Trajectory data in Dörr et al. 2026

This dataset contains trajectory data used in Dörr et al. (2026), submitted to Nature Communications, and code to read in the trajectory data and reproduce Figure 2 of the manuscript. The trajectories were produced with the offline trajectory code TRACMASS (Aldama-Campino et al., 2020), and run with monthly output from the ORCA0083-N06 simulation from 1979 - 2015 for 500 years, thereby looping over the output period. output_19790101_ini.csv and output_19790101_out.csv contain information about each trajectory at seeding, and killing, respectively. The split_19790101_[01-12]_01_run.csv files contain information about each trajectory during runtime. The csv files have the following variables: [Trajectory number],[x-position],[y-position],[z-position],[Volume transport (m^3/s],[Time since seeding (s)],[grid cell wall],[pot. Temperature (˚C)],['practical Salinity (psu)],[pot. Density (kg/m^3)],[Mixed-layer depth (m)], [Mixed-layer depth (turbocline, m)] x,y, and z position are with respect to ORCA0083-N06's native grid (we cut the y-axis from y=2200 until y = 3059 in the original output). The split_19790101_[01-12]_01_run.csv files are zipped using gzip to save starage space. This repository also includes code to reproduce Figure 2 in the manuscript, contained in Dorr_et_al_2026_Fig2.ipynb. The file ORCA0083-N06_latlonz_file.nc contains latitude, longitude and depth information of the model grid necessary to transform the raw trajectory output to 3-dimensional coordinates.