Ocean Floor Observation and Bathymetry System (OFOBS) seafloor images of the Weddell Sea, Antarctica collected during the PS124 Polarstern expedition

During the RV POLARSTERN expedition PS124 to the Weddell Sea during Jan - April 2021 the Ocean Floor Observation and Bathymetry System (OFOBS) was used to collect still and video images, as well as sidescan data, from various locations surveyed during the research cruise. In this data set ~11,700 seafloor Images from 16 deployments made across the Filchner Shelf, Filchner Sill and Weddell Sea seafloor are presented. The OFOBS system consisted of a towed underwater camera system equipped with both a high-resolution photo-camera (iSiTEC, CANON EOS 5D Mark III) and a high-definition video-camera (iSiTEC, Sony FCB-H11) as well as an integrated sidescan sonar system. The cameras were mounted on a steel frame (140L x 92W x 135H cm), together with two strobe lights (iSiTEC UW-Blitz 250, TTL driven), three laser pointers spaced with a distance of 50 cm used to estimate the size of seafloor structures, four LED lights, and a USBL positioning system (Posidonia) to track the position of the OFOBS during deployments, with additional positioning information provided by the integrated INS and DVL systems. In automatic mode, a seabed photo, depicting an area of approximately 4-10 m**2, with variations depending on the actual height above ground, was taken every ~15 seconds to obtain series of TIMER stills distributed at regular distances along each of the survey profiles. Profile lengths varied in length depending on duration of the cast. At a ship speed of 0.5 kn, the average distance between seabed images was approximately 5 m, with this spacing being 15 m at 1.5 kt speed. Additional HOTKEY photos were taken from interesting objects (organisms, seabed features, etc) when they appeared in the live video feed. One minute POSIDONIA position fixes were used in this current data set, so there is some offset of a few 10s of meters for some of the collected images.

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Cite this as

Purser, Autun, Hehemann, Laura, Boehringer, Lilian, Werner, Ellen, Wenzhöfer, Frank (2021). Dataset: Ocean Floor Observation and Bathymetry System (OFOBS) seafloor images of the Weddell Sea, Antarctica collected during the PS124 Polarstern expedition. https://doi.org/10.1594/PANGAEA.936205

DOI retrieved: 2021

Additional Info

Field Value
Imported on November 29, 2024
Last update November 29, 2024
License CC-BY-4.0
Source https://doi.org/10.1594/PANGAEA.936205
Author Purser, Autun
Given Name Autun
Family Name Purser
More Authors
Hehemann, Laura
Boehringer, Lilian
Werner, Ellen
Wenzhöfer, Frank
Source Creation 2021
Publication Year 2021
Resource Type application/zip - filename: Purser-etal_2021b
Subject Areas
Name: Biosphere

Related Identifiers
Title: A vast icefish breeding colony discovered in the Antarctic
Identifier: https://doi.org/10.1016/j.cub.2021.12.022
Type: DOI
Relation: References
Year: 2022
Source: Current Biology
Authors: Purser Autun , Hehemann Laura , Boehringer Lilian , Tippenhauer Sandra , Wege Mia , Bornemann Horst , Pineda-Metz Santiago E A , Flintrop Clara , Koch Florian , Hellmer Hartmut H , Burkhardt-Holm Patricia , Janout Markus A , Werner Ellen , Glemser Barbara , Balaguer Jenna , Rogge Andreas , Holtappels Moritz , Wenzhöfer Frank , Hellmer Hartmut H , Holtappels Moritz .

Title: The Expedition PS124 of the Research Vessel POLARSTERN to the southern Weddell Sea in 2021
Identifier: https://doi.org/10.48433/BzPM_0755_2021
Type: DOI
Relation: References
Year: 2021
Source: Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research
Authors: Purser Autun , Hehemann Laura , Boehringer Lilian , Tippenhauer Sandra , Wege Mia , Bornemann Horst , Pineda-Metz Santiago E A , Flintrop Clara , Koch Florian , Hellmer Hartmut H , Burkhardt-Holm Patricia , Janout Markus A , Werner Ellen , Glemser Barbara , Balaguer Jenna , Rogge Andreas , Holtappels Moritz , Wenzhöfer Frank , Hellmer Hartmut H , Holtappels Moritz .