- Title
- Temporal changes in annual rainfall in the 'Top End' of Australia
- Creator
- Erskine, Wayne D.; Saynor, Michael J.; Townley-Jones, Maureen E.
- Relation
- Symposium J-H02, held during 25th International Union of Geodesy and Geophysics (IUGG) General Assembly (IUGG2011). Hydro-climatology: Variability and Change, IAHS Series of Proceedings and Reports 344 (Melbourne, Vic. 28 June - 7 July, 2011) p. 57-62
- Publisher
- IAHS Press
- Resource Type
- conference paper
- Date
- 2011
- Description
- CUSUM (cumulative deviations from the mean) analysis of up to 136 years of annual rainfall at 15 stations in the northern part of the Northern Territory (Australia) revealed alternating periods of above- and below-average rainfall that persisted for at least 6 years to many decades. The Kruskal-Wallis and Mann Whitney tests were used to show that consecutive time periods were usually statistically significantly different to each other. Furthermore, the wet periods were statistically identical to each other, as were the dry periods, but non-consecutive wet and dry periods were significantly different. The time and duration of these alternating wet and dry periods varied from station to station. Alternating, sub-decadal to multi-decadal, wet and dry periods also appear to be manifested in the streamflow record and have significant implications for water resource assessments, river channel dynamics and landscape processes.
- Subject
- alternating flood- and drought-dominated regimes; CUSUM; non-parametric statistics; Top End of Australia
- Identifier
- http://hdl.handle.net/1959.13/1325535
- Identifier
- uon:25291
- Identifier
- ISBN:9781907161193
- Identifier
- ISSN:0144-7815
- Language
- eng
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