{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:02.515835", "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-Nov-20_to_2025-Nov-22_19.5_-31.0"}, "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": 2025110002075}, "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": "November 20 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 22 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": 69512.70833283072}, "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": -31.0}, "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": 19.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "19.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 18.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 21.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -32.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -29.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[18.47, -28.97], [18.82, -28.82], [18.97, -28.47], [19.5, -28.25], [19.75, -28.35], [20.0, -28.25], [20.25, -28.35], [20.5, -28.25], [20.75, -28.35], [21.0, -28.25], [21.53, -28.47], [21.68, -28.82], [22.03, -28.97], [22.25, -29.5], [22.03, -30.03], [21.68, -30.18], [21.65, -30.25], [21.75, -30.5], [21.53, -31.03], [21.0, -31.25], [20.75, -31.15], [20.68, -31.18], [20.65, -31.25], [20.75, -31.5], [20.65, -31.75], [20.75, -32.0], [20.53, -32.53], [20.0, -32.75], [19.47, -32.53], [19.32, -32.18], [18.97, -32.03], [18.75, -31.5], [18.85, -31.25], [18.82, -31.18], [18.75, -31.15], [18.5, -31.25], [17.97, -31.03], [17.75, -30.5], [17.97, -29.97], [18.32, -29.82], [18.35, -29.75], [18.25, -29.5], [18.47, -28.97]]]]}}, "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": {"2025-11-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.35, -29.75], [18.25, -29.5], [18.47, -28.97], [18.82, -28.82], [18.97, -28.47], [19.5, -28.25], [19.75, -28.35], [20.0, -28.25], [20.25, -28.35], [20.5, -28.25], [20.75, -28.35], [21.0, -28.25], [21.53, -28.47], [21.68, -28.82], [22.03, -28.97], [22.25, -29.5], [22.03, -30.03], [21.68, -30.18], [21.65, -30.25], [21.75, -30.5], [21.53, -31.03], [21.0, -31.25], [20.75, -31.15], [20.68, -31.18], [20.65, -31.25], [20.75, -31.5], [20.65, -31.75], [20.75, -32.0], [20.53, -32.53], [20.0, -32.75], [19.47, -32.53], [19.32, -32.18], [18.97, -32.03], [18.75, -31.5], [18.85, -31.25], [18.82, -31.18], [18.75, -31.15], [18.5, -31.25], [17.97, -31.03], [17.75, -30.5], [17.97, -29.97], [18.32, -29.82], [18.35, -29.75]]]]}, "2025-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.35, -29.75], [18.25, -29.5], [18.47, -28.97], [18.82, -28.82], [18.97, -28.47], [19.5, -28.25], [19.75, -28.35], [20.0, -28.25], [20.25, -28.35], [20.5, -28.25], [20.75, -28.35], [21.0, -28.25], [21.53, -28.47], [21.68, -28.82], [22.03, -28.97], [22.25, -29.5], [22.03, -30.03], [21.68, -30.18], [21.65, -30.25], [21.75, -30.5], [21.53, -31.03], [21.0, -31.25], [20.75, -31.15], [20.68, -31.18], [20.65, -31.25], [20.75, -31.5], [20.65, -31.75], [20.75, -32.0], [20.53, -32.53], [20.0, -32.75], [19.47, -32.53], [19.32, -32.18], [18.97, -32.03], [18.75, -31.5], [18.85, -31.25], [18.82, -31.18], [18.75, -31.15], [18.5, -31.25], [17.97, -31.03], [17.75, -30.5], [17.97, -29.97], [18.32, -29.82], [18.35, -29.75]]]]}, "2025-11-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.35, -29.75], [18.25, -29.5], [18.47, -28.97], [18.82, -28.82], [18.97, -28.47], [19.5, -28.25], [19.75, -28.35], [20.0, -28.25], [20.25, -28.35], [20.5, -28.25], [20.75, -28.35], [21.0, -28.25], [21.53, -28.47], [21.68, -28.82], [22.03, -28.97], [22.25, -29.5], [22.03, -30.03], [21.68, -30.18], [21.65, -30.25], [21.75, -30.5], [21.53, -31.03], [21.0, -31.25], [20.75, -31.15], [20.68, -31.18], [20.65, -31.25], [20.75, -31.5], [20.65, -31.75], [20.75, -32.0], [20.53, -32.53], [20.0, -32.75], [19.47, -32.53], [19.32, -32.18], [18.97, -32.03], [18.75, -31.5], [18.85, -31.25], [18.82, -31.18], [18.75, -31.15], [18.5, -31.25], [17.97, -31.03], [17.75, -30.5], [17.97, -29.97], [18.32, -29.82], [18.35, -29.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 9.120254587787088}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 6.180670730468772}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.69983180119442, 28.293691351474877, 27.312512480907003]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.962927754720056, 30.45808563232424, 31.26873931884768]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [5.485583951004208, 7.044185871739026, 6.012242368663082]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [7.023198541467934, 9.120254587787088, 6.831021987611678]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3106911060573767, 1.7235321322711812, 1.4771819910310653]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.6401580449031754, 2.1749351750883736, 1.7587490797273737]}}