Re: [CF-metadata] tendency_of_sea_water_conservative_temperature_expressed_as_heat_content units

2018-06-25 Thread Jonathan Gregory
Dear Martin I agree with your suggestions and clarifications. It would be good to keep "heat content" because it is widely understood (in the sense that we use it, J m-2). I agree that "content" implies the amount of something per unit area integrated over the vertical extent of something else. It

Re: [CF-metadata] Precipitation fractions for LS3MIP

2018-06-25 Thread Karl Taylor
Hi Jonathan, I had objected to mass_fraction earlier, but if it is immediately followed, for example, by "of_rainfall" it won't get confused with the mass_fraction used to describe a single species in a mixture. I don't like "amount" because although it is a ratio, I think it normally descri

Re: [CF-metadata] Precipitation fractions for LS3MIP

2018-06-25 Thread Jonathan Gregory
Dear Alison et al. I still find myself tripping over rainfall_mass. Why not rainfall_amount, rainfall_flux or rainfall_rate? They would all be the same number, since it's a *fraction*. Another possibility would be a reordering to mass_fraction_of_rainfall_falling_onto_surface_snow (1) mass_fra

Re: [CF-metadata] Final 17 terms for CMIP6 LS3MIP.

2018-06-25 Thread Jonathan Gregory
Dear Alison and Martin > 3.1 hfrs Heat transferred to snowpack by rainfall [W m-2] > > Martin has suggested the following: > surface_downward_sensible_heat_flux_due_to_rainfall_temperature_anomaly > The rainfall temperature anomaly is the temperature of the snow relative to > the zero Celsius. T

Re: [CF-metadata] SIMIP: 5 standard names and one area type for CMIP6

2018-06-25 Thread Jonathan Gregory
Dear Alison and Dirk > It has taken me a little while to understand this name, but I am beginning to > grasp it! > sea_ice_horizontal_shear_strain_rate_maximum_over_coordinate_rotation (s-1) I think the concept and definition are fine, but the name could maybe be made a bit clearer. The last sen

Re: [CF-metadata] tendency_of_sea_water_conservative_temperature_expressed_as_heat_content units

2018-06-25 Thread Martin Juckes - UKRI STFC
Hello Jonathan, I agree that the "integral_wrt_depth_" is a little surprising here, but I think it is better than saying temperature when we mean "temperature times thickness". In any case, we have a term: tendency_of_sea_water_potential_temperature_expressed_as_heat_content which is intende

Re: [CF-metadata] tendency_of_sea_water_conservative_temperature_expressed_as_heat_content units

2018-06-25 Thread Jonathan Gregory
Dear Alison and Steve I suggest that we can be more relaxed about units for X_expressed_as_Y, so that X and Y don't have to be dimensionally equivalent. We can express the change in temperature of an ocean layer as a change in heat content by using the heat capacity - that's the idea of these name

Re: [CF-metadata] tendency_of_sea_water_conservative_temperature_expressed_as_heat_content units

2018-06-25 Thread Alison Pamment - UKRI STFC
Dear Stephen, Thank you for getting back to me. A CF standard name for integral_wrt_depth need not necessarily be interpreted as a full ocean depth quantity. The limits of the integral are specified by placing bounds on the vertical coordinate variablle that is attached to the data variable. T

Re: [CF-metadata] SIMIP: 5 standard names and one area type for CMIP6

2018-06-25 Thread Alison Pamment - UKRI STFC
Dear Dirk, Thank you to you and Bruno for looking at these definitions again. I willl make the changes you have requested. All three names are now accepted for publication in the standard name table and will be added in the 2nd July update. I am pleased to say that we have now agreed all the n