{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:17.957515", "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": "2024-Apr-09_to_2024-Apr-14_26.0_-34.0"}, "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": 2024040000221}, "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 09 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 14 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 54290.448278903976}, "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": ["Indian 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": -34.0}, "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": 26.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "26.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 23.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 27.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -34.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -32.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[26.5, -34.75], [26.25, -34.65], [26.0, -34.75], [25.75, -34.65], [25.5, -34.75], [25.25, -34.65], [25.0, -34.75], [24.75, -34.65], [24.5, -34.75], [23.97, -34.53], [23.75, -34.0], [23.85, -33.75], [23.82, -33.68], [23.5, -33.54], [23.0, -33.75], [22.47, -33.53], [22.25, -33.0], [22.35, -32.75], [22.25, -32.5], [22.47, -31.97], [23.0, -31.75], [23.25, -31.85], [23.5, -31.75], [23.75, -31.85], [24.0, -31.75], [24.25, -31.85], [24.5, -31.75], [25.03, -31.97], [25.18, -32.32], [25.25, -32.35], [25.5, -32.25], [26.03, -32.47], [26.18, -32.82], [26.25, -32.85], [26.32, -32.82], [26.47, -32.47], [26.82, -32.32], [26.97, -31.97], [27.5, -31.75], [28.03, -31.97], [28.25, -32.5], [28.04, -33.0], [28.25, -33.5], [28.03, -34.03], [27.5, -34.25], [27.2, -34.12], [27.03, -34.53], [26.5, -34.75]]]]}}, "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": {"2024-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.97, -33.47], [26.5, -33.25], [27.03, -33.47], [27.25, -34.0], [27.03, -34.53], [26.5, -34.75], [25.97, -34.53], [25.75, -34.0], [25.97, -33.47]]]]}, "2024-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.5, -34.75], [24.97, -34.53], [24.75, -34.0], [24.97, -33.47], [25.5, -33.25], [25.75, -33.35], [26.0, -33.25], [26.25, -33.35], [26.5, -33.25], [26.8, -33.37], [26.97, -32.97], [27.5, -32.75], [28.03, -32.97], [28.25, -33.5], [28.03, -34.03], [27.5, -34.25], [27.2, -34.12], [27.03, -34.53], [26.5, -34.75], [26.25, -34.65], [26.0, -34.75], [25.75, -34.65], [25.5, -34.75]]]]}, "2024-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -32.5], [22.47, -31.97], [23.0, -31.75], [23.25, -31.85], [23.5, -31.75], [23.75, -31.85], [24.0, -31.75], [24.25, -31.85], [24.5, -31.75], [25.03, -31.97], [25.18, -32.32], [25.25, -32.35], [25.5, -32.25], [26.03, -32.47], [26.18, -32.82], [26.25, -32.85], [26.32, 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13.710131984902716, 13.540240545853294, 14.105991423763328, 12.764979283755451]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.372831583598668, 16.833697167302716, 10.88024742633246, 10.684277069556174, 12.16251674222093, 12.519976795743673]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7950309715928938, -2.246609495525419, -4.959829097848732, -5.066964792364044, -4.263920506623005, -5.259044024332297]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.7950309715928938, -2.371189331292271, -7.071211722277781, -7.345060228267869, -5.413265816862065, -5.355416143664286]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2471831922360026, -1.4657216379161406, -1.6659348418689386, -1.7188195807334854, -1.429544691620884, -1.347832787208747]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2471831922360026, -1.6283040741666701, -1.8510954086247338, -2.1879437239372055, -1.7597625218361068, -1.3520361752071282]}}