Multibeam bathymetry data of discovery gap in the eastern North Atlantic

Ivan Dudkov; Evgenia Dorokhova

doi:10.1016/j.dib.2020.105679

Multibeam bathymetry data of discovery gap in the eastern North Atlantic

Data Brief. 2020 May 13:31:105679. doi: 10.1016/j.dib.2020.105679. eCollection 2020 Aug.

Authors

Ivan Dudkov^{1

2}, Evgenia Dorokhova¹

Affiliations

¹ Shirshov Institute of Oceanology, Russian Academy of Sciences.
² Immanuel Kant Baltic Federal University.

Abstract

We present a multibeam bathymetry dataset of Discovery Gap; a narrow gap in ridge of the Azores-Gibraltar Fracture Zone (eastern North Atlantic). The gap serves as gateway for the exchange of deep water between the Madeira and Iberian abyssal plains. A bathymetric survey was carried out during the 43^rd cruise of the research vessel (R/V) Akademik Nikolaj Strakhov in October 2019. The data were collected with the acquisition system RESON SeaBat 7150 (12.5 kHz), using the integrated navigation system Applanix POS MV, and processed using QINSy software. The multibeam bathymetry data are presented in tabular format (ASCII-table (*.txt), spreadsheets (*.xlsx)), and as a digital elevation model (DEM) of the bottom relief. The DEM was created using ArcGIS software in ESRI-ASCII-grid (*.asc) and GeoTIFF raster (*.tif) formats with a spatial resolution of 100 m. We provide processed data that can be used directly for further studies. The dataset is available with the article.

Keywords: Deep ocean gateway; Digital elevation model; Geomorphology; Multibeam swath bathymetry.