Continental Shelf of Concepción, Chile (100m depth)
Central-South Chilean Coastal Ocean Evaluation System by Claudio Iturra
Where ρ₁₀₀ and ρ₁₀ are densities at 100m and 10m depth respectively. Higher values indicate stronger stratification favorable for HAB development.
Optimal ratio is ~16:1. Deviations indicate nutrient limitation that can favor specific algal species and trigger HAB events.
Composite index combining biological, physical, and chemical factors. Values > 100 indicate high HAB risk.
Where f(N) = N/(Kₙ + N) and f(T) = e^(-((T-Tₒₚₜ)/σ)²). Describes temperature and light-limited growth.
Where τₓ is wind stress, f is Coriolis parameter. Positive values indicate upwelling conditions that bring nutrients to surface.
Potential energy anomaly indicating water column stability. Higher values suggest stratified conditions favorable for HAB retention.