首页|On the Horizontal Scale of Elevation Dependence of Australian Monthly Precipitation

On the Horizontal Scale of Elevation Dependence of Australian Monthly Precipitation

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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.

Climatic conditionsDaily precipitationClimatic conditionsDaily precipitationElevationInterpolationModel StudiesMonthly precipitationMonthly rainfallMountain precipitationPrecipitationRainfallTopographic effects on precipitationTopographyAustraliaSwitzerland

Sharples JJ、Hutchinson MF、Jellett DR

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Centre for Resource and Environmental Studies, Australian National Centre for Resource and Environmental Studies, Australian National University, Canberra, ACT 0200, Australia, [mailto:jasons@cres.anu.edu.au]

2005

Journal of Applied Meteorology

Journal of Applied Meteorology

SCI
ISSN：0894-8763
年,卷(期)：2005.44(12)