Seabed video and still images from the northern Weddell Sea and the western flanks of the Powell Basin.

Purser, A.; Dreutter, S.; Griffiths, H. ORCID: https://orcid.org/0000-0003-1764-223X; Hehemann, L.; Jerosch, K.; Nordhausen, A.; Piepenburg, D.; Richter, C.; Schroder, H.; Dorschel, B.. 2021 Seabed video and still images from the northern Weddell Sea and the western flanks of the Powell Basin. Earth System Science Data, 13 (2). 609-615. 10.5194/essd-13-609-2021

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Official URL: https://essd.copernicus.org/articles/13/609/2021/

Abstract/Summary

Research vessels equipped with fibre optic and copper-cored coaxial cables support the live onboard inspection of high-bandwidth marine data in real time. This allows for towed still-image and video sleds to be equipped with latest-generation higher-resolution digital camera systems and additional sensors. During RV Polarstern expedition PS118 in February-April 2019, the recently developed Ocean Floor Observation and Bathymetry System (OFOBS) of the Alfred Wegener Institute was used to collect still-image and video data from the seafloor at a total of 11 predominantly ice-covered locations in the northern Weddell Sea and Powell Basin. Still images of 26-megapixel resolution and HD (high-definition) quality video data were recorded throughout each deployment. In addition to downward-facing video and still-image cameras, the OFOBS also mounted side-scanning and forward-facing acoustic systems, which facilitated safe deployment in areas of high topographic complexity, such as above the steep flanks of the Powell Basin and the rapidly shallowing, iceberg-scoured Nachtigaller Shoal. To localise collected data, the OFOBS system was equipped with a Posidonia transponder for ultra-short baseline triangulation of OFOBS positions.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.5194/essd-13-609-2021
ISSN:	1866-3508
Date made live:	24 Mar 2021 08:51 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/529940

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.5194/essd-13-609-2021

ISSN:

1866-3508

Date made live:

24 Mar 2021 08:51 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/529940