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(Article of periodic en Anglais - 2009)

Document title

Inter-annual rainfall variability of arid Australia : greater than elsewhere ?

Authors(s) and Affiliation(s)

VAN ETTEN E.J.B. (1) ;
(1) Edith Cowan Univ., AUSTRALIE

Abstract

The view that Australia's arid zone experiences more variable rainfall over time than areas of similar climates elsewhere was tested using annual rainfall data from 407 localities spread throughout 14 arid areas, including 68 Australian sites. This represnts an updated and more comprehensive analysis than previously completed. Four measures of inter-annual rainfall variability were calculated : the variability index (spread of the 90th and 10th percentiles divided by the median rainfall) and the coefficient of variability (standard deviation as a percentage of the mean) and in addition two simpler measures not divided by the average annual rainfall : the difference between the 90th and 10th percentiles, and the standard deviation of the mean. Linear relationships between rainfall variability and average annual rainfall enabled analysis of covariance (ANCOVA) to be employed. The findings suggest that comparative studies of biotic responses to rainfall variability between arid Australia (particular southern regions) and other deserts are warranted before paradigms and models based on the uniqueness of Australia's arid environment are accepted

Source

Article of periodic

published at : Australian Geographer / ISSN 0004-9182

Editor : Geographical Society of New South Wales, Sydney - AUSTRALIE (1928)

Millesime : 2009, vol. 40, no1 [pp. 109-120]

Bibliographic references : 1,5 p.

Collation : 2 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 3519

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1080/00049180802657075

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2009
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