Class Oceanography

java.lang.Object

org.episteme.natural.earth.oceanography.Oceanography

public class Oceanography
extends Object

Oceanography calculations.

Since:

1.0

Author:

Silvere Martin-Michiellot, Gemini AI (Google DeepMind)

Field Summary

Fields

Modifier and Type	Field	Description
static final Real	OMEGA_M2	M2 tidal constituent frequency (rad/s).
static final Real	OMEGA_S2	S2 tidal constituent frequency.
static final Real	RHO_SEAWATER	Standard density of seawater (kg/m³)

Constructor Summary

Constructors

Constructor	Description
Oceanography()

Method Summary

Modifier and Type	Method	Description
static Real	bruntVaisalaFrequency(Real densityGradient, Real meanDensity)	Brunt-Väisälä (buoyancy) frequency.
static Real	deepWaterWaveSpeed(Real wavelength)	Deep water wave speed. c = √(gL / 2π) = gT / 2π
static Real	deepWaterWaveSpeedFromPeriod(Real period)	Deep water wave speed from period.
static Real	ekmanTransport(Real windStress, Real latitude)	Ekman transport.
static Real	mixedLayerDepth(Real windStress, Real time, Real density)	Mixed layer depth estimate from wind stress. h_ml ≈(2 * τ * t / ρ)^(1/2) (simplified Kraus-Turner)
static Real	seawaterDensity(Real temperature, Real salinity)	Density of seawater from temperature and salinity (UNESCO 1983).
static Real	shallowWaterWaveSpeed(Real depth)	Shallow water wave speed. c = √(gh)
static Real	significantWaveHeight(Real windSpeed)	Significant wave height from wind (simplified).
static Real	soundSpeedSeawater(Real temperature, Real salinity, Real depth)	Speed of sound in seawater (Mackenzie equation).
static Real	tidalHeight(Real time, Vector<Real> amplitudes, Vector<Real> frequencies, Vector<Real> phases)	Tidal constituent prediction.
static Real	waveNumber(Real period, Real depth)	General dispersion relation (solved iteratively).

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

RHO_SEAWATER

public static final Real RHO_SEAWATER

Standard density of seawater (kg/m³)

OMEGA_M2

public static final Real OMEGA_M2

M2 tidal constituent frequency (rad/s). Period ≈12.42 hours

OMEGA_S2

public static final Real OMEGA_S2

S2 tidal constituent frequency. Period = 12.00 hours

Constructor Details

Oceanography

public Oceanography()

Method Details

deepWaterWaveSpeed

public static Real deepWaterWaveSpeed(Real wavelength)

Deep water wave speed. c = √(gL / 2π) = gT / 2π

deepWaterWaveSpeedFromPeriod

public static Real deepWaterWaveSpeedFromPeriod(Real period)

Deep water wave speed from period.

shallowWaterWaveSpeed

public static Real shallowWaterWaveSpeed(Real depth)

Shallow water wave speed. c = √(gh)

waveNumber

public static Real waveNumber(Real period,
 Real depth)

General dispersion relation (solved iteratively). ω² = gk * tanh(kh)

significantWaveHeight

public static Real significantWaveHeight(Real windSpeed)

Significant wave height from wind (simplified). H_s ≈0.0246 * U² (Fully developed sea)

tidalHeight

public static Real tidalHeight(Real time,
 Vector<Real> amplitudes,
 Vector<Real> frequencies,
 Vector<Real> phases)

Tidal constituent prediction. η(t) = Σ A_i * cos(ω_i * t - φ_i)

seawaterDensity

public static Real seawaterDensity(Real temperature,
 Real salinity)

Density of seawater from temperature and salinity (UNESCO 1983).

soundSpeedSeawater

public static Real soundSpeedSeawater(Real temperature,
 Real salinity,
 Real depth)

Speed of sound in seawater (Mackenzie equation).

mixedLayerDepth

public static Real mixedLayerDepth(Real windStress,
 Real time,
 Real density)

Mixed layer depth estimate from wind stress. h_ml ≈(2 * τ * t / ρ)^(1/2) (simplified Kraus-Turner)

ekmanTransport

public static Real ekmanTransport(Real windStress,
 Real latitude)

Ekman transport. M_E = τ / (ρ * f) where f = 2Ω sin(φ)

bruntVaisalaFrequency

public static Real bruntVaisalaFrequency(Real densityGradient,
 Real meanDensity)

Brunt-Väisälä (buoyancy) frequency. N² = -(g/ρ) * dρ/dz