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Metadata
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ID
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P-1-95-MB
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Abstract
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Chief Scientist: Steve Eittreim. Data (multibeam, GPS,
CTDmeter) of field activity P-1-95-MB in Monterey Bay from
07/29/1995 to 08/02/1995
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Project/Theme
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Monterey Bay National Marine Sanctuary
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National Plan
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Environment
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Chief Scientist
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Steve Eittreim
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Platform
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Pacific Hunter
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Area of Operation
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Monterey Bay
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Location map
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Bounding Coordinates
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36.77509
-121.99269 -121.82182
36.60737
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Dates
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07/29/1995 (JD 210) to 08/02/1995 (JD 214)
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Analog Materials
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list
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Index map
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Crew
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Steve Eittreim
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Chief Scientist, USGS Western Region
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Equipment Used
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Purpose
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Seafloor mapping in the offshore Ft Ord region
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to characterize the nature of the seafloor morphology and geology
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Information to be Derived
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2-m bathymetry and acoustic imagery
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Summary
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175 square kilometers were swath-mapped covering most of the southern
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Monterey Bay shelf with the exception of the outer shelf beyond 95 m water
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depths; coverage included the shelf northwest of Monterey Peninsula. The data is
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hampered by some noise problems due to rough weather and to patchiness in water
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velocity distributions and to wave motion of the transducer vertically through
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the thermocline. 2-meter, shaded-relief contour maps at 1:5000 have been
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produced and the backscatter imagery maps are still in the data-processing
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stage.
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Notes
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Associated activities:
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M-1-93-MB
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J-1-94-MB
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J-2-95-MB
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J-6-95-MB
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M-2-95-MB
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P-1-95-MB
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P-3-95-MB
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R-1-95-MB
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M-1-96-MB
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J-1-97-MB
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J-3-97-MB
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A-4-98-MB
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J-3-98-MB
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J-4-98-MB
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(from USGS Bulletin 8/18/95)
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The Monterey Bay National Marine Sanctuary Project
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was the beneficiary of a high-resolution multibeam bathymetric
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survey last week as Humboldt State University's R/V PACIFIC
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HUNTER mowed the grass on the southern Monterey Bay shelf. The 5-
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day survey revealed a new trend of seafloor mounds in a north-south
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alignment northward out from the Peninsula. A relationship to the
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Monterey Bay fault zone is suggested by the linear edges of some of
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these mounds, parallel to the Monterey Bay fault zone. Both swath
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bathymetry and backscatter imagery were collected and gave
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complimentary information about the seafloor geology. The
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nearshore sand-bands/ribbons, previously mapped by Hunter et al,
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were imaged in detail, as was the major pipeline south of the
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Salinas River. Our crew of Steve Eittreim, Andy Stevenson and
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Roberto Anima were coached by the visiting dean of multibeam,
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Larry Mayer of the Univ. of New Brunswick, Canada. The Simrad EM-
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1000 system, apparently the state of the art in multibeam bathy,
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was in some contrast to the platform used: The PACIFIC HUNTER is a
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1927 refitted 125-foot coast guard cutter recently given a new life
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as research vessel, thanks to gargantuan efforts on the part of folks
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at HSU. She will be berthed at Redwood City for a couple of weeks
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before repair of one engine and the trek back to Humboldt Bay.
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Publications
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Eittreim, Stephen L., and Noble, Marlene, editors, 2002, Seafloor geology and
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natural environment of the Monterey Bay National Marine Sanctuary: Marine Geology, v
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. 181
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http://www.sciencedirect.com/
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Journals > m > Marine Geology > Volumes 181 - 190 > Volume 181, Issues 1-3
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Wong, F.L., and Eittreim, S.L., 2001, Continental Shelf GIS for the Monterey
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Bay National Marine Sanctuary: U.S. Geological Survey Open-file Report 01-179,
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1 CDROM,
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http://geopubs.wr.usgs.gov/
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open-file/of01-179/
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Got Help?
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For P-1-95-MB, we would appreciate any information on -- activity type, information to be derived, equipment used, information specialist, organization, ports, publications, purpose, summary.
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