{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:54:33.495829", "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-Feb-13_to_2025-Feb-16_272.5_57.5"}, "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": 2025020000312}, "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 13 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 16 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 172059.55899237748}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North 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": ["Hudson Bay"]}, "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": 57.5}, "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": 272.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "272.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 268.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 276.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 55.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 59.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.53, 58.53], [-91.0, 58.75], [-90.75, 58.65], [-90.68, 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57.93], [-89.0, 57.75], [-88.7, 57.62]]]]}, "2025-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.53, 59.03], [-91.0, 59.25], [-90.75, 59.15], [-90.5, 59.25], [-90.25, 59.15], [-90.0, 59.25], [-89.75, 59.15], [-89.68, 59.18], [-89.53, 59.53], [-89.18, 59.68], [-89.03, 60.03], [-88.5, 60.25], [-88.25, 60.15], [-88.0, 60.25], [-87.47, 60.03], [-87.32, 59.68], [-87.25, 59.65], [-87.0, 59.75], [-86.75, 59.65], [-86.5, 59.75], [-85.97, 59.53], [-85.82, 59.18], [-85.75, 59.15], [-85.5, 59.25], [-85.25, 59.15], [-85.0, 59.25], [-84.75, 59.15], [-84.5, 59.25], [-83.97, 59.03], [-83.82, 58.68], [-83.75, 58.65], [-83.5, 58.75], [-82.97, 58.53], [-82.75, 58.0], [-82.85, 57.75], [-82.75, 57.5], [-82.85, 57.25], [-82.75, 57.0], [-82.85, 56.75], [-82.75, 56.5], [-82.97, 55.97], [-83.32, 55.82], [-83.47, 55.47], [-84.0, 55.25], [-84.25, 55.35], [-84.5, 55.25], [-84.75, 55.35], [-85.0, 55.25], [-85.25, 55.35], [-85.32, 55.32], [-85.47, 54.97], [-86.0, 54.75], [-86.25, 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