Forecasting Hypoxia Events in North Atlantic Ecosystems Using Chaotic Dynamics
Bibliographic record
Abstract
This paper introduces a novel approach for modeling dissolved oxygen (DO) time series data collected in Atlantic Canada. The primary objective is to propose a solution that can predict significant fluctuations in dissolved oxygen levels in estuaries, thereby improving our ability to manage and protect these dynamic ecosystems. Dissolved oxygen serves as a crucial indicator of water quality and is influenced by various factors such as temperature, nutrient concentrations, and biological activities, resulting in a nonlinear dynamic system. By analyzing chaos-related metrics, we demonstrate that the inherent unpredictability and sensitivity of DO time series can be effectively captured. We show that the modeling of the magnitude and duration of DO fluctuations can be anticipated by studying features like bifurcation patterns. Our research effectively characterizes dissolved oxygen series as nonlinear dynamic systems, revealing the internal structure of these systems and enabling differentiation of sites based on their hypoxic behavior. We develop models using both classical and deep learning-based early warning/tipping point indicators, which successfully predict the occurrence of hypoxic events even in degraded sites. The presented results highlight the advantages of our proposed method in anticipating tipping points and predicting the duration of anoxic episodes, particularly in highly degraded sites.
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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 | 0.001 |
| 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) | 0.000 | 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".