Sediment echosounder raw data (Atlas Parasound P70 echosounder entire dataset) of RV MARIA S. MERIAN during cruise MSM98

DOI

Sediment echosounder data using Atlas Parasound P70 echosounder was recorded during MARIA S. MERIAN cruise MSM98, which took place in the North Sea from 2021-01-08 to 2021-01-23. The main objective of the cruise was focused on the hydrocarbon fluid emissions in the German North Sea and focused on the 'Entenschnabel'- area. During MSM98 the newly detected gas emissions were investigated in detail regarding its quantities, temporal and spatial variability, source and fate. Description of data source: During the MSM98 cruise, the hull-mounted parametric sub-bottom profiler ATLAS PARASOUND P70 was used to conduct information about the sediment sub-surface and water column. Its function is based on the parametric effect of the non-linear relation of pressure and density during sonar propagation. The system utilizes two high-intensity waves with frequencies of 18-20 kHz (primary high frequency; PHF) and 22-24 kHz to create a secondary high (about 40-42 kHz) and secondary low frequency (SLF) of about 4 kHz. The SLF can record sub-bottom structures, whereas the PHF can image the water column and potential gas bubbles, plankton ,fish or nepheloid layers within. The transducer array has an opening angle of 4° by 5°, which corresponds to a footprint size of about 7% of the water depth. Data acquisition was performed using measured real-time values of surface sound velocity and a static sound velocity profile of 1500 m/s. Using the software ATLAS PARASTORE, data was displayed and stored as raw .asd files and additional .ps3 and auxiliary files for certain depth windows. The *.ps3 files were utilized for conversion to SEG-Y format and further processing using the software SeNT (developed by V. Spiess & H. Keil, MTU-GeoB) and Kingdom Suite. For further information on the system, consult: https://epic.awi.de/id/eprint/26733/7/ATLAS_PARASOUND_2015-02.pdf. The sub-bottom profiler was operating almost continuously with a desired frequency of 4 kHz for SLF and a desired frequency of 18 kHz for PHF. Most of the time the system run as continuous wave for water column analyisis.

Identifier
DOI https://doi.org/10.1594/PANGAEA.937631
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.937631
Provenance
Creator Gaide, Stefanie ORCID logo; Römer, Miriam ORCID logo
Publisher PANGAEA
Publication Year 2021
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 6424 data points
Discipline Earth System Research
Spatial Coverage (6.371W, 53.860S, 6.901E, 54.013N); North Sea
Temporal Coverage Begin 2021-01-08T12:25:00Z
Temporal Coverage End 2021-01-22T21:30:00Z