Dataset Information

The International Bathymetric Chart of the Arctic Ocean Version 4.0.

ABSTRACT: 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.

SUBMITTER: Jakobsson M

PROVIDER: S-EPMC7347603 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature

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The International Bathymetric Chart of the Arctic Ocean Version 4.0.

Jakobsson Martin M Mayer Larry A LA Bringensparr Caroline C Castro Carlos F CF Mohammad Rezwan R Johnson Paul P Ketter Tomer T Accettella Daniela D Amblas David D An Lu L Arndt Jan Erik JE Canals Miquel M Casamor José Luis JL Chauché Nolwenn N Coakley Bernard B Danielson Seth S Demarte Maurizio M Dickson Mary-Lynn ML Dorschel Boris B Dowdeswell Julian A JA Dreutter Simon S Fremand Alice C AC Gallant Dana D Hall John K JK Hehemann Laura L Hodnesdal Hanne H Hong Jongkuk J Ivaldi Roberta R Kane Emily E Klaucke Ingo I Krawczyk Diana W DW Kristoffersen Yngve Y Kuipers Boele R BR Millan Romain R Masetti Giuseppe G Morlighem Mathieu M Noormets Riko R Prescott Megan M MM Rebesco Michele M Rignot Eric E Semiletov Igor I Tate Alex J AJ Travaglini Paola P Velicogna Isabella I Weatherall Pauline P Weinrebe Wilhelm W Willis Joshua K JK Wood Michael M Zarayskaya Yulia Y Zhang Tao T Zimmermann Mark M Zinglersen Karl B KB

Scientific data 20200709 1

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 resolutio ...[more]

PMID: 32647176

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Project description:BackgroundThe Chicago Classification version 4.0 (CCv4.0) of ineffective esophageal motility (IEM) is more stringent than the Chicago Classification version 3.0 (CCv3.0) definition. We aimed to compare the clinical and manometric features of patients meeting CCv4.0 IEM criteria (group 1) versus patients meeting CCv3.0 IEM but not CCv4.0 criteria (group 2).MethodsWe collected retrospective clinical, manometric, endoscopic, and radiographic data on 174 adults diagnosed with IEM from 2011 to 2019. Complete bolus clearance was defined as evidence of exit of the bolus by impedance measurement at all distal recording sites. Barium studies included barium swallow, modified barium swallow, and barium upper gastrointestinal series studies, and collected data from these reports include abnormal motility and delay in the passage of liquid barium or barium tablet. These data along with other clinical and manometric data were analyzed using comparison and correlation tests. All records were reviewed for repeated studies and the stability of the manometric diagnoses.ResultsMost demographic and clinical variables were not different between the groups. A lower mean lower esophageal sphincter pressure was correlated with greater percent of ineffective swallows in group 1 (n = 128) (r = -0.2495, P = 0.0050) and not in group 2. In group 1, increased percent of failed contractions on manometry was associated with increased incomplete bolus clearance (r = 0.3689, P = 0.0001). No such association was observed in group 2. A lower median integrated relaxation pressure was correlated with greater percent of ineffective contractions in group 1 (r = -0.1825, P = 0.0407) and not group 2. Symptom of dysphagia was more prevalent (51.6% versus 69.6%, P = 0.0347) in group 2. Dysphagia was not associated with intrabolus pressure, bolus clearance, barium delay, or weak or failed contractions in either group. In the small number of subjects with repeated studies, a CCv4.0 diagnosis appeared more stable over time.ConclusionsCCv4.0 IEM was associated with worse esophageal function indicated by reduced bolus clearance. Most other features studied did not differ. Symptom presentation cannot predict if patients are likely to have IEM by CCv4.0. Dysphagia was not associated with worse motility, suggesting it may not be primarily dependent on bolus transit.

Dataset Information

The International Bathymetric Chart of the Arctic Ocean Version 4.0.

Publications

The International Bathymetric Chart of the Arctic Ocean Version 4.0.

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