2017-002-FA (CMHRP activity #7343)

Field Activity 2017-002-FA

Identifier

2017-002-FA

Purpose

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

Location

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

Summary

Collected geophysical data, CTDs, and water column methane carbon from roughly Baltimore Canyon south to Cape Hatteras. Data will be used to determine source of methane in water column, to identify new methane seeps, and to study deep-seated ocean acidification related to aerobic oxidation of methane in the water column. Geophysical data include some focused multibeam grids in places south to Cape Hatteras where we have not previously been able to acquire data.

Info derived

bathymetry, seafloor backscatter, water column backscatter

Projects

USGS GAS HYDRATES

Platform

Hugh R. Sharp

Length 146 feet/ beam 32 feet.

Itinerary

Start	Lewes, DE	2017-08-25
End	Lewes, DE	2017-09-06
Days in the field	14

Bounds

West	-76.26708984
East	-73.56445313
North	38.89103283
South	34.95799531

Personnel

Organization

USGS, Woods Hole Coastal and Marine Science Center(WHCMSC)

384 Woods Hole Road

Quissett Campus

Woods Hole, MA02543-1598

(508) 548-8700

Principal investigators

Carolyn Ruppel

Crew members

(not identified)

Scientist, Staff

Information specialist(s)

Carolyn Ruppel

Specialist, Information

Affiliate principal

John Kessler, University of Rochester

Data types and categories

Data category:	Location-Elevation, Seismics, Environmental Data, Sonar
Data type:	Navigation, Sub Bottom Profiler, Water column reflectivity, CTD, Multibeam

Equipment used

Equipment	Usage description	Data types	Datasets
POS-MV	Navigation data were acquired using the WGS 84 coordinate system with an Applanix POS MV Wavemaster (model 220, v5), which blends Global Navigation Satellite System (GNSS) and acceleration data from an Inertial Motion Unit (IMU) and GPS azimuthal heading.	Navigation	(no data reported)
SBE 911plus CTD		CTD	1
Edgetech chirp subbottom profiler 512i		Sub Bottom Profiler	1
SIMRAD EK60		Surveys (biological), Surveys (geochemical), Multibeam, Water column reflectivity	1
Reson 7160 (used in WH)		Multibeam	3

Datasets

Datasets produced in this activity

Dataset name	Equipment	Description	Dataset contact
2017-002-FA_SB512i	Edgetech chirp subbottom profiler 512i	Chirp seismic reflection - shotpoints, tracklines, profile images, and SEG-Y traces for EdgeTech SB-512i chirp data collected during USGS field activity 2017-002-FA along the U.S. Atlantic continental shelf break and upper continental slope between the Baltimore and Keller Canyons	Wayne E Baldwin

Datasets compiled from multiple sources

Dataset name	Equipment	Description	Dataset contact
2017-001-FA_2017-002-FA_SVPdata	SBE 911plus CTD	Sound velocity profiles - locations, images, and text files for sound velocity profiles calculated from XBT and CTD casts conducted during USGS field activities 2017-001-FA and 2017-002 FA along the U.S. Atlantic continental shelf break and upper continental slope between the Baltimore and Keller Canyons
2017-001-FA_2017-002-FA_EK60	SIMRAD EK60	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 along the U.S. Atlantic continental shelf break and upper continental slope between the Baltimore and Keller Canyons	Wayne E Baldwin
2017-001-FA_2017-002-FA_7160Backscatter	Reson 7160 (used in WH)	Multibeam echo sounder - GeoTIFF images for processed Reson 7160 seafloor backscatter data collected during USGS field activities 2017-001-FA and 2017-002-FA along the U.S. Atlantic continental shelf break and upper continental slope between the Baltimore and Keller Canyons	Wayne E Baldwin
2017-001-FA_2017-002-FA_7160Bathymetry	Reson 7160 (used in WH)	Multibeam echo sounder - GeoTIFF grids for processed Reson 7160 seafloor bathymetry data collected during USGS field activities 2017-001-FA and 2017-002-FA along the U.S. Atlantic continental shelf break and upper continental slope between the Baltimore and Keller Canyons	Wayne E Baldwin
2017-001-FA_2017-002-FA_7160Tracklines	Reson 7160 (used in WH)	Multibeam echo sounder - navigation tracklines for Reson 7160 data collected during USGS field activities 2017-001-FA and 2017-002-FA along the U.S. Atlantic continental shelf break and upper continental slope between the Baltimore and Keller Canyons	Wayne E Baldwin