physics

Bathymetry
Bottom character
Currents
Heat flux
Ice distribution
Salinity
Sea level
Surface waves
Stream flow
Temperature
Wind speed and direction

biogeochemistry

Acidity
Colored dissolved organic matter
Contaminants
Dissolved nutrients
Dissolved oxygen
Ocean color
Optical properties
Pathogens
Partial pressures of CO2
Total suspended matter

biology and ecosystems

Biological vital rates
Coral species and abundance
Fish species and abundance
Invertebrate species and abundance
Marine mammal species and abundance
Microbial species, abundance, and activity
Nekton diet
Phytoplankton species and abundance
Sea birds species and abundance
Sea turtles species and abundance
Submerged aquatic vegetation species and abundance
Sound
Zooplankton species and abundance

Core IOOS Variables