{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:25.653308", "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-22_to_2025-Aug-31_28.0_-16.0"}, "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": 2025080002389}, "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 22 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 31 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 10}, "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": 50239.03662009828}, "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": -16.0}, "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": 28.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "28.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 27.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 30.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -18.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -16.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[27.75, -15.35], [28.0, -15.25], [28.25, -15.35], [28.5, -15.25], [28.75, -15.35], [29.0, -15.25], [29.25, -15.35], [29.5, -15.25], [30.03, -15.47], [30.25, -16.0], [30.15, -16.25], [30.25, -16.5], [30.15, -16.75], [30.18, -16.82], [30.53, -16.97], [30.75, -17.5], [30.53, -18.03], [30.18, -18.18], [30.03, -18.53], [29.5, -18.75], [29.25, -18.65], [29.18, -18.68], [29.03, -19.03], [28.5, -19.25], [27.97, -19.03], [27.75, -18.5], [27.85, -18.25], [27.75, -18.0], [27.85, -17.75], [27.75, -17.5], [27.97, -16.97], [28.32, -16.82], [28.35, -16.75], [28.32, -16.68], [28.25, -16.65], [28.0, -16.75], [27.75, -16.65], [27.5, -16.75], [26.97, -16.53], [26.75, -16.0], [26.97, -15.47], [27.5, -15.25], [27.75, -15.35]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.97, -15.47], [28.5, -15.25], [29.03, -15.47], [29.25, -16.0], [29.03, -16.53], [28.5, -16.75], [27.97, -16.53], [27.75, -16.0], [27.97, -15.47]]]]}, "2025-08-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.75, -17.5], [27.97, -16.97], [28.32, -16.82], [28.38, -16.7], [27.97, -16.53], [27.75, -16.0], [27.97, -15.47], [28.5, -15.25], [29.0, -15.46], [29.5, -15.25], [30.03, -15.47], [30.25, -16.0], [30.15, -16.25], [30.25, -16.5], [30.15, -16.75], [30.25, -17.0], [30.03, -17.53], [29.68, -17.68], [29.65, -17.75], [29.75, -18.0], [29.53, -18.53], [29.0, -18.75], [28.75, -18.65], [28.5, -18.75], [27.97, -18.53], [27.75, -18.0], [27.85, -17.75], [27.75, -17.5]]]]}, "2025-08-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.75, -18.0], [27.85, -17.75], [27.75, -17.5], [27.97, -16.97], [28.32, -16.82], [28.35, -16.75], [28.32, -16.68], [27.97, -16.53], [27.75, -16.0], [27.97, -15.47], [28.5, -15.25], [28.75, -15.35], [29.0, -15.25], [29.25, -15.35], [29.5, -15.25], [30.03, -15.47], [30.25, -16.0], [30.15, -16.25], [30.25, -16.5], [30.15, -16.75], [30.18, -16.82], [30.53, -16.97], [30.75, -17.5], [30.53, -18.03], [30.18, -18.18], [30.03, -18.53], [29.5, -18.75], [29.25, -18.65], [29.18, -18.68], [29.03, -19.03], [28.5, -19.25], [27.97, -19.03], [27.75, -18.5], [27.85, -18.25], [27.75, -18.0]]]]}, "2025-08-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.5, -16.75], [26.97, -16.53], [26.75, -16.0], [26.97, -15.47], [27.5, -15.25], [27.75, -15.35], [28.0, -15.25], [28.25, -15.35], [28.5, -15.25], [28.75, -15.35], [29.0, -15.25], [29.25, -15.35], [29.5, -15.25], [30.03, -15.47], [30.25, -16.0], [30.15, -16.25], [30.25, -16.5], [30.15, -16.75], [30.18, -16.82], [30.53, -16.97], [30.75, -17.5], [30.53, -18.03], [30.18, -18.18], [30.03, -18.53], [29.5, -18.75], [29.25, -18.65], [29.18, -18.68], [29.03, -19.03], [28.5, -19.25], [27.97, -19.03], [27.75, -18.5], [27.85, -18.25], [27.75, -18.0], [27.85, -17.75], [27.75, -17.5], [27.97, -16.97], [28.32, -16.82], [28.35, -16.75], [28.32, -16.68], [28.25, -16.65], [28.0, -16.75], [27.75, -16.65], [27.5, -16.75]]]]}, "2025-08-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.5, -16.75], [26.97, -16.53], [26.75, -16.0], [26.97, -15.47], [27.5, -15.25], [27.75, -15.35], [28.0, -15.25], [28.25, -15.35], [28.5, -15.25], [28.75, -15.35], [29.0, -15.25], [29.25, -15.35], [29.5, -15.25], [30.03, -15.47], [30.25, -16.0], [30.15, -16.25], [30.25, -16.5], [30.15, -16.75], [30.18, -16.82], [30.53, -16.97], [30.75, -17.5], [30.53, -18.03], [30.18, -18.18], [30.03, -18.53], [29.5, -18.75], [29.25, -18.65], [29.18, -18.68], [29.03, -19.03], [28.5, -19.25], [27.97, -19.03], [27.75, -18.5], [27.85, -18.25], [27.75, -18.0], [27.85, -17.75], [27.75, -17.5], [27.97, -16.97], [28.32, -16.82], [28.35, -16.75], [28.32, -16.68], [28.25, -16.65], [28.0, -16.75], [27.75, -16.65], [27.5, -16.75]]]]}, "2025-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.97, -16.97], [28.5, -16.75], [28.75, -16.85], [29.0, -16.75], [29.53, -16.97], [29.75, -17.5], [29.53, -18.03], [29.18, -18.18], [29.03, -18.53], [28.5, -18.75], [27.97, -18.53], [27.75, -18.0], [27.85, -17.75], [27.75, -17.5], [27.97, -16.97]]], [[[26.97, -16.53], [26.75, -16.0], [26.97, -15.47], [27.5, -15.25], [27.75, -15.35], [28.0, -15.25], [28.53, -15.47], [28.75, -16.0], [28.53, -16.53], [28.0, -16.75], [27.75, -16.65], [27.5, -16.75], [26.97, -16.53]]]]}, "2025-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.5, -16.75], [26.97, -16.53], [26.75, -16.0], [26.97, -15.47], [27.5, -15.25], [27.75, -15.35], [28.0, -15.25], [28.53, -15.47], [28.75, -16.0], [28.53, -16.53], [28.0, -16.75], [27.75, -16.65], [27.5, -16.75]]]]}, "2025-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.5, -16.75], [26.97, -16.53], [26.75, -16.0], [26.97, -15.47], [27.5, -15.25], [27.75, -15.35], [28.0, -15.25], [28.53, -15.47], [28.75, -16.0], [28.53, -16.53], [28.0, -16.75], [27.75, -16.65], [27.5, -16.75]]]]}, "2025-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.5, -16.75], [26.97, -16.53], [26.75, -16.0], [26.97, -15.47], [27.5, -15.25], [27.75, -15.35], [28.0, -15.25], [28.53, -15.47], [28.75, -16.0], [28.53, -16.53], [28.0, -16.75], [27.75, -16.65], [27.5, -16.75]]]]}, "2025-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, -15.47], [28.0, -15.25], [28.53, -15.47], [28.75, -16.0], [28.53, -16.53], [28.0, -16.75], [27.47, -16.53], [27.25, -16.0], [27.47, -15.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 4.75198590418114}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 3.012603498770259}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.274690246582054, 24.108757979781558, 24.398429446750242, 24.644663148767904, 25.65195153928272, 24.296496073404967, 23.570930735270167, 23.75347544352212, 24.01398111979171, 23.589070892334007]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.274690246582054, 25.821684773763025, 26.176760609944665, 27.02128117879232, 27.520163472493493, 25.15772654215499, 24.034106190999353, 24.26527557373049, 24.40546061197921, 23.589070892334007]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [2.9455655016028572, 2.5835646524016247, 2.6786122362548137, 2.9479159669930404, 3.897674564327798, 2.5314417038611623, 2.5826763684662524, 2.6188811084736017, 2.714256881316686, 2.6541412273755327]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [2.9455655016028572, 3.748580342725745, 3.356420725092562, 3.6275326741617278, 4.75198590418114, 2.709027499984643, 2.6156412808794585, 2.6298232619729447, 2.822013405140922, 2.6541412273755327]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5144489128120109, 1.4495172253259077, 1.453316400706644, 1.5646484532135145, 2.1005621272461914, 1.4040359075153344, 1.3214715699825097, 1.3491741875182162, 1.44222940539379, 1.4404430936972605]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.5144489128120109, 1.8798838330675212, 1.7469013149217545, 1.954205590384196, 2.6329870708248126, 1.5894804968676746, 1.3373889237030705, 1.3542191906744059, 1.504402421276375, 1.4404430936972605]}}