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Near-Surface Particulate Backscattering Observations with Bio-Optical Lagrangian Drifters.

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Title: Near-Surface Particulate Backscattering Observations with Bio-Optical Lagrangian Drifters.
Authors: BELLACICCO, MARCO1 (AUTHOR) marco.bellacicco@cnr.it, PITARCH, JAIME1 (AUTHOR), ORGANELLI, EMANUELE1 (AUTHOR), ZOFFOLI, MARIA LAURA1 (AUTHOR), CONCHA, JAVIER A.2,3 (AUTHOR), FALCINI, FEDERICO1 (AUTHOR), LI, MENGYU4 (AUTHOR), MARULLO, SALVATORE1 (AUTHOR), RIO, MARIE-HELENE2 (AUTHOR), SANTOLERI, ROSALIA1 (AUTHOR), CENTURIONI, LUCA R.5 (AUTHOR)
Source: Journal of Atmospheric & Oceanic Technology. Nov2024, Vol. 41 Issue 11, p1107-1119. 13p.
Subjects: Optical oceanography, Optical properties, Optical biological sensors, Biogeochemical cycles
Abstract: Particulate matter concentration is an essential ocean variable (EOV) useful for understanding biogeo-chemical processes, improving ocean productivity estimates, and constraining coupled physical and biogeochemical numer-ical models. While direct observations of this parameter are difficult to obtain, the optical backscattering coefficient of marine particles (bbp) can be used as a reliable proxy. However, most in situ multispectral bbp measurements are ship-borne or obtained from moored systems, thus with a limited spatial and temporal coverage. Utilizing Surface Velocity Programme (SVP) drifting buoys with self-contained backscatter sensors designed for extended deployment periods offers a promising solution for collecting data in challenging marine environments. In this study, we presented for the first time the integration of a commercially available, high-frequency, and multispectral optical backscatter sensor into an SVP drifter, the so-called backscatter optical-SVP (BO-SVP) drifter designed to collect bbp measurements near the ocean sur-face. The bbp measurements obtained by the BO-SVP drifter were reliable over a wide range of environmental conditions, showing a good agreement with independent datasets (relative bias , 10%; relative standard deviation , 36%). The BO-SVP drifter captures the satellite sub- and pixel-scale variability by combining the Lagrangian approach and a high-frequency sampling. This configuration enables the acquisition of measurements across numerous pixels in a single day, en-hancing validation activities for ongoing and future satellite products and the quantification of associated uncertainties. The measurements acquired by these platforms can offer valuable insights into particle distribution at fine spatial scales, daily variability, and its relationship with water masses type and ocean dynamics. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Particulate matter concentration is an essential ocean variable (EOV) useful for understanding biogeo-chemical processes, improving ocean productivity estimates, and constraining coupled physical and biogeochemical numer-ical models. While direct observations of this parameter are difficult to obtain, the optical backscattering coefficient of marine particles (bbp) can be used as a reliable proxy. However, most in situ multispectral bbp measurements are ship-borne or obtained from moored systems, thus with a limited spatial and temporal coverage. Utilizing Surface Velocity Programme (SVP) drifting buoys with self-contained backscatter sensors designed for extended deployment periods offers a promising solution for collecting data in challenging marine environments. In this study, we presented for the first time the integration of a commercially available, high-frequency, and multispectral optical backscatter sensor into an SVP drifter, the so-called backscatter optical-SVP (BO-SVP) drifter designed to collect bbp measurements near the ocean sur-face. The bbp measurements obtained by the BO-SVP drifter were reliable over a wide range of environmental conditions, showing a good agreement with independent datasets (relative bias , 10%; relative standard deviation , 36%). The BO-SVP drifter captures the satellite sub- and pixel-scale variability by combining the Lagrangian approach and a high-frequency sampling. This configuration enables the acquisition of measurements across numerous pixels in a single day, en-hancing validation activities for ongoing and future satellite products and the quantification of associated uncertainties. The measurements acquired by these platforms can offer valuable insights into particle distribution at fine spatial scales, daily variability, and its relationship with water masses type and ocean dynamics. [ABSTRACT FROM AUTHOR]
ISSN:07390572
DOI:10.1175/JTECH-D-23-0161.1