Compound Drought and Heatwave (CDHW) Events – Senegal, 1981-2023

Science Case Name Multi-Hazards in Senegal. Dataset Name/Title Compound Drought and Heatwave (CDHW) Events – Senegal, 1981-2023 Dataset Description The dataset contains gridded data on co-ocurrence of droughts and heatwaves (CDHW) over the whole area of Senegal. Key Methodologies Droughts were defined as events with Z-scores of SPI-6 below or equal to -1. 6-month standardized precipitation index (SPI-6) was computed from CHIRPS mothly precipitaiton data. Heatwaves were defined as at least 3-day-long events on which daily maximum air temperature exceeded the above the 90th percentile of the 31-day moving average daily maximum air temperature. Two heatwave events separated by only one day were merged into a single event. Daily maximum air temperature at 2 meters was downloaded from ERA5-Land dataset. CDHW is a spatial and temporal intersection of droughts and heatwaves. The uploaded dataset has values 1 in cell with CDHW and 0 othwerwise. Temporal Domain 1981–2023 Spatial Domain Senegal, West Africa Spatial resolution ca 0.1°x0.1° (EPGS:4326) Key Variables/Indicators Spatio-temporal clusters of dry/drought events Data Format netCDF Source Data ERA5-Land and CHIRPS Accessibility Zenodo, doi 10.5281/zenodo.1521194 Stakeholder Relevance Identifying and assessing past compound hot and dry events for multihazard events monitoring, prediction and preparedness. Limitations/Assumptions 43 years of data are sufficient for SPI computation Additional Outputs/information The dataset access is currently restricted due to pending related publication. Contact Information Egor Prikaziuk (UT-ITC, Faculty of Geo-Information Science and Earth Observation, ITC, University of Twente, the Netherlands)