Dataset for "Reduced ice loss from Greenland under stratospheric aerosol injection"

2023-11-27 1 Dataset for “Reduced ice loss from Greenland under stratospheric aerosol injection” (Journal of Geophysical Research: Earth Surface, 128 (11), e2023JF007112, doi: 10.1029/2023JF007112) – README – John C. Moore1, Ralf Greve2,3, Chao Yue4, Thomas Zwinger5, Fabien Gillet-Chaulet6, Liyun Zhao4 1 Arctic Centre, University of Lapland, Rovaniemi, Finland 2 Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan 3 Arctic Research Center, Hokkaido University, Sapporo, Japan 4 State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, China 5 CSC–IT Center for Science, Espoo, Finland 6 Grenoble Alpes University, CNRS, INRAE, IRD, Grenoble INP, IGE, Grenoble, France 14 model experiments (each run with the ice-sheet models SICOPOLIS and Elmer/Ice; for details see the manuscript) • HIST: Historical simulation 1990–2015. • CTRL: Unforced projection control experiment 2015–2090. • <GCM>-<Scenario>-Rmed: Future climate experiments 2015–2090, where <GCM> = {BNU-ESM, HadGEM2-ES, MIROC-ESM, MIROC-ESM-CHEM} and <Scenario> = {RCP85, RCP45, G4}. Variables The variable names follow closely the ISMIP6 convention (e.g., Table A1 of https://tinyurl.com/ismip6-wiki-gris). However, years are used instead of seconds as the time unit (1 a = 3.1556925445 × 107 s). Time itself is counted in days since 1990-01-01 00:00:00, using a 365-day calendar (no leap years, i.e., all years are 365 days long). 2D variables for SICOPOLIS are provided on the native 5-km grid (EPSG:3413), while for Elmer/Ice, they were resampled from the unstructured finite-element mesh to this grid. 2 2D state variables (in Output_{SICOPOLIS, ElmerIce}_2D.zip) lithk – Ice thickness (m) orog – Surface elevation (m) base – Ice base elevation (m) topg – Bedrock elevation (m) xvelsurf – Surface velocity in x-direction (m a−1) * yvelsurf – Surface velocity in y-direction (m a−1) * zvelsurf – Surface velocity in z-direction (m a−1) * velsurf – Surface velocity in horizontal direction (m a−1) * xvelbase – Basal velocity in x-direction (m a−1) * yvelbase – Basal velocity in y-direction (m a−1) * zvelbase – Basal velocity in z-direction (m a−1) * velbase – Basal velocity in horizontal direction (m a−1) * xvelmean – Mean velocity in x-direction (m a−1) yvelmean – Mean velocity in y-direction (m a−1) velmean – Mean velocity in horizontal direction (m a−1) litemptop – Surface temperature (K) * litempbot – Basal temperature (K) * strbasemag – Basal drag (Pa) sftgif – Land ice area fraction (–) sftgrf – Grounded ice area fraction (–) † sftflf – Floating ice area fraction (–) † These variables are provided as yearly snapshots for the years 2016–2090 [historical: 1991– 2015]. Time variable: ‘time’. 2D flux variables (in Output_{SICOPOLIS, ElmerIce}_2D.zip) acabf – Surface mass balance flux (kg m−2 a−1) libmassbfgr – Basal mass balance flux beneath grounded ice (kg m−2 a−1) libmassbffl – Basal mass balance flux beneath floating ice (kg m−2 a−1) † lifmassbf – Mass loss due to calving and ice front melting (kg m−2 a−1) ligroundf – Mass flux through the grounding line (kg m−2 a−1) † dlithkdt – Ice thickness imbalance (m a−1) hfgeoubed – Geothermal heat flux (W m−2) * These variables are provided as yearly averages over the intervals bounded by the years 2015–2090 [historical: 1990–2015]. Time variables: ‘time’, ‘time_bnds’. 3 Scalar state variables (in Output_{SICOPOLIS, ElmerIce}_Scalar.zip) lim – Total ice mass (kg) limnsw – Mass above floatation (kg) iareagr – Grounded ice area (m2) iareafl – Floating ice area (m2) † These variables are provided as yearly snapshots for the years 2016–2090 [historical: 1991– 2015]. Time variable: ‘time’. Scalar flux variables (in Output_{SICOPOLIS, ElmerIce}_Scalar.zip) tendacabf – Total surface mass balance flux (kg a−1) tendlibmassbf – Total basal mass balance flux (kg a−1) tendlibmassbffl – Total basal mass balance flux beneath floating ice (kg a−1) † tendlifmassbf – Total mass loss due to calving and ice front melting (kg a−1) tendligroundf – Total mass flux through the grounding line (kg a−1) † These variables are provided as yearly averages over the intervals bounded by the years 2015–2090 [historical: 1990–2015]. Time variables: ‘time’, ‘time_bnds’. – – – – – – – * Only for the SICOPOLIS results which include a vertical velocity profile and temperature. † Only for the Elmer/Ice results which include floating ice. Scripts related to the ISIMIP-method downscaling, SEMIC code, as well as configuration and input files for SICOPOLIS and Elmer/Ice are available in Repo_ISIMIP_downscale.zip, Repo_SEMIC.zip, Repo_SICOPOLIS.zip and Repo_ElmerIce.zip. See the separate README files in these folders for details.