{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:49.639146", "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-Mar-26_to_2023-Apr-02_13.0_-20.5"}, "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": 2023030000848}, "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 26 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 02 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 74820.30537715573}, "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"]}, "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": ["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": -20.5}, "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": 13.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "13.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 11.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 15.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -18.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[13.03, -18.97], [13.18, -19.32], [13.53, -19.47], [13.75, -20.0], [13.65, -20.25], [13.68, -20.32], [14.03, -20.47], 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["W.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.97, -20.47], [13.5, -20.25], [14.03, -20.47], [14.25, -21.0], [14.03, -21.53], [13.5, -21.75], [12.97, -21.53], [12.75, -21.0], [12.97, -20.47]]]]}, "2023-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.47, -21.03], [12.25, -20.5], [12.47, -19.97], [13.0, -19.75], [13.53, -19.97], [13.68, -20.32], [14.03, -20.47], [14.25, -21.0], [14.15, -21.25], [14.18, -21.32], [14.53, -21.47], [14.75, -22.0], [14.53, -22.53], [14.0, -22.75], [13.47, -22.53], [13.32, -22.18], [12.97, -22.03], [12.75, -21.5], [12.85, -21.25], [12.82, -21.18], [12.47, -21.03]]]]}, "2023-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.97, -20.53], [11.75, -20.0], [11.97, -19.47], [12.5, -19.25], [13.03, -19.47], [13.18, -19.82], [13.53, 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