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The International Bathymetric Chart of the Arctic Ocean Version 5.0

2024; Nature Portfolio; Volume: 11; Issue: 1 Linguagem: Inglês

10.1038/s41597-024-04278-w

2052-4463

Martin Jakobsson, Rezwan Mohammad, Magnus Karlsson, Silvia Salas‐Romero, Florian Vacek, Florian Heinze, Caroline Bringensparr, Carlos F. Castro, Paul Johnson, J.W. Kinney, Sara Cardigos, Michael Bogonko, Daniela Accettella, David Amblàs, Lu An, Aileen Bohan, Angelika Brandt, Stefan Bünz, Miquel Canals, J. L. Casamor, Bernard Coakley, N. Cornish, Seth L. Danielson, Maurizio Demarte, Davide Di Franco, Mary‐Lynn Dickson, Boris Dorschel, Julian A. Dowdeswell, Simon Dreutter, Alice Frémand, John K. Hall, Bryan Hally, David M. Holland, Jong Kuk Hong, Roberta Ivaldi, Paul Cornils Knutz, Diana Krawczyk, Yngve Kristofferson, Galderic Lastras, Caroline Leck, Renata G. Lucchi, Giuseppe Masetti, Mathieu Morlighem, Julia Muchowski, Tøve Nielsen, Riko Noormets, Andreia Plaza‐Faverola, Megan M. Prescott, Autun Purser, Tine L. Rasmussen, Michele Rebesco, Eric Rignot, Søren Rysgaard, Anna Silyakova, Pauline Snoeijs, Atle Macdonald Sørensen, Fiammetta Straneo, David A. Sutherland, Alex J. Tate, Paola Travaglini, Nicole Trenholm, Esmee van Wijk, Luke Wallace, J. K. Willis, Michael Wood, Mark Zimmermann, Karl B. Zinglersen, Larry A. Mayer,

Arctic and Antarctic ice dynamics

Abstract Knowledge about seafloor depth, or bathymetry, is crucial for various marine activities, including scientific research, offshore industry, safety of navigation, and ocean exploration. Mapping the central Arctic Ocean is challenging due to the presence of perennial sea ice, which limits data collection to icebreakers, submarines, and drifting ice stations. The International Bathymetric Chart of the Arctic Ocean (IBCAO) was initiated in 1997 with the goal of updating the Arctic Ocean bathymetric portrayal. The project team has since released four versions, each improving resolution and accuracy. Here, we present IBCAO Version 5.0, which offers a resolution four times as high as Version 4.0, with 100 × 100 m grid cells compared to 200 × 200 m. Over 25% of the Arctic Ocean is now mapped with individual depth soundings, based on a criterion that considers water depth. Version 5.0 also represents significant advancements in data compilation and computing techniques. Despite these improvements, challenges such as sea-ice cover and political dynamics still hinder comprehensive mapping.