The indices offered through Climdex have been already calculated for several observational datasets. Although these source datasets are described as gridded analyses, we often offer data for the individual stations too. For the most up-to-date and quality-controlled dataset use HadEX3. If you need near-realtime data use GHCNDEX. HadEX2 is hosted here for comparison studies.
We offer time series for stations where available, whereas for gridded products we also offer average maps, trend maps and raw yearly data across any spatial domain. These products are variously available as text files, NetCDF files and image files.
| Name | Description | Resolution | Years | Reference | Access |
|---|---|---|---|---|---|
| HadEX3 |
HadEX3 is a gridded analysis using approximately 7,000 stations for temperature and 17,000 stations for precipitation to cover the period 1901-2018. Two versions of HadEX3 are available, one using a reference period of 1961-1990 and another using a reference period of 1981-2010 (this latter dataset only contains indices dependent on the reference period, i.e. it only contains percentile-based indices). Robert Dunn maintains a blog about the the HadEX3 dataset here and the United Kingdom Met Office homepage for the HadEX3 dataset can be found here. |
1.875°×1.25° | 1901–2018 | Dunn et al. 2020 | |
| HadEX2 | HadEX2 is a gridded analysis of between 7,000 and 11,000 high quality stations over the 1901–2010 period. | 3.75°×2.5° | 1901–2010 | Donat et al. 2013a | |
| GHCNDEX | GHCNDEX is a gridded analysis of long-term stations from the Global Historical Climatology Network (GHCN)-Daily dataset. It is regularly updated with new observations, although more recent data may not be available in some regions. | 2.5°×2.5° | 1951–present | Donat et al. 2013b | |
| REGEN LONG V1 (Masked) | A global land-based gridded dataset of daily precipitation at degree resolution from 1950 to 2016. The masked tag denotes that this dataset has been quality masked to give better observation. This dataset interpolates daily precipitation only the long-term stations (stations with at least 40 complete years of data). A second related dataset interpolates all daily precipitation stations available regardless of completeness of station timeseries. Besides the grid cell average precipitation amount per day (mm/day), the Yamamoto standard deviation per grid cell (mm/day), the kriging error per grid cell (%) and number of stations per grid cell variables are also included. | 1°×1° | 1950-2016 | Contracter et al. 2019 | |
| REGEN LONG V1 (Unmasked) | A global land-based gridded dataset of daily precipitation at 1 degree X 1 degree resolution from 1950 to 2016. The unmasked tag denotes that the dataset has NOT been quality masked, offering more unreliable observational data. This dataset interpolates daily precipitation only the long-term stations (stations with at least 40 complete years of data). A second related dataset interpolates all daily precipitation stations available regardless of completeness of station timeseries. Besides the grid cell average precipitation amount per day (mm/day), the Yamamoto standard deviation per grid cell (mm/day), the kriging error per grid cell (%) and number of stations per grid cell variables are also included. | 1°×1° | 1950-2016 | Contracter et al. 2019 |
We also host the following datasets on climdex, but they are not part of the climdex.org project.
| Name | Description | Resolution | Years | Reference | Access |
|---|---|---|---|---|---|
| AGCD v1 | Australian Gridded Climate Data (AGCD) / Australian Water Availability Project (AWAP) is the Bureau of Meteorology's official dataset for climate analyses covering the variables of rainfall, temperature (maximum and minimum) as well as vapour pressure at daily and monthly timescales. The dataset provides consistent temporal and spatial analyses across Australia for each observed data variable. This accounts for spatial and temporal gaps in observations. Where possible, the gridded analysis techniques provide useful estimates in data-sparse regions such as central Australia. | 0.25°×0.25° | 1900-2022 | Australian Bureau of Meteorology 2020 | |
| BEST | BEST (Berkeley Earth Surface Temperature) provides high-resolution land and ocean time series data and gridded temperature data. Their peer-reviewed methodology incorporates more temperature observations than other available products, and often has better coverage. BEST is updated frequently on their website. | 1°×1° | 1880–2019 | Rohde et al. (2013) | |
| APHRODITE | APHRODITE’s (Asian Precipitation - Highly-Resolved Observational Data Integration Towards Evaluation) gridded precipitation is a set of long-term (1951 onward) continental-scale daily products that is based on a dense network of rain-gauge data for Asia including the Himalayas, South and Southeast Asia and mountainous areas in the Middle East. We currently offer observations over SE Asia (lat: -14.75°24°N, lon: 90.25°144.75°E) | .25°×0.25° | 1951–2016 | Yatagai et al. (2012) |
Pre-computed Climdex indices for a number of climate models in the Coupled Model Intercomparison Project — Phase 3 (CMIP3) and Phase 5 (CMIP5) are available from Environment Canada.