|
|
|
Metadata
|
|
ID
|
O-2-99-SC
|
|
Abstract
|
Chief Scientists: Homa Lee, Brian Edwards. Sampling data
(pistoncore, 3dot5khz, boxcore, Kastencore, vibratingcore,
VanVeengrab) of field activity O-2-99-SC in Los Angeles
Shelf, California from 06/17/1999 to 06/24/1999
|
|
Project/Theme
|
Los Angeles Shelf Pollution and Waste Disposal Project
|
|
Chief Scientist
|
Homa Lee
Brian Edwards
|
|
Activity Type
|
sampling
|
|
Platform
|
Ocean Olympic
|
|
Area of Operation
|
Los Angeles Shelf, California
|
|
Location map
|
|
|
Bounding Coordinates
|
34.13035
-119.23401 -117.22647
32.62611
|
|
Dates
|
06/17/1999 (JD 168) to 06/24/1999 (JD 175)
|
|
Analog Materials
|
list
|
|
Index map
|
|
|
Crew
|
|
Homa Lee
|
Chief Scientist, USGS Western Region
|
|
Brian Edwards
|
Co-chief Scientist, USGS Western Region
|
|
Bill Robinson
|
Electrical Technician, USGS Western Region
|
|
Jon Kolak
|
Geochemist, USGS Western Region
|
|
Megan McQuarrie
|
Navigation, ORAU
|
|
Wendy Dahl
|
Navigation/FACS, Eco
|
|
Kathy Presto
|
Geologist/210 Pb, ORAU
|
|
Gini Gandhok
|
Geologist, Volunteer
|
|
Tim Elfers
|
Geologist/210 Pb Specialist, Skidaway
|
|
Jim Nickels
|
Vibracore Technician, ASI
|
|
Hal Williams
|
Marine Technician, USGS Western Region (off 6/19/99)
|
|
Chris Sommerfield
|
Geologist, USGS Woods Hole
|
|
Hank Chezar
|
Camera, USGS Western Region (on 6/19/99)
|
|
Kevin O'Toole
|
Marine Technician, USGS Western Region
|
|
Walt Olson
|
Marine Technician, USGS Western Region
|
|
Roger Lewis
|
Biologist, On and Off 6/23/99 (1500-2300)
|
|
Russ Brigendine
|
Captain,
|
|
Jeff Stringer
|
1st Mate,
|
|
Paul Giron
|
2nd Mate
|
|
Dave Malsch
|
Chief Engineer
|
|
Mike Hill
|
Cook
|
|
Joe Kelly
|
Deckhand,
|
|
|
Equipment Used
|
|
pistoncore
|
|
3dot5khz
|
|
boxcore
|
|
Kastencore
|
|
vibratingcore
|
|
VanVeengrab
|
|
|
Purpose
|
|
Our goal was to move as much bottom sediment onto
|
|
the ship as we could over the next two weeks. Our coring operations had a
|
|
variety of purposes and extended all the way from near San Diego to the northern
|
|
edge of Monterey Bay.
|
|
|
Information to be Derived
|
|
During the first two days of the cruise, 12 piston cores were taken ranging
|
|
in length up to 4 m. The cores and all sediment samples were logged for density,
|
|
sound velocity, and magnetic susceptibility using a multi-sensor logger.
|
|
The next five days, 20 piston cores, 15 vibracores, 31 box cores, 6 grab
|
|
samples, and 1 kasten core were acquired. A bottom photograph was taken with
|
|
each box core using Hank Chezar's camera system. A representative of the
|
|
City of Los Angeles Department of Sanitation sampled box cores for living things.
|
|
Jon Kolak sampled some station stations as part of a study of hydrocarbons
|
|
in sediment. The grab samples were taken for Pete Dartnell, who is working to
|
|
use acoustic backscatter measurements as a measure of habitat. Five cores were
|
|
taken for the Southern California Coastal Water Research Project to be analyzed
|
|
for pesticides and metals. On June 25, a group of Monterey Bay Aquarium Research
|
|
Institute scientists began a five-day piston-coring venture. 25 piston cores were
|
|
taken for MBARI in three different environments; a heavily pockmarked area of
|
|
Big Sur, a feature identified as "Smooth Ridge" in Western Monterey Bay, and the
|
|
head of Monterey Canyon. The last day was spent in Monterey Bay taking 8 box cores
|
|
for Jon Kolak. Roger Lewis will be using PB210 methods to determine accumulation
|
|
rates, and jon will be looking at geochemical tracers to estimate the original
|
|
source of the sediment.
|
|
|
Summary
|
|
The first two days were dedicated to taking piston cores at locations
|
|
that had been preselected by Bill Normark. Bill's goal was to sample sedimentary
|
|
reflectors that could be identified in the Huntec lines and subsequently dated.
|
|
This chronologic information could then be used to estimate most recent movement
|
|
on observed faults. In all, 12 pistons cores were taken, ranging in length up to
|
|
4 m. These, and all of the other sediment smples taken on our cruises, were
|
|
logged for density, sound velocity, and magnetic susceptibility using our
|
|
multi-sensor logger.
|
|
|
Notes
|
|
related field activity -- O-1-99-SC (geophysics)
|
|
for first 2 days of O-2-99-SC
|
|
The next five days were committed to the Los Angeles Shelf Pollution and
|
|
Waste Disposal Project. The goals of our project are to understand the
|
|
sedimentology and oceanography of Santa Monica Bay, one of the most
|
|
human-impacted offshore areas on the West Coast, and to use this
|
|
understanding to forecast the fate of contaminated sediment. This is
|
|
our last major sampling year, and we used this opportunity to obtain
|
|
cores for a broad variety of purposes. In all, we acquired 20 piston
|
|
cores, 15 vibracores, 31 box cores, 6 grab samples, and one very smelly
|
|
Kasten core from a "sludge" deposit. We will be dating the piston,
|
|
box, and vibracore samples using Pb-210 and C-14 techniques to develop
|
|
a better understanding of sedimentation conditions in Santa Monica
|
|
Bay during the late Holocene with special emphasis on the last 100 years.
|
|
Chris Sommerfield, a USGS post-doc at Woods Hole, is focusing on the
|
|
last few thousand years, and Clark Alexander, as part of a coop with
|
|
the Skidaway Institute of Oceanography, is considering the last 100
|
|
years. A bottom photograph was taken with each box core using Hank
|
|
Chezar's camera system. A representative of the City of Los Angeles,
|
|
Department of Sanitation, participated in one day of the cruise, sampling
|
|
box cores for living things. Jon Kolak, a USGS post-doc in Menlo Park,
|
|
sampled some stations as part of a study of hydrocarbons in sediment.
|
|
The grab samples were taken for Pete Dartnell, who is working to use
|
|
acoustic backscatter measurements as a measure of habitat. Five cores
|
|
were taken for the Southern California Coastal Water Research Project
|
|
to be analyzed for pesticides and metals. Our sampling work in Santa
|
|
Monica Bay was hugely successful, and we now have adequate sample
|
|
resources to complete our study.
|
|
|
Publications
|
|
Lee, H.J., McQuarrie, Megan, and Hibbeler, Lori, 2003, Tracking contaminants
|
|
in Santa Monica Bay, offshore of Greater Los Angeles: U.S. Geological Survey
|
Fact Sheet 155-02: geopubs.wr.usgs.gov/fact-sheet/fs155-02/
|
|
|
Lee, Homa J., and Weisberg, Stephen, eds., 2003, Integrated assessment of an
|
|
urban water body; Santa Monica Bay, California: Marine Environmental Research,
|
v. 56, no. 1-2, 342 p.
|
|
|
Dojiri, M., Yamaguchi, M., Weisberg, S.B., and Lee, Homa J., 2003,
|
|
Changing anthropogenic influence on the Santa Monica Bay watershed,
|
|
in Lee, Homa J., and Weisberg, Stephen, eds., Integrated assessment
|
|
of an urban water body; Santa Monica Bay, California: Marine Environmental
|
Research, v. 56, no. 1-2, p. 1-14.
|
|
|
Gardner, James V., Dartnell, Peter, Mayer, Larry A., and Hughes Clarke,
|
|
John E., 2003, Geomorphology, acoustic backscatter, and processes in Santa
|
|
Monica Bay from multibeam mapping, in Lee, Homa J., and Weisberg, Stephen, eds.,
|
|
Integrated assessment of an urban water body; Santa Monica Bay, California:
|
Marine Environmental Research, v. 56, no. 1-2, p. 15-4.
|
|
|
Edwards, Brian D., Dartnell, Peter, and Chezar, Henry, 2003, Characterizing
|
|
benthic substrates of Santa Monica Bay with seafloor photography and multibeam
|
|
sonar imagery, in Lee, Homa J., and Weisberg, Stephen, eds., Integrated
|
|
assessment of an urban water body; Santa Monica Bay, California: Marine
|
Environmental Research, v. 56, no. 1-2, p. 47-66.
|
|
|
Leecaster, Molly, 2003, Spatial analysis of grain size in Santa Monica Bay,
|
|
in Lee, Homa J., and Weisberg, Stephen, eds., Integrated assessment
|
|
of an urban water body; Santa Monica Bay, California: Marine Environmental
|
Research, v. 56, no. 1-2, p. 67-78
|
|
|
Hein, James R., Dowling, Jennifer S., Schuetze, Anthony, and Lee, Homa J.,
|
|
2003, Clay-mineral suites, sources, and inferred dispersal routes; Southern
|
|
California continental shelf, in Lee, Homa J., and Weisberg, Stephen, eds.,
|
|
Integrated assessment of an urban water body; Santa Monica Bay, California:
|
Marine Environmental Research, v. 56, no. 1-2, p. 79-102
|
|
|
Noble, Marlene A., and Xu, J.P., 2003, Observations of large-amplitude
|
|
cross-shore internal bores near the shelf break, Santa Monica Bay, CA,
|
|
in Lee, Homa J., and Weisberg, Stephen, eds., Integrated assessment
|
|
of an urban water body; Santa Monica Bay, California: Marine Environmental
|
Research, v. 56, no. 1-2, p. 127-149.
|
|
|
Sommerfield, Christopher K., and Lee, Homa J., 2003, Magnitude and variability
|
|
of Holocene sediment accumulation in Santa Monica Bay, California, in Lee, Homa
|
|
J., and Weisberg, Stephen, eds., Integrated assessment of an urban water body;
|
|
Santa Monica Bay, California: Marine Environmental Research, v. 56, no. 1-2,
|
p. 151-176.
|
|
|
Alexander, Clark R., and Venherm, Claudia, 2003, Modern sedimentary processes in
|
|
the Santa Monica, California continental margin; sediment accumulation, mixing
|
|
and budget, in Lee, Homa J., and Weisberg, Stephen, eds., Integrated assessment
|
|
of an urban water body; Santa Monica Bay, California: Marine Environmental
|
Research, v. 56, no. 1-2, p. 177-204.
|
|
|
Bay, Steven M., Zeng, Eddy Y., Lorenson, Thomas D., Tran, Kim, and Alexander,
|
|
Clark R., 2003, Temporal and spatial distributions of contaminants in sediments
|
|
of Santa Monica Bay, California, in Lee, Homa J., and Weisberg, Stephen, eds.,
|
|
Integrated assessment of an urban water body; Santa Monica Bay, California:
|
Marine Environmental Research, v. 56, no. 1-2, p. 255-276.
|
|
|
Greenstein, Darrin, Bay, Steven M., Jirik, Andrew, Brown, Jeffrey, and
|
|
Alexander, Clark R., 2003, Toxicity assessment of sediment cores from Santa
|
|
Monica Bay, California, in Lee, Homa J., and Weisberg, Stephen, eds., Integrated
|
|
assessment of an urban water body; Santa Monica Bay, California: Marine
|
Environmental Research, v. 56, no. 1-2, p. 277-297.
|
|
|
Got Help?
|
For O-2-99-SC, we would appreciate any information on -- information to be derived, equipment used, information specialist, organization, ports, publications, purpose, summary.
|
|
