Arctic Ocean freshwater storage and fluxes from CMIP6 model ensembles 1950-2100

• Main Authors: Hannah Zanowski, Alexandra Jahn
• Format: Dataset
• Language: unknown
• Published: Arctic Data Center 2021
• Subjects: Arctic Ocean; CMIP6; freshwater; modeling; Arctic; Barents Sea; Laplace; Nares; National Science Foundation Office of Polar Programs; Sea ice
• Online Access: https://search.dataone.org/view/urn:uuid:711b9f4c-6894-4a1c-937b-fc95fc782dd9

This dataset includes timeseries of monthly Arctic freshwater storage and fluxes calculated for the ensemble members of seven climate models participating in the Coupled Model Intercomparison Project phase 6 (CMIP6): CanESM5 (Canadian Earth System Model version 5), CESM2 (Community Earth System Model version 2), CNRM-CM6-1 (Centre National de Recherches Météorologiques Climate Model version 6.1), IPSL-CM6A-LR (Institut Pierre‐Simon Laplace Climate Model version 6), MIROC6 (Model for Interdisciplinary Research on Climate version 6), MPI-ESM1-2-LR (Max Planck Institute Earth System Model version 1.2), and UKESM1-0-LL (U.K. Earth System Model version 1). All freshwater terms are computed relative to a reference salinity of 34.8. The files cover three CMIP6 experiments--the historical (1950-2015), and two ScenarioMIP future forcing scenarios, SSP1-2.6 and SSP5-8.5 (both spanning 2015-2100). Also included is a decomposition of the liquid freshwater fluxes into their time-varying salinity and volume contributions in all Arctic gateways (Bering, Nares, Barrow, Fram, and Davis straits and the Barents Sea Opening) spanning 2000-2100 for both SSP1-2.6 and SSP5-8.5. In both cases, the first 15 years of the output (2000-2015) is from the historical experiment and the remaining years (2015-2100) from the respective future forcing scenario. For some models, the future forcing scenarios have fewer ensemble members than the historical experiment, so for the liquid flux decomposition only the historical ensemble members with future scenario counterparts are included. The data is stored in netcdf format with metadata included in each file. Data were produced for the publication Zanowski et al. 2021 (citation below). This work was funded by the National Science Foundation Office of Polar Programs under award NSF-OPP 1504348. The original model output that the timeseries are derived from is publicly available from the Earth System Grid Federation at https://esgf-node.llnl.gov/search/cmip6/. Zanowski, H., A. Jahn, and M.M. Holland, 2021: Arctic Ocean freshwater storage and fluxes in CMIP6 ensembles: Declining sea ice, increasing ocean storage and export. JGR Oceans, doi: 10.1029/2020JC016930