{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:28.546755", "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": "2023-Jan-30_to_2023-Feb-04_27.0_-23.5"}, "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": 2023010001384}, "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": "January 30 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 04 2023"}, "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": 62028.977180653514}, "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"]}, "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": -23.5}, "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": 27.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "27.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 25.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 29.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[27.53, -22.97], [27.68, -23.32], [28.03, -23.47], [28.25, -24.0], [28.15, -24.25], [28.18, -24.32], [28.25, -24.35], 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step", "value": {"2023-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.75, -23.0], [24.85, -22.75], [24.75, -22.5], [24.97, -21.97], [25.5, -21.75], [26.03, -21.97], [26.18, -22.32], [26.25, -22.35], [26.5, -22.25], [27.03, -22.47], [27.18, -22.82], [27.53, -22.97], [27.75, -23.5], [27.65, -23.75], [27.75, -24.0], [27.53, -24.53], [27.0, -24.75], [26.75, -24.65], [26.5, -24.75], [25.97, -24.53], [25.82, -24.18], [25.75, -24.15], [25.5, -24.25], [24.97, -24.03], [24.75, -23.5], [24.85, -23.25], [24.75, -23.0]]]]}, "2023-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.75, -23.0], [24.85, -22.75], [24.75, -22.5], [24.97, -21.97], [25.5, -21.75], [26.03, -21.97], [26.18, -22.32], [26.25, -22.35], [26.5, -22.25], [27.03, -22.47], [27.18, -22.82], [27.53, -22.97], [27.75, -23.5], [27.65, -23.75], [27.75, -24.0], [27.53, -24.53], [27.0, -24.75], [26.75, -24.65], [26.5, -24.75], [25.97, -24.53], [25.82, -24.18], [25.75, -24.15], [25.5, 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