Gridded potential frost days metadata


Title Mean monthly and mean annual days with minimum temperature less than a given threshold (base climatological data sets)


Custodian Bureau of Meteorology
Jurisdiction Australia


Abstract The grids show the number of days with minimum temperature less than a given threshold. This is referred to as frost potential. The data extends across Australia and is in the form of two-dimensional array data. The indices are based on the period 1976 to 2005. 
See LINEAGE below for more information.
Search Word(s) Gridded, analyses, temperature, frost, meteorology
Geographic Extent Names(s) Australia
General Category Gridded monthly and annual data
General Custodian Jurisdiction Australian Government
Geographic Extent Polygon Not applicable
Geographic Bounding Box See below
North Bounding Latitude -9.975
South Bounding Latitude -44.525
East Bounding Longitude 156.275
West Bounding Longitude 111.975

Data Currency

Beginning Date 1976
Ending Date 2005

Dataset Status

Progress Completed
Maintenance and
Update frequency


Stored Data Format Arc/InfoTM grids - all Australia
Available Format Type ASCII grid-point, Arc/InfoTM grid Interchange (.e00),Shapefiles.
Access Constraint Please note that the copyright for any data supplied by the Bureau of Meteorology is held in the Commonwealth of Australia and the purchaser shall give acknowledgement of the source in reference to the data. Apart from dealings under the Copyright Act 1968, the purchaser shall not reproduce (electronically or otherwise), modify or supply (by sale or otherwise) these data without written permission from the supplier.  Please contact us (see details below) for more information.

Data Quality

Lineage The analyses (grids) are computer generated using a sophisticated analysis technique. It incorporates an optimised Barnes successive correction technique that applies a weighted averaging process to the station data. Topographical information is included by the use of anomalies (departures from average) in the analysis process.
On the maps each grid-point represents an approximately square area with sides of about 5 kilometres (0.05 degrees). The size of the grids is limited by the data density across Australia.
This grid-point analysis technique provides an objective average for each grid square and enables useful estimates in data-sparse areas such as central Australia. However, in data-rich areas such as southeast Australia or in regions with strong gradients, "data smoothing" will occur resulting in grid-point values that may differ slightly from the exact minimum temperatures measured at the contributing stations. 
Positional Accuracy The observational (station) data on which the analyses were based have an associated accuracy of the order of 0.01 degrees (approximately 1km) or better.
Attribute Accuracy Not applicable
Logical Consistency Not applicable
Completeness No missing data

Contact Information

Contact Organisation Bureau of Meteorology
Contact Position Climate Data Services
Mail Address PO BOX 1289, Melbourne 3001, Australia
State Victoria
Country Australia
Postcode 3001
Telephone (03) 9669 4082
Facsimile (03) 9669 4515
Electronic Mail

Metadata date

Metadata date 2008
Additional Metadata Additional information available on request (see contact above).
Page updated: 3 October 2011