Absorption of light is a process in which light energy is converted into other forms of energy such as photosynthesis, fluorescence, or heat. Absorbing agents in natural waters are water itself (see absorption by pure water), particulates and dissolved materials such as colored dissolved organic material (CDOM) (see absorption by particulates and CDOM). Each of these components has a specific absorption spectrum. Particles have various pigments, each of which has its own absorption spectrum. By studying the spectral absorption coefficient measured in natural waters such as oceans, lakes, and estuaries, it is then possible to learn much about the nature of the particles and dissolved materials that are contained within it.
Sensors
Absorption spectrum: ac-9 or ac-s underwater spectrophotometer
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Intro to IOPs
More on IOPs: absorption • beam attenuation • volume scattering function • fluorescence • turbidity • scattering
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