{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:43.141185", "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-Jan-04_to_2026-Jan-10_38.0_7.0"}, "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": 2026010000201}, "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 04 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 10 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 137559.58825946282}, "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": ["Ethiopia"]}, "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": 7.0}, "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": 38.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "38.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 37.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 42.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 6.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 11.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[41.53, 7.03], [41.68, 6.68], [42.03, 6.53], [42.25, 6.0], [42.03, 5.47], [41.5, 5.25], [41.25, 5.35], [41.0, 5.25], [40.47, 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["N.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[37.75, 8.5], [37.85, 8.75], [37.75, 9.0], [37.97, 9.53], [38.5, 9.75], [38.75, 9.65], [38.82, 9.68], [38.85, 9.75], [38.75, 10.0], [38.96, 10.5], [38.75, 11.0], [38.97, 11.53], [39.5, 11.75], [39.75, 11.65], [40.0, 11.75], [40.53, 11.53], [40.7, 11.13], [41.0, 11.25], [41.25, 11.15], [41.5, 11.25], [42.03, 11.03], [42.18, 10.68], [42.53, 10.53], [42.75, 10.0], [42.53, 9.47], [42.13, 9.3], [42.25, 9.0], [42.03, 8.47], [41.68, 8.32], [41.53, 7.97], [41.0, 7.75], [40.75, 7.85], [40.68, 7.82], [40.53, 7.47], [40.18, 7.32], [40.03, 6.97], [39.5, 6.75], [39.25, 6.85], [39.0, 6.75], [38.7, 6.88], [38.53, 6.47], [38.0, 6.25], [37.47, 6.47], [37.25, 7.0], [37.47, 7.53], [37.88, 7.7], [37.75, 8.0], [37.85, 8.25], [37.75, 8.5]]]]}, "2026-01-05T11:30:00.000000000": 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