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Differential lidar fluorosensor system used for phytoplankton bloom and seawater quality monitoring in Antarctica

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A mobile fluorosensor system has been built to participate in oceanographic campaigns. During the first mission, carried out within the XIII Italian Antarctic Expedition (Research Vessel Italica, November 1997 to January 1998), seawater quality parameters (phytoplankton concentration, yellow matter, turbidity and biomass productivity) were remotely and locally monitored both in the Ross Sea and along the route back to New Zealand. Data were georeferenced by means of a GPS recorder to be subsequently plotted on thematic maps. The core of the system is a compact lidar fluorosensor capable of single or dual laser excitation of the target. In the single excitation mode, the detection of chromophores peculiar to various water impurities is possible, while dual laser excitation is necessary to monitor the phytoplankton photosynthetic activity on the chlorophyll emission channel. A lamp spectrofluorometer, a pulsed amplitude fluorometer (PAM) and a solar radiance detector completed the set of instruments onboard.

Document Type: Research Article


Affiliations: ENEA

Publication date: January 20, 2001

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