{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:56.223883", "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": "2026-Mar-05_to_2026-Mar-08_22.5_-30.5"}, "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": 2026030000189}, "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": "March 05 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 08 2026"}, "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": "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": 73979.24859874832}, "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"]}, "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": -30.5}, "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": 22.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "22.5\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": 22.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -30.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -25.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.5, -29.75], [23.03, -29.97], [23.25, -30.5], [23.03, -31.03], [22.5, -31.25], [21.97, -31.03], [21.75, -30.5], [21.97, -29.97], [22.5, -29.75]]]]}, "2026-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.35, -26.75], [19.25, -26.5], [19.47, -25.97], [19.82, -25.82], [19.85, -25.75], [19.75, -25.5], [19.97, -24.97], [20.5, -24.75], [20.75, -24.85], [21.0, -24.75], [21.53, -24.97], [21.68, -25.32], [22.03, -25.47], [22.18, -25.82], [22.53, -25.97], [22.75, -26.5], [22.65, -26.75], [22.75, -27.0], [22.53, -27.53], [22.0, -27.75], [21.75, -27.65], [21.68, -27.68], [21.65, -27.75], [21.68, -27.82], [22.03, -27.97], [22.25, -28.5], [22.15, -28.75], [22.18, -28.82], [22.53, -28.97], [22.68, -29.32], [23.03, -29.47], [23.25, -30.0], [23.15, -30.25], [23.25, -30.5], [23.03, -31.03], [22.5, -31.25], [22.25, -31.15], [22.0, -31.25], [21.47, -31.03], [21.25, -30.5], [21.35, -30.25], [21.25, -30.0], [21.35, -29.75], [21.32, -29.68], [20.97, -29.53], [20.82, -29.18], [20.47, -29.03], [20.25, -28.5], [20.35, -28.25], [20.32, -28.18], [20.25, -28.15], [20.0, -28.25], [19.47, -28.03], [19.25, -27.5], [19.35, -27.25], [19.25, -27.0], [19.35, -26.75]]]]}, "2026-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.35, -26.75], [19.25, -26.5], [19.47, -25.97], [19.82, -25.82], [19.85, -25.75], [19.75, -25.5], [19.97, -24.97], [20.5, -24.75], [20.75, -24.85], [21.0, -24.75], [21.53, -24.97], [21.68, -25.32], [22.03, -25.47], [22.18, -25.82], [22.53, -25.97], [22.75, -26.5], [22.65, -26.75], [22.75, -27.0], [22.53, -27.53], [22.0, -27.75], [21.75, -27.65], [21.68, -27.68], [21.65, -27.75], [21.68, -27.82], [22.03, -27.97], [22.25, -28.5], [22.15, -28.75], [22.18, -28.82], [22.53, -28.97], [22.68, -29.32], [23.03, -29.47], [23.25, -30.0], [23.15, -30.25], [23.25, -30.5], [23.03, -31.03], [22.5, -31.25], [22.25, -31.15], [22.0, -31.25], [21.47, -31.03], [21.25, -30.5], [21.35, -30.25], [21.25, -30.0], [21.35, -29.75], [21.32, -29.68], [20.97, -29.53], [20.82, -29.18], [20.47, -29.03], [20.25, 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[-4.471508751907663, -4.439594760224183, -6.9875066124171905, -4.4484137299818665]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.471508751907663, -5.753594285245924, -7.676942446750104, -6.658002798350196]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4669365029276247, -1.7094066207702687, -2.6913384002497343, -1.6798309143527133]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4669365029276247, -2.1033019164186397, -3.1519180790369545, -2.1452386656838396]}}