{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:21.186316", "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-May-15_to_2025-May-19_22.5_-33.0"}, "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": 2025050001924}, "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": "May 15 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 19 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 51934.28906937625}, "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": ["South Africa"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": -33.0}, "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": 22.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "22.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 21.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -33.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -32.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[21.25, -31.85], [21.32, -31.82], [21.47, -31.47], [22.0, -31.25], [22.5, -31.46], [23.0, -31.25], [23.53, -31.47], [23.68, -31.82], [23.75, -31.85], [24.0, -31.75], [24.53, -31.97], [24.68, -32.32], [24.75, -32.35], [25.0, -32.25], [25.53, -32.47], [25.75, -33.0], [25.53, -33.53], [25.0, -33.75], [24.75, -33.65], [24.5, -33.75], [24.2, -33.62], [24.03, -34.03], [23.5, -34.25], [23.25, -34.15], [23.0, -34.25], [22.5, -34.04], [22.0, -34.25], [21.75, -34.15], [21.5, -34.25], [20.97, -34.03], [20.82, -33.68], [20.47, -33.53], [20.25, -33.0], [20.35, -32.75], [20.25, -32.5], [20.47, -31.97], [21.0, -31.75], [21.25, -31.85]]]]}}, "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": {"2025-05-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -32.47], [22.5, -32.25], [23.03, -32.47], [23.25, -33.0], [23.03, -33.53], [22.5, -33.75], [21.97, -33.53], [21.75, -33.0], [21.97, -32.47]]]]}, "2025-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.25, -32.5], [20.47, -31.97], [21.0, -31.75], [21.25, -31.85], [21.5, -31.75], [22.03, -31.97], [22.18, -32.32], [22.25, -32.35], [22.5, -32.25], [23.03, -32.47], [23.18, -32.82], [23.25, -32.85], [23.5, -32.75], [24.03, -32.97], [24.25, -33.5], [24.03, -34.03], [23.5, -34.25], [23.25, -34.15], [23.0, -34.25], [22.47, -34.03], [22.32, -33.68], [22.25, -33.65], [22.18, -33.68], [22.03, -34.03], [21.5, -34.25], [20.97, -34.03], [20.82, -33.68], [20.47, -33.53], [20.25, -33.0], [20.35, -32.75], [20.25, -32.5]]]]}, "2025-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.25, -32.5], [20.47, -31.97], [21.0, -31.75], [21.25, -31.85], [21.32, -31.82], [21.47, -31.47], [22.0, -31.25], [22.5, -31.46], [23.0, -31.25], [23.53, -31.47], [23.68, -31.82], [23.75, -31.85], [24.0, -31.75], [24.53, -31.97], [24.68, -32.32], [24.75, -32.35], [25.0, -32.25], [25.53, -32.47], [25.75, -33.0], [25.53, -33.53], [25.0, -33.75], [24.75, -33.65], [24.5, -33.75], [24.2, -33.62], [24.03, -34.03], [23.5, -34.25], [23.25, -34.15], [23.0, -34.25], [22.5, -34.04], [22.0, -34.25], [21.75, -34.15], [21.5, -34.25], [20.97, -34.03], [20.82, -33.68], [20.47, -33.53], [20.25, -33.0], [20.35, -32.75], [20.25, -32.5]]]]}, "2025-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.25, -32.5], [20.47, -31.97], [21.0, -31.75], [21.25, -31.85], [21.32, -31.82], [21.47, -31.47], [22.0, -31.25], [22.5, -31.46], [23.0, -31.25], [23.53, -31.47], [23.68, -31.82], [23.75, -31.85], [24.0, -31.75], [24.53, -31.97], [24.68, -32.32], [24.75, -32.35], [25.0, -32.25], [25.53, -32.47], [25.75, -33.0], [25.53, -33.53], [25.0, -33.75], [24.75, -33.65], [24.5, -33.75], [24.2, -33.62], [24.03, -34.03], [23.5, -34.25], [23.25, -34.15], [23.0, -34.25], [22.5, -34.04], [22.0, -34.25], [21.75, -34.15], [21.5, -34.25], [20.97, -34.03], [20.82, -33.68], [20.47, -33.53], [20.25, -33.0], [20.35, -32.75], [20.25, -32.5]]]]}, "2025-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.75, -32.5], [20.97, -31.97], [21.32, -31.82], [21.47, -31.47], [22.0, -31.25], [22.5, -31.46], [23.0, -31.25], [23.53, -31.47], [23.68, -31.82], [23.75, -31.85], [24.0, -31.75], [24.53, -31.97], [24.68, -32.32], [24.75, -32.35], [25.0, -32.25], [25.53, -32.47], [25.75, -33.0], [25.53, -33.53], [25.0, -33.75], [24.75, -33.65], [24.5, -33.75], [24.2, -33.62], [24.03, -34.03], [23.5, -34.25], [23.25, -34.15], [23.0, -34.25], [22.5, -34.04], [22.0, -34.25], [21.47, -34.03], [21.32, -33.68], [20.97, -33.53], [20.75, -33.0], [20.85, -32.75], [20.75, -32.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 7.834552637058891}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.418742057639598}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.353562927246116, 18.896130851463056, 19.6924883524577, 21.00673065185549, 20.22561087514839]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.353562927246116, 20.459137217203818, 22.758105214436853, 24.035864766438806, 22.36081212361654]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.581051030894173, 4.473309395822854, 4.941699381925517, 6.365448037338576, 5.415996110780668]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.581051030894173, 5.60542772040526, 6.448860776074014, 7.834552637058891, 7.215037270933237]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4749557220604703, 1.6245497959000252, 1.7229909418906293, 2.1198197243349517, 1.6892240367364657]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.4749557220604703, 1.8290571671693168, 2.1999565195874893, 2.5594996099408656, 2.120075081443041]}}