Drifter-Derived Pathways and Travel Time Estimates

An online interactive tool for estimating the most likely path between any 2 locations in the ocean, together with an associated travel time of this path. The results are based only on positional observations from the 6-hourly Global Drifter Program product. The method works in a two-step fashion: first by finding a most likely path provided as a sequence of hexagonal shapes in space; and then by estimating how long it would take to travel along this pathway. The hexagonal tessellation is used as this results in more natural meandering pathways than if rectangular boxes are used. More details on the method can be found in O'Malley et al. (2021).

Sample Input Instructions and Output Results

**The interative tool can be found here: Link to Streamlit for interactive tool.**

If desired a more flexible Python implementation can be found at this Github page, where further instructions are given on how the code can be used to obtain uncertainty estimates, or applied to other input data (such as simulated trajectories).