Wintersteller, Paul; Titschack, Jürgen; Gaide, Stefanie; Hanebuth, Till J J; Freiwald, André; Westphal, Hildegard (2017): Gridded EM1002 multibeam-echosounder bathymetry of cruise MSM16-3 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.883754
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Abstract:
Gridded bathymetry based on data acquisition during MSM16-3 between 13.10.2010 and 20.11.2010 at the Mauritanian shelf. The expedition aimed at a comprehensive understanding of the complex sedimentary system off Mauritania as an atypical tropical ecosystem and an archive of paleoclimatic change in Africa in the Holocene. Responsible person during this cruise / PI: Andre Freiwald, Till Hanebuth & Stephen Schilling
Chief Scientist: Hildegard Westphal (director.zmt leibniz-zmt.de)
Related to:
Westphal, Hildegard (2010): Short Cruise Report Maria S. Merian Cruise MSM16/3 - Bremerhaven / Germany - Mindelo / Cap Verde - October 13th - November 20th, 2010. Leibniz Center for Marine Tropical Ecology, Bremen, Germany, 30 pp, https://doi.org/10.2312/expedition-msm16-3
Westphal, Hildegard; Beuck, Lydia; Braun, Stefan; Freiwald, André; Hanebuth, Till J J; Hetzinger, Steffen; Klicpera, André; Kudrass, Hermann-Rudolph; Lantzsch, Hendrik; Lundälv, Tomas; Vicens, Guillem Mateu; Preto, Nereo; von Reumont, Jonas; Schilling, Stephen; Taviani, Marco; Wienberg, Claudia (2014): Phaeton - Paleoceanographic and paleo-climatic record on the Mauritanian Shelf - Cruise No. MSM16/3 - October 13 - November 20, 2010 - Bremerhaven (Germany) - Mindelo (Cap Verde). MARIA S. MERIAN-Berichte, DFG-Senatskommission für Ozeanographie, MSM16/3, 57 pp, https://doi.org/10.2312/cr_msm16_3
Further details:
Project(s):
Coverage:
Median Latitude: 35.226800 * Median Longitude: -8.221400 * South-bound Latitude: 16.886100 * West-bound Longitude: -24.997600 * North-bound Latitude: 53.567500 * East-bound Longitude: 8.554800
Date/Time Start: 2010-10-13T00:00:00 * Date/Time End: 2010-11-20T00:00:00
Event(s):
MSM16/3-track * Latitude Start: 53.567500 * Longitude Start: 8.554800 * Latitude End: 16.886100 * Longitude End: -24.997600 * Date/Time Start: 2010-10-13T00:00:00 * Date/Time End: 2010-11-20T00:00:00 * Campaign: MSM16/3 * Basis: Maria S. Merian * Method/Device: Underway cruise track measurements (CT) * Comment: Bremerhaven - Mindelo
Comment:
Description of processed data sources:
During the cruise MSM16-3 shallow bathymetric surveys were conducted with the Kongsberg EM1002 shallow multibeam echosounder, mounted in the moon-pool. The EM1002 uses a nominal sounding frequency of 95 kHz. 111 beams are formed for each ping while the seafloor is detected using amplitude and phase information for each beam sounding. For further information consult http://www.tdi-bi.com/downloads/EM1002_Product_specification.pdf
Description of data processing:
Postprocessing and products were conducted by the Seafloor-Imaging group of MARUM, responsible person & CI Citation: Jürgen Titschack (jtitschack@marum.de) & Paul Wintersteller (seafloor-imaging@marum.de). The MB-system suite (Caress, D.W., and D.N. Chayes, MB-System Version 5, an open source software distributed from the MBARI and L-DEO web sites, 2000-2017.) was utilized for this purpose. A tide correction was applied, based on the Oregon State University (OSU) tidal prediction software (OTPS) that is retrievable through MB-System. Further roll, pitch, heave were not applied for the MSM16-3 data. Bathymetric data has been manually cleaned for existing artefacts with mbeditviz. The data has been ray-traced using different sound velocity profiles (SVP) manually modified after CTDs taken in the area and/or global SVP/CTD databases. NetCDF (GMT) grids of the product and the statistics were created using mbgrid. No total propagated uncertainty (TPU) has been calculated to gather vertical or horizontal accuracy. The currently published bathymetric grid of the cruise has a resolution of 70 m. A higher resolution is, at least partly, achievable. The grid extended with _num represents a raster dataset with the statistical number of beams/depths taken into account to create the depth of the cell. The extended "_sd"-grid contains the standard deviation for each cell.
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
1.3 MBytes