Sea Salinity in the Australian Region
Salinity, linearly interpolated from CARS2000 mean and seasonal fields to 0.1 degree spaced grid, at depths of 0, 150, 500, 1000 and 2000 metres. The loess filter used to create CARS2000 resolves at each point a mean value and a sinusoid with 1 year period (and in some cases a 6 month period sinusoid - the "semi-annual cycle".) The provided "annual amplitude" is simply the magnitude of that annual sinusoid. CARS is a set of seasonal maps of temperature, salinity, dissolved oxygen, nitrate, phosphate and silicate, generated using Loess mapping from all available oceanographic data in the region. It covers the region 100-200E, 50-0S, on a 0.5 degree grid, and on 56 standard depth levels. Higher resolution versions are also available for the Australian continental shelf. The data was obtained from the World Ocean Atlas 98 and CSIRO Marine and NIWA archives. It was designed to improve on the Levitus WOA98 Atlas, in the Australian region.
Simple
Identification info
- Date
- Citation identifier
- Marlin Record Number: 8193
- Citation identifier
- Anzlic Identifier: ANZCW1205000810
- Status
- Completed
- Point of contact
-
Role Organisation Electronic mail address Point of contact CSIRO Oceans & Atmosphere - Hobart
- Topic category
-
- Oceans
Extent
))
Temporal extent
- Time period
- 1900 2000
- Title
-
Dunn, J.R. and Ridgway, K.R., Mapping ocean properties in regions of complex topography, Deep Sea Research Part I : Oceanographic Research, 49 (3) (2002) pp. 591-604
- Date (Publication)
- 2002
- Title
-
Ridgway K. R., J. R. Dunn and J. L. Wilkin, Ocean interpolation by four-dimensional least squares -Application to the waters around Australia, J. Atmos. Ocean. Tech., Vol 19, No 9, 1357-1375, 2002.
- Date (Publication)
- 2002
- Maintenance and update frequency
- Not planned
- GCMD Keywords
- AODN Geographic Extent Names
Resource constraints
- Other constraints
-
Released to CSIRO Marine Research by permission of the originator custodian. May be released to external research bodies, please discuss with Data Contact.
- Language
- English
- Character encoding
- UTF8
- Supplemental Information
-
ATTRIBUTE STATEMENT:
X & Y grid spacing (grid space), number of grid points in Y & X directions (ngridpts), Grid origin in lat-lon space (gr_origin), Rotation of grid about origin (rotation), Grid polygon corners in lat-lon space (corners), Mapping details (map_details), mean (mean), amplitude of annual harmonics (annual_amplitude) .CARS2000 is derived from ocean cast data, which is always measured above the seafloor. However, for properties which do not change rapidly near the seafloor, this would not lead to a significant error. All the limitations of CARS2000 also apply here.
Distribution Information
- Distribution format
-
-
DIGITAL - netCDF
-
- OnLine resource
-
Data Link
salinity_10thdeg.nc.gz (30.2 MB)
Data quality info
- Hierarchy level
- Dataset
Report
Result
- Date (Publication)
- Explanation
-
Errors may occur in location of cast data, which especially arises when data is passed from originator to accumulator organisations. For example, 1100 WOA94 casts were rejected prior to mapping due to being landward of the GEBCO coastline. The grid spacing is much finer than the length scales of mapping/interpolation, so there is no problem with positional accuracy.
Report
Result
- Date (Publication)
- Explanation
-
Accuracy is less than that of the corresponding CARS2000 fields by a small but undefinable degree.
Report
Result
- Date (Publication)
- Explanation
-
Points were generated by locally weighted filtering of measurements over a large domain, so there is a high degree of coherence and consistency between adjacent gridded values. [CARS200]"Mapping was optimised to accurately locate horizontal structure and mean values in mapped properties, and to reveal annual and semi-annual signals. Depth layers were only loosely related to adjacent layers, and spatial mapping scales varied between layers. The mapping methods therefore were NOT optimised to resolve vertical structure."
Report
Result
- Date (Publication)
- Explanation
-
Complete
Resource lineage
- Statement
-
Derived from CARS2000
- Hierarchy level
- Dataset
Metadata
- Metadata identifier
- 3964f50d-c9e3-40c3-90c9-516fb0f9d7c3
- Language
- English
- Character encoding
- UTF8
- Contact
-
Role Organisation Electronic mail address Point of contact CSIRO Oceans & Atmosphere - Hobart
- Metadata linkage
-
Point of truth URL of this metadata record
Point of truth URL of this metadata record
- Date info (Creation)
- 2008-07-07T00:00:00
- Date info (Revision)
- 2008-07-07T14:47:40
Metadata standard
- Title
-
ISO 19115-3:2018
- Title
-
Marine Community Profile
- Date (Creation)
- 2019-05-30
- Edition
-
3.0
- Edition date
- 2019-05-30T00:00:00
- Cited responsible party
-
Role Organisation Electronic mail address Custodian Marine Community Profile Governance Committee
)))