Knowra Physical oceanography Physical oceanography Physical oceanography studies the ocean’s motion, energy, and interactions with the atmosphere and seafloor, including currents, waves, tides, and heat transport.
Ocean circulation : The large-scale movement of seawater driven by wind, density differences, tides, and other forces. It brings together the currents and overturning flows studied in physical oceanography.
Seawater density : The mass of seawater per unit volume, determined mainly by temperature, salinity, and pressure. Density differences provide a central driver of vertical and large-scale ocean motion.
Ocean forecasting : The prediction of ocean conditions using observations, physical models, and data assimilation. Forecast systems apply ocean dynamics to predict currents, temperature, and sea level.
Chemical oceanography : The study of chemical composition and reactions in seawater and marine environments. It focuses on chemical transformations, while physical oceanography emphasizes motion and energy.
Geostrophic current : A current in which pressure-gradient force is balanced mainly by the Coriolis effect. This balance explains much of the flow away from frictional boundaries.
Equation of state for seawater : A relation connecting seawater’s pressure, temperature, salinity, and density. It quantifies how changes in heat and salt alter the ocean’s buoyancy.
Ocean circulation models : Numerical models that simulate ocean motion and related physical properties. They turn physical laws and observations into estimates of changing ocean states.
Biological oceanography : The study of marine organisms and their interactions with ocean environments. Its central questions concern life, though physical conditions strongly shape biological patterns.
Ekman transport : The net transport of water caused by wind stress and the Coriolis effect in a rotating ocean. Wind-driven surface transport helps explain upwelling and the ocean’s circulation.
Hydrostatic equilibrium : A balance in which vertical pressure gradients support the weight of the fluid above. It underlies the pressure fields used to diagnose ocean circulation.
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