Dataset for: "A multi-model assessment shows non-negligble Global Warming Potential of Hydrogen" --------------------------------------------- This dataset consists of dataset output in the hydrogen model comparison outlined in paper "A multi-model assessment shows non-negligble Global Warming Potential of Hydrogen" by Maria Sand, Ragnhild Bieltvedt Skeie, Marit Sandstad, Srinath Krishnan, Gunnar Myhre, Hannah Bryant, Richard Derwent, Didier Hauglustaine, Fabien Paulot, Michael Prather and David Stevenson, Communications Earth and Environment, 2023. Each subfolder contains data for each contributing model. For the models gfdl and oslo-ctm3 there are subfolders emissions and concentrations for emission driven and concentration driven runs. In general the concentration driven runs (run by all models) included three experiments. 1 base run with concentration fields with prescribed methane fields set at 2011 values and hydrogen fields set from a latitudinal smooth field defined from esrl observation data. Then two experiments where the hydrogen and the methane fields are increased by 10% each. The emission driven runs are set up a bit differently. Some model specifics are listed under each subheading gfdl ---- The hydrogen perturbation in the concentration driven runs used in the paper is a 40% increase in hydrogen. We include also results for a 25% and a 10% increase, but results there were somewhat masked by variability in the runs. The experiments are called c1 (control), p2 (10% hydrogen increase), p2b (25% hydrogen increase), p2c (40% hydrogen increase) and p3 (10% methane increase). For emission driven runs the experiments are a base run, a run with an 200 Tg/year increase in hydrogen emissions, and finally a run with 200 Tg/yr extra hydrogen emissions while simultaneously increasng the methane concentrations from 1808 ppbv to 2005 ppbv which should be reflective of the induced methane change from the hydrogen emission increase. These experiments are called (gfdl1, gfdl2 and gfdl3 respectively). Nameing scheme for the all gfdl files are variablename_timefrequency_model_hydrogen-experimentname_gn_STARTDATERUN-ENDDATERUN.nc where the model is GFDL-ESM4-2010climo for the emission driven runs and GFDL-ESM4-2010nudge for the concentration driven runs. The STARTDATERUN-ENDDATERUN of the emission driven experiment is 000101-005012 (i.e. 50 years of data), and Example filename h2_Amon_GFDL-ESM4-2010climo_hydrogen-gfdl1_gn_000101-005012.nc inca ---- inca ran the standard concentration driven experiments. All data have been averaged over the last x years of a total y year run. Files are organized in one file per experiment and time resolution. I.e. for each experiment there is one monthly file of 2d variables, one monthly file of 3d variables, one file with yearly means of 3d values and one file with global means of 3d yearly averages. The nameing scheme is HYDROexperiment_LMDZORINCA_aertimeresolutiondimensionality.nc where the experiments are called a4 (base experiment), b4v2 (10% increased hydrogen surface concentration), and d4 (10% increased surface methane concentration), timeresolution can be monthly, yearly or yeargla (for yearly global averages) and the dimensionality can be 2d or 3d. Example filename HYDROd4_LMDZORINCA_aermonthly3d.nc oslo-ctm3 --------- The oslo-ctm3 data are data from the last year of a multiyear run per variable and experiment. The concentration driven runs were run for 20 years and the emission driven runs for 25 years. The concentration driven experiments are called c1 (base), p1 (10% increase in surface hydrogen concentrations) and p2 (10% increase in surface methane concentrations). Emissions driven runs are called base and pert where pert was a 10% increase in anthropogenic emissions. Naming scheme is variable_Amon_OsloCTM3_setup_yrnumber_hydrogen-experiment_r1_gn_201001-201012.nc where setup is emis for emission runs and v2 for concentration runs. All files are on monthly resolution. Example filename h2_Amon_OsloCTM3_emis_yr25_hydrogen-base_r1_gn_201001-201012.nc ukca ---- The ukca data are data for the last year of an x-year run. They are monthlyresolution for a selection of the most variables. The ukca model in our setup could not model stratospheric water vapour changes. Experiments are called c1 (base), p2 (10% increase in surface hydrogen concentrations) and p3 (10% increase in surface methane concentrations). Naming scheme is variable_Amon_ukca_hydrogen-experiment_gn_201401-201412.nc. All files are on monthly resolution. Example filename h2_Amon_ukca_hydrogen-c1_gn_201401-201412.nc waccm6 ------ The waccm data include monthly data for an 18 year run. Experiments are called c1 (base), p2 (10% increase in surface hydrogen concentrations) and p3 (10% increase in surface methane concentrations). Naming scheme is variable_Amon_WACCM6-MA-sd_hydrogen_experiment_gn_201101-202812.nc. Example filename h2_Amon_WACCM6-MA-sd_hydrogen_c1_gn_201101-202812.nc input_concentration_fields -------------------------- Include 1by1 resolution input concentration fields for methane and hydrogen ued in the concentration driven experiments. For some models a different year of methane concentrations may have been used (the year before or after) from standard model files.