CTD data from cruise ta0803 of the RV Tangaroa

This is the CTD data set from RV Tangaroa cruise tan0803, 26th March to 26th April 2008, along the Macquarie Ridge. This was the recovery cruise for the Macquarie Ridge mooring array.

The primary aims of the oceanographic program were:

1. recovery of a New Zealand/Australia collaborative mooring array spanning two gaps in the Macquarie Ridge north of Macquarie Island, and

2. occupation of a CTD transect running south from New Zealand to 60o S along the Macquarie Ridge.

Eight of the nine moorings were successfully recovered. The mooring at site number 3 (NIWA gear) was unrecoverable, with acoustic release communication indicating only the bottom portion of the mooring remaining and lying flat on the ocean floor. Complete details of the mooring work are included in a separate mooring recovery report. Mooring instruments were downloaded on the ship, with a very high percentage of successful data recording. Ship maneouvering and deck operations all went well throughout the recoveries. Shiptime at the mooring locations was well spent, with daylight hours dedicated to mooring recovery, and night time used for nearby CTD, swath mapping, coring and sea mount activities, and for unspooling of mooring line. The additional container space created on the top deck portside (above the trawldeck) proved extremely valuable for stowage of mooring gear.

58 CTD's were completed during the cruise, including 54 along the main transect, and 4 at coring locations (part of the geology program). Main transect CTD's included 2 across the northern mooring group, and 3 across the southern mooring group. Most casts were to within 25 metres of the bottom. Instrument problems resulted in incomplete casts at the following locations: CTD 9, CTD 11 and CTD 27. CTD 46 was skipped due to bad weather, while further instrument problems prevented a cast at the southernmost site (CTD 50). Niskin bottles were sampled at each station for dissolved oxygen and salinity, with a subset of stations selected for 18O sampling. Some stations were additionally sampled for DIC, alkalinity, 13C, silicate, and U/Th, as part of the geology program.

Note that dissolved oxygen data have been removed from this data set, as oxygen bottle samples were never analysed.

Identification info

Alternate title: CTD data from cruise ta0803 of the RV Tangaroa

Date (Publication): 2019-05-15

Edition: 1

Citation identifier

Dataset DOI

Title: Information and documentation - Digital object identifier system

Date (Publication): 2012-04-23

Citation identifier: ISO 26324:2012

Citation identifier: doi:10.26179/5ce4a15280696

Originator

Williams, M., Rintoul, S. and Rosenberg, M.

Publisher

Australian Antarctic Data Centre

Principal investigator

WILLIAMS, MICHAEL

NIWA

Private Bag 14901

Wellington

6021

New Zealand

+64 4 386 0389

+64 4 386 2153 (facsimile)

Principal investigator

RINTOUL, STEVE

CSIRO Marine and Atmospheric Research

GPO BOX 1538

Hobart

7001

Australia

+61 3 6232 5393

+61 3 6232 5123 (facsimile)

Collaborator

WILLIAMS, MICHAEL

NIWA

Private Bag 14901

Wellington

6021

New Zealand

+64 4 386 0389

+64 4 386 2153 (facsimile)

Collaborator

ROSENBERG, MARK

ACE CRC

c/- University of Tasmania

Private Bag 80

Hobart

7001

Australia

+61 3 6226 7651

+61 3 6226 2973 (facsimile)

Name: CAASM Metadata

Website: https://data.aad.gov.au/metadata/records/ta0803

Status: Completed

Custodian

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)

Australian Antarctic Division

203 Channel Highway

Kingston

Tasmania

7050

Australia

+61 3 6232 3244

+61 3 6232 3351 (facsimile)

Topic category

Oceans

Extent

Description: Temporal Coverage

Temporal extent

TimePeriod: 2008-03-26 2008-04-26

Extent

Description: Vertical Extent - Depth

Vertical element

Minimum value: 0

Maximum value: 4950

Identifier: urn:x-ogc:def:cs:EPSG:6498

Name: Vertical CS. Axis: depth (D). Orientation: down. UoM: m.

Identifier: urn:x-ogc:def:axis:EPSG:113

Name: depth