The International Bathymetric Chart of the Arctic Ocean Version 4.0.
Martin JakobssonLarry A MayerCaroline BringensparrCarlos F CastroRezwan MohammadPaul JohnsonTomer KetterDaniela AccettellaDavid AmblasLu AnJan Erik ArndtMiquel CanalsJosé Luis CasamorNolwenn ChauchéBernard CoakleySeth L DanielsonMaurizio DemarteMary-Lynn DicksonBoris DorschelJulian A DowdeswellSimon DreutterAlice C FremandDana GallantJohn K HallLaura HehemannHanne HodnesdalJongkuk HongRoberta IvaldiEmily KaneIngo KlauckeDiana W KrawczykYngve KristoffersenBoele R KuipersRomain MillanGiuseppe MasettiMathieu MorlighemRiko NoormetsMegan M PrescottMichele RebescoEric RignotIgor SemiletovAlex J TatePaola TravagliniIsabella VelicognaPauline WeatherallWilhelm WeinrebeJoshua K WillisMichael WoodYulia ZarayskayaTao ZhangMark ZimmermannKarl B ZinglersenPublished in: Scientific data (2020)
Bathymetry (seafloor depth), is a critical parameter providing the geospatial context for a multitude of marine scientific studies. Since 1997, the International Bathymetric Chart of the Arctic Ocean (IBCAO) has been the authoritative source of bathymetry for the Arctic Ocean. IBCAO has merged its efforts with the Nippon Foundation-GEBCO-Seabed 2030 Project, with the goal of mapping all of the oceans by 2030. Here we present the latest version (IBCAO Ver. 4.0), with more than twice the resolution (200 × 200 m versus 500 × 500 m) and with individual depth soundings constraining three times more area of the Arctic Ocean (∼19.8% versus 6.7%), than the previous IBCAO Ver. 3.0 released in 2012. Modern multibeam bathymetry comprises ∼14.3% in Ver. 4.0 compared to ∼5.4% in Ver. 3.0. Thus, the new IBCAO Ver. 4.0 has substantially more seafloor morphological information that offers new insights into a range of submarine features and processes; for example, the improved portrayal of Greenland fjords better serves predictive modelling of the fate of the Greenland Ice Sheet.