Dynamics of the North Pacific “garbage patch” observed with a suite of Lagrangian instruments for ecological applications
Bibliographic record
Abstract
The FloatEco (Floating Ecosystem) experiment studies physical and biological processes controlling the neopelagic ecosystem emerging in the eastern subtropical North Pacific as a result of marine debris accumulation in the so-called “garbage patch” area. Here, we present preliminary results of the study of pathways of debris into, from, and inside the area based on the analysis of trajectories and derived dynamical characteristics of drifters of various geometry as well as real debris items tagged with GPS trackers by the Ocean Voyages Institute and also numerous volunteers and partners. Response of floating objects to the combined effect of Ekman currents, waves, and direct wind force is summarized and used to improve numerical models. The presence in the central part of the garbage patch of debris with a surprisingly broad range of “windages” is explained by the dominance of unorganized currents and winds, inducing strong horizontal mixing and homogenization. Trapped inside this area, objects with different geometry demonstrate signs of frequent interactions, including direct collisions. Such interactions were confirmed during inspections of the FloatEco instruments and they plays a critical role in propagation of species colonizing debris that, in turn, increases the resilience of the debris-based ecosystem to continuous changes of environmental parameters. We also discuss the Lagrangian connectivity between the pelagic and coastal ecosystems and identify feasible pathways of coastal species into the garbage patch and potential paths of invasion from the garbage patch into the coastal areas. The improved numerical models are used to describe seasonal and interannual changes in the garbage patch location, shape, and capacity, estimate the total amount of fishing nets in the North Pacific, and to develop practical applications for optimization of cleanup operations. Figure. Trajectories of FloatEco Lagrangian instruments and streamlines of operational SCUD model. Also, photographs of drifters, float, GPS-tagged fishing nets, and data of cleanup expeditions used in FloatEco analysis.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".