We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Fate of floating plastic debris released along the coasts in a global ocean model.
AI summary Read the abstract
Using a global ocean circulation model, researchers simulated the fate of plastic debris released from coastlines around the world. They found that plastic accumulates in well-known ocean garbage patches but also washes up on distant shores and sinks to the seafloor. The model highlights that coastal plastic inputs have far-reaching global consequences and that reducing land-based pollution is critical.
Marine plastic pollution is a global issue, from the shores to the open ocean. Understanding the pathway and fate of plastic debris is fundamental to manage and reduce plastic pollution. Here, the fate of floating plastic pollution discharged along the coasts is studied by comparing two sources, one based on river discharges and the other on mismanaged waste from coastal populations, using a Lagrangian numerical analysis in a global ocean circulation model. About 1/3 of the particles end up in the open ocean and 2/3 on beaches. The input scenario largely influences the accumulation of particles toward the main subtropical convergence zones, with the South Pacific and North Atlantic being mostly fed by the coastal population inputs. The input scenario influences the number of beached particles that end up in several coastal areas. Beaching occurs mainly locally, although a significant number of particles travel long distances, allowing for global connectivity.
More Papers Like This
Tracking Marine Litter With a Global Ocean Model: Where Does It Go? Where Does It Come From?
AI summary Read the abstract
Using a global ocean model, researchers simulated the movement of plastic waste released from countries around the world to track where marine litter ends up and where it comes from. The study found that ocean currents create a complex web of connections between distant countries, meaning plastic released in one region can wash up on far-away shores. The results are publicly available through an interactive website and provide a quantitative framework for understanding international responsibility for ocean plastic pollution.
Influence of waves on the three-dimensional distribution of plastic in the ocean
AI summary Read the abstract
Researchers modeled the trajectories of microplastic particles released continuously from coastal sources across realistic ocean simulations to understand how wave dynamics and ocean circulation distribute plastic pollution globally. The model showed that wave-driven mixing significantly influences vertical plastic distribution, not just horizontal surface drift. Including wave effects improves predictions of where ocean microplastics accumulate.
Role of Indian Ocean Dynamics on Accumulation of Buoyant Debris
AI summary Read the abstract
Researchers used ocean circulation modeling to investigate the role of Indian Ocean dynamics in accumulating buoyant marine plastic debris, examining how Ekman convergence and regional current patterns shape the distribution of floating debris in the Indian Ocean subtropical gyre.
River freshwater effects on the ocean surface dynamics and plastic particles spreading in the Southeast Asian Seas: Insights from a high-resolution simulation using GloFAS
AI summary Read the abstract
Researchers simulated ocean currents in Southeast Asian seas using river flow data, then tracked virtual plastic particles released from Indonesian rivers over nine years. About 56% of particles ended up stranded on regional coasts, while about 43% drifted toward the Indian Ocean, showing river flow patterns affect where floating debris travels.
Influence of Near‐Surface Currents on the Global Dispersal of Marine Microplastic
AI summary Read the abstract
An ocean circulation model incorporating biological and physical processes found that near-surface currents, including wind-driven surface drift and wave-induced mixing, play a major role in dispersing buoyant microplastics globally, with plastic accumulating preferentially in subtropical convergence zones. The model improves understanding of how ocean physics shapes global microplastic distribution patterns.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.