Stakeholder Map
Stakeholder Map
| Indices | Brief Introduction | Data Access | Recommended Usage |
| Standardized Precipitation Index (SPI) | The Standardized Precipitation Index (SPI) is a widely used index to characterize meteorological drought on a range of timescales. It can characterize drought at different time scales which correspond with the time availability of different water resources (e.g. soil moisture, snowpack, groundwater, river discharge and reservoir storage). The SPI can be compared across regions with markedly different climates.[1] | Meteorological/hydrological/ecological drought | |
| Standardized precipitation evapotranspiration index (SPEI) | SPEI serves as a comprehensive drought index due to its multi-scalar nature, accommodating diverse scientific disciplines for detecting, monitoring, and analyzing droughts. SPEI assesses drought severity based on intensity and duration, identifying onset and cessation of drought episodes. Its versatility allows for comparative analysis across different climates and over time.[2] |
|
Ecological drought |
| Palmer drought severity index (PDSI) | PDSI is a regional drought index commonly used for measuring the severity of drought conditions. It is a standardized index that ranges from -10 (dry) to +10 (wet), with >4 indicating extreme wet conditions and <-4 indicating extreme dry conditions.[3]
Self-calculating PDSI is not easy, as a multitude of computation is involved. Some open-source code is available online. Here is one from Jacobi et al. (2013)(see "Supporting Information" for the code).[4] |
|
Meteorological and ecological drought |
| Standardized runoff index (SRI) | SRI is used to characterize hydrological drought. |
|
Hydrological drought |
| FAO Agricultural Stress Index System (ASIS) | ASIS monitors agricultural areas with a high likelihood of water stress/drought at global, regional and country level, using satellite technology. | Agricultural droughyt | |
| U.S. Drought Monitor (USDM) | USDM uses a multi-indicator drought index where it integrating several key drought monitoring that measure temperatures, soil moisture, water levels in streams and lakes, snow cover, and meltwater runoff. The map is released every Thursday, showing where drought is and how bad it is across the U.S. and its territories. The map uses six classifications: normal conditions, abnormally dry (D0), showing areas that may be going into or are coming out of drought, and four levels of drought: moderate (D1), severe (D2), extreme (D3) and exceptional (D4). | Meteorological/hydrological/ecological drought | |
| U.S. Climate Extremes Index (CEI) | The CEI evaluates the percent area of extremes in the distribution of much above/below average (top/bottom 10% of occurrence) temperatures, precipitation, drought, and tropical cyclone wind speed across the CONUS and is measured as the percent area of the U.S./region experiencing extremes for a given season.[5] |
|
|
| Consecutive Dry Days (CDD) | Maximum number of consecutive dry days with less than 1 mm of precipitation per day | A code for calculating CDD is provided by Earth System Model Evaluation Tool. | |
| Standardized soil moisture index (SSMI) | SSMI is calculated as the soil moisture content normalized by the recent past climatological values at each grid point. The soil moisture content can be the content integrated over the entire soil depth or just the surface layer. Note that soil moisture data in general has greater uncertainties compared to atmospheric data. Cautions should be used when using soil moisture index to assess the drought risk in future climate scenarios. |
|
- ↑ Keyantash, John & National Center for Atmospheric Research Staff (Eds). Last modified 2023-08-19 "The Climate Data Guide: Standardized Precipitation Index (SPI).” Retrieved from https://climatedataguide.ucar.edu/climate-data/standardized-precipitation-index-spi on 2024-07-19.
- ↑ https://spei.csic.es/home.html
- ↑ Dai, Aiguo & National Center for Atmospheric Research Staff (Eds). Last modified 2023-08-19 "The Climate Data Guide: Palmer Drought Severity Index (PDSI).” Retrieved from https://climatedataguide.ucar.edu/climate-data/palmer-drought-severity-index-pdsi on 2024-07-17.
- ↑ https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/wrcr.20342
- ↑ Gleason, Karin & National Center for Atmospheric Research Staff (Eds). Last modified 2023-08-21 "The Climate Data Guide: U.S. Climate Extremes Index (CEI).” Retrieved from https://climatedataguide.ucar.edu/climate-data/us-climate-extremes-index-cei on 2024-07-19.