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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 2017-002-FA

Other ID: none

Status: Pending

Organization(s): USGS, Woods Hole Coastal and Marine Science Center

Funding Program(s): USGS GAS HYDRATES (LQ000FP)

Principal Investigator(s): Carolyn Ruppel

Affiliate Investigator(s): John Kessler, University of Rochester

Information Specialist(s): Carolyn Ruppel

Data Type(s): Location-Elevation: Navigation, Seismics: Sub Bottom Profiler, Sonar: Water column reflectivity, Environmental Data: CTD, Sonar: Multibeam

Scientific Purpose/Goals: Water column/seafloor imaging and CTDs to constrain impact of methane seepage on seafloor-water column-atmosphere system


Start Port/Location: Lewes, DE

End Port/Location: Lewes, DE

Start Date: 2017-08-25

End Date: 2017-09-06

Equipment Used: POS-MV, Edgetech chirp subbottom profiler 512i, SIMRAD EK60, Reson 7160 (used in WH), CTD 19+ with OBS, PAR, DO, Chl

Information to be Derived: bathymetry, seafloor backscatter, water column backscatter

Summary of Activity and Data Gathered:

Staff: Other

Affiliate Staff:

Notes: Please reserve the PosMV Wavemaster.

USGS is not lead on this program. We would supply some instrumentation and assistance, but this is largely a CTD program run with the Sharp's native CTD system by John Kessler and his group at Rochester.


Mid-Atlantic outer shelf and upper continental slope, Hatteras to Wilmington Canyons

North: 39.40542773 South: 35.96220116 West: -74.9048 East: -72.07356771


photo of Hugh R. Sharp
Hugh R. Sharp


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,

Joung, D., Ruppel, C.D., Southon, J., Weber, T.S., Kessler, J.K., No Evidence of Atmospheric Emission of Methane from Decomposing Hydrates at Mid Latitudes: Nature Geoscience, .

Kessler, J.D., Ruppel, C.D., Joung, D., Garcia-Tigreros, F., and Leonte, M., 2018, Exploring the Impact of Widespread Seafloor Methane Seepage on Atmospheric Methane Emissions and Ocean Chemistry: Methane Hydrate News, Fire in the Ice, vol. 18, Issue 1,

Leonte, M., Ruppel, C.D., Ruiz-Angelo, A., and 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, v. 125, issue 5,


Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
POS-MV --- Navigation
Edgetech chirp subbottom profiler 512i --- Sub Bottom Profiler
SIMRAD EK60 --- Surveys (biological)
Surveys (geochemical)
Water column reflectivity
Reson 7160 (used in WH) --- Multibeam
CTD 19+ with OBS, PAR, DO, Chl --- CTD

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