{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:59.509303", "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": "2025-Jan-21_to_2025-Jan-27_303.5_3.5"}, "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": 2025010000602}, "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 21 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 27 2025"}, "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": 120370.7376273597}, "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": ["Brazil", "French Guiana", "Suriname"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "America", "America"]}, "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": 3.5}, "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": 303.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "303.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 302.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 306.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -0.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 5.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-57.0, 1.75], [-56.75, 1.65], [-56.63, 1.7], [-56.68, 1.82], [-57.03, 1.97], [-57.18, 2.32], [-57.53, 2.47], [-57.75, 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["N.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.25, 4.0], [-57.02999999999997, 4.53], [-56.5, 4.75], [-56.25, 4.65], [-56.0, 4.75], [-55.75, 4.65], [-55.5, 4.75], [-55.25, 4.65], [-55.0, 4.75], [-54.47000000000003, 4.53], [-54.30000000000001, 4.12], [-54.0, 4.25], [-53.47000000000003, 4.03], [-53.25, 3.5], [-53.47000000000003, 2.97], [-54.0, 2.75], [-54.30000000000001, 2.88], [-54.47000000000003, 2.47], [-54.81999999999999, 2.32], [-54.95999999999998, 2.0], [-54.75, 1.5], [-54.97000000000003, 0.97], [-55.5, 0.75], [-56.02999999999997, 0.97], [-56.18000000000001, 1.32], [-56.52999999999997, 1.47], [-56.68000000000001, 1.82], [-57.02999999999997, 1.97], [-57.25, 2.5], [-57.04000000000002, 3.0], [-57.25, 3.5], [-57.14999999999998, 3.75], [-57.25, 4.0]]]]}, "2025-01-22T11:30:00.000000000": {"type": 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