58cc0d87-55a9-4ee9-9d70-759ae7d60dd7 ETT S.p.A. 2026-08-24T15:04:57 ISO 19115:2003/19139 1.0 3 WGS 1984 Water-mass fractions and ideal age from three models of ocean transport 2024-12-13 This dataset comprises three NetCDF files, one for each of three models of global ocean transport: a 1° global configuration of the Nucleus for European Modelling of the Ocean (NEMO), a recent 2° solution of the Ocean Circulation Inverse Model (OCIM), and a 2° solution of the Total Matrix Intercomparison (TMI). Each file provides the steady-state three-dimensional distributions of six dye tracers and the ideal age tracer. The dye tracers represent water-mass fractions, or the fraction of local water volume that was last at the surface in a specific source region. The six source regions are: Antarctic marginal seas (AA), high southern latitudes (HS), mid southern latitudes (MS), low latitudes (LL), northern North Pacific (NP) and northern North Atlantic and Arctic (NA). The ideal age tracer represents the mean time elapsed since the last surface contact of local seawater. To provide steady-state three-dimensional estimates of water-mass fractions and ideal age from three global ocean transport models for the investigation and comparison of global ocean ventilation. Bruno Millet Laboratoire des Sciences du Climat et de l'Environnement (LSCE/IPSL) https://catalog.s4oceanice.eu:/geonetwork/srv/api/records/58cc0d87-55a9-4ee9-9d70-759ae7d60dd7/attachments/cropped-o_ice_logo2-2-1.webp OCEAN ICE ocean ventilation ocean modelling water masses water-mass fractions ideal age dye tracers NEMO OCIM TMI World OCEAN CIRCULATION WATER MASSES Global Change Master Directory (GCMD) Keywords 2026-08-06 geonetwork.thesaurus.external.theme.ardc-curated_gcmd-sciencekeywords_19-4-2024-09-06 World Continents, countries, sea regions of the world. 2015-07-17 geonetwork.thesaurus.external.place.regions Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/deed.en eng oceans -180.00 180.00 -90.00 90.00 The creation of this dataset is endorsed by Ocean-Cryosphere Exchanges in ANtarctica: Impacts on Climate and the Earth System (OCEAN ICE), which is funded by European Union, Horizon Europe Funding Programme for research and innovation under grant agreement Nr. 101060452, 10.3030/101060452. NetCDF https://www.seanoe.org/data/00927/103915/ WWW:LINK-1.0-http--link SEANOE dataset landing page – DOI 10.17882/103915 https://www.seanoe.org/data/00927/103915/data/115837.nc WWW:DOWNLOAD-1.0-http--download Water-mass fractions and ideal age estimated from a NEMO ORCA1 global ocean simulation https://www.seanoe.org/data/00927/103915/data/115838.nc WWW:DOWNLOAD-1.0-http--download Water-mass fractions and ideal age estimated from OCIM2-48L https://www.seanoe.org/data/00927/103915/data/115839.nc WWW:DOWNLOAD-1.0-http--download Water-mass fractions and ideal age estimated from a 2º solution of TMI https://www.seanoe.org/data/00927/103915/data/115842.pdf WWW:DOWNLOAD-1.0-http--download Description of netCDF variables The dataset consists of three processed NetCDF files containing steady-state three-dimensional distributions of six dye tracers and an ideal age tracer generated using three global ocean transport models: a 1° global configuration of NEMO, a 2° solution of OCIM (OCIM2-48L), and a 2° solution of TMI. The six dye tracers represent water-mass fractions associated with six surface source regions: Antarctic marginal seas, high southern latitudes, mid southern latitudes, low latitudes, northern North Pacific, and northern North Atlantic and Arctic. The ideal age tracer represents the mean time elapsed since the last surface contact of local seawater.