ANUClimate 1.0 model

Tmax_Tmin_1970_and_2010

FACT BOX
SOFTWARE PACKAGE ANUClimate 1.0
DEVELOPERS Michael Hutchinson (Australian National University)
APPLICATION Interpolate Australia’s national point climate data to produce climate variables on a 0.01° grid.
APPLICATION in eMAST Generation of a number daily and monthly climate indices for the Australian continent.

ANUClimate 1.0 is a spatial model developed by Michael Hutchinson that integrates a new approach to the interpolation of Australia’s national point climate data to produce climate variables on a 0.01° grid.

The available high-resolution climate data sets span the period from January 1970 to December 2013. ANUClimate 1.0 incorporates several new features such as improved background-anomaly interpretation and a new “proximity to coast” modifier, which captures the marine perturbation of daily minimum and maximum temperature. This means that temperature and both positive and zero rainfall can be effectively interpolated by the thin plate spines method, which has adaptive capacities. Therefore, monthly mean are topographically corrected and yield influence of atmospheric processes and terrain.

Monthly temperature estimates are improved by around 25% and precipitation estimates by 7-15% compared to Jones et al. (2009) RMSE cross-validation. However, the model makes no further improvement on accuracy below the 1km resolution.

The model includes two Digital Elevation Models with differing spatial complexity derived from GEODATA9 second DEM version 3 to support modelling of surface climate and related earth surface processes for the Australian continent.