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| Format: | Recurso digital |
| Language: | English |
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2026
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| Online Access: | https://doi.org/10.5281/zenodo.19259725 |
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| _version_ | 1866901942816473088 |
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| author | Tajouri, Soumaïa |
| author_facet | Tajouri, Soumaïa |
| contents | <p>This repository contains data sets supporting the study titled <em>Lagrangian perspective on the drivers of future AMOC decline: reduced upper limb water availability and weaker diapycnal transformation efficiency. T</em>he study is based on Lagrangian trajectories evaluated using monthly mean velocity and tracer fileds output from the HadGEM3-GC3.1-HM climate model <em>hist-1950</em> and <em>highres-future </em>runs<em>.</em></p> <p>Numerical water parcels are initialised to sample the full-depth southward transport across the 49N latitude section in the Atlantic Ocean every month in 1972 and 1972. Water parcels are advected backwards-in-time using TRACMASS v7.1 Lagrangian particle tracking tool within the subpolar North Atlantic until any one of following termination conditions are met: water parcels reach the Hudson Strait, the Davis Strait, the Fram Strait, or the Barents Sea; water parcels return to the 49N section; water parcels reach the ocean surface; or water parcel reach the maximum advection time of 20-years.</p> <p>The number of water parcels initialised in each model-grid cell scales with the total southward transport through that cell, such that the maximum possible transport conveyed by any single particle is 5 mSv (mSv == 10-3 Sv), resulting in more arount 510 000 water parcel trajectories.</p> <p>Water parcel locations (converted to geographical coordinates) and properties (conservative temperature, absolute salinity, potential density [TEOS-10]) are output on every model-grid cell crossing. TRACMASS determines particle properties on grid-cell crossings by taking the average of the properties stored at the nearest two T-grid points.</p> <p>Here we provide:</p> <ul> <li> TRACMASS_MresMIP.zip: the TRACMASS Lagragian particle tracking tool which was used to perform our two experiments in 1972 (a2 namelist) and 2050 (a1 namelist).</li> <li>2050_experiment_data.tar.gz:The original trajectories data of the 2050 experiment in both csv and parquet format as well as the processed data used in the study.</li> <li>1972_expt_data.tar.gz: same as 2050_experiment_data.tar.gz but for the 1972 experiment.</li> </ul> <p>All Lagrangian experiments were completed and analysed using the JASMIN High-Performance Computing facility (<a href="https://jasmin.ac.uk">https://jasmin.ac.uk</a>).</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_19259725 |
| institution | Zenodo |
| language | eng |
| publishDate | 2026 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Lagrangian perspective on the drivers of future AMOC decline: reduced upper limb water availability and weaker diapycnal transformation efficiency Tajouri, Soumaïa AMOC Lagrangian analysis dense water formation subpolar North Atlantic <p>This repository contains data sets supporting the study titled <em>Lagrangian perspective on the drivers of future AMOC decline: reduced upper limb water availability and weaker diapycnal transformation efficiency. T</em>he study is based on Lagrangian trajectories evaluated using monthly mean velocity and tracer fileds output from the HadGEM3-GC3.1-HM climate model <em>hist-1950</em> and <em>highres-future </em>runs<em>.</em></p> <p>Numerical water parcels are initialised to sample the full-depth southward transport across the 49N latitude section in the Atlantic Ocean every month in 1972 and 1972. Water parcels are advected backwards-in-time using TRACMASS v7.1 Lagrangian particle tracking tool within the subpolar North Atlantic until any one of following termination conditions are met: water parcels reach the Hudson Strait, the Davis Strait, the Fram Strait, or the Barents Sea; water parcels return to the 49N section; water parcels reach the ocean surface; or water parcel reach the maximum advection time of 20-years.</p> <p>The number of water parcels initialised in each model-grid cell scales with the total southward transport through that cell, such that the maximum possible transport conveyed by any single particle is 5 mSv (mSv == 10-3 Sv), resulting in more arount 510 000 water parcel trajectories.</p> <p>Water parcel locations (converted to geographical coordinates) and properties (conservative temperature, absolute salinity, potential density [TEOS-10]) are output on every model-grid cell crossing. TRACMASS determines particle properties on grid-cell crossings by taking the average of the properties stored at the nearest two T-grid points.</p> <p>Here we provide:</p> <ul> <li> TRACMASS_MresMIP.zip: the TRACMASS Lagragian particle tracking tool which was used to perform our two experiments in 1972 (a2 namelist) and 2050 (a1 namelist).</li> <li>2050_experiment_data.tar.gz:The original trajectories data of the 2050 experiment in both csv and parquet format as well as the processed data used in the study.</li> <li>1972_expt_data.tar.gz: same as 2050_experiment_data.tar.gz but for the 1972 experiment.</li> </ul> <p>All Lagrangian experiments were completed and analysed using the JASMIN High-Performance Computing facility (<a href="https://jasmin.ac.uk">https://jasmin.ac.uk</a>).</p> |
| title | Lagrangian perspective on the drivers of future AMOC decline: reduced upper limb water availability and weaker diapycnal transformation efficiency |
| topic | AMOC Lagrangian analysis dense water formation subpolar North Atlantic |
| url | https://doi.org/10.5281/zenodo.19259725 |