Single point simulation with own atmospheric forcing

[swieneke@meteo_uni-koeln_de]

Hello,

I converted meteorological data from csv to netcdf and tried to force my created surface data with this atmospheric data. Unfortunately the simulation stops with the error:

(datm_comp_init)  atm_in   = datm_atm_in
(datm_comp_init)  decomp   = 1d
(datm_comp_init)  iradsw   =        1
(datm_comp_init)  factorFn = unused
(datm_comp_init)  restfilm = undefined
(datm_comp_init)  restfils = undefined
(datm_comp_init)  presaero =  T
(shr_strdata_readnml) reading input namelist file: datm_atm_in
(shr_stream_init) Reading file clm1PT.1x1_rollesbroich.stream.txt
(shr_sys_abort) ERROR: (shr_stream_getCalendar)  ERROR: nf90_open file /home/swieneke/inputdata/atm/datm7/CLM1PT_data/1x1_rollesbroich/2012-01.nc
(shr_sys_abort) WARNING: calling shr_mpi_abort() and stopping

My netcdf looks like this:

dimensions:
	time = UNLIMITED ; // (4464 currently)
	lat = 1 ;
	lon = 1 ;
variables:
	int time(time) ;
		time:units = "minutes since 2012-01-01 00:00:00.0" ;
		time:calendar = "gregorian" ;
	float latitude(lat) ;
	float longitude(lon) ;
	float ZBOT(time) ;
		ZBOT:units = "m" ;
	float TBOT(time) ;
		TBOT:units = "K" ;
	float WIND(time) ;
		WIND:units = "m/s" ;
	float FSDS(time) ;
		FSDS:units = "W/m^2" ;
	float FLDS(time) ;
		FLDS:units = "W/m^2" ;
	float PSRF(time) ;
		PSRF:units = "Pa" ;
	float PRECTmms(time) ;
		PRECTmms:units = "mm/s" ;
	float RH(time) ;
		RH:units = "%" ;
}

I guess my NetCDF file is incorrect, anyone an idea where the error occur?

Another question:
My CASE is configured to start on 2012-05-01 and end after one month. Is it correct that even if i want to simulate one month i have to provide data for the whole year?

Cheers

Sebastian

 

[leihm@tsinghua_edu_cn]

Hi, Sebastian,

The time units should be "days since yyyy-mm-dd 00:00:00". At least, it should be like this for my regional case.

 

[swieneke@meteo_uni-koeln_de]

Hi thunderhm,

thanks for your advice. I changed the NetCDF to days, but unfortunately I get the same error. My atmospheric input is in 10 minute interval. Can CLM4 handle this time resolution? Or is 30 min the minimum?

Cheers

Sebastian

 

[leihm@tsinghua_edu_cn]

Hi Sebastian

We are using the datm data with 1 hour interval. It works. The time units are "0.04166667, 0.08333334, 0.125 ... 29.95833" in a monthly data file. I guess CLM4.0 can handle any time solutions.
So ,in your case, maybe it is due to other problems.

Huimin, Lei

 

[swieneke@meteo_uni-koeln_de]

Hi Huimin, Lei

My Time Units look similar. But I expect that there is another error in my NetCDF or perhaps in the stream files. In the Users Guide is writen that you have to edit the streaming files. But when I edit the variable names and started the simulation, the scripts overwrite them with a default stream file. Do i edit the dtreamingfile in the wrong directory? (/home/$USER/cesm1_0_4/$CASE/run)

Thanks for your help Huimin, Lei. Iam grateful for any help/advice.

Sebastian

 

[leihm@tsinghua_edu_cn]

Hi, Sebastian,
I think you can edit the stream file in the run directory. But If you re-build the model after your revision, the stream file will be overwritten by the file in the directory: case/Tools/Templates.
So I recommend to edit the stream file in this direcctory if you have already new a case. Note: if you new a case, you should edit again becuase the file in case/Tools/Templates is actually from models/atm/datm/bld/

 

[swieneke@meteo_uni-koeln_de]

Thanks Huimin, Lei

this is really good to know. Thank you very much.

I solved my problem. I converted my NetCDF file into version 4 instead of NetCDF3classic.


Sebastian