Iceberg A74: Seafloor circumnavigation images collected during COSMUS expedition PS124 ...

• Main Authors: Purser, Autun, Boehringer, Lilian, Werner, Ellen, Holtappels, Moritz, Hellmer, Hartmut H, Wenzhöfer, Frank
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: A74 iceberg; calving front; global warming; icebergs; ice covered seafloor community; DATE/TIME; LATITUDE; LONGITUDE; DEPTH, water; Image; Ocean Floor Observation and Bathymetry System; PS124; Polarstern; Antarctic; The Antarctic; Weddell; Weddell Sea; Antarc*; Iceberg*
• Online Access: https://dx.doi.org/10.1594/pangaea.936223; https://doi.pangaea.de/10.1594/PANGAEA.936223

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.During the expedition, the giant iceberg A74 calved off from the Antarctic mainland. In this data set we present images taken from within the water column and the seafloor during part of the iceberg circumnavigation conducted by FS POLARSTERN on the 14th of March, 2021.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 ...