Southern Ocean Lagrangian Trajectories Simulated from 1986 to 2005

Lagrangian trajectory data simulated for 2000 model years using the TRACMASS v7.0.0 code and EC-Earth/NEMO model output. The dataset contains initial, end, and full trajectory positions for particles released in the Drake Passage, run both forward and backward in time from 1986 to 2005. Sara Berglund from Stockholm University created this dataset, which loops the 20-year monthly mean ocean state to extend simulations.

Use Cases

• Analyze Southern Ocean particle pathways and connectivity based on simulated Lagrangian trajectories.
• Validate ocean general circulation model output against Lagrangian transport theories using the provided trajectory endpoints.
• Study the long-term fate of water masses using the 2000-year simulated trajectory loops.
• Compare forward and backward trajectory simulations to understand source and sink regions in the Drake Passage.

Strengths

• Trajectories cover a long simulated period of 2000 years, leveraging a 20-year (1986-2005) looped climate model state.
• Data includes both forward and backward simulations from a key Southern Ocean region (Drake Passage), allowing for bi-directional flow analysis.
• Output is structured into initial, end, and full run files, providing flexibility for different analysis depths.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for large-scale ML tasks.
• The data represents a model simulation (EC-Earth/NEMO) at 1-degree resolution, not direct observations, and may contain model biases.

Provenance

Source

Stockholm University

Collection Method

Simulated using the Lagrangian trajectory code TRACMASS v7.0.0 driven by EC-Earth/NEMO model output under CMIP5 guidelines.

Time Range

1986 to 2005 (model input data), with trajectories simulated for 2000 model years.

Freshness

Last update date is unknown; freshness unverified.

Geography

Southern Ocean, with trajectories initiated in the Drake Passage.