The Bureau of Meteorology Statistical Downscaling Model Graphical User Interface: user manual and software documentation

The Bureau of Meteorology Statistical Downscaling Model Graphical User Interface: user manual and software documentation Report

CAWCR Technical Report No. 004

  • Author(s): Timbal, B., Li, Z., Fernandez, E.
  • Published: 2008

Abstract: Climate change information required for impact studies is of a much finer spatial scale than climate models can directly provide. Statistical downscaling models (SDMs) are commonly used to fill this scale gap. SDMs are based on the view that the regional climate is conditioned by two factors: (1) the large scale climatic state and (2) local physiographic features. A SDM based on an analogue approach has been developed within the Australian Bureau of Meteorology and applied to ten regions covering the entire Australian continent. Six surface predictands (daily minimum and maximum temperatures, dew-point minimum and maximum temperatures, total rainfall and pan evaporation) were modelled. The skill of the SDMs was evaluated by comparing reconstructed and observed series using a range of metrics: the first two moments of the series, and the ability to reproduce day-to-day variability, inter-annual variability, and long-term trends. Once optimized, the SDMs were applied to a selection of global climate models which contributed to the Intergovernmental Panel on Climate Change 4th assessment report released in 2007. A user-friendly graphical interface has been developed to facilitate dissemination of the SDM results and provides a range of options for users to obtain tailored information. Once the projections are calculated for the places of interest, graphical outputs are displayed. These can be downloaded jointly with the underlying data, allowing users to manipulate the data in their own applications. This document provides the user with both a description of the SDM and a user manual of the Graphical User Interface (GUI). The first part describes the scientific background: the objectives of downscaling and how the BoM SDM was developed, as well as the predictands obtained, how the model was optimised and evaluated and the global climate models used for projections. The second part is a comprehensive documentation of the GUI: its structure, usage and the results provided. The appendices provide more details about the optimised parameters of the model, its skill, the GUI Perl scripts and directory structure, the SDM structure and routines, and the graphical outputs of the GUI. The last appendix illustrates the benefits of the SDM via two case studies: projected maximum temperature in Mildura and sub-grid heterogeneity.

Cite this document

Suggested Citation
Timbal, B., Li, Z., Fernandez, E. , 2008, The Bureau of Meteorology Statistical Downscaling Model Graphical User Interface: user manual and software documentation, Report, viewed 12 June 2024, https://www.nintione.com.au/?p=5118.

Endnote Mendeley Zotero Export Google Scholar

Share this page

Search again