{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:16.333359", "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-Aug-12_to_2025-Aug-15_23.0_-27.0"}, "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": 2025080001818}, "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": "August 12 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 15 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": 124160.40393242701}, "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": ["Botswana", "Namibia", "South Africa"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": -27.0}, "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": 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": 19.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -29.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -24.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[23.53, -26.47], [23.68, -26.82], [23.75, -26.85], [24.0, -26.75], [24.5, -26.96], [25.0, -26.75], [25.25, -26.85], [25.5, -26.75], [26.03, -26.97], [26.25, -27.5], [26.03, -28.03], [25.68, -28.18], [25.65, -28.25], [25.75, -28.5], [25.65, -28.75], [25.75, -29.0], [25.53, -29.53], [25.18, -29.68], [25.03, -30.03], [24.5, -30.25], [23.97, -30.03], [23.82, -29.68], [23.47, -29.53], [23.32, -29.18], [23.25, -29.15], [23.0, -29.25], [22.47, -29.03], [22.32, -28.68], [21.97, -28.53], [21.75, -28.0], [21.85, -27.75], [21.82, -27.68], [21.47, -27.53], [21.32, -27.18], [20.97, -27.03], [20.75, -26.5], [20.85, -26.25], [20.82, -26.18], [20.75, -26.15], [20.5, -26.25], [20.25, -26.15], [20.0, -26.25], [19.47, -26.03], [19.25, -25.5], [19.35, -25.25], [19.32, -25.18], [18.97, -25.03], [18.75, -24.5], [18.85, -24.25], [18.75, -24.0], [18.97, -23.47], [19.5, -23.25], [19.75, -23.35], [20.0, -23.25], [20.53, -23.47], [20.68, -23.82], [20.75, -23.85], [21.0, -23.75], [21.53, -23.97], [21.68, -24.32], [22.03, -24.47], [22.18, -24.82], [22.53, -24.97], [22.68, -25.32], [23.03, -25.47], [23.25, -26.0], [23.15, -26.25], [23.18, -26.32], [23.53, -26.47]]]]}}, "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": {"2025-08-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.0, -28.25], [24.47, -28.03], [24.25, -27.5], [24.47, -26.97], [25.0, -26.75], [25.53, -26.97], [25.75, -27.5], [25.53, -28.03], [25.0, -28.25]]], [[[18.97, -23.47], [19.5, -23.25], [19.75, -23.35], [20.0, -23.25], [20.53, -23.47], [20.68, -23.82], [20.75, -23.85], [21.0, -23.75], [21.53, -23.97], [21.68, -24.32], [22.03, -24.47], [22.18, -24.82], [22.53, -24.97], [22.68, -25.32], [23.03, -25.47], [23.25, -26.0], [23.15, -26.25], [23.18, -26.32], [23.53, -26.47], [23.75, -27.0], [23.65, -27.25], [23.75, -27.5], [23.65, -27.75], [23.68, -27.82], [24.03, -27.97], [24.25, -28.5], [24.03, -29.03], [23.5, -29.25], [23.25, -29.15], [23.0, -29.25], [22.47, -29.03], [22.32, -28.68], [21.97, -28.53], [21.75, -28.0], [21.85, -27.75], [21.82, -27.68], [21.47, -27.53], [21.32, -27.18], [20.97, -27.03], [20.75, -26.5], [20.85, -26.25], [20.82, -26.18], [20.75, -26.15], [20.5, -26.25], [20.25, -26.15], [20.0, -26.25], [19.47, -26.03], [19.25, -25.5], [19.35, -25.25], [19.32, -25.18], [18.97, -25.03], [18.75, -24.5], [18.85, -24.25], [18.75, -24.0], [18.97, -23.47]]]]}, "2025-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, -24.0], [18.97, -23.47], [19.5, -23.25], [19.75, -23.35], [20.0, -23.25], [20.53, -23.47], [20.68, -23.82], [20.75, -23.85], [21.0, -23.75], [21.53, -23.97], [21.68, -24.32], [22.03, -24.47], [22.18, -24.82], [22.53, -24.97], [22.68, -25.32], [23.03, -25.47], [23.25, -26.0], [23.15, -26.25], [23.18, -26.32], [23.53, -26.47], [23.68, -26.82], [23.75, -26.85], [24.0, -26.75], [24.5, -26.96], [25.0, -26.75], [25.25, -26.85], [25.5, -26.75], [26.03, -26.97], [26.25, -27.5], [26.03, -28.03], [25.68, -28.18], [25.65, -28.25], [25.75, -28.5], [25.65, -28.75], [25.75, -29.0], [25.53, -29.53], [25.18, -29.68], [25.03, -30.03], [24.5, -30.25], [23.97, -30.03], [23.82, -29.68], [23.47, -29.53], [23.32, -29.18], [23.25, -29.15], [23.0, -29.25], [22.47, -29.03], [22.32, -28.68], [21.97, -28.53], [21.75, -28.0], [21.85, -27.75], [21.82, -27.68], [21.47, -27.53], [21.32, -27.18], [20.97, -27.03], [20.75, -26.5], [20.85, -26.25], [20.82, -26.18], [20.75, -26.15], [20.5, -26.25], [20.25, -26.15], [20.0, -26.25], [19.47, -26.03], [19.25, -25.5], [19.35, -25.25], [19.32, -25.18], [18.97, -25.03], [18.75, -24.5], [18.85, -24.25], [18.75, -24.0]]]]}, "2025-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, -24.0], [18.97, -23.47], [19.5, -23.25], [19.75, -23.35], [20.0, -23.25], [20.53, -23.47], [20.68, -23.82], [20.75, -23.85], [21.0, -23.75], [21.53, -23.97], [21.68, -24.32], [22.03, -24.47], [22.18, -24.82], [22.53, -24.97], [22.68, -25.32], [23.03, -25.47], [23.25, -26.0], [23.15, -26.25], [23.18, -26.32], [23.53, -26.47], [23.68, -26.82], [23.75, -26.85], [24.0, -26.75], [24.5, -26.96], [25.0, -26.75], [25.25, -26.85], [25.5, -26.75], [26.03, -26.97], [26.25, -27.5], [26.03, -28.03], [25.68, -28.18], [25.65, -28.25], [25.75, -28.5], [25.65, -28.75], [25.75, -29.0], [25.53, -29.53], [25.18, -29.68], [25.03, -30.03], [24.5, -30.25], [23.97, -30.03], [23.82, -29.68], [23.47, -29.53], [23.32, -29.18], [23.25, -29.15], [23.0, -29.25], [22.47, -29.03], [22.32, -28.68], [21.97, -28.53], [21.75, -28.0], [21.85, -27.75], [21.82, -27.68], [21.47, -27.53], [21.32, -27.18], [20.97, -27.03], [20.75, -26.5], [20.85, -26.25], [20.82, -26.18], [20.75, -26.15], [20.5, -26.25], [20.25, -26.15], [20.0, -26.25], [19.47, -26.03], [19.25, -25.5], [19.35, -25.25], [19.32, -25.18], [18.97, -25.03], [18.75, -24.5], [18.85, -24.25], [18.75, -24.0]]]]}, "2025-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -27.0], [22.47, -26.47], [23.0, -26.25], [23.53, -26.47], [23.68, -26.82], [23.75, -26.85], [24.0, -26.75], [24.5, -26.96], [25.0, -26.75], [25.25, -26.85], [25.5, -26.75], [26.03, -26.97], [26.25, -27.5], [26.03, -28.03], [25.68, -28.18], [25.65, -28.25], [25.75, -28.5], [25.65, -28.75], [25.75, -29.0], [25.53, -29.53], [25.18, -29.68], [25.03, -30.03], [24.5, -30.25], [23.97, -30.03], [23.82, -29.68], [23.47, -29.53], [23.25, -29.0], [23.35, -28.75], [23.32, -28.68], [22.97, -28.53], [22.82, -28.18], [22.47, -28.03], [22.25, -27.5], [22.35, -27.25], [22.25, -27.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 6.478533532429992}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.89081967046971}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.538973170454767, 18.264141054506638, 19.090410783555797, 17.424040282006388]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.974782562255882, 20.926431274414085, 21.80460891723635, 18.52173004150393]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.3829043238889875, 4.680547374254522, 5.409636887164686, 5.000281689435108]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.853833572964618, 5.7278967605499815, 6.478533532429992, 6.028261221089792]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3106678243649807, 1.4407500303214105, 1.6599540934659702, 1.636807019414197]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.4316388213803106, 1.6444970326724808, 1.8826692278012076, 2.052095151619625]}}