1. Australian Antarctic Data Centre
2. Discover and Manage Data
3. Records
4. 198384050

Description

This dataset contains the underway data collected during the MS Nella Dan Voyage V5 1983/84 (ADBEX2).

Voyage name : Antarctic Division BIOMASS Experiment II
Voyage leader: Knowles Ronald Kerry

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

A scanned copy of the Station List log, and two voyage reports are also available for download from the provided URLs.

The Nella Dan departed Hobart on 3 January with a full compliment of passengers. These included four members of the winter party and six members of the summer party for Davis, and 21 members of the winter party and three members of the summer party for Mawson. There were also 18 scientists and support staff for the ADBEX-II program. General cargo was carried for Mawson and in addition a small amount of priority cargo for Davis.

A meteorological buoy was launched at 53 degrees, 25.6 minutes S, 132 degrees, 44.0 minutes East on 7 January. The marine biology program commenced on 14 January at 63 degrees S, 73 degrees E and continued along 73 degrees E. However, after 10 hours bad weather forced the curtailment of the program and the Nella Dan made directly to Davis. The ice edge, which was just to the north of the anchorage, was reached at 1530 hours, 15 January. Personnel and cargo were discharged by LARC and barge operating to the south of Gardiner Island. The ship sailed shortly after midnight.

The marine program was commenced again on departure on the 16th of January. Five stations were taken along the track to 73 degrees E to 65 degrees S. The Nella Dan departed from there pm on 17 January and proceeded to 60 degrees E and 66.30 degrees S arriving 0200 hours on 19 January, where a sampling station was taken. Further stations were taken at 59 degrees E 66.30 degrees S and 57.46 degrees E 66.08 degrees S. The latter station was within the pack-ice. A transect was then run north along 58 degrees E to 63 degrees S and then down 60 degrees E to 66 degrees S. Finally, on 23 January, four stations were taken from there on a direct line to Mawson. The total station time amounted to two days ten hours additional steaming time four days five hours, and hove to one day six hours. The remaining time was taken up with normal steaming.

Sampling included 24 CTD casts, 22 bongo hauls, 10 RMT and 2 beam trawls. At all CTD stations water was collected for salinity oxygen and nutrient analysis. Bongo hauls were made for krill larvae and RMT hauls for krill for ageing. Reproductive studies for investigations of bioluminescence metabolic studies were made on animals collected by drift nets.

AT the conclusion of the marine program, the Nella Dan proceeded towards Mawson. The ship arrived at the edge of the pack-ice about seven miles from the station on 24 January and proceeded to work through the pack-ice. Mawson harbour was finally reached on 1 February. The discharge of cargo was carried out despite the large amount of broken ice present. This was done using the barge the Fred Bond assisted by the LARCs. Changeover of the station was completed and the ship departed on 4 February. Hobart was reached on 16 February approximately 8 days later than scheduled.

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.

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 Australian Antarctic Division Data Centre 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.

A scanned copy of the Station List log and two reports are also available for download from the provided URLs.

Temporal Coverages

• Start date: 1984-01-17 - Stop date: 1984-02-07

Spatial Coverages

57.8

89.1

-66.9

-59

+-

Leaflet

Latitude

Northernmost:

-59

Southernmost:

-66.9

Longitude

Westernmost:

57.8

Easternmost:

89.1

Science Keywords

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

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=198384050 when using these data.