{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:17:26.652386", "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": "2022-Feb-16_to_2022-Feb-23_14.5_-12.0"}, "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": 2022020000682}, "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": "February 16 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 23 2022"}, "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": 127083.8875588896}, "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": ["Angola"]}, "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": -12.0}, "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": 14.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "14.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 14.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 19.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -13.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -10.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[13.97, -10.97], [14.5, -10.75], [14.75, -10.85], [15.0, -10.75], [15.25, -10.85], [15.5, -10.75], [15.75, -10.85], [16.0, 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["Central-Africa", "W.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.5, -11.25], [16.97, -11.03], [16.75, -10.5], [16.97, -9.97], [17.5, -9.75], [18.03, -9.97], [18.25, -10.5], [18.03, -11.03], [17.5, -11.25]]], [[[18.82, -9.82], [18.97, -9.47], [19.5, -9.25], [20.03, -9.47], [20.25, -10.0], [20.03, -10.53], [19.68, -10.68], [19.53, -11.03], [19.0, -11.25], [18.47, -11.03], [18.25, -10.5], [18.47, -9.97], [18.82, -9.82]]]]}, "2022-02-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.5, -11.25], [16.97, -11.03], [16.75, -10.5], [16.97, -9.97], [17.5, -9.75], [18.03, -9.97], [18.25, -10.5], [18.03, -11.03], [17.5, -11.25]]], [[[18.82, -9.82], [18.97, -9.47], [19.5, -9.25], [20.03, -9.47], [20.25, -10.0], [20.03, -10.53], [19.68, -10.68], [19.53, -11.03], [19.0, -11.25], [18.47, 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