Gridded seasonal rainfall zone metadata


Title Seasonal rainfall classification (base climate related classification datasets)


Custodian Bureau of Meteorology
Jurisdiction Australia


Abstract The grids shows the seasonal rainfall classification indicies across Australia in the form of two-dimensional array data. 
The classification is based on 100 year period (1900-1999). 
See LINEAGE below for more information.
Search Word(s) Gridded, spline, analyses, climatology, rainfall, seasonal, classification, meteorology
Geographic Extent Names(s) Australia
General Category Gridded climatological data
General Custodian Jurisdiction Australian Government
Geographic Extent Polygon Not applicable
Geographic Bounding Box See below
North Bounding Latitude -9.875
South Bounding Latitude -44.625
East Bounding Longitude 156.375
West Bounding Longitude 111.875

Data Currency

Beginning Date 1900
Ending Date 1999

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 classification was based on median annual rainfall (November to April, May to October and seasonal incidence). 
The seasonal incidence is determined from the ratio of median rainfall for periods, November to April / May to October and May to October / November to April. 

For more information see: Gaffney.D.O. 1971, Seasonal rainfall Zones in Australia, Bureau of Meteorology, Working paper No 141. 

The base median rainfall gridded data were generated using the Barnes two-dimensional analysis. The grid resolution of the data is 0.25 degrees (approximately 25km). 

Grid-point indices on the classification grid are as follows: 

Summer dominant 
1 summer dominant (more than 1200) 
2 summer dominant (650 - 1200) 
3 summer dominant (350 - 650) 
4 arid (less than 350) 
5 summer (more than 1200) 
6 summer (650 - 1200) 
7 summer (350 - 650) 
8 uniform (more than 800) 
9 uniform (500 -800) 
10 uniform (250 500) 
Winter dominant 
11 winter dominant (more than 800) 
12 winter dominant (500 800) 
13 winter dominant (250 500) 
14 winter (more than 800) 
15 winter (500 800) 
16 winter (250 500) 
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 Grid point data are post processed. 
For more information (metadata) on observing stations please contact us.
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 2006
Additional Metadata Additional information available on request (see contact above).
Page updated: 3 October 2011