Hot Vents Beneath an Icy Ocean: The Aurora Vent Field, Gakkel Ridge, Revealed

• Published in: Oceanography
• Main Authors: Ramirez-Llodra, Eva, Argentino, Claudio, Baker, Maria, Boetius, Antje, Costa, Carolina, Dahle, Håkon, Denny, Emily, Dessandier, Pierre-Antoine, Eilertsen, Mari, Ferre, Benedicte, German, Christopher, Hand, Kevin, Hilário, Ana, Hislop, Lawrence, Jamieson, John, Kalenitchenko, Dimitri, Mall, Achim, Panieri, Giuliana, Purser, Autun, Ramalho, Sofia, Reeves, Eoghan, Rolley, Leighton, Pereira, Samuel, Ribeiro, Pedro, Fatih Sert, Muhammed, Steen, Ida, Stetzler, Marie, Stokke, Runar, Victorero, Lissette, Vulcano, Francesca, Vågenes, Stig, Waghorn, Kate, Buenz, Stefan
• Other Authors: The Arctic University of Norway Tromsø, Norway (UiT), LIttoral ENvironnement et Sociétés - UMR 7266 (LIENSs), Institut national des sciences de l'Univers (INSU - CNRS)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2023
• Subjects: [SDE]Environmental Sciences; [SDU]Sciences of the Universe [physics]; Arctic; Arctic Ocean; Gakkel Ridge
• Online Access: https://hal.science/hal-03876877; https://hal.science/hal-03876877/document; https://hal.science/hal-03876877/file/36-ramirez-llodra.pdf; https://doi.org/10.5670/oceanog.2023.103

International audience Evidence of hydrothermal venting on the ultra-slow spreading Gakkel Ridge in the Central Arctic Ocean has been available since 2001, with first visual evidence of black smokers on the Aurora Vent Field obtained in 2014. But it was not until 2021 that the first ever remotely operated vehicle (ROV) dives to hydrothermal vents under permanent ice cover in the Arctic were conducted, enabling the collection of vent fluids, rocks, microbes, and fauna. In this paper, we present the methods employed for deep-sea ROV operations under drifting ice. We also provide the first description of the Aurora Vent Field, which includes three actively venting black smokers and diffuse flow on the Aurora mound at ~3,888 m depth on the southern part of the Gakkel Ridge (82.5°N). The biological communities are dominated by a new species of cocculinid limpet, two small gastropods, and a melitid amphipod. The ongoing analyses of Aurora Vent Field samples will contribute to positioning the Gakkel Ridge hydrothermal vents in the global biogeographic puzzle of hydrothermal vents.