{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:55:06.967313", "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-Apr-23_to_2025-Apr-27_21.0_-24.0"}, "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": 2025040000481}, "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 23 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 27 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 95860.74311972906}, "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", "South Africa"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-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": -24.0}, "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": 21.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 19.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 24.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.25, -23.5], [19.47, -22.97], [20.0, -22.75], [20.25, 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-25.15], [21.5, -25.25], [21.25, -25.15], [21.0, -25.25], [20.47, -25.03], [20.32, -24.68], [19.97, -24.53], [19.82, -24.18], [19.47, -24.03], [19.25, -23.5]]]]}, "2025-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.25, -23.5], [19.47, -22.97], [20.0, -22.75], [20.25, -22.85], [20.5, -22.75], [20.75, -22.85], [21.0, -22.75], [21.25, -22.85], [21.5, -22.75], [21.75, -22.85], [22.0, -22.75], [22.25, -22.85], [22.32, -22.82], [22.47, -22.47], [23.0, -22.25], [23.25, -22.35], [23.5, -22.25], [24.03, -22.47], [24.25, -23.0], [24.15, -23.25], [24.18, -23.32], [24.25, -23.35], [24.5, -23.25], [25.03, -23.47], [25.25, -24.0], [25.15, -24.25], [25.25, -24.5], [25.03, -25.03], [24.68, -25.18], [24.65, -25.25], [24.75, -25.5], [24.53, -26.03], [24.0, -26.25], [23.75, -26.15], [23.5, -26.25], [23.25, -26.15], [23.0, -26.25], [22.47, -26.03], [22.32, -25.68], [21.97, -25.53], [21.82, -25.18], [21.75, -25.15], [21.5, -25.25], [21.25, -25.15], [21.0, -25.25], [20.47, -25.03], [20.32, -24.68], [19.97, -24.53], [19.82, -24.18], [19.47, -24.03], [19.25, -23.5]]]]}, "2025-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.97, -22.97], [20.5, -22.75], [20.75, -22.85], [21.0, -22.75], [21.25, -22.85], [21.5, -22.75], [21.75, -22.85], [22.0, -22.75], [22.25, -22.85], [22.32, -22.82], [22.47, -22.47], [23.0, -22.25], [23.25, -22.35], [23.5, -22.25], [24.03, -22.47], [24.25, -23.0], [24.15, -23.25], [24.18, -23.32], [24.25, -23.35], [24.5, -23.25], [25.03, -23.47], [25.25, -24.0], [25.15, -24.25], [25.25, -24.5], [25.03, -25.03], [24.68, -25.18], [24.65, -25.25], [24.75, -25.5], [24.53, -26.03], [24.0, -26.25], [23.75, -26.15], [23.5, -26.25], [23.25, -26.15], [23.0, -26.25], [22.47, -26.03], [22.32, -25.68], [21.97, -25.53], [21.82, -25.18], [21.75, -25.15], [21.5, -25.25], [21.25, -25.15], [21.0, -25.25], [20.47, -25.03], [20.32, -24.68], [19.97, -24.53], [19.75, -24.0], [19.85, -23.75], [19.75, -23.5], [19.97, -22.97]]]]}, 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"Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.36194763183596, 14.1869941711426, 14.642172749837243, 15.18324686686202, 16.907318369547568]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.499632540876533, -4.5922616443531545, -4.472594611869067, -4.043674092128981, -3.344842770372466]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.644843504401706, -5.853875996851514, -5.16713314675826, -5.2062735415774455, -3.596399954690071]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3888628564882937, -1.8288095990945354, -1.7962301065584756, -1.6568734877331688, -1.3633607914491492]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4686636354689317, -2.272858928418025, -2.003202865380953, -2.266880354953586, -1.4627448934174705]}}