{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:46.467620", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2025-Apr-14_to_2025-Apr-17_25.0_-16.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2025040001814}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "April 14 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 17 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 121431.73935137001}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Zambia", "Zimbabwe"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": -16.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 25.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "25.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 24.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 29.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -18.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -14.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[27.5, -18.54], [27.0, -18.75], [26.75, -18.65], [26.5, -18.75], [25.97, -18.53], [25.82, -18.18], [25.75, -18.15], [25.5, -18.25], [24.97, -18.03], [24.8, -17.62], [24.68, -17.68], [24.53, -18.03], [24.0, -18.25], [23.47, -18.03], [23.25, -17.5], [23.35, -17.25], [23.25, -17.0], [23.35, -16.75], [23.25, -16.5], [23.47, -15.97], [23.82, -15.82], [23.97, -15.47], [24.5, -15.25], [24.75, -15.35], [24.82, -15.32], [24.97, -14.97], [25.5, -14.75], [25.75, -14.85], [25.88, -14.8], [25.75, -14.5], [25.97, -13.97], [26.5, -13.75], [27.03, -13.97], [27.18, -14.32], [27.53, -14.47], [27.68, -14.82], [27.75, -14.85], [28.0, -14.75], [28.53, -14.97], [28.75, -15.5], [28.57, -15.93], [29.0, -15.75], [29.53, -15.97], [29.75, -16.5], [29.65, -16.75], [29.75, -17.0], [29.65, -17.25], [29.75, -17.5], [29.65, -17.75], [29.75, -18.0], [29.53, -18.53], [29.0, -18.75], [28.5, -18.54], [28.0, -18.75], [27.5, -18.54]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa", "E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.25, -17.0], [23.35, -16.75], [23.25, -16.5], [23.47, -15.97], [23.82, -15.82], [23.97, -15.47], [24.5, -15.25], [24.75, -15.35], [24.82, -15.32], [24.97, -14.97], [25.5, -14.75], [25.75, -14.85], [25.88, -14.8], [25.75, -14.5], [25.97, -13.97], [26.5, -13.75], [27.03, -13.97], [27.18, -14.32], [27.53, -14.47], [27.68, -14.82], [27.75, -14.85], [28.0, -14.75], [28.53, -14.97], [28.75, -15.5], [28.57, -15.93], [29.0, -15.75], [29.53, -15.97], [29.75, -16.5], [29.65, -16.75], [29.75, -17.0], [29.65, -17.25], [29.75, -17.5], [29.65, -17.75], [29.75, -18.0], [29.53, -18.53], [29.0, -18.75], [28.47, -18.53], [28.32, -18.18], [28.0, -18.04], [27.5, -18.25], [27.2, -18.12], [27.03, -18.53], [26.5, -18.75], [25.97, -18.53], [25.82, -18.18], [25.75, -18.15], [25.5, -18.25], [24.97, -18.03], [24.8, -17.62], [24.68, -17.68], [24.53, -18.03], [24.0, -18.25], [23.47, -18.03], [23.25, -17.5], [23.35, -17.25], [23.25, -17.0]]]]}, "2025-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.25, -17.0], [23.35, -16.75], [23.25, -16.5], [23.47, -15.97], [23.82, -15.82], [23.97, -15.47], [24.5, -15.25], [24.75, -15.35], [24.82, -15.32], [24.97, -14.97], [25.5, -14.75], [25.75, -14.85], [25.88, -14.8], [25.75, -14.5], [25.97, -13.97], [26.5, -13.75], [27.03, -13.97], [27.18, -14.32], [27.53, -14.47], [27.68, -14.82], [27.75, -14.85], [28.0, -14.75], [28.53, -14.97], [28.75, -15.5], [28.57, -15.93], [29.0, -15.75], [29.53, -15.97], [29.75, -16.5], [29.65, -16.75], [29.75, -17.0], [29.65, -17.25], [29.75, -17.5], [29.65, -17.75], [29.75, -18.0], [29.53, -18.53], [29.0, -18.75], [28.5, -18.54], [28.0, -18.75], [27.5, -18.54], [27.0, -18.75], [26.75, -18.65], [26.5, -18.75], [25.97, -18.53], [25.82, -18.18], [25.75, -18.15], [25.5, -18.25], [24.97, -18.03], [24.8, -17.62], [24.68, -17.68], [24.53, -18.03], [24.0, -18.25], [23.47, -18.03], [23.25, -17.5], [23.35, -17.25], [23.25, -17.0]]]]}, "2025-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.25, -17.0], [23.35, -16.75], [23.25, -16.5], [23.47, -15.97], [23.82, -15.82], [23.97, -15.47], [24.5, -15.25], [24.75, -15.35], [24.82, -15.32], [24.97, -14.97], [25.5, -14.75], [25.75, -14.85], [25.88, -14.8], [25.75, -14.5], [25.97, -13.97], [26.5, -13.75], [27.03, -13.97], [27.18, -14.32], [27.53, -14.47], [27.68, -14.82], [27.75, -14.85], [28.0, -14.75], [28.53, -14.97], [28.75, -15.5], [28.57, -15.93], [29.0, -15.75], [29.53, -15.97], [29.75, -16.5], [29.65, -16.75], [29.75, -17.0], [29.65, -17.25], [29.75, -17.5], [29.65, -17.75], [29.75, -18.0], [29.53, -18.53], [29.0, -18.75], [28.5, -18.54], [28.0, -18.75], [27.5, -18.54], [27.0, -18.75], [26.75, -18.65], [26.5, -18.75], [25.97, -18.53], [25.82, -18.18], [25.75, -18.15], [25.5, -18.25], [24.97, -18.03], [24.8, -17.62], [24.68, -17.68], [24.53, -18.03], [24.0, -18.25], [23.47, -18.03], [23.25, -17.5], [23.35, -17.25], [23.25, -17.0]]]]}, "2025-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.47, -16.97], [26.82, -16.82], [26.97, -16.47], [27.5, -16.25], [28.03, -16.47], [28.2, -16.87], [28.5, -16.75], [29.03, -16.97], [29.25, -17.5], [29.03, -18.03], [28.68, -18.18], [28.53, -18.53], [28.0, -18.75], [27.5, -18.54], [27.0, -18.75], [26.47, -18.53], [26.25, -18.0], [26.35, -17.75], [26.25, -17.5], [26.47, -16.97]]], [[[23.97, -15.47], [24.5, -15.25], [25.03, -15.47], [25.18, -15.82], [25.53, -15.97], [25.75, -16.5], [25.53, -17.03], [25.0, -17.25], [24.47, -17.03], [24.32, -16.68], [23.97, -16.53], [23.75, -16.0], [23.97, -15.47]]], [[[25.97, -16.03], [25.75, -15.5], [25.97, -14.97], [26.5, -14.75], [27.03, -14.97], [27.25, -15.5], [27.03, -16.03], [26.5, -16.25], [25.97, -16.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 3.338360707441325}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.1725869412829675}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.62018516942078, 24.22258787077618, 24.39446677851481, 24.221270497639978]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.131220753987634, 26.822066243489587, 26.47735748291018, 25.980639394124353]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.7594321713625185, 2.3239912988766784, 2.452528464865079, 1.9244244573790112]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [2.7714708427621986, 3.338360707441325, 3.12822335349739, 2.608968331514177]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4099364615986965, 1.9008116886392414, 1.9891239919888024, 1.4803405360041078]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.010496580287507, 2.2517237198718916, 2.619886719715665, 1.7208682255819205]}}