{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:43.482645", "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-Nov-08_to_2025-Nov-10_278.5_49.0"}, "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": 2025110000250}, "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": "November 08 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 10 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 98237.764855713}, "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": 49.0}, "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": 278.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "278.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 275.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 280.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 49.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-84.5, 48.25], [-84.25, 48.15], [-84.0, 48.25], [-83.75, 48.15], [-83.68, 48.18], [-83.65, 48.25], [-83.75, 48.5], [-83.65, 48.75], [-83.75, 49.0], [-83.53, 49.53], [-83.0, 49.75], [-82.47, 49.53], [-82.32, 49.18], [-82.25, 49.15], [-82.18, 49.18], [-82.03, 49.53], [-81.5, 49.75], [-81.25, 49.65], [-81.0, 49.75], [-80.75, 49.65], [-80.5, 49.75], [-79.97, 49.53], [-79.75, 49.0], [-79.85, 48.75], [-79.82, 48.68], [-79.47, 48.53], [-79.32, 48.18], [-78.97, 48.03], [-78.75, 47.5], [-78.97, 46.97], [-79.32, 46.82], [-79.47, 46.47], [-80.0, 46.25], [-80.25, 46.35], [-80.5, 46.25], [-80.75, 46.35], [-80.87, 46.3], [-80.75, 46.0], [-80.97, 45.47], [-81.5, 45.25], [-81.75, 45.35], [-81.82, 45.32], [-81.97, 44.97], [-82.5, 44.75], [-83.03, 44.97], [-83.18, 45.32], [-83.53, 45.47], [-83.68, 45.82], [-83.75, 45.85], [-84.0, 45.75], [-84.53, 45.97], [-84.68, 46.32], [-85.03, 46.47], [-85.25, 47.0], [-85.15, 47.25], [-85.25, 47.5], [-85.03, 48.03], [-84.5, 48.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-85.25, 47.5], [-85.02999999999997, 48.03], [-84.5, 48.25], [-84.25, 48.15], [-84.0, 48.25], [-83.75, 48.15], [-83.68, 48.18], [-83.64999999999998, 48.25], [-83.75, 48.5], [-83.64999999999998, 48.75], [-83.75, 49.0], [-83.52999999999997, 49.53], [-83.0, 49.75], [-82.47000000000003, 49.53], [-82.32, 49.18], [-82.25, 49.15], [-82.18, 49.18], [-82.02999999999997, 49.53], [-81.5, 49.75], [-81.25, 49.65], [-81.0, 49.75], [-80.75, 49.65], [-80.5, 49.75], [-79.97000000000003, 49.53], [-79.75, 49.0], [-79.85000000000002, 48.75], [-79.82, 48.68], [-79.47000000000003, 48.53], [-79.32, 48.18], [-78.97000000000003, 48.03], [-78.75, 47.5], [-78.97000000000003, 46.97], [-79.32, 46.82], [-79.47000000000003, 46.47], [-80.0, 46.25], [-80.25, 46.35], [-80.5, 46.25], [-80.75, 46.35], [-80.87, 46.3], [-80.75, 46.0], [-80.97000000000003, 45.47], [-81.5, 45.25], [-81.75, 45.35], [-81.82, 45.32], [-81.97000000000003, 44.97], [-82.5, 44.75], [-83.02999999999997, 44.97], [-83.18, 45.32], [-83.52999999999997, 45.47], [-83.68, 45.82], [-83.75, 45.85], [-84.0, 45.75], [-84.52999999999997, 45.97], [-84.68, 46.32], [-85.02999999999997, 46.47], [-85.25, 47.0], [-85.14999999999998, 47.25], [-85.25, 47.5]]]]}, "2025-11-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-85.25, 47.5], [-85.02999999999997, 48.03], [-84.5, 48.25], [-84.25, 48.15], [-84.0, 48.25], [-83.75, 48.15], [-83.68, 48.18], [-83.64999999999998, 48.25], [-83.75, 48.5], [-83.64999999999998, 48.75], [-83.75, 49.0], [-83.52999999999997, 49.53], [-83.0, 49.75], [-82.47000000000003, 49.53], [-82.32, 49.18], [-82.25, 49.15], [-82.18, 49.18], [-82.02999999999997, 49.53], [-81.5, 49.75], [-81.25, 49.65], [-81.0, 49.75], [-80.75, 49.65], [-80.5, 49.75], [-79.97000000000003, 49.53], [-79.75, 49.0], [-79.85000000000002, 48.75], [-79.82, 48.68], [-79.47000000000003, 48.53], [-79.32, 48.18], [-78.97000000000003, 48.03], [-78.75, 47.5], [-78.97000000000003, 46.97], [-79.32, 46.82], [-79.47000000000003, 46.47], [-80.0, 46.25], [-80.25, 46.35], [-80.5, 46.25], [-80.75, 46.35], [-80.87, 46.3], [-80.75, 46.0], [-80.97000000000003, 45.47], [-81.5, 45.25], [-81.75, 45.35], [-81.82, 45.32], [-81.97000000000003, 44.97], [-82.5, 44.75], [-83.02999999999997, 44.97], [-83.18, 45.32], [-83.52999999999997, 45.47], [-83.68, 45.82], [-83.75, 45.85], [-84.0, 45.75], [-84.52999999999997, 45.97], [-84.68, 46.32], [-85.02999999999997, 46.47], [-85.25, 47.0], [-85.14999999999998, 47.25], [-85.25, 47.5]]]]}, "2025-11-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-85.25, 47.5], [-85.02999999999997, 48.03], [-84.5, 48.25], [-84.25, 48.15], [-84.0, 48.25], [-83.75, 48.15], [-83.68, 48.18], [-83.64999999999998, 48.25], [-83.75, 48.5], [-83.64999999999998, 48.75], [-83.75, 49.0], [-83.52999999999997, 49.53], [-83.0, 49.75], [-82.47000000000003, 49.53], [-82.32, 49.18], [-82.25, 49.15], [-82.18, 49.18], [-82.02999999999997, 49.53], [-81.5, 49.75], [-81.25, 49.65], [-81.0, 49.75], [-80.75, 49.65], [-80.5, 49.75], [-79.97000000000003, 49.53], [-79.75, 49.0], [-79.85000000000002, 48.75], [-79.82, 48.68], [-79.47000000000003, 48.53], [-79.32, 48.18], [-78.97000000000003, 48.03], [-78.75, 47.5], [-78.97000000000003, 46.97], [-79.32, 46.82], [-79.47000000000003, 46.47], [-80.0, 46.25], [-80.25, 46.35], [-80.5, 46.25], [-80.75, 46.35], [-80.87, 46.3], [-80.75, 46.0], [-80.97000000000003, 45.47], [-81.5, 45.25], [-81.75, 45.35], [-81.82, 45.32], [-81.97000000000003, 44.97], [-82.5, 44.75], [-83.02999999999997, 44.97], [-83.18, 45.32], [-83.52999999999997, 45.47], [-83.68, 45.82], [-83.75, 45.85], [-84.0, 45.75], [-84.52999999999997, 45.97], [-84.68, 46.32], [-85.02999999999997, 46.47], [-85.25, 47.0], [-85.14999999999998, 47.25], [-85.25, 47.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.306317618638616}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.651728951337167}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-6.82915482216697, -7.699900866569294, -8.174074459752262]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-10.563280487060524, -12.183626556396462, -11.50793876647947]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.2709222089273675, -7.773135426981333, -7.911129218102798]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.547674780063744, -10.306317618638616, -9.621260408074818]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4790656865344305, -1.5130797545369095, -1.5186352319111756]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.761994478516807, -1.7810130155935946, -1.8426393520309285]}}