Subantarctic zone oceanography - SAZ Project 1997-1998 - Sediment Trap Data

Federal Geographic Data Committee (FGDC) Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Unknown

Publication_Date: Unknown

Title: Subantarctic zone oceanography - SAZ Project 1997-1998 - Sediment Trap Data

Description:

Abstract:

Oceanographic processes in the subantarctic region contribute crucially to the physical and biogeochemical aspects of the global climate system. To explore and quantify these contributions, the Antarctic Cooperative Research Centre (CRC) organised the SAZ Project, a multidisciplinary, multiship investigation carried out south of Australia in the austral summer of 1997-1998. Taken from the abstracts of the referenced papers: The SAZ project organised by the Antarctic CRC has a continuing program of moored sinking particle trap studies in the Aub-Antarctic and Polar Frontal zones southwest of Tasmania along 140 degrees E. The first deployment obtained weekly or higher resolution samples through the austral summer from September 1997 through February 1998 at three locations: the central Sub-Antarctic Zone (47 degrees S, traps at 1000, 2000 and 3800 m depth), the Sub-Antarctic Front (51 degrees S, 1 trap at 3300 m) and above the Southeast Indian Ridge in the Polar Frontal Zone (54 degrees S, 2 traps at 800 and 1500 m). The particles were analysed for total mass, inorganic carbon, total carbon, nitrogen, silicon, and aluminium. Hence values for organic carbon, biogenic silica, and lithogenics were obtained, and the mass fluxes calculated. This report details the sites, moorings, data from the current meters and sediment traps, and results of analyses performed on the collected sediment trap material. Sediment trap moorings were deployed from September 21, 1997 through February 21, 1998 at three locations south of Australia along 140 degrees E: at -47 degrees S in the central Subantarctic Zone (SAZ) with traps at 1060, 2050, and 3850 m depth, at-51 degrees S in the Subantarctic Front with one trap at 3080m, and at -54 degrees S in the Polar Front Zone(PFZ) with traps at 830 and 1580m. Particle fluxes were high at all the sites (18-32gm-2 yr-1 total mass and 0.5-1.4g organic carbon m-2 yr-1 at ~1000m, assuming minimal flux outside the sampled summer period). These values are similar to other Southern Ocean results and to the median estimated for the global ocean by Lampitt and Antia [1997], and emphasise that the Southern Ocean exports considerable carbon to the deep sea despite its "high-nutrient, low chlorophyll" characteristics. The SAZ site was dominated by carbonate (greater than 50% of total mass) and the PFZ site by biogenic silica (greater than 50% of total mass). Both sites exhibited high export in spring and late summer, with an intervening low flux period in December. For the 153 day collection period, particulate organic carbon export was somewhat higher in all the traps in the SAZ (range 0.57-0.84 gC m -L) than in the PFZ (range 0.31-0.53), with an intermediate value observed at the SAF (0.60). The fraction of surface organic carbon export (estimated from seasonal nutrient depletion, Lourey and Trull [2001]) reaching 1000 m was indistinguishable in the SAZ and PFZ, despite different algal communities.

Purpose:

Not Available

Supplemental_Information:

REFERENCE: Trull T. W., Bray S. G., Manganini S. J., Honjo S., Francois R. 2001 Moored sediment trap measurements of carbon export in the Subantarctic and Polar Frontal Zones of the Southern Ocean, south of Australia Journal of Geophysical Research 106 C12 31,489- 31,509

Supplemental_Information:

REFERENCE: Bray, S.G., Trull, T.W., Manganini, S. 2000 SAZ Project moored sediment traps: Results of the 1997-1998 deployments Antarctic CRC Research Report 15 1-128

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19970901

Ending_Date: 19980331

Currentness_Reference:Unknown

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: 141.5

East_Bounding_Coordinate: 141.5

North_Bounding_Coordinate: -42.0

South_Bounding_Coordinate: -55.0

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS

Theme_Keyword_Thesaurus: GCMD PLATFORM

Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword_Thesaurus: DATA SET LANGUAGE

Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE SEDIMENTS > SEDIMENT COMPOSITION

Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE SEDIMENTS > SEDIMENT TRANSPORT

Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE SEDIMENTS > SEDIMENTATION

Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE SEDIMENTS

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CIRCULATION > OCEAN CURRENTS

Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE SEDIMENTS > SEDIMENT CHEMISTRY

Theme_Keyword: SHIPS

Theme_Keyword: R/V AA > R/V AURORA AUSTRALIS

Theme_Keyword: Saz

Theme_Keyword: OCEANS

Theme_Keyword: ENGLISH

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: OCEAN > SOUTHERN OCEAN

Place_Keyword: GEOGRAPHIC REGION > POLAR

Access_Constraints: Copies of the referenced publications are available for download from the provided URL to AAD staff only. A large amount of data are available in the referenced publications.

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=ASAC_2256_Sediment when using these data.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: THOMAS WILLIAM TRULL

Contact_Position: INVESTIGATOR

Contact_Position: TECHNICAL CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: GPO BOX 252-80

Address: Antarctic CRC University of Tasmania

City: Hobart

State_or_Province: Tasmania

Postal_Code: 7001

Country: Australia

Contact_Voice_Telephone: +61 3 6226 2988

Contact_Facsimile_Telephone: +61 3 6226 2973

Contact_Electronic_Mail_Address: tom.trull@utas.edu.au

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

See the referenced papers for more information.

Logical_Consistency_Report:

Not Available

Completeness_Report:

Not Available

Lineage:

Process_Step:

Process_Description:

Not Available

Process_Date: Unknown

Spatial_Reference_Information:

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: AU/AADC > Australian Antarctic Data Centre, Australia

Contact_Person: DATA OFFICER AADC

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Australian Antarctic Division

Address: 203 Channel Highway

City: Kingston

State_or_Province: Tasmania

Postal_Code: 7050

Country: Australia

Contact_Voice_Telephone: +61 3 6232 3244

Contact_Facsimile_Telephone: +61 3 6232 3351

Contact_Electronic_Mail_Address: metadata@aad.gov.au

Resource_Description: ASAC_2256_Sediment

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: pdf

Transfer_Size: 24.6 MB

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://data.aad.gov.au

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://secure3.aad.gov.au/proms/public/projects/r...

Access_Instructions:

Public information for ASAC project 2256

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://data.aad.gov.au/aadc/portal/download_file.c...

Access_Instructions:

Download point for the referenced publication

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://data.aad.gov.au/aadc/metadata/citation.cfm?...

Access_Instructions:

Citation reference for this metadata record and dataset

Fees: Free

Metadata_Reference_Information:

Metadata_Date: 20120117

Metadata_Review_Date: 20120118

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: DAVE CONNELL

Contact_Position: DIF AUTHOR

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Australian Antarctic Division

Address: 203 Channel Highway

City: Kingston

State_or_Province: Tasmania

Postal_Code: 7050

Country: Australia

Contact_Voice_Telephone: +61 3 6232 3244

Contact_Facsimile_Telephone: +61 3 6232 3351

Contact_Electronic_Mail_Address: dave.connell@aad.gov.au

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time