Hi Martina, Couple of points. Would the term 'total' be better than 'lumped' - lumped to me is slang. We've also used 'total' before to convey similar semantics (e.g. total_reactive _nitrogen).
Definitions of anthropogenic, biogenic, passive, oxygenated would be useful. Cheers, Roy. >>> Martina Stockhause <[EMAIL PROTECTED]> 09/17/08 2:38 PM >>> Dear all, a group of chemical modellers discussed the standardization of the chemical constituents and aerosols in the GRIB2 standard. I assist them. As sources we used the parameters used in different intercomparison projects: GEMS (http://gems.ecmwf.int/), CCMVal (http://www.pa.op.dlr.de/CCMVal/), TFHTAP (http://www.htap.org). Martin Suttie from ECMWF / GEMS created a two tables approach for GRIB2: one for the physical quantity and one for the chemical constituent or aerosol. Thus, a physical-chemical quantity (= CF standard name) is a combination of these two parameters. Since, we want to connect GRIB2 standard closely to the CF standard names, we used CF standard names in the proposal for WMO and propose here the missing CF standard names used in our WMO proposal. 1. NEW physical parameters for chemical constituent X: I read the discussion about 'burden' in the mailing archive. It seems that the scientists stick to 'burden' as a common term in the community and have started to use it for the creation of CF-like standard names (e.g. in CCMVal), because CF couldn't offer an acceptable alternative. Neither 'global_integral' nor 'burden' could be agreed on in the CF mailing list. Sorry, for starting that discussion again without offering a new alternative. Since the CF standard names should be self-explanatory for those who create and analyse data, we propose the standard name 'total_yearly_average_burden_of_X_in_atmosphere' among others: column_integrated_mass_density_of_X_in_air : kg.m-2 tendency_of_atmosphere_mass_content_of_X_due_to_respiration : kg.m-2.s-1 tendency_of_mole_concentration_of_X_due_to_chemical_gross_production : mol.m-3.s-1 tendency_of_mole_concentration_of_X_due_to_chemical_gross_destruction : mol.m-3.s-1 total_yearly_average_burden_of_X_in_atmosphere : mol total_yearly_averaged_atmospheric_loss_of_X : mol.s-1 surface_area_density_of_X : m-1 2. NEW chemical constituents: We suggest to use the keyword 'lumped' to indicate a certain group of species showing similar chemical behaviour (PRISM definition). And to introduce 'anthropogenic' and 'biogenic' for the origin of the organic compound NMVOC. atomic_oxygen nitrate_radical nitrous_acid radon methyl_peroxy_radical methanol formic_acid aceto_nitrile ethanol acetic_acid butane alpha_pinene beta_pinene limonene hcfc141b hcfc142b nitric_acid_trihydrate_aerosol hox_expressed_as_hydrogen : HOx radical (OH+HO2) total_peroxy_radical : Total inorganic and organic peroxy radicals (HO2 + RO2) passive_ozone noy_expressed_as_nitrogen : All nitrogen oxides (NOy) expressed as nitrogen clox_expressed_as_chlorine : Total inorganic chlorine except HCl, ClONO2: ClOx brox_expressed_as_bromine : Total inorganic bromine except HBr, BrONO2: BrOx lumped_alkanes lumped_alkenes lumped_aromatic_compounds lumped_terpenes nmvoc_expressed_as_carbon : Non-methane volatile organic compounds expressed as carbon anthropogenic_nmvoc_expressed_as_carbon : anthropogenic nmvoc_expressed_as_carbon biogenic_nmvoc_expressed_as_carbon : biogenic nmvoc_expressed_as_carbon lumped_oxygenated_hydrocarbons 3. NEW CF standard names: The individual CF standard names, resulting from the combination of physical quantity and chemical constituent or aerosol, are quite many (see attached file). I apologize for this long list. My idea to move the name of the chemical constituent or aerosol from the standard name into an attribute was dismissed by the scientists. The disadvantage of a CF standard name without the constituent was larger than the advantage of a smaller number of CF standard names to be proposed. Since I had to use a script for the generation of these individual CF names, there might be some names in the list, which doesn't make sense. Therefore a counter-check is necessary and highly appreciated. Thank you and best wishes, Martina -- This message (and any attachments) is for the recipient only. NERC is subject to the Freedom of Information Act 2000 and the contents of this email and any reply you make may be disclosed by NERC unless it is exempt from release under the Act. Any material supplied to NERC may be stored in an electronic records management system. _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata