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Underway And Moored Methods For Improving Accuracy In Measurement Of Spectral Particulate Absorption And Attenuation, Wayne H. Slade, Emmanuel Boss, Giorgio Dall'olmo, M. Rois Langner, James Loftin, Michael J. Behrenfeld, Collin Roesler, Toby K. Westberry
Underway And Moored Methods For Improving Accuracy In Measurement Of Spectral Particulate Absorption And Attenuation, Wayne H. Slade, Emmanuel Boss, Giorgio Dall'olmo, M. Rois Langner, James Loftin, Michael J. Behrenfeld, Collin Roesler, Toby K. Westberry
Earth and Oceanographic Science Faculty Work
Optical sensors have distinct advantages when used in ocean observatories, autonomous platforms, and on vessels of opportunity, because of their high-frequency measurements, low power consumption, and the numerous established relationships between optical measurements and biogeochemical variables. However, the issues of biofouling and instrument stability over time remain complicating factors when optical instruments are used over periods longer than several days. Here, a method for obtaining calibration-independent measurements of spectral particle absorption and attenuation is presented. Flow-through optical instrumentation is routinely diverted through a large-surface area 0.2-μm cartridge filter, allowing for the calculation of particle optical properties by differencing temporally adjacent …