{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:19:42.604215", "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": "2022-Apr-18_to_2022-Apr-21_16.5_-28.5"}, "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": 2022040002079}, "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": "April 18 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 21 2022"}, "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": 90907.03594321459}, "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": ["Atlantic Ocean"]}, "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": -28.5}, "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": 16.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "16.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 18.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -30.0}, "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": [[[[18.75, -30.0], [18.53, -30.53], [18.0, -30.75], [17.75, -30.65], [17.5, -30.75], [17.25, -30.65], [17.0, -30.75], [16.47, -30.53], [16.25, -30.0], [16.35, -29.75], [16.32, -29.68], [15.97, -29.53], [15.75, -29.0], [15.85, -28.75], [15.82, -28.68], [15.47, -28.53], [15.32, -28.18], [14.97, -28.03], [14.75, -27.5], [14.85, -27.25], [14.82, -27.18], [14.47, -27.03], [14.25, -26.5], [14.35, -26.25], [14.25, -26.0], [14.35, -25.75], [14.25, -25.5], [14.35, -25.25], [14.25, -25.0], [14.35, -24.75], [14.25, -24.5], [14.47, -23.97], [14.82, -23.82], [14.97, -23.47], [15.5, -23.25], [16.03, -23.47], [16.18, -23.82], [16.53, -23.97], [16.75, -24.5], [16.65, -24.75], [16.75, -25.0], [16.65, -25.25], [16.75, -25.5], [16.65, -25.75], [16.75, -26.0], [16.65, -26.25], [16.68, -26.32], [17.03, -26.47], [17.25, -27.0], [17.15, -27.25], [17.18, -27.32], [17.53, -27.47], [17.75, -28.0], [17.65, -28.25], [17.75, -28.5], [17.65, -28.75], [17.75, -29.0], [17.65, -29.25], [17.68, -29.32], [17.75, -29.35], [18.0, -29.25], [18.53, -29.47], [18.75, -30.0]]]]}}, "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": {"2022-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, -26.0], [14.35, -25.75], [14.25, -25.5], [14.35, -25.25], [14.25, -25.0], [14.35, -24.75], [14.25, -24.5], [14.47, -23.97], [14.82, -23.82], [14.97, -23.47], [15.5, -23.25], [16.03, -23.47], [16.18, -23.82], [16.53, -23.97], [16.75, -24.5], [16.65, -24.75], [16.75, -25.0], [16.65, -25.25], [16.75, -25.5], [16.65, -25.75], [16.75, -26.0], [16.65, -26.25], [16.68, -26.32], [17.03, -26.47], [17.25, -27.0], [17.15, -27.25], [17.18, -27.32], [17.53, -27.47], [17.75, -28.0], [17.65, -28.25], [17.75, -28.5], [17.65, -28.75], [17.75, -29.0], [17.65, -29.25], [17.68, -29.32], [18.03, -29.47], [18.25, -30.0], [18.03, -30.53], [17.5, -30.75], [17.25, -30.65], [17.0, -30.75], [16.47, -30.53], [16.25, -30.0], [16.35, -29.75], 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"value": 6.723623717058053}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.173885629701942, 26.87430847396729, 25.674741073605105, 22.21037982107117]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [29.263667350303706, 30.184453238488402, 29.55822354371145, 22.21037982107117]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [5.69181311847305, 7.720620296318505, 6.772632335348433, 5.223391352600856]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [8.784643140867217, 12.144092922487062, 9.911377740848025, 5.223391352600856]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.965272505839229, 2.7048312748685994, 2.302872994175978, 1.4425991240985288]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.854925731696917, 4.596518921939673, 3.7270000553287455, 1.4425991240985288]}}