|Title||Tropical cyclone gridded datasets|
|Custodian||Bureau of Meteorology|
|Abstract||The grids show the average annual number of tropical cyclones over the Australian region in the form of two-dimensional array data.
The data are based on the period 1969/70 to 2005/06.
See LINEAGE below for more information.
|Search Word(s)||Gridded, analyses, tropical, cyclone, meteorology|
|Geographic Extent Names(s)||Australia|
|General Category||Gridded neutral, La Nina, El Nino and all years annual data|
|General Custodian Jurisdiction||Australian Government
|Geographic Extent Polygon||Not applicable|
|Geographic Bounding Box||See below|
|North Bounding Latitude||0.00|
|South Bounding Latitude||-60.00|
|East Bounding Longitude||250.00|
|West Bounding Longitude||30.00|
|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.|
|Lineage||The southern hemisphere tropical cyclone (TC) archive consists of cyclone best track data for the TC seasons from 1969/70 to 2005/06. The creation of a reasonably complete 30-year dataset for the whole Southern Hemisphere provided the basis for the generation of a set of climatological data sets showing the frequency of TC occurrence.
A number of quality control/validation procedures were applied as part of the TC archive generation process. For example, the data was cross-checked with TC archive data from the Joint Typhoon Warning Centre, Hawaii, USA. We believe that the 1969/70 to 2005/06 TC archive accurately represents cyclone best track data in the Southern Hemisphere.
For the 30-year period corresponding to the 1969/70 to 2005/06 TC seasons, cyclone tracks were analysed across the southern hemisphere at a resolution of 2° x 2°. The number of occurrences of cyclones in each 2°x2° square was then calculated and the data converted to two-dimensional gridded format.
The derived gridded information shows the average annual occurrence of tropical cyclones as well as the average annual cyclone occurrence during El Niño, La Niña and neutral years. Note, El Niño, La Niña years were taken from Wright (2001).
The calculation of cyclone occurrence in this study was similar to the analysis done by Lourensz (1981) which was based on 5° lat/long squares. However, these gridded data sets show annual occurrence rather than decadal incidence information, and a finer rectangular resolution was used in this analysis (2° lat/long squares).
Lourensz, R.S. 1981. Tropical cyclones in the Australian region July 1909 to June 1980. Australian Government Publishing Service, Canberra, 94 pp.
Wright, W.J, 2001: A review of Australian climate in the 20th Century. Preprints, CLI-MANAGE 2000 (Conference on Managing Australian Climate Variability), Albury, NSW, Australia, Bureau of Meteorology, 127-130.
|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 Organisation||Bureau of Meteorology|
|Contact Position||Climate Data Services|
|Mail Address||PO BOX 1289, Melbourne 3001, Australia|
|Telephone||(03) 9669 4082|
|Facsimile||(03) 9669 4515|
|Additional Metadata||Additional information available on request (see contact above).|