GAKKELDEEP: DEPAS ocean-bottom seismometer operations at the Gakkel Ridge in 2018-2019 ...

• Main Authors: Schlindwein, Vera, Kirk, Henning, Hiller, Marc, Scholz, John-Robert, Schmidt-Aursch, Mechita
• Format: Dataset
• Language: English
• Published: GFZ Data Services 2022
• Subjects: In Situ/Laboratory Instruments > Magnetic/Motion Sensors > Seismometers; In Situ Land-based Platforms > GEOPHYSICAL STATIONS/NETWORKS; OBS; DEPAS; Passive seismic; Local network; Temporary; Velocity; Hydrophones; Seismometers; MiniSEED; Arctic; Arctic Ocean; Gakkel Ridge; Sea ice
• Online Access: https://dx.doi.org/10.14470/3s7563492742; https://geofon.gfz-potsdam.de/doi/network/8F/2018

“Gakkel Deep is a pilot project that installed a network of four broadband ocean bottom seismometers (OBS) near Gakkel Deep, the deepest depression in the Arctic Ocean, at the eastern end of the ultraslow spreading Gakkel Ridge. The area is covered year-round by sea ice. In order to enable a safe recovery of the OBS in a sea ice covered ocean, the OBS were modified to include a positioning system that allows to track the instruments at meter accuracy during descent and ascent and when stuck beneath ice floes. This pilot studied aimed at testing the recovery procedure of the OBS, checking the performance of the modified instrument design, getting an overview of ambient seismic noise at the bottom of the Arctic Ocean and at contributing to a better understanding of the origin of the Gakkel Deep depression with more than 3000 m of topography. The network is shaped as a rectangle with 8 km and 10 km side length and is centered at about 82°N 119.5°E at water depths between 3600 m and 4100 m. It is positioned ...