Inferring and removing a spurious response in the optical backscattering signal from an autonomous profiling float
MetadataShow full item record
Development of autonomous profiling floats, allowing for long-term continuous measurement of bio-optical variables, promises to significantly increase our knowledge of the variability of the particulate optical backscattering coefficient bbp in marine environments. However, because autonomous floats are designed for unattended data collection and only rarely are recovered for analysis of the condition of the sensors in situ, the quality-control analysis of float data streams is of paramount importance in both a particular dataset and the larger understanding of the response of sensors over the lifetime of the floats. Anomalous data from a backscattering sensor (MCOMS) mounted on autonomous profiling floats are reported here. The observed sensor behavior, which presents itself as significant differences in the values observed at the parking depth between profiles, caused by a steady increase in the signal during the profiling time, is neither common to all sensors nor can it be a function of changes in the particle population. A simple quality-control procedure that is able to detect this spurious sensor response is proposed. Further characterization of this effect will require laboratory experimentation under controlled conditions of temperature and pressure.
Showing items related by title, author, creator and subject.
Leymarie, E.; Penkerc'h, C.; Vellucci, V.; Lerebourg, C.; Antoine, David; Boss, E.; Lewis, M.; D'Ortenzio, F.; Claustre, H. (2018)An efficient system to produce in situ high quality radiometric measurements is compulsory to rigorously perform the vicarious calibration of satellite sensors dedicated to Ocean Color Radiometry (OCR) and to validate ...
Use of bio-optical profiling float data in validation of ocean colour satellite products in a remote ocean regionWojtasiewicz, B.; Hardman-Mountford, N.; Antoine, David; Dufois, F.; Slawinski, D.; Trull, T. (2018)Utility of data from autonomous profiling floats for the validation of satellite ocean colour products from current satellite ocean colour sensors was assessed using radiometric and chlorophyll a fluorescence data from ...
Combined processing and mutual interpretation of radiometry and fluorimetry from autonomous profiling Bio-Argo floats: Chlorophyll a retrievalXing, X.; Morel, A.; Claustre, H.; Antoine, David; D’Ortenzio, F.; Poteau, A.; Mignot, A. (2011)Eight autonomous profiling floats equipped with miniaturized radiometers and fluorimeters have collected data in Pacific, Atlantic, and Mediterranean offshore zones. They measured in particular 0–400 m vertical profiles ...