Re: [CF-metadata] handling time in a CF compliant fashion

2011-02-18 Thread Dave Allured
Janine, The data model envisioned by CF requires that the time coordinate variable be fully enumerated. In other words, your scenario requires "a time dimension at the highest rate", including a time coordinate value for every time step. time(:) = 0.00, 0.04, 0.08 seconds, etc. I am not aw

Re: [CF-metadata] CF standard_name irradiation ?

2011-02-18 Thread stefan.kinne
Martin, this is a bit more complicated the radiative fluxes used in climate studies are usually spectrally integrated and usually for these bradband fluxes there is a distinction between solar broadband and IR broadband fluxes. now for these broadband fluxes we also like to distinguish between

[CF-metadata] ... wind speed

2011-02-18 Thread Schultz, Martin
Hi again, more on the CASTNET data. They provide 15,WINDSPEED,m/sec,"Vector wind speed; m/sec.",NUMBER,"16,4", and 23,WINDSPEED_SCALAR,m/sec,"Scalar wind speed; m/sec.",NUMBER,"16,4", The first appears to be a vector average = sqrt( mean(u)**2 + mean(v)**2 ) the second is = mean( sqrt(u*

Re: [CF-metadata] CF standard_name irradiation ?

2011-02-18 Thread Schultz, Martin
Nan, unfortunately I don't know the instrument type. I am dealing with the CASTNET data http://java.epa.gov/castnet/ and I am primarily interested in ozone. A brief search didn't turn up any info on the instrument type. But "downwelling_shortwave_flux_in_air" or "surface_downwelling_shortwa

Re: [CF-metadata] CF standard_name irradiation ?

2011-02-18 Thread Schultz, Martin
Hi Roy, thanks - yes: I think that would do. I am not an expert in this field and don't know if the light meter spectral response is close enough to what models generally consider "shortwave flux", but this might be a rather fine point. In any case it would be good if a search for "irradi

Re: [CF-metadata] CF standard_name irradiation ?

2011-02-18 Thread Nan Galbraith
Hello - It would be useful to know what type of measurement you're working with. Is it an observed variable? What kind instrument made the measurement, and at what position - i.e is it on a surface buoy? We use surface_downwelling_shortwave_flux_in_air for swr measured by an Eppley PSP (Precisio

Re: [CF-metadata] CF standard_name irradiation ?

2011-02-18 Thread Lowry, Roy K.
Hi Martin, There are two Standard Names 'downwelling_shortwave_flux_in_air' and 'downwelling_longwave_flux_in_air'. Do either of these fit your data. I have associated the former with downwelling irradiance data from PAR cosine-collector light meters. Cheers, Roy. -Original Message-

[CF-metadata] CF standard_name irradiation ?

2011-02-18 Thread Schultz, Martin
Dear colleagues, I am trying to clean up some data files and make them CF compliant. But I am confused about the standard name that I could use for (measured) irradiation. There is an entry "downwelling_spectral_radiative_flux_in_air Downwelling radiation is radiation from above. It does no