Split-beam echo sounder - navigation points, tracklines, and profile images for Simrad EK60 split-beam echo sounder data collected during USGS field activities 2017-001-FA and 2017-002-FA

Dates

Publication Date: 2020
Start Date: 2017-05-04
End Date: 2017-09-06

Citation

Baldwin, W.E., Moore, E.M., Worley, C.R., Nichols, A.R., and Ruppel, C.D., 2020, Marine geophysical data collected to support methane seep research along the U.S. Atlantic continental shelf break and upper continental slope between the Baltimore and Keller Canyons during U.S. Geological Survey Field Activities 2017-001-FA and 2017-002-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P9Y1MSTN.

Summary

In spring and summer 2017, the U.S. Geological Survey’s Gas Hydrates Project conducted two cruises aboard the research vessel Hugh R. Sharp to explore the geology, chemistry, ecology, physics, and oceanography of sea-floor methane seeps and water column gas plumes on the northern U.S. Atlantic margin between the Baltimore and Keller Canyons. Split-beam and multibeam echo sounders and a chirp subbottom profiler were deployed during the cruises to map water column backscatter, sea-floor bathymetry and backscatter, and subsurface stratigraphy associated with known and undiscovered sea-floor methane seeps. The first cruise, known as the Interagency Mission for Methane Research on Seafloor Seeps and designated as field activity 2017-001-FA, [...]

Summary

In spring and summer 2017, the U.S. Geological Survey’s Gas Hydrates Project conducted two cruises aboard the research vessel Hugh R. Sharp to explore the geology, chemistry, ecology, physics, and oceanography of sea-floor methane seeps and water column gas plumes on the northern U.S. Atlantic margin between the Baltimore and Keller Canyons. Split-beam and multibeam echo sounders and a chirp subbottom profiler were deployed during the cruises to map water column backscatter, sea-floor bathymetry and backscatter, and subsurface stratigraphy associated with known and undiscovered sea-floor methane seeps. The first cruise, known as the Interagency Mission for Methane Research on Seafloor Seeps and designated as field activity 2017-001-FA, was conducted from May 4 to May 11, 2017, and acquired geophysical data to support remotely operated vehicle exploration of seep sites using the Global Explorer, which is operated by Oceaneering International, Inc. Geophysical operations during cruise 2017-002-FA from August 25 to September 6, 2017, were also focused on mapping water column methane plumes, sea-floor seep sites, and subseafloor strata, but primarily supported conductivity, temperature, and depth instrument deployment, surface-water methane-concentration mapping, and water-sampling operations as part of a collaborative study with the University of Rochester of the effect of methane seepage on ocean water biogeochemistry. The National Oceanic and Atmospheric Administration’s Office of Ocean Exploration and Research partially sponsored cruise 2017-001-FA, and the U.S. Department of Energy partially sponsored both cruises.

Contacts

Contact :: Wayne E Baldwin
Originator :: Wayne E Baldwin, Eric Moore, Charles R Worley, Alexander R Nichols, Carolyn Ruppel
Principal Investigator :: Carolyn Ruppel
USGS Program :: Coastal and Marine Hazards and Resources Program
Data Owner :: Woods Hole Coastal and Marine Science Center
USGS Mission Area :: Energy and Minerals
Distributor :: U.S. Geological Survey - ScienceBase

Attached Files

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2017-001-FA_2017-002-FA_EK60_meta.xml Original FGDC Metadata	View	44.82 KB	application/fgdc+xml
2017-001-FA_2017-002-FA_EK60_Images.zip “Compressed zip archive of split-beam echo sounder profiles in PNG format.”		725.76 MB	application/zip
2017-001-FA_2017-002-FA_EK60_browse.jpg “Example split-beam echo sounder profile image.”		760.37 KB	image/jpeg

Shapefile: 2017-001-FA_2017-002-FA_EK60Tracklines.zip
2017-001-FA_2017-002-FA_EK60Tracklines.sbn		6.93 KB
2017-001-FA_2017-002-FA_EK60Tracklines.sbx		508 Bytes
2017-001-FA_2017-002-FA_EK60Tracklines.shp “Shapefile containing split-beam echo sounder profile locations.”		4.01 MB
2017-001-FA_2017-002-FA_EK60Tracklines.shx		5.57 KB
2017-001-FA_2017-002-FA_EK60Tracklines.cpg		5 Bytes
2017-001-FA_2017-002-FA_EK60Tracklines.dbf		1.44 MB
2017-001-FA_2017-002-FA_EK60Tracklines.prj		145 Bytes

Shapefile: 2017-001-FA_2017-002-FA_EK60NavPoints_1min.zip
2017-001-FA_2017-002-FA_EK60NavPoints_1min.cpg		5 Bytes
2017-001-FA_2017-002-FA_EK60NavPoints_1min.dbf		29.57 MB
2017-001-FA_2017-002-FA_EK60NavPoints_1min.prj		145 Bytes
2017-001-FA_2017-002-FA_EK60NavPoints_1min.sbn		189.93 KB
2017-001-FA_2017-002-FA_EK60NavPoints_1min.sbx		4.26 KB
2017-001-FA_2017-002-FA_EK60NavPoints_1min.shp “Shapefile containing split-beam echo sounder 1-minute navigation points.”		542.6 KB
2017-001-FA_2017-002-FA_EK60NavPoints_1min.shx		155.1 KB

Related External Resources

Type: Related Primary Publication

Demopoulos, A., McClain-Counts, J., Bourque, J., Prouty, N., Smith, B., Brooke, S.D., Ross, S., and Ruppel, C., 2019, Examination of Bathymodiolus childressi nutritional sources, isotopic niches, and food-web linkages at two seeps in the US Atlantic margin using stable isotope analysis and mixing models: Deep Sea Research Part I, 148, 53-66.	https://doi.org/10.1016/j.dsr.2019.04.002
Leonte, M., Ruppel, C. D., Ruiz‐Angulo, A., & Kessler, J. D. (2020). Surface methane concentrations along the Mid‐Atlantic Bight driven by aerobic subsurface production rather than seaﬂoor gas seeps: Journal of Geophysical Research: Oceans, vol. 125.	https://doi.org/10.1029/2019JC015989
Ruppel, C., Demopoulos, A., and Prouty, N., 2018, Exploring US Mid-Atlantic Margin Methane Seeps: IMMeRSS, May 2017: Supplement to Oceanography, 31(1), p. 93.	https://doi.org/10.5670/oceanog.2018.supplement.01

Purpose

This dataset contains 1-minute navigation points, tracklines, and profile images for approximately 2200 km of Simrad EK60 split-beam echo sounder data collected by the U.S. Geological Survey during USGS field activities 2017-001-FA and 2017-002-FA (also referred to as HRS1704 and HRS1713, respectively) along the U.S. Atlantic continental shelf break and upper continental slope between Baltimore and Keller Canyons. Images of the water column profile data were generated in order to provide portable and easily viewable alternatives to the Simrad .raw versions of the data. Each profile image can be hotlinked to its corresponding trackline navigation contained within the Esri polyline shapefile '2017-001-FA_2017-002-FA_EK60Tracklines.shp'. The 5-minute index annotations along the bottom of the PNG images correlate to the positions of associated times in the 1-minute navigation Esri point shapefile '2017-001-FA_2017-002-FA_EK60NavPoints_1min.shp'. This information allows for spatial correlation of the split-beam echo sounder profile images with other geophysical and sample data for investigating water column backscatter in relation to seafloor morphology and stratigraphy in the area.

Split-beam echo sounder - navigation points, tracklines, and profile images for Simrad EK60 split-beam echo sounder data collected during USGS field activities 2017-001-FA and 2017-002-FA

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