doesn't output the individual components (zonal and meridional) at 10 m.

 

[climatemodelling@gmx_com]

Thank you for the information and the link to the other thread!Apparently a number of common data analysis tools (e.g. Ferret and CDO) have a problem with the time_bnds attribute.