Global Change Master Directory (GCMD)

Data Sets

Services / Tools

Ancillary Descriptions

Are you using a browser that doesn't support JavaScript or have you disabled JavaScript?

If you have disabled JavaScript, you must re-enable JavaScript to use this page.
Or you can view this record using the Text Only Format.

CEAMARC marine sediment samples

Entry ID: CEAMARC-200708_V3_MARINE_SEDIMENT_SAMPLES

[ Get Data ]
[ Update this Record ]

Summary

Abstract: Marine sediment samples were obtained from box corer, Smith-MacIntyre and Van Veen grabs.

Samples were named by:
1. CEAMARC site (e.g. 16)
2. Instrument (e.g. box corer = BC; Smith-MacIntyre = GRSM; Van Veen = GRVV) 3. Sequence of sample at each site (e.g. first sample = 01; second sample = 02) So 16BC02 is the second sample at CEAMARC site 16, using the box corer.

From each successful sample, a ...

Related URL

Link: GET DATA

Description: Download point for the data at the Australian Antarctic Data Centre

Link: GET DATA

Description: Access point for Geoscience Australia's Marine Sediments Database

Link: VIEW PROJECT HOME PAGE

Description: Public information for ASAC project 2201

Link: VIEW RELATED INFORMATION

Description: Citation reference for this metadata record and dataset.

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: -65.81

S: -67.05

E: 145.33

W: 139.33

Parent DIF

This data set description is a member of a collection. The collection is described in
ASAC_2201

Temporal Coverage

Start Date: 2007-12-23

Stop Date: 2008-01-17

Location Keywords

OCEAN > SOUTHERN OCEAN

GEOGRAPHIC REGION > POLAR

Data Resolution

Latitude Resolution: 0.0001 degree or 11.1 metres
Longitude Resolution: 0.0001 degree or 11.1 metres
Vertical Resolution: 5 metres
Temporal Resolution: 1 min

Science Keywords

OCEANS > MARINE SEDIMENTS > GEOTECHNICAL PROPERTIES

OCEANS > MARINE SEDIMENTS > SEDIMENT COMPOSITION

ISO Topic Category

GEOSCIENTIFIC INFORMATION

OCEANS

Platform

SHIPS

Instrument

GRAB SAMPLERS

SEDIMENT CORERS

GAS CHROMATOGRAPHS

MASS SPECTROMETERS

Quality Data quality is good for all sediment records.

Tin-wrapped samples are loaded into carousels with 49 samples in each tray and 3 trays making up a full run of 147 samples. The carousels are placed on an AS200 autosampler that drops a sample in response to a pulse of compressed air. Gases are swept through the columns and GC by an approximately 100 ml min-1 flow of high purity ... helium. The sample dropper uses a sliding port that maintains the approximately 1 atmosphere pressure of the helium required to force the gases through the columns and GC.
The autosampler sits on top of a Carlo Erba CE1110 CHN-S analyser containing the two furnaces, the scrubber and the GC (Gas Chromatograph). After the GC in the gas stream sits a TCD (Thermal Conductivity Detector) which is used to measure peak area when the machine is used as an elemental analyser. The samples are dropped into the left-hand furnace which is the oxidising furnace and is maintained at 1050 degrees C. It consists of a silica glass tube filled with chromium oxide to the midpoint, with cobaltous silver oxide under it. A tube takes the carrier gas from the bottom of this reactor to the second, reducing furnace tube which the mixed gases flow up through. The second silica glass tube is filled with metallic copper pellets and is kept at 660 degrees C. The gases flow out of the top of this tube and through a scrubber filled with magnesium perchlorate to absorb all water vapour. The dried gases then pass through a packed GC consisting of a 1/4" stainless steel tube with Porapak QS 50-80 mesh. This is held at about 25 degrees C. Nitrogen gas exits from the GC, followed by carbon dioxide after about one minute. These flow to an open split where they are sucked into the mass spectrometer through a 75 micro silica capillary.
The gas pulses, still mixed with the helium carrier, flow into the Fisons Isochrom CF-IRMS (Continuous-flow Isotope Ratio Mass Spectrometer) where their isotopic compositions are determined.

Surface sediment samples were analysed to determine the gravel, sand and mud content by washing through 2 mm and 63 micron sieves. The less than 2 mm fraction was also analysed for laser particle size. Carbonate content was determined on the bulk material as well as the mud and sand fractions using the carbonate bomb method (Muller and Gastner, 1971). The carbonate content of the gravel fraction was determined by visual analysis. The biogenic silica content of the bulk sediment was measured based on the method of Mortlock and Froelich (1989). Muller, G., Gastner, M., 1971. The "Karbonat-Bombe," a simple device for the determination of the carbonate content in sediments, soils and other materials. Neues Jahrbuch fur Mineralogie, Monatshefte 10, 466-469. Mortlock, R.A., Froelich, P.N., 1989. A simple method for the rapid determination of biogenic opal in pelagic marine sediments. Deep Sea Research 36, 1415-1426.

Access Constraints These data are publicly available for download from the provided URLs. Contact the investigators for permission to use the data.

The dataset contains two excel spreadsheets detailing the sediment isotopes and the grainsize compositions, plus a pdf which provides further information about the laser grainsize data.

Furthermore a link to Geoscience Australia's Marine Sediments Database is included. Data can also be found here.

Use Constraints This data set conforms to the PICCCBY Attribution License
(http://creativecommons.org/licenses/by/3.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=CEAMARC-... when using these data.

Ancillary Keywords

sediment samples

surface sediment

Data Set Progress

COMPLETE

Data Center

Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Data Center URL: http://disc.gsfc.nasa.gov/

Data Center Personnel
Name: GES DISC HELP DESK SUPPORT GROUP Phone: 301-614-5224 Fax: 301-614-5268 Email: gsfc-help-disc at lists.nasa.gov Contact Address: Goddard Earth Sciences Data and Information Services Center Code 610.2 NASA Goddard Space Flight Center City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA

Distribution

Distribution Media: FTP/HTTP

Distribution Size: 120 MB

Distribution Format: ASCII

Fees: Free

Personnel

PAWAN K BHARTIA, PH. D

Role: INVESTIGATOR

Phone: 301-614-5731

Fax: 301-614-5903

Email: Pawan.K.Bhartia at nasa.gov

Contact Address:

NASA

Goddard Space Flight Center

Mailstop 613.3

City: Greenbelt

Province or State: MD

Postal Code: 20771

Country: USA

Publications/References

Eck, T. F., Bhartia, P. K., Kerr, J. B., Satellite estimation of spectral UVB irradiance using TOMS derived total ozone and UV reflectivity, Geophy. Res. Letters 1995, 22, 611-614

Herman, J.R., et al., "Meteor-3 Total Ozone Mapping Spectrometer (TOMS) Data Products User's Guide." NASA reference publication 1393, 1996.

McPeters, R.D., et al., "Earth-Probe Total Ozone ...

Extended Metadata Properties

(Click to view more)

Creation and Review Dates

DIF Creation Date: 2011-02-23

Last DIF Revision Date: 2012-12-13

Reformat as FGDC document

View Text Only Format

[ Update this Record ]