We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
A year-long field study of buried plastics reveals underestimation of plastic pollution on Hawaiian beaches
AI summary Read the abstract
Quarterly surveys of Hawaiian beaches found that 91% of recovered plastic particles were buried below the sand surface (deeper than 2 cm), revealing a substantial hidden reservoir of plastic pollution not captured by standard surface surveys. Most buried particles were small fragments averaging 6.7 mm, with abundance varying across depths, beaches, and sampling periods.
Global models estimate that two-thirds of floating ocean plastic has accumulated in coastal areas since the 1950s, with Hawai'i's windward shores particularly vulnerable due to their proximity to the North Pacific Garbage Patch. Our quarterly surveys revealed that 91 % of recovered plastic particles were buried below the surface (deeper than 2 cm), with most particles being small fragments (93 %) with an average mean max length of 6.7 ± 4.4 mm. This study offers new insights into subsurface plastic, exposing a previously hidden vertical distribution of plastic pollution. We observed significant variations in plastic abundance across depths, beaches, and sampling periods, along with a positive correlation between particle size and sand grain size. Additionally, through reconciliation science, we critically reflect on the cultural impacts of our research, emphasizing the importance of aligning plastic pollution studies with local community values and environmental stewardship.
More Papers Like This
Buried Plastic Pollution and Fragmentation Dynamics in Coastal Zones: Insights from Hawaiian Beaches
AI summary Read the abstract
Researchers surveyed buried plastic pollution down to 1 meter depth on Hawaiian beaches, which receive disproportionate plastic input due to proximity to the North Pacific Garbage Patch, characterizing the abundance and fragmentation dynamics of subsurface plastic particles to better understand long-term plastic accumulation and degradation in beach environments.
Three-dimensional evaluation of beaches of oceanic islands as reservoirs of plastic particles in the open ocean.
AI summary Read the abstract
This study investigated the three-dimensional distribution of plastic in beach sediment on three oceanic islands by sampling deeper than surface layers, finding that focusing only on the surface significantly underestimates total plastic standing stocks. The findings suggest that current estimates of beach plastic pollution are conservative and that plastics are being buried in the substrate over time.
Three-dimensional distribution of plastic pellets in sandy beaches: shifting paradigms
AI summary Read the abstract
Researchers dug up to 2 meters deep in sandy beaches near a river mouth in Spain and found plastic pellets at all depths, with surface layers holding less than 10% of the total subsurface abundance. The finding reveals that surface sampling dramatically underestimates beach plastic contamination and that pellets accumulate at depth through hydrodynamic burial processes.
Toward Balancing the Budget: Surface Macro-Plastics Dominate the Mass of Particulate Pollution Stranded on Beaches
AI summary Read the abstract
Researchers found that surface macroplastics dominate beach plastic pollution by mass on a remote South African beach, even though microfibres accounted for 99.7% of items by count. The study revealed that buried litter represents 86% of macroplastic items but only 5% of macroplastic mass, and ongoing degradation of existing plastic will increase fragment counts even without new plastic inputs.
Characterization of microplastic and mesoplastic debris in sediments from Kamilo Beach and Kahuku Beach, Hawai'i
AI summary Read the abstract
Researchers characterized nearly 49,000 large microplastic and mesoplastic particles (0.5–8 mm) hand-picked from two Hawaiian beaches, finding white/transparent fragments were most abundant (72%) and that polyethylene and polypropylene dominated polymer types as confirmed by Raman spectroscopy.
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.