| Summary: | These datasets contain the 21st century atmospheric and oceanic forcing datasets used for Greenland and Antarctic standalone ice sheet model simulations as part of the Ice Sheet Model Intercomparison Project for CMIP6 (ISMIP6). ISMIP6 is a targeted activity of the Climate and Cryosphere (CliC) project of the World Climate Research Project (WCRP) and has been formally endorsed by the Coupled Model Intercomparison Project Phase 6 (CMIP6; Eyring et al., 2016). The datasets were prepared using CMIP5 and CMIP6 models listed in the table below (see also Table 1, Nowicki et al. 2020).The CMIP5 models were selected independently for the Greenland and Antarctic ice sheets (Barthel et al., 2020), using atmospheric and oceanic metrics appropriate for each ice sheet.As CMIP6 models started to become available in late spring–summer 2019, ISMIP6 selected four CMIP6 models based solely on their availability. The ISMIP6 forcing datasets are presented in Nowicki et al. (2020).For more information on how the oceanic dataset were prepared,please see Slater et al. (2019; 2020)forGreenland and Jourdain et al. (2020) forAntarctica. Downloading Data The data can be downloaded from the Globus GHub-ISMIP6-Forcing endpoint. Please log in andclick on the Download tab to receive the Download instructions. Acknowledgements The experimental protocol and datasets for the ISMIP6-Projections-Antarctica and ISMIP6-Projections-Greenlandstandalone ice sheet simulations would not have been possible without the effort of many scientists that have given their time and expertise, and have run models to convert the CMIP5 and CMIP6 models output into datasets that standalone ice sheet models can use. ISMIP6 would like to thank the ocean focus group under the leadership of Fiamma Straneo, the atmospheric focus group under the leadership of Bill Lipscomb and Robin Smith, and the CMIP5 model evaluation focus group under the leadership of Alice Barthel. Xylar Asay-Davis, Nicolas Jourdain, Tore Hattermann, Chris Little, Helene Seroussi have been instrumental ...
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