Polarstern PS117 expedition Remotely Operated Vehicle (ROV) under-ice observations

• Other Authors: AADC (originator), AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: biota; oceans; IRRADIANCE; EARTH SCIENCE; OCEAN OPTICS; PACK ICE; SEA ICE; UNDER-ICE IRRADIANCE; HERBIVORES; HRR > High Resolution Radiometer; CAMERAS; R/V POLARSTERN; ROV > Remotely Operated Vehicles; ACE/CRC; AMD/AU; AMD; CEOS; GEOGRAPHIC REGION > POLAR; Weddell; Weddell Sea; Sea ice
• Online Access: https://researchdata.ands.org.au/polarstern-ps117-expedition-ice-observations/1431975; https://data.aad.gov.au/metadata/records/AAS_4408_Remotely_Operated_Vehicle_Data; https://data.aad.gov.au/eds/5005/download; https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=AAS_4408; https://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4408_Remotely_Operated_Vehicle_Data

No major problems were encountered during data collection and analysis. During RV Polarstern voyage PS117, under-ice observations were conducted with an instrumented Remotely Operated Vehicle (ROV) deployed directly from the ship. Collected time-stamped datastreams from the instrumented ROV include: ROV navigation data (heading, pitch, roll, position from an acoustic transponder system), under-ice video footage from the ROV camera and additional upward-looking video cameras, data from an upward-looking acoustic altimeter with integrated depth sensor (to measure the distance of the ROV to the sea-ice subsurface), under-ice hyperspectral irradiance and radiance data from two upward-looking radiometers, and time-stamped up-ward looking digital stills images to detect and quantify the abundance of herbivores at the ice-water interface. Methods for data collection are broadly consistent with methods described in detail in the referenced publication. Detailed observations of under-ice habitat characteristics in different sea-ice regimes of the Weddell Sea pack-ice zone through concomitant measurements of an ice algal biomass proxy (hyperspectral optical data) and imagery to determine ice-water interface herbivore abundance.