Detecting mesopelagic organisms using biogeochemical‐Argo floats

Haëntjens, Nils; Della Penna, Alice; Briggs, Nathan ORCID: https://orcid.org/0000-0003-1549-1386; Karp‐Boss, Lee; Gaube, Peter; Claustre, Hervé; Boss, Emmanuel. 2020 Detecting mesopelagic organisms using biogeochemical‐Argo floats. Geophysical Research Letters, 47 (6), e2019GL086088. https://doi.org/10.1029/2019GL086088

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Abstract/Summary

During the North Atlantic Aerosols and Ecosystems Study (NAAMES) in the western North Atlantic (NAAMES), float‐based profiles of fluorescent dissolved organic matter (FDOM) and backscattering exhibited distinct spike layers at ~300 m. The locations of the spikes were at depths similar or shallower to where a ship‐based scientific echo sounder identified layers of acoustic backscatter, an Underwater Vision Profiler (UVP) detected elevated concentration of zooplankton, and mesopelagic fish were sampled by a mesopelagic net tow. The collocation of spike layers in bio‐optical properties with mesopelagic organisms suggests that some can be detected with float‐based bio‐optical sensors. This opens the door to the investigation of such aggregations/layers in observations collected by the global biogeochemical‐Argo array allowing the detection of mesopelagic organisms in remote locations of the open ocean under‐sampled by traditional methods.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1029/2019GL086088
ISSN:	0094-8276
Date made live:	03 Mar 2020 13:26 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/527098

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