1. Australian Antarctic Data Centre
2. Discover and Manage Data
3. Records
4. 200708060

Description

This dataset contains the underway data collected during the Aurora Australis Voyage V6 2007/08.

Voyage Objectives : CASO marine science
Leader: Dr. Steve Rintoul
Deputy Leader: Mr. Andrew Deep

Undertake marine science as part of the CASO program.

Underway (meteorological) data are available online via the Australian Antarctic Division Data Centre web page (or via the Related URL section).

From the voyage leader's report:

Aurora Australis left Hobart on March 22, 2008. The vessel transited to the southern end of the WOCE/CLIVAAR SR3 transect, along nominally 140E. On the way south, the continuous plankton recorder (CPR) was deployed and several test casts were carried out.

We reached the edge of the sea ice at 64 40'S, over the continental slope (water depth of 3000 m), about 6 days after leaving Hobart. We were able to make good progress through rapidly growing first year ice and reached the southernmost station on March 28, in 300 m of water over the continental shelf. We parked in the less of some grounded icebergs to wait for strong winds to abate overnight. The winds dropped off just when we needed them to, and we were able to complete all 9 stations in the sea ice. The lack of wind meant that we could comfortably do deep CTD stations in small holes, either in the lee of icebergs or cut by steaming the ship in small circles. If there had been any wind, it would have been very difficult to complete the southern stations. Having experienced ice pilots on the bridge helped us complete the work in the sea ice very efficiently.

We then worked out way north along the transect. The weather continued to be remarkably good. We only lost time to weather once, when winds peaked at over 60 knots and we lost a total of about 36 hours. Otherwise, the section was completed with few problems. The observations collected during the voyage are summarised below. We finished the transect on the evening of March 15 without missing a station and returned to Hobart on March 17, two days early.

We completed all the voyage objectives as well as a few additional stations, including trace metal sampling near an iceberg using both the trace metal rosette and the Fast Rescue Craft (FRC).

Quality

The data have been acquired at 0.1 Hz. There will be the occasional invalid value such as temperatures being out of range.

This dataset has not been checked. Please verify the data before use.

See the Marine Science Support Data Quality and Programmer's Reports at the Related URL section.

Where data for a particular sensor do not exist for a particular time, the last known value is used unless the sensor has been disabled or has encountered an error. For example, some sensors only record data every minute, but the resolution for the underway dataset is 10 seconds, so the same value will be used 6 times a minute. No averages are taken for sensors that capture data at a rate other than every 10 seconds. Instead, each record will be a snapshot of each sensor at that time.

Access

Data are available online via the AADC web page. A "supplementary" dataset is also available for download from the provided URL. It contains raw data collected directly from the ship, which has not been quality checked.

Reports from the voyage are also available for download.

Temporal Coverages

• Start date: 2008-03-22 - Stop date: 2008-04-19

Spatial Coverages

Science Keywords

• EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > SEA LEVEL PRESSURE
• EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE > AIR TEMPERATURE
• EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR INDICATORS > HUMIDITY
• EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > WIND DYNAMICS > CONVECTION
• EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > SOLAR RADIATION

Use Constraints

This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=200708060 when using these data.