71.3 Drought and Extreme Rainfall using Standardised Precipitation-Evapotranspiration Index (SPEI) 1950-2023
| metadata_field | |
|---|---|
| shortname | Drought_National_Grids_1950_2023_RESTRICTED |
| title | Drought and Extreme Rainfall using Standardised Precipitation-Evapotranspiration Index (SPEI) 1950-2023 |
| creator | Ivan Hanigan |
| contact_email | car.data@sydney.edu.au |
| abstract | The data and methods are for the 2023 MJA-Lancet Countdown report. The drought method follows that outlined in Watts et al.12 We used the Standardised Precipitation-Evapotranspiration Index (SPEI) calculated on 6-month timescale. Data We used monthly rainfall and temperatures, calculated using the Australian Water Availability Project (AWAP) gridded data January 1950 - May 2023 at 0.05 × 0.05 degree resolution.11 Methods This indicator represents the area impacted by excess drought events compared to the 1950-2005 baseline. The drought method follows that outlined in Watts et al.12 We used the Standardised Precipitation-Evapotranspiration Index (SPEI) calculated on 6-month timescale. Due to lack of wind speed data, the potential evapotranspiration (PET) was calculated using the Thornthwaite method rather than the FAO-56 Penman-Monteith method. We used the algorithm provided in the R package “SPEI” (Santiago Beguería and Sergio M. Vicente-Serrano (2017). SPEI: Calculation of the Standardised Precipitation-Evapotranspiration Index. R package version 1.7. The SPEI is a multiscalar index, which takes into account both precipitation (using the basis of the more commonly used SPI index) and temperature, to estimate potential evapotranspiration. More information on this index and its calculation can be found here: https://CRAN.R-project.org/package=SPEI. |
| additional_metadata | /home/public_share_data/ResearchData_CAR/ResearchProjects_CAR/DROUGHT-AWAP-GRIDS-RESTRICTED/Drought_National_Grids_1950_2023_RESTRICTED |
| alternate_identifier | https://cloud.car-dat.org/index.php/apps/files/?dir=/ResearchProjects_CAR/DROUGHT-AWAP-GRIDS-RESTRICTED/Drought_National_Grids_1950_2023_RESTRICTED |
| associated_party | |
| access_rules | RESTRICTED |
| Recommended Citation | Hanigan, I. (2023): Drought and Extreme Rainfall using Standardised Precipitation-Evapotranspiration Index (SPEI) 1950-2023. CAR. (Dataset). https://cloud.car-dat.org/index.php/apps/files/?dir=/ResearchProjects_CAR/DROUGHT-AWAP-GRIDS-RESTRICTED/Drought_National_Grids_1950_2023_RESTRICTED |
| licence_code | No licence |
| accessibility |