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Brief description
Salinity data collected on the Australian shelf between 1995 to 2014 have been assembled into a single data collection. Profiles, trajectories and timeseries datasets within the 500m depth contour and collected by different organisations have been included. A full list of datasets used to produce this collection is provided below: * The Integrated Marine Observing System (IMOS): - Seals CTD profiles - Argo profiles - Glider deployments - CTD Casts performed at National Reference Station - Moorings - AUV deployments - Sensor networks in the Great Barrier Reef - Ship underway * Royal Australian Navy (RAN): - Sea Surface Temperature measurements on NSW coast * The Australian Institute of Marine Science (AIMS): - CTD casts * Defence Science and Technology Organisation: - Glider deployments * Charles Darwin University – Xavier Hoenner: - Hawksbill Turtles * CSIRO Ocean and Atmosphere: - Moorings - Trajectory - Underway * World Ocean Database 2013 (WOD) – standard depth data products: - XBT profiles (XBT) - CTD casts (CTD) - Surface only data (SUR) - Undulating Oceano Recorder (UOR) Salinity measurements from the different sources have been assembled into a common data structure in a relational database. Quality Control flags have been mapped to a common scheme and associated to each measurements. Around 25 Million measurements are available in this dataset collection. Datasets like gliders, moorings or ship underway are sampled at high resolution (e.g.: data every seconds). A sub-sampling approach has been applied to some of these datasets in order to reduce the number of measurements. For example, ship underway data have been averaged over a period of 1 minute and sub-sampled every 5 minutes. Hourly average have been performed on most of the moorings timeseries. Various quality control checks have been performed on the dataset. A full list of quality control checks is available in the Lineage section of the metadata records. A national shelf and coastal data atlas has been created using all the salinity measurements. The observations have been binned on an horizontal grid of ¼ degree with standard vertical levels (every 10 meters from the surface to -500m). Moreover, a monthly time range have been used over the period January 1995 to December 2014. The number of observations in each grid square has been determined and additional statistics have been calculated like the mean, the standard deviation, the minimum and maximum values for each grid square. Two WFS services have been created to publish the individual observations, and the statistics, used to produce the data atlas.Lineage
Maintenance and Update Frequency: asNeeded
Statement: Data from different sources (sometimes pre-averaged and sub-sampled over 1 hour or 5 minutes for high frequency sources) have been binned temporally and spatially to create this data atlas. The temporal bin size is a month while the geographic bin dimensions are 0.25 degrees both in latitude and longitude, and the depth bin size is 10 metres. Within each 4D bin, only data with a flag 0 (except FAIMMS), 1 and 2, and which values pass the QC tests are considered to compute an average, standard deviation, minimum and maximum and the number of samples considered. The QC tests applied are an impossible time test (time must be between 01-01-1995 and now), impossible location test (latitude must be between -45 and -3, and longitude must be between 111 and 155), impossible depth test (nominal depth or depth must be between -5 and 505) and a global range test (temperature must be between -2.5 and 40 while salinity must be between 2 and 41). Finally, any data which depth is greater than the Geoscience Australia bathymetry sub-sampled at 1km resolution + 10m fails a bathymetry test.
A document describing in more detail the processing steps is available on the following IMOS portal help page (http://help.aodn.org.au/help/?q=node/91 ).
Notes
CreditWorld Ocean Database (WOD)
Credit
Australia’s Integrated Marine Observing System (IMOS) is enabled by the National Collaborative Research Infrastructure Strategy (NCRIS). It is operated by a consortium of institutions as an unincorporated joint venture, with the University of Tasmania as Lead Agent.
Australia’s Integrated Marine Observing System (IMOS) is enabled by the National Collaborative Research Infrastructure Strategy (NCRIS). It is operated by a consortium of institutions as an unincorporated joint venture, with the University of Tasmania as Lead Agent.
Created: 28 05 2015
Subjects
Buoys | Moored Buoys |
Countries | Australia |
Countries | Indonesia |
EARTH SCIENCE |
Global / Oceans | Indian Ocean |
Global / Oceans | Pacific Ocean |
Marine Features (Australia) | Great Australian Bight, SA/WA |
Marine Features (Australia) | Great Barrier Reef, QLD |
Marine Features (Australia) | Kimberley Coast, WA |
Marine Features (Australia) | Ningaloo Marine Park, WA |
Marine Features (Australia) | Pilbara Coast, WA |
OCEANS |
Practical salinity of the water body |
Regional Seas | Coral Sea |
Regional Seas | Tasman Sea |
Regional Seas | Timor Sea |
Salinity |
SALINITY/DENSITY |
States, Territories (Australia) | New South Wales |
States, Territories (Australia) | Northern Territory |
States, Territories (Australia) | Queensland |
States, Territories (Australia) | South Australia |
States, Territories (Australia) | Tasmania |
States, Territories (Australia) | Victoria |
States, Territories (Australia) | Western Australia |
oceans |
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Other Information
(World Ocean Database)
uri :
https://www.nodc.noaa.gov/OC5/WOD/pr_wod.html
(OGC WFS help documentation)
Identifiers
- global : 0a21e0b9-8acb-4dc2-8c82-57c3ea94dd85
