Trajectory files for 'Floating debris and organisms can raft to Antarctic coasts from all major Southern Hemisphere landmasses'

Summary:

This dataset contains trajectory files from Southern Hemisphere particle releases conducted with Ocean Parcels (Delandmeter & van Sebille, 2019; https://oceanparcels.org) and run offline using daily surface velocities from ACCESS-OM2-01 (Kiss et al. 2020; https://dx.doi.org/10.25914/608097cb3433f), combined with Stokes drift velocities from Wave Watch III (Rascle and Ardhuin, 2013; ftp.ifremer.fr/ifremer/ww3/HINDCAST/GLOBAL/). 

Particle were released daily from 10 Southern Hemisphere islands and continents (South America, South Africa, Australia, New Zealand, Macquarie Island, Marion Island, Crozet Islands, Kerguelen Islands, South Georgia Island, Gough Island) for 19 years starting on 1 January 1997 and ending on 31 December 2015, with each particle tracked forward-in-time for three years.  Particle trajectories are organised in directories by release location, with each file corresponding to a single release year.

Each netcdf file contains particle trajectory positions (latitude and longitude) saved at a 5-day temporal resolution, along with a variable (shelf_col_3gc) that defines when a particle has reached the Antarctic coastline. Due to size restrictions, only particle trajectories that reached within three model grid cells of the Antarctic coastline (shelf_col_3gc = 1) are provided here. The code used to run these particle tracking experiments is available on Github at https://github.com/hrsdawson/GCB_Antarctic_Rafting.

The scripts used to run the particle tracking experiments, analyse the output, and create the figures in the manuscript (cited below) are also available in the 'scripts.zip' folder.

Citation of associated paper:  Dawson, H. R. S., England, M. H., Morrison, A. K., Tamsitt, V., and Fraser, C. I. (2024). Floating debris and organisms can raft to Antarctic coasts from all major Southern Hemisphere landmasses, Global Change Biology. 

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