{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:47.336403", "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-Jun-16_to_2023-Jun-21_307.0_48.5"}, "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": 2023060000575}, "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": "June 16 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 21 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": 66685.78588402377}, "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": ["Canada"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 48.5}, "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": 307.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "307.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 303.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 307.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 47.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 51.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-52.32, 48.68], [-51.97, 48.53], [-51.75, 48.0], [-51.85, 47.75], [-51.75, 47.5], [-51.97, 46.97], [-52.32, 46.82], 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"E.North-America", "N.Atlantic-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-06-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.25, 49.0], [-54.02999999999997, 49.53], [-53.5, 49.75], [-52.97000000000003, 49.53], [-52.81999999999999, 49.18], [-52.47000000000003, 49.03], [-52.25, 48.5], [-52.47000000000003, 47.97], [-53.0, 47.75], [-53.52999999999997, 47.97], [-53.68000000000001, 48.32], [-54.02999999999997, 48.47], [-54.25, 49.0]]], [[[-56.0, 51.75], [-55.75, 51.65], [-55.5, 51.75], [-54.97000000000003, 51.53], [-54.75, 51.0], [-54.97000000000003, 50.47], [-55.5, 50.25], [-55.75, 50.35], [-55.81999999999999, 50.32], [-55.97000000000003, 49.97], [-56.5, 49.75], [-57.02999999999997, 49.97], [-57.25, 50.5], [-57.02999999999997, 51.03], [-56.68000000000001, 51.18], [-56.52999999999997, 51.53], [-56.0, 51.75]]]]}, "2023-06-17T11:30:00.000000000": {"type": 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