Aurora Australis Southern Ocean oceanographic (CTD) data, cruise au9206 (FISHOG)Entry ID: au9206
Abstract: Oceanographic measurements were conducted in the Southern Ocean around Heard and McDonald Islands, and in the Prydz Bay region, from January 1992 to March 1992. A total of 168 CTD (conductivity, temperature and depth) vertical profile stations were taken, most to near bottom. Niskin bottle water samples were collected for the measurement of salinity, dissolved oxygen, nutrients (phosphate, ... nitrate+nitrite, silicate), chlorofluorocarbons, helium, tritium, dissolved inorganic carbon, alkalinity, carbon isotopes, dissolved organic carbon, dimethyl sulphide/dimethyl sulphoniopropionate, iodate/iodide, oxygen 18, primary productivity, and biological parameters, using a 24 bottle rosette sampler.
CTD salinity data have been calibrated against bottle samples, although the calibration quality vaires over the cruise. CTD salinity accuracies can be summarised as follows:
Stations 1-26: no bottle samples; conductivity calibration from later stations applied; accuracy therefore unknown.
Stations 27-102: accuracy approximately 0.005 (PSS78).
Stations 83-93: residuals a bit lower than surrounding stations: data uncertainty may be slightly increased.
Stations 103-111: no bottle samples; conductivity calibration from surrounding stations applied; accuracy therefore unknown.
Stations 112-168: significant increase in data scatter; accuracy approximately 0.010 (PSS78).
The bottle data file contains salinities and nutrients. Dissolved oxygen data exist only as titration values recorded on the laboratory analysis sheets. The nutrient data show a fair amount of scatter, particularly when looking at the nitrate vs phosphate ratios. These data should be used with caution.
Measurement and data processing techniques are described, and a summary of the data are presented in graphical and tabular form.
The fields in this dataset are:
specific volume anomaly
photosynthetically active radiation
niskin bottle number
(Click for Interactive Map)
Start Date: 1992-01-09Stop Date: 1992-03-27
OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH
OCEANS > OCEAN CHEMISTRY > ALKALINITY
OCEANS > OCEAN CHEMISTRY > AMMONIA
OCEANS > OCEAN CHEMISTRY > DISSOLVED GASES
OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON
OCEANS > OCEAN CHEMISTRY > NITRATE
OCEANS > OCEAN CHEMISTRY > NITRITE
OCEANS > OCEAN CHEMISTRY > NITROGEN
OCEANS > OCEAN CHEMISTRY > NUTRIENTS
OCEANS > OCEAN CHEMISTRY > ORGANIC CARBON
OCEANS > OCEAN CHEMISTRY > OXYGEN
OCEANS > OCEAN CHEMISTRY > PH
OCEANS > OCEAN CHEMISTRY > PHOSPHATE
OCEANS > OCEAN CHEMISTRY > PIGMENTS
OCEANS > OCEAN CHEMISTRY > SILICATE
OCEANS > OCEAN CHEMISTRY > STABLE ISOTOPES
OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE
OCEANS > SALINITY/DENSITY > CONDUCTIVITY
OCEANS > SALINITY/DENSITY > SALINITY
BIOLOGICAL CLASSIFICATION > BACTERIA/ARCHAEA
Quality See data report.
Weather conditions were generally moderate, and there were few scientific equipment failures, allowing complete coverage of the areas surveyed. The oceanography program took place in three regions; Heard Island, the eastern flank of the Kerguelen Plateau, and Prydz Bay. Each region had specific objectives, please see the reference given above for these. 61 CTD ... stations were completed in the Heard Island region, and several XBT's were dropped between widely spaced stations. A number of XBT's were deployed between Heard Island and the Kerguelen Plateau section. The CTD section consisted of 14 CTD casts to the bottom, the deepest being 4850m. XBT's were deployed between the Kerguelen Plateau section and Prydz Bay. 93 CTD stations were occupied in the Prydz Bay region. 40 XBT's were dropped in the transit from Casey to Hobart. Please see the reference given above for further details. Logically consistent, salinity and temperature are measured simultaneously under the same conditions and depths.
Access Constraints This dataset is temporarily unavailable as it is under review.
Data stored as column formatted ascii data, and matlab format; data report is MS WORD 2000 document.
Use Constraints This data set conforms to the PICCCBY Attribution License
Must be cited properly
Data Set Progress
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: +61 3 6226 7651
Fax: +61 3 6226 2973
Email: Mark.Rosenberg at aad.gov.au
ACE CRC, c/- University of Tasmania Private Bag 80
Province or State: Tasmania
Postal Code: 7001
Creation and Review Dates
DIF Creation Date: 1999-10-07
Last DIF Revision Date: 2008-04-10
Future DIF Review Date: 1999-10-07