On the Horizontal Scale of Elevation Dependence of Australian Monthly Precipitation

Date

2005

Authors

Sharples, Jade
Hutchinson, Michael
Jellett, Damian

Journal Title

Journal ISSN

Volume Title

Publisher

American Meteorological Society

Abstract

Determination of the scale of the interaction between precipitation and topography is important for the accurate interpolation of rainfall in mountainous areas and also provides insight into the physical processes involved. In this paper, trivariate thin-plate smoothing splines are used to investigate the scale of interaction between monthly precipitation and topography by interpolating monthly rainfall over three subregions of the Australian continent, incorporating different climatic conditions and rainfall types. The interpolations are based upon elevations derived from digital elevation models (DEMs) of various resolutions. All of the DEMs are local averages of version 2.0 of the 9-s-resolution DEM of Australia. The results suggest that the optimal scale of the interaction between precipitation and topography, as it pertains to the elevation-dependent interpolation of monthly precipitation in Australia, is between 5 and 10 km. This is in agreement with results of similar studies that addressed daily precipitation over Switzerland.

Description

Keywords

Keywords: Interpolation; Mathematical models; Physical properties; Precipitation (meteorology); Surface topography; Seasonal precipitation response; Smoothing spline methodology; Meteorology; precipitation (climatology); regional climate; topography; Australasia; A

Citation

Source

Journal of Applied Meteorology

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1175/JAM2289.1

Restricted until

2037-12-31