CMIP5 SPI12 Drought Projections for Australia

This data contains projections of future change in Standardised Precipitation Index (SPI) defined drought and extreme drought metrics. Drought metrics include drought frequency, average drought duration, drought intensity and percent time spent in drought. The projected change represents change from the 20th century (1900-2005) to the 21st century (2006-2100). Projections are provided as the 10th, 50th and 90th percentile from a suite of 37 CMIP5 Global Climate Models (GCMs). Lineage: This data was derived from CMIP5 modelled rainfall data from 37 different GCMs. SPI is widely used to characterise drought. SPI12 is calculated by fitting a gamma distribution to each timeseries of 12-month aggregated rainfall and using this to transform/normalise the timeseries (SPI12). Further methodological description and definition of drought categories and metrics are described in Kirono et al. (2020). https://doi.org/10.1016/j.wace.2020.100280