Ocean Optics:
Observing ocean biogeochemistry with optics

Instruments for measuring the optical properties of light and water.

Wetlabs AC-9 Absorption and Attenuation Meter
AC-9 with two flow tubes: one for a one for c.
The Wetlabs AC-9 simultaneously determines the spectral transmittance and spectral absorption of water over nine wavelengths: 412, 440, 488, 510, 532, 555, 650, 676, and 715 nm. The ac-9 employs a 25-cm pathlength for effective measurement of the cleanest natural waters. The unit is also available in a 10-cm pathlength configuration for more turbid environments. Volts to measurement

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Varian Cary 50 Spectrophotometer
Cary 50 Spectrophotometer
TheVarian Cary 50 spectrophotometer makes accurate measurements of light absorption at 80+ wavelengths in the UV and visible part of the spectrum. For more background on UV-Visible spectroscopy, click here. Volts to measurement

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QA/QC

Wetlabs BB2F Combination Chlorophyll Fluorometer and Turbidity Sensor
Wetlabs ECO BB2F.
A combination sensor for concurrent determination of chlorophyll fluorescence and optical backscatterng at two wavelengths. Arranged in a cloverleaf configuration, the sensor measures optical backscattering at 117 degrees at both 470 and 700 nm, and additionally, chlorophyll fluorescence within the same volume. Volts to measurement

Wetlabs ECOVSF Optical Backscattering Sensor
Wetlabs ECOVSF
The angular distribution of scattered radiation of the backward hemisphere is important in the interpretation of remote sensing measurements, investigations of particle shape, and models of visibility in seawater. The ECO-VSF measures the optical scattering at three distinct angles: 100, 125, and 150 degrees, thus providing the shape of the Volume Scattering Function (VSF) throughout the backscattering region. Motivated by the need to better understand the relationship of water-leaving radiance with backscattering into the same direction, the three-angle measurment allows determination of specific angles of backscattering through interpolation and extrapolation from 90 to 180 degrees. The sensor employs three transmitters coupled to a single receiver to obtain its measurements. Volts to measurement

LI-COR Irradiance Sensors    
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LI-COR irradiance sensors measure surace irradiance (Es), downwelling plane irradiance, (Ed) and scalar irradiance (Eo).

 
Satlantic Hyperspectral Tethered Radiometric Buoy.    
The TSRB allows users to obtain upwelling, near-surface, and spectral radiance data. It has a seven-channel upwelling radiance sensor and a single channel downwelling irradiance sensor above the surface.The system provides improved signal performance, ruggedness and sensor stability necessary for field applications
in oceanography and limnology.

 
Sequoia Scientific LISST-100
The LISST-100 instrument is a multi-parameter system for in-situ observations of particle size distribution. It also records the optical transmission, pressure and temperature. Volts to measurement

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Turner Designs 10-AU Fluorometer
Turner Design 10-AU Fluorometer
The 10-AU Fluorometer is a rugged, field-portable fluorometer that can be set up for continuous-flow monitoring or discrete sample analyses Volts to measurement

Steps for processing

QA/QC

Beckman Coulter Multisizer 3 Coulter Counter    
The Multisizer 3 Coulter Counter is a particle size analyzer providing size and volume distributions in number, volume, surface area and mass, with an overall range of 0.4Ám-1200Ám. The Multisizer 3 utilizes The Coulter Principle (Electrical Sensing Zone) to measure particle volume, a direct measurement of a physical property of the particle