A Spectrophotometer measures optical attenuation and absorption by characterizing the way seawater absorbs and scatters light. These combined measurements indicate sample turbidity. Optical absorption and attenuation instruments, like the Sea Bird AC-S instrument used by OOI, allow total scattering to be derived for living and detrital particles in the ocean.

Data Products

This instrument measures the following data products. Select a data product's name to learn more.

Data Product Code DPS
Optical Absorption Coefficient OPTABSN DPS
Reference Absorption OPTAREF
Signal Absorption OPTASIG
Optical Beam Attenuation Coefficient OPTATTN DPS
Reference Beam Attenuation OPTCREF
Signal Beam Attenuation OPTCSIG
Temperature from OPTAA OPTTEMP

The algorithm code used to generate data products for this instrument is also available in the ion-functions GitHub repository.

Instrument Models & Deployed Locations

The OOI includes the following instrument makes and models for this instrument type. Follow the links below to find out where in the OOI this instrument has been deployed. You'll also find quick links for each instrument to Data Explorer, where you can plot and access data.

Class-Series Make Model
OPTAAC Sea Bird AC-S Deep