{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:40.330000", "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-Dec-29_to_2025-Dec-31_23.0_-31.5"}, "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": 2025120002659}, "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": "December 29 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 31 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 59080.63591121776}, "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": ["Namibia", "South Africa"]}, "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": -31.5}, "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": 23.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "23.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 19.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -31.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -28.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[19.75, -27.35], [20.0, -27.25], [20.25, -27.35], [20.5, -27.25], [21.03, -27.47], [21.18, -27.82], [21.25, -27.85], [21.5, -27.75], [21.75, -27.85], [22.0, -27.75], [22.53, -27.97], [22.68, -28.32], [23.03, -28.47], [23.25, -29.0], [23.15, -29.25], [23.25, -29.5], [23.04, -30.0], [23.18, -30.32], [23.25, -30.35], [23.5, -30.25], [24.03, -30.47], [24.25, -31.0], [24.15, -31.25], [24.25, -31.5], [24.03, -32.03], [23.5, -32.25], [23.25, -32.15], [23.0, -32.25], [22.47, -32.03], [22.32, -31.68], [22.25, -31.65], [22.0, -31.75], [21.75, -31.65], [21.5, -31.75], [20.97, -31.53], [20.75, -31.0], [20.97, -30.47], [21.32, -30.32], [21.35, -30.25], [21.25, -30.0], [21.35, -29.75], [21.25, -29.5], [21.35, -29.25], [21.32, -29.18], [21.25, -29.15], [21.0, -29.25], [20.47, -29.03], [20.32, -28.68], [20.25, -28.65], [20.18, -28.68], [20.03, -29.03], [19.5, -29.25], [19.25, -29.15], [19.0, -29.25], [18.47, -29.03], [18.25, -28.5], [18.47, -27.97], [18.82, -27.82], [18.97, -27.47], [19.5, -27.25], [19.75, -27.35]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, -27.47], [19.5, -27.25], [19.75, -27.35], [20.0, -27.25], [20.25, -27.35], [20.5, -27.25], [21.03, -27.47], [21.18, -27.82], [21.25, -27.85], [21.5, -27.75], [21.75, -27.85], [22.0, -27.75], [22.53, -27.97], [22.68, -28.32], [23.03, -28.47], [23.25, -29.0], [23.15, -29.25], [23.25, -29.5], [23.04, -30.0], [23.18, -30.32], [23.25, -30.35], [23.5, -30.25], [24.03, -30.47], [24.25, -31.0], [24.15, -31.25], [24.25, -31.5], [24.03, -32.03], [23.5, -32.25], [23.25, -32.15], [23.0, -32.25], [22.47, -32.03], [22.32, -31.68], [22.25, -31.65], [22.0, -31.75], [21.75, -31.65], [21.5, -31.75], [20.97, -31.53], [20.75, -31.0], [20.97, -30.47], [21.32, -30.32], [21.35, -30.25], [21.25, -30.0], [21.35, -29.75], [21.25, -29.5], [21.35, -29.25], [21.32, -29.18], [21.25, -29.15], [21.0, -29.25], [20.47, -29.03], [20.32, -28.68], [20.25, -28.65], [20.18, -28.68], [20.03, -29.03], [19.5, -29.25], [19.25, -29.15], [19.0, -29.25], [18.47, -29.03], [18.25, -28.5], [18.47, -27.97], [18.82, -27.82], [18.97, -27.47]]]]}, "2025-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, -27.47], [19.5, -27.25], [19.75, -27.35], [20.0, -27.25], [20.25, -27.35], [20.5, -27.25], [21.03, -27.47], [21.18, -27.82], [21.25, -27.85], [21.5, -27.75], [21.75, -27.85], [22.0, -27.75], [22.53, -27.97], [22.68, -28.32], [23.03, -28.47], [23.25, -29.0], [23.15, -29.25], [23.25, -29.5], [23.04, -30.0], [23.18, -30.32], [23.25, -30.35], [23.5, -30.25], [24.03, -30.47], [24.25, -31.0], [24.15, -31.25], [24.25, -31.5], [24.03, -32.03], [23.5, -32.25], [23.25, -32.15], [23.0, -32.25], [22.47, -32.03], [22.32, -31.68], [22.25, -31.65], [22.0, -31.75], [21.75, -31.65], [21.5, -31.75], [20.97, -31.53], [20.75, -31.0], [20.97, -30.47], [21.32, -30.32], 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maximum t2m.", "value": [32.989856974283896, 33.17158025105795, 32.704690551757835]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.115872285018662, 5.120946859781487, 3.9488949833523517]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.9881147041595, 5.991799671027081, 4.397041563078574]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3885281661202855, 1.7054194143751786, 1.3169858798262464]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.6128461691471263, 1.9583745336754645, 1.4246136570149683]}}