=========================================================================================================== README for DATASET "Data from: Interactive Stratospheric Aerosol models response to different amount and altitude of SO2 injections during the 1991 Pinatubo eruption" =========================================================================================================== This readme file describes the dataset used in the following ACP paper: Quaglia, I., Timmreck, C., Niemeier, U., Visioni, D., Pitari, G., Brodowsky, C., Brühl, C., Dhomse, S., Franke, H., Laakso, A., Mann, G., Rozanov, E., and Sukhodolov, T.: Interactive Stratospheric Aerosol models response to different amount and altitude of SO2 injections during the 1991 Pinatubo eruption, Atmos. Chem. Phys. Discuss. [preprint], https://doi.org/10.5194/acp-2022-514, in review, 2022. Please cite this dataset as: Quaglia, I. et al., (2022) Data from: Interactive Stratospheric Aerosol models response to different amount and altitude of SO2 injections during the 1991 Pinatubo eruption, Atmospheric Chemistry and Physics Discussions [Dataset] Cornell University eCommons Digital Repository. https://doi.org/10.7298/mm1s-ae98 This dataset is shared under a Attribution 4.0 International (CC BY 4.0) license (https://creativecommons.org/licenses/by/4.0/). The material can be shared and built upon, but attribution to the original authors and a statement of changes made is required. All files in the dataset are NetCDF (Network Common Data Form) and can be easily read in common programming languages (python, Matlab, R, NCL, C++, and others). Data from 5 different simulations of the SO2 emission of Mt. Pinatubo in June 1991 (Low-21km, Med-21km, High-21km, Med-19km, Med-18-25km) are produced by six global models (ECHAM6-SALSA, EMAC, ECHAM5-HAM, SOCOL-AERv2, ULAQ-CCM and UM-UKCA). The name of the experiment have been changed during the writing of the paper, therefore the experiment name in the single files name appear in the following way: Low-21km -> El_Ism, Med-21km -> Em_Ism, High-21km -> Eh_Ism, Med-19km -> Em_Isl, Med-18-25km -> Em_Idp. The files are organised in several .zip files with the old names of the experiments, in which the results of each model are separated into different folders. The EMAC simulation is located in the Em_Ism folder. Data from simulations performed by ULAQ-CCM that include Pinatubo eruption and two emissione estimates of Cerro Hudson eruption in 1991 are located in folders Em_Ism_High-Hud and Em_Ism_Low-Hud. The stratospheric SO2 and sulfate burden for UM-UKCA are contained in ascii files in the folders UM-UKCA_burdn_strat_spread and UM-UKCA_burdn_strat_point. The ascii files contain 8 columns: 1) timestep , 2) month of the year -1 , 3) year, 4) global SO2 burden (Tg of sulfur), 5) global SO4 burden (Tg of sulfur), 6) tropical SO2 burden (Tg of sulfur), 7) tropical SO4 burden (Tg of sulfur), 8) SO2 burd NH midlatitudes, 8) SO4 burd NH midlatitudes, 10) SO2 burd SH midlatitudes, 11) SO4 burd SH midlatitudes. Post-processed data of netcdf files provided for model simulations are in the folder "ppvars" saved as MATLAB structures. Post-processed observations are in the folder "Observation" saved as ascii files. ==================================================================================================================== The netcdf files shared are zonal mean and their name and units may change depending on the model: Variable name dimensions long name units loadso2_str 2D-map Stratospheric SO2 load kg m-2 loadso4_str 2D-map Stratospheric sulfate load kg m-2 od525so4_str 2D-map Sulfate Strat AOD at 525 nm 1 ptp 2D-map Tropopause pressure Pa ec525so4 3D-map Sulfate extinction at 525 nm m-1 sad_so4 3D-map Sulfate SAD m2 m-3 reff_so4 3D-map Sulfate effective radius m ==================================================================================================================== Post-processed data of netcdf files provided above for model simulations are saved as matlab structures: - aod: includes strastospheric AOD variables for all models and experiments. - burd: includes strastospheric SO2 and sulfate burden variables in Tg-S for all models and experiments. - reff: includes all variables related to the radius in mum for all models and experiments. - ext: includes the extinction in 1/km for all models and experiments. - sad: includes the SAD in mum2/cm3 for all models and experiments. - vmroh: include the volume mixing ratio of tropical OH for all experiments in ECHAM5-HAM and ULAQ-CCM. Loading each structure, variables for each model and experiments are defined as .__ and variable names are self-explanatory. For reasons of simplicity in defining matlab variables, we define the experiments: 1 = "Cntrol", 2 = "High-22km", 3 = "Low-22km", 4 = "Med-22km", 5 = "Med-18-25km", 6 = "Med-19km" and we define the models: salsa = ECHAM6-SALSA; emac = EMAC; echam = ECHAM5-HAM; socol = SOCOL-AERv2; ulaq = ULAQ-CCM; ukca = UM-UKCA; ukcas = UM-UKCA* ==================================================================================================================== Post-processed observations are saved as follows: File name Description avhrr_saod: includes the monthly mean of zonal stratospheric AOD (saod), global and SH average saod (last two rows of the file). The first row include the months since January 1991, the first column includes the latitudes. glossac_saod: as avhrr_saod. hirs_sulf_burd: includes the monthly mean of total and tropical stratospheric sulfate burden and the corrisponding error in Tg-S. sage3l_sulf_burd: includes the monthly mean of zonal stratospheric sulfate burden, global, tropical, NH and SH burden (last four rows of the file). Units for the burden are Tg-S. The first row include the months since January 1991, the first column includes the latitudes. sageii_tropical_reff: includes the monthly mean of tropical effective radius and tropical stratospheric effective radius (last row of the file). Units for the radius are micrometers (mum). The first row include the months since January 1991, the first column includes the pressure levels. sageii_tropical_reff_err: as sageii_tropical_reff but for the errors on the radius. sageii_tropical_sad: includes the monthly mean of tropical SAD in mum2/cm3. The first row include the months since January 1991, the first column includes the pressure levels.. sageii_tropical_sad_err: as sageii_tropical_sad but for the errors on the sad. sageii_tropical_ext: includes the monthly mean of tropical extinction in 1/km. The first row includes the months since January 1991, the first column includes the pressure levels. sageii_tropical_ext_err: as sageii_tropical_sad but for the errors on the extinction. glossac_tropical_ext: includes the monthly mean of tropical extinction in 1/km. The first row includes the months since January 1991, the first column includes the pressure levels. glossac_tropical_ext_err: as glossac_tropical_sad but for the errors on the extinction. OPC_reff: includes the monthly mean of effective radius at Laramie in mum. The first row includes the days since January 1991, the first column includes the pressure levels.. OPC_reff_err: as OPC_reff but for the errors on the radius. OPC_strat_reff: includes the monthly mean of stratospheric effective radius and error (2 and 3 columns) at Laramie in mum. The first row includes the months since January 1991 OPC_sad: includes the monthly mean of SAD at Laramie in mum2/cm3. The first row include the months since January 1991, the first column includes the pressure levels.. OPC_sad_err: as OPC_sad but for the errors on the sad. ==================================================================================================================== Acknowledgments We would like to acknowledge high-performance computing support from Cheyenne (doi:10.5065/D6RX99HX) provided by NCAR's Computational and Information Systems Laboratory, sponsored by the National Science Foundation. Support for D. V. and D. G. M. was provided by the Atkinson Center for a Sustainable Future at Cornell University and by the National Science Foundation through agreement CBET-1818759. This research was supported in part by the Indiana University Environmental Resilience Institute and the Prepared for Environmental Change grand challenge initiative. The Pacific Northwest National Laboratory is operated for the U.S. Department of Energy by Battelle Memorial Institute under contract DE-AC05-76RL01830. The CESM project is supported primarily by the National Science Foundation. This work was supported by the National Center for Atmospheric Research, which is a major facility sponsored by the National Science Foundation under Cooperative Agreement No. 1852977.